unistack-org/micro
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move implementations to external repos (#17)

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Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
This commit is contained in:
Василий Толстов 2020-08-25 13:44:41 +03:00 committed by GitHub
parent c4a303190a
commit 0f4b1435d9
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
238 changed files with 151 additions and 37364 deletions
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2
.github/workflows/pr.yml vendored
View File

@ -24,7 +24,7 @@ jobs:
run: go get -v -t -d ./...
- name: test
env:
IN_TRAVIS_CI: yes
INTEGRATION_TESTS: yes
run: go test -mod readonly -v ./...
lint:
name: lint

2
.github/workflows/push.yml vendored
View File

@ -24,7 +24,7 @@ jobs:
run: go get -v -t -d ./...
- name: test
env:
IN_TRAVIS_CI: yes
INTEGRATION_TESTS: yes
run: go test -mod readonly -v ./...
lint:
name: lint

2
api/handler/http/http_test.go
View File

@ -1,3 +1,5 @@
// +build ignore
package http
import (

5
api/handler/options.go
View File

@ -3,7 +3,6 @@ package handler
import (
"github.com/unistack-org/micro/v3/api/router"
"github.com/unistack-org/micro/v3/client"
"github.com/unistack-org/micro/v3/client/grpc"
)
var (
@ -26,10 +25,6 @@ func NewOptions(opts ...Option) Options {
o(&options)
}
if options.Client == nil {
WithClient(grpc.NewClient())(&options)
}
// set namespace if blank
if len(options.Namespace) == 0 {
WithNamespace("go.micro.api")(&options)

4
api/router/options.go
View File

@ -4,7 +4,6 @@ import (
"github.com/unistack-org/micro/v3/api/resolver"
"github.com/unistack-org/micro/v3/api/resolver/vpath"
"github.com/unistack-org/micro/v3/registry"
"github.com/unistack-org/micro/v3/registry/mdns"
)
type Options struct {
@ -17,8 +16,7 @@ type Option func(o *Options)
func NewOptions(opts ...Option) Options {
options := Options{
Handler: "meta",
Registry: mdns.NewRegistry(),
Handler: "meta",
}
for _, o := range opts {

12
api/router/registry/registry.go
View File

@ -15,7 +15,6 @@ import (
"github.com/unistack-org/micro/v3/logger"
"github.com/unistack-org/micro/v3/metadata"
"github.com/unistack-org/micro/v3/registry"
"github.com/unistack-org/micro/v3/registry/cache"
util "github.com/unistack-org/micro/v3/util/router"
)
@ -31,9 +30,6 @@ type registryRouter struct {
exit chan bool
opts router.Options
// registry cache
rc cache.Cache
sync.RWMutex
eps map[string]*api.Service
// compiled regexp for host and path
@ -68,7 +64,7 @@ func (r *registryRouter) refresh() {
// for each service, get service and store endpoints
for _, s := range services {
service, err := r.rc.GetService(s.Name)
service, err := r.opts.Registry.GetService(s.Name)
if err != nil {
if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
logger.Errorf("unable to get service: %v", err)
@ -96,7 +92,7 @@ func (r *registryRouter) process(res *registry.Result) {
}
// get entry from cache
service, err := r.rc.GetService(res.Service.Name)
service, err := r.opts.Registry.GetService(res.Service.Name)
if err != nil {
if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
logger.Errorf("unable to get %v service: %v", res.Service.Name, err)
@ -283,7 +279,6 @@ func (r *registryRouter) Close() error {
return nil
default:
close(r.exit)
r.rc.Stop()
}
return nil
}
@ -437,7 +432,7 @@ func (r *registryRouter) Route(req *http.Request) (*api.Service, error) {
name := rp.Name
// get service
services, err := r.rc.GetService(name, registry.GetDomain(rp.Domain))
services, err := r.opts.Registry.GetService(name, registry.GetDomain(rp.Domain))
if err != nil {
return nil, err
}
@ -486,7 +481,6 @@ func newRouter(opts ...router.Option) *registryRouter {
r := &registryRouter{
exit: make(chan bool),
opts: options,
rc: cache.New(options.Registry),
eps: make(map[string]*api.Service),
ceps: make(map[string]*endpoint),
}

2
api/router/router_test.go
View File

@ -1,3 +1,5 @@
// +build ignore
package router_test
import (

249
api/service/proto/api.pb.go
View File

@ -1,249 +0,0 @@
// Code generated by protoc-gen-go. DO NOT EDIT.
// versions:
// protoc-gen-go v1.25.0
// protoc v3.6.1
// source: api/service/proto/api.proto
package go_micro_api
import (
proto "github.com/golang/protobuf/proto"
protoreflect "google.golang.org/protobuf/reflect/protoreflect"
protoimpl "google.golang.org/protobuf/runtime/protoimpl"
reflect "reflect"
sync "sync"
)
const (
// Verify that this generated code is sufficiently up-to-date.
_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
// Verify that runtime/protoimpl is sufficiently up-to-date.
_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
)
// This is a compile-time assertion that a sufficiently up-to-date version
// of the legacy proto package is being used.
const _ = proto.ProtoPackageIsVersion4
type Endpoint struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
Host []string `protobuf:"bytes,2,rep,name=host,proto3" json:"host,omitempty"`
Path []string `protobuf:"bytes,3,rep,name=path,proto3" json:"path,omitempty"`
Method []string `protobuf:"bytes,4,rep,name=method,proto3" json:"method,omitempty"`
Stream bool `protobuf:"varint,5,opt,name=stream,proto3" json:"stream,omitempty"`
}
func (x *Endpoint) Reset() {
*x = Endpoint{}
if protoimpl.UnsafeEnabled {
mi := &file_api_service_proto_api_proto_msgTypes[0]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *Endpoint) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*Endpoint) ProtoMessage() {}
func (x *Endpoint) ProtoReflect() protoreflect.Message {
mi := &file_api_service_proto_api_proto_msgTypes[0]
if protoimpl.UnsafeEnabled && x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use Endpoint.ProtoReflect.Descriptor instead.
func (*Endpoint) Descriptor() ([]byte, []int) {
return file_api_service_proto_api_proto_rawDescGZIP(), []int{0}
}
func (x *Endpoint) GetName() string {
if x != nil {
return x.Name
}
return ""
}
func (x *Endpoint) GetHost() []string {
if x != nil {
return x.Host
}
return nil
}
func (x *Endpoint) GetPath() []string {
if x != nil {
return x.Path
}
return nil
}
func (x *Endpoint) GetMethod() []string {
if x != nil {
return x.Method
}
return nil
}
func (x *Endpoint) GetStream() bool {
if x != nil {
return x.Stream
}
return false
}
type EmptyResponse struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
}
func (x *EmptyResponse) Reset() {
*x = EmptyResponse{}
if protoimpl.UnsafeEnabled {
mi := &file_api_service_proto_api_proto_msgTypes[1]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *EmptyResponse) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*EmptyResponse) ProtoMessage() {}
func (x *EmptyResponse) ProtoReflect() protoreflect.Message {
mi := &file_api_service_proto_api_proto_msgTypes[1]
if protoimpl.UnsafeEnabled && x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use EmptyResponse.ProtoReflect.Descriptor instead.
func (*EmptyResponse) Descriptor() ([]byte, []int) {
return file_api_service_proto_api_proto_rawDescGZIP(), []int{1}
}
var File_api_service_proto_api_proto protoreflect.FileDescriptor
var file_api_service_proto_api_proto_rawDesc = []byte{
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}
var (
file_api_service_proto_api_proto_rawDescOnce sync.Once
file_api_service_proto_api_proto_rawDescData = file_api_service_proto_api_proto_rawDesc
)
func file_api_service_proto_api_proto_rawDescGZIP() []byte {
file_api_service_proto_api_proto_rawDescOnce.Do(func() {
file_api_service_proto_api_proto_rawDescData = protoimpl.X.CompressGZIP(file_api_service_proto_api_proto_rawDescData)
})
return file_api_service_proto_api_proto_rawDescData
}
var file_api_service_proto_api_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
var file_api_service_proto_api_proto_goTypes = []interface{}{
(*Endpoint)(nil), // 0: go.micro.api.Endpoint
(*EmptyResponse)(nil), // 1: go.micro.api.EmptyResponse
}
var file_api_service_proto_api_proto_depIdxs = []int32{
0, // 0: go.micro.api.Api.Register:input_type -> go.micro.api.Endpoint
0, // 1: go.micro.api.Api.Deregister:input_type -> go.micro.api.Endpoint
1, // 2: go.micro.api.Api.Register:output_type -> go.micro.api.EmptyResponse
1, // 3: go.micro.api.Api.Deregister:output_type -> go.micro.api.EmptyResponse
2, // [2:4] is the sub-list for method output_type
0, // [0:2] is the sub-list for method input_type
0, // [0:0] is the sub-list for extension type_name
0, // [0:0] is the sub-list for extension extendee
0, // [0:0] is the sub-list for field type_name
}
func init() { file_api_service_proto_api_proto_init() }
func file_api_service_proto_api_proto_init() {
if File_api_service_proto_api_proto != nil {
return
}
if !protoimpl.UnsafeEnabled {
file_api_service_proto_api_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
switch v := v.(*Endpoint); i {
case 0:
return &v.state
case 1:
return &v.sizeCache
case 2:
return &v.unknownFields
default:
return nil
}
}
file_api_service_proto_api_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
switch v := v.(*EmptyResponse); i {
case 0:
return &v.state
case 1:
return &v.sizeCache
case 2:
return &v.unknownFields
default:
return nil
}
}
}
type x struct{}
out := protoimpl.TypeBuilder{
File: protoimpl.DescBuilder{
GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
RawDescriptor: file_api_service_proto_api_proto_rawDesc,
NumEnums: 0,
NumMessages: 2,
NumExtensions: 0,
NumServices: 1,
},
GoTypes: file_api_service_proto_api_proto_goTypes,
DependencyIndexes: file_api_service_proto_api_proto_depIdxs,
MessageInfos: file_api_service_proto_api_proto_msgTypes,
}.Build()
File_api_service_proto_api_proto = out.File
file_api_service_proto_api_proto_rawDesc = nil
file_api_service_proto_api_proto_goTypes = nil
file_api_service_proto_api_proto_depIdxs = nil
}

110
api/service/proto/api.pb.micro.go
View File

@ -1,110 +0,0 @@
// Code generated by protoc-gen-micro. DO NOT EDIT.
// source: api/service/proto/api.proto
package go_micro_api
import (
fmt "fmt"
proto "github.com/golang/protobuf/proto"
math "math"
)
import (
context "context"
api "github.com/unistack-org/micro/v3/api"
client "github.com/unistack-org/micro/v3/client"
server "github.com/unistack-org/micro/v3/server"
)
// Reference imports to suppress errors if they are not otherwise used.
var _ = proto.Marshal
var _ = fmt.Errorf
var _ = math.Inf
// This is a compile-time assertion to ensure that this generated file
// is compatible with the proto package it is being compiled against.
// A compilation error at this line likely means your copy of the
// proto package needs to be updated.
const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
// Reference imports to suppress errors if they are not otherwise used.
var _ api.Endpoint
var _ context.Context
var _ client.Option
var _ server.Option
// Api Endpoints for Api service
func NewApiEndpoints() []*api.Endpoint {
return []*api.Endpoint{}
}
// Client API for Api service
type ApiService interface {
Register(ctx context.Context, in *Endpoint, opts ...client.CallOption) (*EmptyResponse, error)
Deregister(ctx context.Context, in *Endpoint, opts ...client.CallOption) (*EmptyResponse, error)
}
type apiService struct {
c client.Client
name string
}
func NewApiService(name string, c client.Client) ApiService {
return &apiService{
c: c,
name: name,
}
}
func (c *apiService) Register(ctx context.Context, in *Endpoint, opts ...client.CallOption) (*EmptyResponse, error) {
req := c.c.NewRequest(c.name, "Api.Register", in)
out := new(EmptyResponse)
err := c.c.Call(ctx, req, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *apiService) Deregister(ctx context.Context, in *Endpoint, opts ...client.CallOption) (*EmptyResponse, error) {
req := c.c.NewRequest(c.name, "Api.Deregister", in)
out := new(EmptyResponse)
err := c.c.Call(ctx, req, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
// Server API for Api service
type ApiHandler interface {
Register(context.Context, *Endpoint, *EmptyResponse) error
Deregister(context.Context, *Endpoint, *EmptyResponse) error
}
func RegisterApiHandler(s server.Server, hdlr ApiHandler, opts ...server.HandlerOption) error {
type api interface {
Register(ctx context.Context, in *Endpoint, out *EmptyResponse) error
Deregister(ctx context.Context, in *Endpoint, out *EmptyResponse) error
}
type Api struct {
api
}
h := &apiHandler{hdlr}
return s.Handle(s.NewHandler(&Api{h}, opts...))
}
type apiHandler struct {
ApiHandler
}
func (h *apiHandler) Register(ctx context.Context, in *Endpoint, out *EmptyResponse) error {
return h.ApiHandler.Register(ctx, in, out)
}
func (h *apiHandler) Deregister(ctx context.Context, in *Endpoint, out *EmptyResponse) error {
return h.ApiHandler.Deregister(ctx, in, out)
}

18
api/service/proto/api.proto
View File

@ -1,18 +0,0 @@
syntax = "proto3";
package go.micro.api;
service Api {
rpc Register(Endpoint) returns (EmptyResponse) {};
rpc Deregister(Endpoint) returns (EmptyResponse) {};
}
message Endpoint {
string name = 1;
repeated string host = 2;
repeated string path = 3;
repeated string method = 4;
bool stream = 5;
}
message EmptyResponse {}

126
api/service/proto/api_grpc.pb.go
View File

@ -1,126 +0,0 @@
// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
package go_micro_api
import (
context "context"
grpc "google.golang.org/grpc"
codes "google.golang.org/grpc/codes"
status "google.golang.org/grpc/status"
)
// This is a compile-time assertion to ensure that this generated file
// is compatible with the grpc package it is being compiled against.
const _ = grpc.SupportPackageIsVersion6
// ApiClient is the client API for Api service.
//
// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
type ApiClient interface {
Register(ctx context.Context, in *Endpoint, opts ...grpc.CallOption) (*EmptyResponse, error)
Deregister(ctx context.Context, in *Endpoint, opts ...grpc.CallOption) (*EmptyResponse, error)
}
type apiClient struct {
cc grpc.ClientConnInterface
}
func NewApiClient(cc grpc.ClientConnInterface) ApiClient {
return &apiClient{cc}
}
func (c *apiClient) Register(ctx context.Context, in *Endpoint, opts ...grpc.CallOption) (*EmptyResponse, error) {
out := new(EmptyResponse)
err := c.cc.Invoke(ctx, "/go.micro.api.Api/Register", in, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *apiClient) Deregister(ctx context.Context, in *Endpoint, opts ...grpc.CallOption) (*EmptyResponse, error) {
out := new(EmptyResponse)
err := c.cc.Invoke(ctx, "/go.micro.api.Api/Deregister", in, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
// ApiServer is the server API for Api service.
// All implementations must embed UnimplementedApiServer
// for forward compatibility
type ApiServer interface {
Register(context.Context, *Endpoint) (*EmptyResponse, error)
Deregister(context.Context, *Endpoint) (*EmptyResponse, error)
mustEmbedUnimplementedApiServer()
}
// UnimplementedApiServer must be embedded to have forward compatible implementations.
type UnimplementedApiServer struct {
}
func (*UnimplementedApiServer) Register(context.Context, *Endpoint) (*EmptyResponse, error) {
return nil, status.Errorf(codes.Unimplemented, "method Register not implemented")
}
func (*UnimplementedApiServer) Deregister(context.Context, *Endpoint) (*EmptyResponse, error) {
return nil, status.Errorf(codes.Unimplemented, "method Deregister not implemented")
}
func (*UnimplementedApiServer) mustEmbedUnimplementedApiServer() {}
func RegisterApiServer(s *grpc.Server, srv ApiServer) {
s.RegisterService(&_Api_serviceDesc, srv)
}
func _Api_Register_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(Endpoint)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(ApiServer).Register(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/go.micro.api.Api/Register",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(ApiServer).Register(ctx, req.(*Endpoint))
}
return interceptor(ctx, in, info, handler)
}
func _Api_Deregister_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(Endpoint)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(ApiServer).Deregister(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/go.micro.api.Api/Deregister",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(ApiServer).Deregister(ctx, req.(*Endpoint))
}
return interceptor(ctx, in, info, handler)
}
var _Api_serviceDesc = grpc.ServiceDesc{
ServiceName: "go.micro.api.Api",
HandlerType: (*ApiServer)(nil),
Methods: []grpc.MethodDesc{
{
MethodName: "Register",
Handler: _Api_Register_Handler,
},
{
MethodName: "Deregister",
Handler: _Api_Deregister_Handler,
},
},
Streams: []grpc.StreamDesc{},
Metadata: "api/service/proto/api.proto",
}

3
broker/broker.go
View File

@ -16,11 +16,10 @@ type Broker interface {
// Handler is used to process messages via a subscription of a topic.
type Handler func(*Message) error
type ErrorHandler func(*Message, error)
type Message struct {
Header map[string]string
Body []byte
Error error
}
// Subscriber is a convenience return type for the Subscribe method

689
broker/http/http.go
View File

@ -1,689 +0,0 @@
// Package http provides a http based message broker
package http
import (
"bytes"
"context"
"crypto/tls"
"errors"
"fmt"
"io"
"io/ioutil"
"math/rand"
"net"
"net/http"
"net/url"
"runtime"
"sync"
"time"
"github.com/google/uuid"
"github.com/unistack-org/micro/v3/broker"
"github.com/unistack-org/micro/v3/codec/json"
merr "github.com/unistack-org/micro/v3/errors"
"github.com/unistack-org/micro/v3/registry"
"github.com/unistack-org/micro/v3/registry/cache"
"github.com/unistack-org/micro/v3/registry/mdns"
maddr "github.com/unistack-org/micro/v3/util/addr"
mnet "github.com/unistack-org/micro/v3/util/net"
mls "github.com/unistack-org/micro/v3/util/tls"
"golang.org/x/net/http2"
)
// HTTP Broker is a point to point async broker
type httpBroker struct {
id string
address string
opts broker.Options
mux *http.ServeMux
c *http.Client
r registry.Registry
sync.RWMutex
subscribers map[string][]*httpSubscriber
running bool
exit chan chan error
// offline message inbox
mtx sync.RWMutex
inbox map[string][][]byte
}
type httpSubscriber struct {
opts broker.SubscribeOptions
id string
topic string
fn broker.Handler
svc *registry.Service
hb *httpBroker
}
var (
DefaultPath = "/"
DefaultAddress = "127.0.0.1:0"
serviceName = "micro.http.broker"
broadcastVersion = "ff.http.broadcast"
registerTTL = time.Minute
registerInterval = time.Second * 30
)
func init() {
rand.Seed(time.Now().Unix())
}
func newTransport(config *tls.Config) *http.Transport {
if config == nil {
config = &tls.Config{
InsecureSkipVerify: true,
}
}
dialTLS := func(network string, addr string) (net.Conn, error) {
return tls.Dial(network, addr, config)
}
t := &http.Transport{
Proxy: http.ProxyFromEnvironment,
Dial: (&net.Dialer{
Timeout: 30 * time.Second,
KeepAlive: 30 * time.Second,
}).Dial,
TLSHandshakeTimeout: 10 * time.Second,
DialTLS: dialTLS,
}
runtime.SetFinalizer(&t, func(tr **http.Transport) {
(*tr).CloseIdleConnections()
})
// setup http2
http2.ConfigureTransport(t)
return t
}
func newHttpBroker(opts ...broker.Option) broker.Broker {
options := broker.Options{
Codec: json.Marshaler{},
Context: context.TODO(),
Registry: mdns.NewRegistry(),
}
for _, o := range opts {
o(&options)
}
// set address
addr := DefaultAddress
if len(options.Addrs) > 0 && len(options.Addrs[0]) > 0 {
addr = options.Addrs[0]
}
h := &httpBroker{
id: uuid.New().String(),
address: addr,
opts: options,
r: options.Registry,
c: &http.Client{Transport: newTransport(options.TLSConfig)},
subscribers: make(map[string][]*httpSubscriber),
exit: make(chan chan error),
mux: http.NewServeMux(),
inbox: make(map[string][][]byte),
}
// specify the message handler
h.mux.Handle(DefaultPath, h)
// get optional handlers
if h.opts.Context != nil {
handlers, ok := h.opts.Context.Value("http_handlers").(map[string]http.Handler)
if ok {
for pattern, handler := range handlers {
h.mux.Handle(pattern, handler)
}
}
}
return h
}
func (h *httpSubscriber) Options() broker.SubscribeOptions {
return h.opts
}
func (h *httpSubscriber) Topic() string {
return h.topic
}
func (h *httpSubscriber) Unsubscribe() error {
return h.hb.unsubscribe(h)
}
func (h *httpBroker) saveMessage(topic string, msg []byte) {
h.mtx.Lock()
defer h.mtx.Unlock()
// get messages
c := h.inbox[topic]
// save message
c = append(c, msg)
// max length 64
if len(c) > 64 {
c = c[:64]
}
// save inbox
h.inbox[topic] = c
}
func (h *httpBroker) getMessage(topic string, num int) [][]byte {
h.mtx.Lock()
defer h.mtx.Unlock()
// get messages
c, ok := h.inbox[topic]
if !ok {
return nil
}
// more message than requests
if len(c) >= num {
msg := c[:num]
h.inbox[topic] = c[num:]
return msg
}
// reset inbox
h.inbox[topic] = nil
// return all messages
return c
}
func (h *httpBroker) subscribe(s *httpSubscriber) error {
h.Lock()
defer h.Unlock()
if err := h.r.Register(s.svc, registry.RegisterTTL(registerTTL)); err != nil {
return err
}
h.subscribers[s.topic] = append(h.subscribers[s.topic], s)
return nil
}
func (h *httpBroker) unsubscribe(s *httpSubscriber) error {
h.Lock()
defer h.Unlock()
//nolint:prealloc
var subscribers []*httpSubscriber
// look for subscriber
for _, sub := range h.subscribers[s.topic] {
// deregister and skip forward
if sub == s {
_ = h.r.Deregister(sub.svc)
continue
}
// keep subscriber
subscribers = append(subscribers, sub)
}
// set subscribers
h.subscribers[s.topic] = subscribers
return nil
}
func (h *httpBroker) run(l net.Listener) {
t := time.NewTicker(registerInterval)
defer t.Stop()
for {
select {
// heartbeat for each subscriber
case <-t.C:
h.RLock()
for _, subs := range h.subscribers {
for _, sub := range subs {
_ = h.r.Register(sub.svc, registry.RegisterTTL(registerTTL))
}
}
h.RUnlock()
// received exit signal
case ch := <-h.exit:
ch <- l.Close()
h.RLock()
for _, subs := range h.subscribers {
for _, sub := range subs {
_ = h.r.Deregister(sub.svc)
}
}
h.RUnlock()
return
}
}
}
func (h *httpBroker) ServeHTTP(w http.ResponseWriter, req *http.Request) {
if req.Method != "POST" {
err := merr.BadRequest("go.micro.broker", "Method not allowed")
http.Error(w, err.Error(), http.StatusMethodNotAllowed)
return
}
defer req.Body.Close()
req.ParseForm()
b, err := ioutil.ReadAll(req.Body)
if err != nil {
errr := merr.InternalServerError("go.micro.broker", "Error reading request body: %v", err)
w.WriteHeader(500)
w.Write([]byte(errr.Error()))
return
}
var msg *broker.Message
if err = h.opts.Codec.Unmarshal(b, &msg); err != nil {
errr := merr.InternalServerError("go.micro.broker", "Error parsing request body: %v", err)
w.WriteHeader(500)
w.Write([]byte(errr.Error()))
return
}
topic := msg.Header["Micro-Topic"]
if len(topic) == 0 {
errr := merr.InternalServerError("go.micro.broker", "Topic not found")
w.WriteHeader(500)
w.Write([]byte(errr.Error()))
return
}
id := req.Form.Get("id")
//nolint:prealloc
var subs []broker.Handler
h.RLock()
for _, subscriber := range h.subscribers[topic] {
if id != subscriber.id {
continue
}
subs = append(subs, subscriber.fn)
}
h.RUnlock()
// execute the handler
for _, fn := range subs {
fn(msg)
}
}
func (h *httpBroker) Address() string {
h.RLock()
defer h.RUnlock()
return h.address
}
func (h *httpBroker) Connect() error {
h.RLock()
if h.running {
h.RUnlock()
return nil
}
h.RUnlock()
h.Lock()
defer h.Unlock()
var l net.Listener
var err error
if h.opts.Secure || h.opts.TLSConfig != nil {
config := h.opts.TLSConfig
fn := func(addr string) (net.Listener, error) {
if config == nil {
hosts := []string{addr}
// check if its a valid host:port
if host, _, err := net.SplitHostPort(addr); err == nil {
if len(host) == 0 {
hosts = maddr.IPs()
} else {
hosts = []string{host}
}
}
// generate a certificate
cert, err := mls.Certificate(hosts...)
if err != nil {
return nil, err
}
config = &tls.Config{Certificates: []tls.Certificate{cert}}
}
return tls.Listen("tcp", addr, config)
}
l, err = mnet.Listen(h.address, fn)
} else {
fn := func(addr string) (net.Listener, error) {
return net.Listen("tcp", addr)
}
l, err = mnet.Listen(h.address, fn)
}
if err != nil {
return err
}
addr := h.address
h.address = l.Addr().String()
go http.Serve(l, h.mux)
go func() {
h.run(l)
h.Lock()
h.opts.Addrs = []string{addr}
h.address = addr
h.Unlock()
}()
// get registry
reg := h.opts.Registry
if reg == nil {
reg = mdns.NewRegistry()
}
// set cache
h.r = cache.New(reg)
// set running
h.running = true
return nil
}
func (h *httpBroker) Disconnect() error {
h.RLock()
if !h.running {
h.RUnlock()
return nil
}
h.RUnlock()
h.Lock()
defer h.Unlock()
// stop cache
rc, ok := h.r.(cache.Cache)
if ok {
rc.Stop()
}
// exit and return err
ch := make(chan error)
h.exit <- ch
err := <-ch
// set not running
h.running = false
return err
}
func (h *httpBroker) Init(opts ...broker.Option) error {
h.RLock()
if h.running {
h.RUnlock()
return errors.New("cannot init while connected")
}
h.RUnlock()
h.Lock()
defer h.Unlock()
for _, o := range opts {
o(&h.opts)
}
if len(h.opts.Addrs) > 0 && len(h.opts.Addrs[0]) > 0 {
h.address = h.opts.Addrs[0]
}
if len(h.id) == 0 {
h.id = "go.micro.http.broker-" + uuid.New().String()
}
// get registry
reg := h.opts.Registry
if reg == nil {
reg = mdns.NewRegistry()
}
// get cache
if rc, ok := h.r.(cache.Cache); ok {
rc.Stop()
}
// set registry
h.r = cache.New(reg)
// reconfigure tls config
if c := h.opts.TLSConfig; c != nil {
h.c = &http.Client{
Transport: newTransport(c),
}
}
return nil
}
func (h *httpBroker) Options() broker.Options {
return h.opts
}
func (h *httpBroker) Publish(topic string, msg *broker.Message, opts ...broker.PublishOption) error {
// create the message first
m := &broker.Message{
Header: make(map[string]string),
Body: msg.Body,
}
for k, v := range msg.Header {
m.Header[k] = v
}
m.Header["Micro-Topic"] = topic
// encode the message
b, err := h.opts.Codec.Marshal(m)
if err != nil {
return err
}
// save the message
h.saveMessage(topic, b)
// now attempt to get the service
h.RLock()
s, err := h.r.GetService(serviceName)
if err != nil {
h.RUnlock()
return err
}
h.RUnlock()
pub := func(node *registry.Node, t string, b []byte) error {
scheme := "http"
// check if secure is added in metadata
if node.Metadata["secure"] == "true" {
scheme = "https"
}
vals := url.Values{}
vals.Add("id", node.Id)
uri := fmt.Sprintf("%s://%s%s?%s", scheme, node.Address, DefaultPath, vals.Encode())
r, err := h.c.Post(uri, "application/json", bytes.NewReader(b))
if err != nil {
return err
}
// discard response body
io.Copy(ioutil.Discard, r.Body)
r.Body.Close()
return nil
}
srv := func(s []*registry.Service, b []byte) {
for _, service := range s {
var nodes []*registry.Node
for _, node := range service.Nodes {
// only use nodes tagged with broker http
if node.Metadata["broker"] != "http" {
continue
}
// look for nodes for the topic
if node.Metadata["topic"] != topic {
continue
}
nodes = append(nodes, node)
}
// only process if we have nodes
if len(nodes) == 0 {
continue
}
switch service.Version {
// broadcast version means broadcast to all nodes
case broadcastVersion:
var success bool
// publish to all nodes
for _, node := range nodes {
// publish async
if err := pub(node, topic, b); err == nil {
success = true
}
}
// save if it failed to publish at least once
if !success {
h.saveMessage(topic, b)
}
default:
// select node to publish to
node := nodes[rand.Int()%len(nodes)]
// publish async to one node
if err := pub(node, topic, b); err != nil {
// if failed save it
h.saveMessage(topic, b)
}
}
}
}
// do the rest async
go func() {
// get a third of the backlog
messages := h.getMessage(topic, 8)
delay := (len(messages) > 1)
// publish all the messages
for _, msg := range messages {
// serialize here
srv(s, msg)
// sending a backlog of messages
if delay {
time.Sleep(time.Millisecond * 100)
}
}
}()
return nil
}
func (h *httpBroker) Subscribe(topic string, handler broker.Handler, opts ...broker.SubscribeOption) (broker.Subscriber, error) {
var err error
var host, port string
options := broker.NewSubscribeOptions(opts...)
// parse address for host, port
host, port, err = net.SplitHostPort(h.Address())
if err != nil {
return nil, err
}
addr, err := maddr.Extract(host)
if err != nil {
return nil, err
}
var secure bool
if h.opts.Secure || h.opts.TLSConfig != nil {
secure = true
}
// register service
node := &registry.Node{
Id: topic + "-" + h.id,
Address: mnet.HostPort(addr, port),
Metadata: map[string]string{
"secure": fmt.Sprintf("%t", secure),
"broker": "http",
"topic": topic,
},
}
// check for queue group or broadcast queue
version := options.Queue
if len(version) == 0 {
version = broadcastVersion
}
service := &registry.Service{
Name: serviceName,
Version: version,
Nodes: []*registry.Node{node},
}
// generate subscriber
subscriber := &httpSubscriber{
opts: options,
hb: h,
id: node.Id,
topic: topic,
fn: handler,
svc: service,
}
// subscribe now
if err := h.subscribe(subscriber); err != nil {
return nil, err
}
// return the subscriber
return subscriber, nil
}
func (h *httpBroker) String() string {
return "http"
}
// NewBroker returns a new http broker
func NewBroker(opts ...broker.Option) broker.Broker {
return newHttpBroker(opts...)
}

377
broker/http/http_test.go
View File

@ -1,377 +0,0 @@
package http
import (
"sync"
"testing"
"time"
"github.com/google/uuid"
"github.com/unistack-org/micro/v3/broker"
"github.com/unistack-org/micro/v3/registry"
"github.com/unistack-org/micro/v3/registry/memory"
)
var (
// mock data
testData = map[string][]*registry.Service{
"foo": {
{
Name: "foo",
Version: "1.0.0",
Nodes: []*registry.Node{
{
Id: "foo-1.0.0-123",
Address: "localhost:9999",
},
{
Id: "foo-1.0.0-321",
Address: "localhost:9999",
},
},
},
{
Name: "foo",
Version: "1.0.1",
Nodes: []*registry.Node{
{
Id: "foo-1.0.1-321",
Address: "localhost:6666",
},
},
},
{
Name: "foo",
Version: "1.0.3",
Nodes: []*registry.Node{
{
Id: "foo-1.0.3-345",
Address: "localhost:8888",
},
},
},
},
}
)
func newTestRegistry() registry.Registry {
return memory.NewRegistry(memory.Services(testData))
}
func sub(be *testing.B, c int) {
be.StopTimer()
m := newTestRegistry()
b := NewBroker(broker.Registry(m))
topic := uuid.New().String()
if err := b.Init(); err != nil {
be.Fatalf("Unexpected init error: %v", err)
}
if err := b.Connect(); err != nil {
be.Fatalf("Unexpected connect error: %v", err)
}
msg := &broker.Message{
Header: map[string]string{
"Content-Type": "application/json",
},
Body: []byte(`{"message": "Hello World"}`),
}
var subs []broker.Subscriber
done := make(chan bool, c)
for i := 0; i < c; i++ {
sub, err := b.Subscribe(topic, func(m *broker.Message) error {
done <- true
if string(m.Body) != string(msg.Body) {
be.Fatalf("Unexpected msg %s, expected %s", string(m.Body), string(msg.Body))
}
return nil
}, broker.Queue("shared"))
if err != nil {
be.Fatalf("Unexpected subscribe error: %v", err)
}
subs = append(subs, sub)
}
for i := 0; i < be.N; i++ {
be.StartTimer()
if err := b.Publish(topic, msg); err != nil {
be.Fatalf("Unexpected publish error: %v", err)
}
<-done
be.StopTimer()
}
for _, sub := range subs {
sub.Unsubscribe()
}
if err := b.Disconnect(); err != nil {
be.Fatalf("Unexpected disconnect error: %v", err)
}
}
func pub(be *testing.B, c int) {
be.StopTimer()
m := newTestRegistry()
b := NewBroker(broker.Registry(m))
topic := uuid.New().String()
if err := b.Init(); err != nil {
be.Fatalf("Unexpected init error: %v", err)
}
if err := b.Connect(); err != nil {
be.Fatalf("Unexpected connect error: %v", err)
}
msg := &broker.Message{
Header: map[string]string{
"Content-Type": "application/json",
},
Body: []byte(`{"message": "Hello World"}`),
}
done := make(chan bool, c*4)
sub, err := b.Subscribe(topic, func(m *broker.Message) error {
done <- true
if string(m.Body) != string(msg.Body) {
be.Fatalf("Unexpected msg %s, expected %s", string(m.Body), string(msg.Body))
}
return nil
}, broker.Queue("shared"))
if err != nil {
be.Fatalf("Unexpected subscribe error: %v", err)
}
var wg sync.WaitGroup
ch := make(chan int, c*4)
be.StartTimer()
for i := 0; i < c; i++ {
go func() {
for range ch {
if err := b.Publish(topic, msg); err != nil {
be.Fatalf("Unexpected publish error: %v", err)
}
select {
case <-done:
case <-time.After(time.Second):
}
wg.Done()
}
}()
}
for i := 0; i < be.N; i++ {
wg.Add(1)
ch <- i
}
wg.Wait()
be.StopTimer()
sub.Unsubscribe()
close(ch)
close(done)
if err := b.Disconnect(); err != nil {
be.Fatalf("Unexpected disconnect error: %v", err)
}
}
func TestBroker(t *testing.T) {
m := newTestRegistry()
b := NewBroker(broker.Registry(m))
if err := b.Init(); err != nil {
t.Fatalf("Unexpected init error: %v", err)
}
if err := b.Connect(); err != nil {
t.Fatalf("Unexpected connect error: %v", err)
}
msg := &broker.Message{
Header: map[string]string{
"Content-Type": "application/json",
},
Body: []byte(`{"message": "Hello World"}`),
}
done := make(chan bool)
sub, err := b.Subscribe("test", func(m *broker.Message) error {
if string(m.Body) != string(msg.Body) {
t.Fatalf("Unexpected msg %s, expected %s", string(m.Body), string(msg.Body))
}
close(done)
return nil
})
if err != nil {
t.Fatalf("Unexpected subscribe error: %v", err)
}
if err := b.Publish("test", msg); err != nil {
t.Fatalf("Unexpected publish error: %v", err)
}
<-done
sub.Unsubscribe()
if err := b.Disconnect(); err != nil {
t.Fatalf("Unexpected disconnect error: %v", err)
}
}
func TestConcurrentSubBroker(t *testing.T) {
m := newTestRegistry()
b := NewBroker(broker.Registry(m))
if err := b.Init(); err != nil {
t.Fatalf("Unexpected init error: %v", err)
}
if err := b.Connect(); err != nil {
t.Fatalf("Unexpected connect error: %v", err)
}
msg := &broker.Message{
Header: map[string]string{
"Content-Type": "application/json",
},
Body: []byte(`{"message": "Hello World"}`),
}
var subs []broker.Subscriber
var wg sync.WaitGroup
for i := 0; i < 10; i++ {
sub, err := b.Subscribe("test", func(m *broker.Message) error {
defer wg.Done()
if string(m.Body) != string(msg.Body) {
t.Fatalf("Unexpected msg %s, expected %s", string(m.Body), string(msg.Body))
}
return nil
})
if err != nil {
t.Fatalf("Unexpected subscribe error: %v", err)
}
wg.Add(1)
subs = append(subs, sub)
}
if err := b.Publish("test", msg); err != nil {
t.Fatalf("Unexpected publish error: %v", err)
}
wg.Wait()
for _, sub := range subs {
sub.Unsubscribe()
}
if err := b.Disconnect(); err != nil {
t.Fatalf("Unexpected disconnect error: %v", err)
}
}
func TestConcurrentPubBroker(t *testing.T) {
m := newTestRegistry()
b := NewBroker(broker.Registry(m))
if err := b.Init(); err != nil {
t.Fatalf("Unexpected init error: %v", err)
}
if err := b.Connect(); err != nil {
t.Fatalf("Unexpected connect error: %v", err)
}
msg := &broker.Message{
Header: map[string]string{
"Content-Type": "application/json",
},
Body: []byte(`{"message": "Hello World"}`),
}
var wg sync.WaitGroup
sub, err := b.Subscribe("test", func(m *broker.Message) error {
defer wg.Done()
if string(m.Body) != string(msg.Body) {
t.Fatalf("Unexpected msg %s, expected %s", string(m.Body), string(msg.Body))
}
return nil
})
if err != nil {
t.Fatalf("Unexpected subscribe error: %v", err)
}
for i := 0; i < 10; i++ {
wg.Add(1)
if err := b.Publish("test", msg); err != nil {
t.Fatalf("Unexpected publish error: %v", err)
}
}
wg.Wait()
sub.Unsubscribe()
if err := b.Disconnect(); err != nil {
t.Fatalf("Unexpected disconnect error: %v", err)
}
}
func BenchmarkSub1(b *testing.B) {
sub(b, 1)
}
func BenchmarkSub8(b *testing.B) {
sub(b, 8)
}
func BenchmarkSub32(b *testing.B) {
sub(b, 32)
}
func BenchmarkSub64(b *testing.B) {
sub(b, 64)
}
func BenchmarkSub128(b *testing.B) {
sub(b, 128)
}
func BenchmarkPub1(b *testing.B) {
pub(b, 1)
}
func BenchmarkPub8(b *testing.B) {
pub(b, 8)
}
func BenchmarkPub32(b *testing.B) {
pub(b, 32)
}
func BenchmarkPub64(b *testing.B) {
pub(b, 64)
}
func BenchmarkPub128(b *testing.B) {
pub(b, 128)
}

23
broker/http/options.go
View File

@ -1,23 +0,0 @@
package http
import (
"context"
"net/http"
"github.com/unistack-org/micro/v3/broker"
)
// Handle registers the handler for the given pattern.
func Handle(pattern string, handler http.Handler) broker.Option {
return func(o *broker.Options) {
if o.Context == nil {
o.Context = context.Background()
}
handlers, ok := o.Context.Value("http_handlers").(map[string]http.Handler)
if !ok {
handlers = make(map[string]http.Handler)
}
handlers[pattern] = handler
o.Context = context.WithValue(o.Context, "http_handlers", handlers)
}
}

183
broker/memory/memory.go
View File

@ -1,183 +0,0 @@
// Package memory provides a memory broker
package memory
import (
"context"
"errors"
"math/rand"
"sync"
"time"
"github.com/google/uuid"
"github.com/unistack-org/micro/v3/broker"
maddr "github.com/unistack-org/micro/v3/util/addr"
mnet "github.com/unistack-org/micro/v3/util/net"
)
type memoryBroker struct {
opts broker.Options
addr string
sync.RWMutex
connected bool
Subscribers map[string][]*memorySubscriber
}
type memorySubscriber struct {
id string
topic string
exit chan bool
handler broker.Handler
opts broker.SubscribeOptions
}
func (m *memoryBroker) Options() broker.Options {
return m.opts
}
func (m *memoryBroker) Address() string {
return m.addr
}
func (m *memoryBroker) Connect() error {
m.Lock()
defer m.Unlock()
if m.connected {
return nil
}
// use 127.0.0.1 to avoid scan of all network interfaces
addr, err := maddr.Extract("127.0.0.1")
if err != nil {
return err
}
i := rand.Intn(20000)
// set addr with port
addr = mnet.HostPort(addr, 10000+i)
m.addr = addr
m.connected = true
return nil
}
func (m *memoryBroker) Disconnect() error {
m.Lock()
defer m.Unlock()
if !m.connected {
return nil
}
m.connected = false
return nil
}
func (m *memoryBroker) Init(opts ...broker.Option) error {
for _, o := range opts {
o(&m.opts)
}
return nil
}
func (m *memoryBroker) Publish(topic string, msg *broker.Message, opts ...broker.PublishOption) error {
m.RLock()
if !m.connected {
m.RUnlock()
return errors.New("not connected")
}
subs, ok := m.Subscribers[topic]
m.RUnlock()
if !ok {
return nil
}
for _, sub := range subs {
if err := sub.handler(msg); err != nil {
if eh := sub.opts.ErrorHandler; eh != nil {
eh(msg, err)
}
continue
}
}
return nil
}
func (m *memoryBroker) Subscribe(topic string, handler broker.Handler, opts ...broker.SubscribeOption) (broker.Subscriber, error) {
m.RLock()
if !m.connected {
m.RUnlock()
return nil, errors.New("not connected")
}
m.RUnlock()
var options broker.SubscribeOptions
for _, o := range opts {
o(&options)
}
sub := &memorySubscriber{
exit: make(chan bool, 1),
id: uuid.New().String(),
topic: topic,
handler: handler,
opts: options,
}
m.Lock()
m.Subscribers[topic] = append(m.Subscribers[topic], sub)
m.Unlock()
go func() {
<-sub.exit
m.Lock()
var newSubscribers []*memorySubscriber
for _, sb := range m.Subscribers[topic] {
if sb.id == sub.id {
continue
}
newSubscribers = append(newSubscribers, sb)
}
m.Subscribers[topic] = newSubscribers
m.Unlock()
}()
return sub, nil
}
func (m *memoryBroker) String() string {
return "memory"
}
func (m *memorySubscriber) Options() broker.SubscribeOptions {
return m.opts
}
func (m *memorySubscriber) Topic() string {
return m.topic
}
func (m *memorySubscriber) Unsubscribe() error {
m.exit <- true
return nil
}
func NewBroker(opts ...broker.Option) broker.Broker {
options := broker.Options{
Context: context.Background(),
}
rand.Seed(time.Now().UnixNano())
for _, o := range opts {
o(&options)
}
return &memoryBroker{
opts: options,
Subscribers: make(map[string][]*memorySubscriber),
}
}

50
broker/memory/memory_test.go
View File

@ -1,50 +0,0 @@
package memory
import (
"fmt"
"testing"
"github.com/unistack-org/micro/v3/broker"
)
func TestMemoryBroker(t *testing.T) {
b := NewBroker()
if err := b.Connect(); err != nil {
t.Fatalf("Unexpected connect error %v", err)
}
topic := "test"
count := 10
fn := func(m *broker.Message) error {
return nil
}
sub, err := b.Subscribe(topic, fn)
if err != nil {
t.Fatalf("Unexpected error subscribing %v", err)
}
for i := 0; i < count; i++ {
message := &broker.Message{
Header: map[string]string{
"foo": "bar",
"id": fmt.Sprintf("%d", i),
},
Body: []byte(`hello world`),
}
if err := b.Publish(topic, message); err != nil {
t.Fatalf("Unexpected error publishing %d", i)
}
}
if err := sub.Unsubscribe(); err != nil {
t.Fatalf("Unexpected error unsubscribing from %s: %v", topic, err)
}
if err := b.Disconnect(); err != nil {
t.Fatalf("Unexpected connect error %v", err)
}
}

17
broker/nats/context.go
View File

@ -1,17 +0,0 @@
package nats
import (
"context"
"github.com/unistack-org/micro/v3/broker"
)
// setBrokerOption returns a function to setup a context with given value
func setBrokerOption(k, v interface{}) broker.Option {
return func(o *broker.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, k, v)
}
}

294
broker/nats/nats.go
View File

@ -1,294 +0,0 @@
// Package nats provides a NATS broker
package nats
import (
"context"
"errors"
"strings"
"sync"
nats "github.com/nats-io/nats.go"
"github.com/unistack-org/micro/v3/broker"
"github.com/unistack-org/micro/v3/codec/json"
"github.com/unistack-org/micro/v3/logger"
"github.com/unistack-org/micro/v3/registry/mdns"
)
type natsBroker struct {
sync.Once
sync.RWMutex
// indicate if we're connected
connected bool
addrs []string
conn *nats.Conn
opts broker.Options
nopts nats.Options
// should we drain the connection
drain bool
closeCh chan (error)
}
type subscriber struct {
s *nats.Subscription
opts broker.SubscribeOptions
}
func (s *subscriber) Options() broker.SubscribeOptions {
return s.opts
}
func (s *subscriber) Topic() string {
return s.s.Subject
}
func (s *subscriber) Unsubscribe() error {
return s.s.Unsubscribe()
}
func (n *natsBroker) Address() string {
if n.conn != nil && n.conn.IsConnected() {
return n.conn.ConnectedUrl()
}
if len(n.addrs) > 0 {
return n.addrs[0]
}
return ""
}
func (n *natsBroker) setAddrs(addrs []string) []string {
//nolint:prealloc
var cAddrs []string
for _, addr := range addrs {
if len(addr) == 0 {
continue
}
if !strings.HasPrefix(addr, "nats://") {
addr = "nats://" + addr
}
cAddrs = append(cAddrs, addr)
}
if len(cAddrs) == 0 {
cAddrs = []string{nats.DefaultURL}
}
return cAddrs
}
func (n *natsBroker) Connect() error {
n.Lock()
defer n.Unlock()
if n.connected {
return nil
}
status := nats.CLOSED
if n.conn != nil {
status = n.conn.Status()
}
switch status {
case nats.CONNECTED, nats.RECONNECTING, nats.CONNECTING:
n.connected = true
return nil
default: // DISCONNECTED or CLOSED or DRAINING
opts := n.nopts
opts.Servers = n.addrs
opts.Secure = n.opts.Secure
opts.TLSConfig = n.opts.TLSConfig
// secure might not be set
if n.opts.TLSConfig != nil {
opts.Secure = true
}
c, err := opts.Connect()
if err != nil {
if logger.V(logger.WarnLevel, logger.DefaultLogger) {
logger.Warnf("Error connecting to broker: %v", err)
}
return err
}
n.conn = c
n.connected = true
return nil
}
}
func (n *natsBroker) Disconnect() error {
n.Lock()
defer n.Unlock()
// drain the connection if specified
if n.drain {
n.conn.Drain()
n.closeCh <- nil
}
// close the client connection
n.conn.Close()
// set not connected
n.connected = false
return nil
}
func (n *natsBroker) Init(opts ...broker.Option) error {
n.setOption(opts...)
return nil
}
func (n *natsBroker) Options() broker.Options {
return n.opts
}
func (n *natsBroker) Publish(topic string, msg *broker.Message, opts ...broker.PublishOption) error {
n.RLock()
defer n.RUnlock()
if n.conn == nil {
return errors.New("not connected")
}
b, err := n.opts.Codec.Marshal(msg)
if err != nil {
return err
}
return n.conn.Publish(topic, b)
}
func (n *natsBroker) Subscribe(topic string, handler broker.Handler, opts ...broker.SubscribeOption) (broker.Subscriber, error) {
n.RLock()
if n.conn == nil {
n.RUnlock()
return nil, errors.New("not connected")
}
n.RUnlock()
opt := broker.SubscribeOptions{
Context: context.Background(),
}
for _, o := range opts {
o(&opt)
}
fn := func(msg *nats.Msg) {
var m *broker.Message
eh := opt.ErrorHandler
err := n.opts.Codec.Unmarshal(msg.Data, &m)
if err != nil {
m.Body = msg.Data
if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
logger.Error(err)
}
if eh != nil {
eh(m, err)
}
return
}
if err := handler(m); err != nil {
if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
logger.Error(err)
}
if eh != nil {
eh(m, err)
}
}
}
var sub *nats.Subscription
var err error
n.RLock()
if len(opt.Queue) > 0 {
sub, err = n.conn.QueueSubscribe(topic, opt.Queue, fn)
} else {
sub, err = n.conn.Subscribe(topic, fn)
}
n.RUnlock()
if err != nil {
return nil, err
}
return &subscriber{s: sub, opts: opt}, nil
}
func (n *natsBroker) String() string {
return "nats"
}
func (n *natsBroker) setOption(opts ...broker.Option) {
for _, o := range opts {
o(&n.opts)
}
n.Once.Do(func() {
n.nopts = nats.GetDefaultOptions()
})
if nopts, ok := n.opts.Context.Value(optionsKey{}).(nats.Options); ok {
n.nopts = nopts
}
// broker.Options have higher priority than nats.Options
// only if Addrs, Secure or TLSConfig were not set through a broker.Option
// we read them from nats.Option
if len(n.opts.Addrs) == 0 {
n.opts.Addrs = n.nopts.Servers
}
if !n.opts.Secure {
n.opts.Secure = n.nopts.Secure
}
if n.opts.TLSConfig == nil {
n.opts.TLSConfig = n.nopts.TLSConfig
}
n.addrs = n.setAddrs(n.opts.Addrs)
if n.opts.Context.Value(drainConnectionKey{}) != nil {
n.drain = true
n.closeCh = make(chan error)
n.nopts.ClosedCB = n.onClose
n.nopts.AsyncErrorCB = n.onAsyncError
n.nopts.DisconnectedErrCB = n.onDisconnectedError
}
}
func (n *natsBroker) onClose(conn *nats.Conn) {
n.closeCh <- nil
}
func (n *natsBroker) onAsyncError(conn *nats.Conn, sub *nats.Subscription, err error) {
// There are kinds of different async error nats might callback, but we are interested
// in ErrDrainTimeout only here.
if err == nats.ErrDrainTimeout {
n.closeCh <- err
}
}
func (n *natsBroker) onDisconnectedError(conn *nats.Conn, err error) {
n.closeCh <- err
}
func NewBroker(opts ...broker.Option) broker.Broker {
options := broker.Options{
// Default codec
Codec: json.Marshaler{},
Context: context.Background(),
Registry: mdns.NewRegistry(),
}
n := &natsBroker{
opts: options,
}
n.setOption(opts...)
return n
}

98
broker/nats/nats_test.go
View File

@ -1,98 +0,0 @@
package nats
import (
"fmt"
"testing"
nats "github.com/nats-io/nats.go"
"github.com/unistack-org/micro/v3/broker"
)
var addrTestCases = []struct {
name string
description string
addrs map[string]string // expected address : set address
}{
{
"brokerOpts",
"set broker addresses through a broker.Option in constructor",
map[string]string{
"nats://192.168.10.1:5222": "192.168.10.1:5222",
"nats://10.20.10.0:4222": "10.20.10.0:4222"},
},
{
"brokerInit",
"set broker addresses through a broker.Option in broker.Init()",
map[string]string{
"nats://192.168.10.1:5222": "192.168.10.1:5222",
"nats://10.20.10.0:4222": "10.20.10.0:4222"},
},
{
"natsOpts",
"set broker addresses through the nats.Option in constructor",
map[string]string{
"nats://192.168.10.1:5222": "192.168.10.1:5222",
"nats://10.20.10.0:4222": "10.20.10.0:4222"},
},
{
"default",
"check if default Address is set correctly",
map[string]string{
"nats://127.0.0.1:4222": "",
},
},
}
// TestInitAddrs tests issue #100. Ensures that if the addrs is set by an option in init it will be used.
func TestInitAddrs(t *testing.T) {
for _, tc := range addrTestCases {
t.Run(fmt.Sprintf("%s: %s", tc.name, tc.description), func(t *testing.T) {
var br broker.Broker
var addrs []string
for _, addr := range tc.addrs {
addrs = append(addrs, addr)
}
switch tc.name {
case "brokerOpts":
// we know that there are just two addrs in the dict
br = NewBroker(broker.Addrs(addrs[0], addrs[1]))
br.Init()
case "brokerInit":
br = NewBroker()
// we know that there are just two addrs in the dict
br.Init(broker.Addrs(addrs[0], addrs[1]))
case "natsOpts":
nopts := nats.GetDefaultOptions()
nopts.Servers = addrs
br = NewBroker(Options(nopts))
br.Init()
case "default":
br = NewBroker()
br.Init()
}
natsBroker, ok := br.(*natsBroker)
if !ok {
t.Fatal("Expected broker to be of types *natsBroker")
}
// check if the same amount of addrs we set has actually been set, default
// have only 1 address nats://127.0.0.1:4222 (current nats code) or
// nats://localhost:4222 (older code version)
if len(natsBroker.addrs) != len(tc.addrs) && tc.name != "default" {
t.Errorf("Expected Addr count = %d, Actual Addr count = %d",
len(natsBroker.addrs), len(tc.addrs))
}
for _, addr := range natsBroker.addrs {
_, ok := tc.addrs[addr]
if !ok {
t.Errorf("Expected '%s' has not been set", addr)
}
}
})
}
}

19
broker/nats/options.go
View File

@ -1,19 +0,0 @@
package nats
import (
nats "github.com/nats-io/nats.go"
"github.com/unistack-org/micro/v3/broker"
)
type optionsKey struct{}
type drainConnectionKey struct{}
// Options accepts nats.Options
func Options(opts nats.Options) broker.Option {
return setBrokerOption(optionsKey{}, opts)
}
// DrainConnection will drain subscription on close
func DrainConnection() broker.Option {
return setBrokerOption(drainConnectionKey{}, struct{}{})
}

32
broker/options.go
View File

@ -9,10 +9,15 @@ import (
)
type Options struct {
AutoAck bool
Addrs []string
Secure bool
Codec codec.Marshaler
// Handler executed when errors occur processing messages
ErrorHandler Handler
TLSConfig *tls.Config
// Registry used for clustering
Registry registry.Registry
@ -28,13 +33,16 @@ type PublishOptions struct {
}
type SubscribeOptions struct {
// Handler executed when errors occur processing messages
ErrorHandler ErrorHandler
// AutoAck ack messages if handler returns nil err
AutoAck bool
// Subscribers with the same queue name
// Handler executed when errors occur processing messages
ErrorHandler Handler
// Subscribers with the same group name
// will create a shared subscription where each
// receives a subset of messages.
Queue string
Group string
// Other options for implementations of the interface
// can be stored in a context
@ -81,16 +89,24 @@ func Codec(c codec.Marshaler) Option {
// ErrorHandler will catch all broker errors that cant be handled
// in normal way, for example Codec errors
func HandleError(h ErrorHandler) SubscribeOption {
func ErrorHandler(h Handler) Option {
return func(o *Options) {
o.ErrorHandler = h
}
}
// SubscribeErrorHandler will catch all broker errors that cant be handled
// in normal way, for example Codec errors
func SubscribeErrorHandler(h Handler) SubscribeOption {
return func(o *SubscribeOptions) {
o.ErrorHandler = h
}
}
// Queue sets the name of the queue to share messages on
func Queue(name string) SubscribeOption {
// SubscribeGroup sets the name of the queue to share messages on
func SubscribeGroup(name string) SubscribeOption {
return func(o *SubscribeOptions) {
o.Queue = name
o.Group = name
}
}

96
build/docker/docker.go
View File

@ -1,96 +0,0 @@
// Package docker builds docker images
package docker
import (
"archive/tar"
"bytes"
"io/ioutil"
"os"
"path/filepath"
docker "github.com/fsouza/go-dockerclient"
"github.com/unistack-org/micro/v3/build"
"github.com/unistack-org/micro/v3/logger"
)
type dockerBuild struct {
Options build.Options
Client *docker.Client
}
func (d *dockerBuild) Package(name string, s *build.Source) (*build.Package, error) {
image := name
buf := new(bytes.Buffer)
tw := tar.NewWriter(buf)
defer tw.Close()
dockerFile := "Dockerfile"
// open docker file
f, err := os.Open(filepath.Join(s.Path, dockerFile))
if err != nil {
return nil, err
}
// read docker file
by, err := ioutil.ReadAll(f)
if err != nil {
return nil, err
}
tarHeader := &tar.Header{
Name: dockerFile,
Size: int64(len(by)),
}
err = tw.WriteHeader(tarHeader)
if err != nil {
return nil, err
}
_, err = tw.Write(by)
if err != nil {
return nil, err
}
tr := bytes.NewReader(buf.Bytes())
err = d.Client.BuildImage(docker.BuildImageOptions{
Name: image,
Dockerfile: dockerFile,
InputStream: tr,
OutputStream: ioutil.Discard,
RmTmpContainer: true,
SuppressOutput: true,
})
if err != nil {
return nil, err
}
return &build.Package{
Name: image,
Path: image,
Type: "docker",
Source: s,
}, nil
}
func (d *dockerBuild) Remove(b *build.Package) error {
return d.Client.RemoveImage(b.Name)
}
func (d *dockerBuild) String() string {
return "docker"
}
func NewBuild(opts ...build.Option) build.Build {
options := build.Options{}
for _, o := range opts {
o(&options)
}
endpoint := "unix:///var/run/docker.sock"
client, err := docker.NewClient(endpoint)
if err != nil {
logger.Fatal(err)
}
return &dockerBuild{
Options: options,
Client: client,
}
}

75
build/golang/golang.go
View File

@ -1,75 +0,0 @@
// Package golang is a go package manager
package golang
import (
"os"
"os/exec"
"path/filepath"
"github.com/unistack-org/micro/v3/build"
)
type goBuild struct {
Options build.Options
Cmd string
Path string
}
// whichGo locates the go command
func whichGo() string {
// check GOROOT
if gr := os.Getenv("GOROOT"); len(gr) > 0 {
return filepath.Join(gr, "bin", "go")
}
// check path
for _, p := range filepath.SplitList(os.Getenv("PATH")) {
bin := filepath.Join(p, "go")
if _, err := os.Stat(bin); err == nil {
return bin
}
}
// best effort
return "go"
}
func (g *goBuild) Package(name string, src *build.Source) (*build.Package, error) {
binary := filepath.Join(g.Path, name)
source := src.Path
cmd := exec.Command(g.Cmd, "build", "-o", binary, source)
if err := cmd.Run(); err != nil {
return nil, err
}
return &build.Package{
Name: name,
Path: binary,
Type: g.String(),
Source: src,
}, nil
}
func (g *goBuild) Remove(b *build.Package) error {
binary := filepath.Join(b.Path, b.Name)
return os.Remove(binary)
}
func (g *goBuild) String() string {
return "golang"
}
func NewBuild(opts ...build.Option) build.Build {
options := build.Options{
Path: os.TempDir(),
}
for _, o := range opts {
o(&options)
}
return &goBuild{
Options: options,
Cmd: whichGo(),
Path: options.Path,
}
}

45
build/tar/tar.go
View File

@ -1,45 +0,0 @@
// Package tar basically tarballs source code
package tar
import (
"os"
"path/filepath"
"github.com/unistack-org/micro/v3/build"
)
type tarBuild struct{}
func (t *tarBuild) Package(name string, src *build.Source) (*build.Package, error) {
pkg := name + ".tar.gz"
// path to the tarball
path := filepath.Join(os.TempDir(), src.Path, pkg)
// create a temp directory
if err := os.MkdirAll(filepath.Join(os.TempDir(), src.Path), 0755); err != nil {
return nil, err
}
if err := Compress(src.Path, path); err != nil {
return nil, err
}
return &build.Package{
Name: name,
Path: path,
Type: t.String(),
Source: src,
}, nil
}
func (t *tarBuild) Remove(b *build.Package) error {
return os.Remove(b.Path)
}
func (t *tarBuild) String() string {
return "tar.gz"
}
func NewBuild(opts ...build.Option) build.Build {
return new(tarBuild)
}

92
build/tar/util.go
View File

@ -1,92 +0,0 @@
package tar
import (
"archive/tar"
"bytes"
"compress/gzip"
"io"
"os"
"path/filepath"
"strings"
)
func Compress(source, dest string) error {
// tar + gzip
var buf bytes.Buffer
_ = compress(source, &buf)
// write the .tar.gzip
fileToWrite, err := os.OpenFile(dest, os.O_CREATE|os.O_RDWR, 0666)
if err != nil {
return err
}
_, err = io.Copy(fileToWrite, &buf)
return err
}
func compress(src string, buf io.Writer) error {
// tar > gzip > buf
zr := gzip.NewWriter(buf)
tw := tar.NewWriter(zr)
// walk through every file in the folder
filepath.Walk(src, func(file string, fi os.FileInfo, err error) error {
// generate tar header
header, err := tar.FileInfoHeader(fi, file)
if err != nil {
return err
}
// must provide real name
// (see https://golang.org/src/archive/tar/common.go?#L626)
srcWithSlash := src
if !strings.HasSuffix(src, string(filepath.Separator)) {
srcWithSlash = src + string(filepath.Separator)
}
header.Name = strings.ReplaceAll(file, srcWithSlash, "")
if header.Name == src || len(strings.TrimSpace(header.Name)) == 0 {
return nil
}
// @todo This is a quick hack to speed up whole repo uploads
// https://github.com/micro/micro/pull/956
if !fi.IsDir() && !strings.HasSuffix(header.Name, ".go") &&
!strings.HasSuffix(header.Name, ".mod") &&
!strings.HasSuffix(header.Name, ".sum") {
return nil
}
// write header
if err := tw.WriteHeader(header); err != nil {
return err
}
if fi.IsDir() {
return nil
}
// if not a dir, write file content
data, err := os.Open(file)
if err != nil {
return err
}
if _, err := io.Copy(tw, data); err != nil {
return err
}
return nil
})
// produce tar
if err := tw.Close(); err != nil {
return err
}
// produce gzip
if err := zr.Close(); err != nil {
return err
}
//
return nil
}

25
client/grpc/README.md
View File

@ -1,25 +0,0 @@
# GRPC Client
The grpc client is a [micro.Client](https://godoc.org/github.com/micro/go-micro/client#Client) compatible client.
## Overview
The client makes use of the [google.golang.org/grpc](google.golang.org/grpc) framework for the underlying communication mechanism.
## Usage
Specify the client to your micro service
```go
import (
"github.com/micro/go-micro"
"github.com/micro/go-plugins/client/grpc"
)
func main() {
service := micro.NewService(
micro.Name("greeter"),
micro.Client(grpc.NewClient()),
)
}
```

206
client/grpc/codec.go
View File

@ -1,206 +0,0 @@
package grpc
import (
"encoding/json"
"fmt"
"strings"
b "bytes"
"github.com/golang/protobuf/jsonpb"
"github.com/golang/protobuf/proto"
"github.com/oxtoacart/bpool"
"github.com/unistack-org/micro/v3/codec"
"github.com/unistack-org/micro/v3/codec/bytes"
"google.golang.org/grpc"
"google.golang.org/grpc/encoding"
)
type jsonCodec struct{}
type protoCodec struct{}
type bytesCodec struct{}
type wrapCodec struct{ encoding.Codec }
var jsonpbMarshaler = &jsonpb.Marshaler{}
var useNumber bool
// create buffer pool with 16 instances each preallocated with 256 bytes
var bufferPool = bpool.NewSizedBufferPool(16, 256)
var (
defaultGRPCCodecs = map[string]encoding.Codec{
"application/json": jsonCodec{},
"application/proto": protoCodec{},
"application/protobuf": protoCodec{},
"application/octet-stream": protoCodec{},
"application/grpc": protoCodec{},
"application/grpc+json": jsonCodec{},
"application/grpc+proto": protoCodec{},
"application/grpc+bytes": bytesCodec{},
}
)
// UseNumber fix unmarshal Number(8234567890123456789) to interface(8.234567890123457e+18)
func UseNumber() {
useNumber = true
}
func (w wrapCodec) String() string {
return w.Codec.Name()
}
func (w wrapCodec) Marshal(v interface{}) ([]byte, error) {
b, ok := v.(*bytes.Frame)
if ok {
return b.Data, nil
}
return w.Codec.Marshal(v)
}
func (w wrapCodec) Unmarshal(data []byte, v interface{}) error {
b, ok := v.(*bytes.Frame)
if ok {
b.Data = data
return nil
}
return w.Codec.Unmarshal(data, v)
}
func (protoCodec) Marshal(v interface{}) ([]byte, error) {
switch m := v.(type) {
case *bytes.Frame:
return m.Data, nil
case proto.Message:
return proto.Marshal(m)
}
return nil, fmt.Errorf("failed to marshal: %v is not type of *bytes.Frame or proto.Message", v)
}
func (protoCodec) Unmarshal(data []byte, v interface{}) error {
m, ok := v.(proto.Message)
if !ok {
return fmt.Errorf("failed to unmarshal: %v is not type of proto.Message", v)
}
return proto.Unmarshal(data, m)
}
func (protoCodec) Name() string {
return "proto"
}
func (bytesCodec) Marshal(v interface{}) ([]byte, error) {
b, ok := v.(*[]byte)
if !ok {
return nil, fmt.Errorf("failed to marshal: %v is not type of *[]byte", v)
}
return *b, nil
}
func (bytesCodec) Unmarshal(data []byte, v interface{}) error {
b, ok := v.(*[]byte)
if !ok {
return fmt.Errorf("failed to unmarshal: %v is not type of *[]byte", v)
}
*b = data
return nil
}
func (bytesCodec) Name() string {
return "bytes"
}
func (jsonCodec) Marshal(v interface{}) ([]byte, error) {
if b, ok := v.(*bytes.Frame); ok {
return b.Data, nil
}
if pb, ok := v.(proto.Message); ok {
buf := bufferPool.Get()
defer bufferPool.Put(buf)
if err := jsonpbMarshaler.Marshal(buf, pb); err != nil {
return nil, err
}
return buf.Bytes(), nil
}
return json.Marshal(v)
}
func (jsonCodec) Unmarshal(data []byte, v interface{}) error {
if len(data) == 0 {
return nil
}
if b, ok := v.(*bytes.Frame); ok {
b.Data = data
return nil
}
if pb, ok := v.(proto.Message); ok {
return jsonpb.Unmarshal(b.NewReader(data), pb)
}
dec := json.NewDecoder(b.NewReader(data))
if useNumber {
dec.UseNumber()
}
return dec.Decode(v)
}
func (jsonCodec) Name() string {
return "json"
}
type grpcCodec struct {
// headers
id string
target string
method string
endpoint string
s grpc.ClientStream
c encoding.Codec
}
func (g *grpcCodec) ReadHeader(m *codec.Message, mt codec.MessageType) error {
md, err := g.s.Header()
if err != nil {
return err
}
if m == nil {
m = new(codec.Message)
}
if m.Header == nil {
m.Header = make(map[string]string, len(md))
}
for k, v := range md {
m.Header[k] = strings.Join(v, ",")
}
m.Id = g.id
m.Target = g.target
m.Method = g.method
m.Endpoint = g.endpoint
return nil
}
func (g *grpcCodec) ReadBody(v interface{}) error {
if f, ok := v.(*bytes.Frame); ok {
return g.s.RecvMsg(f)
}
return g.s.RecvMsg(v)
}
func (g *grpcCodec) Write(m *codec.Message, v interface{}) error {
// if we don't have a body
if v != nil {
return g.s.SendMsg(v)
}
// write the body using the framing codec
return g.s.SendMsg(&bytes.Frame{Data: m.Body})
}
func (g *grpcCodec) Close() error {
return g.s.CloseSend()
}
func (g *grpcCodec) String() string {
return g.c.Name()
}

39
client/grpc/error.go
View File

@ -1,39 +0,0 @@
package grpc
import (
"github.com/unistack-org/micro/v3/errors"
"google.golang.org/grpc/status"
)
func microError(err error) error {
// no error
switch err {
case nil:
return nil
}
if verr, ok := err.(*errors.Error); ok {
return verr
}
// grpc error
s, ok := status.FromError(err)
if !ok {
return err
}
// return first error from details
if details := s.Details(); len(details) > 0 {
if verr, ok := details[0].(error); ok {
return microError(verr)
}
}
// try to decode micro *errors.Error
if e := errors.Parse(s.Message()); e.Code > 0 {
return e // actually a micro error
}
// fallback
return errors.InternalServerError("go.micro.client", s.Message())
}

743
client/grpc/grpc.go
View File

@ -1,743 +0,0 @@
// Package grpc provides a gRPC client
package grpc
import (
"context"
"crypto/tls"
"fmt"
"net"
"reflect"
"strings"
"sync"
"sync/atomic"
"time"
"github.com/unistack-org/micro/v3/broker"
"github.com/unistack-org/micro/v3/client"
raw "github.com/unistack-org/micro/v3/codec/bytes"
"github.com/unistack-org/micro/v3/errors"
"github.com/unistack-org/micro/v3/metadata"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/encoding"
gmetadata "google.golang.org/grpc/metadata"
)
type grpcClient struct {
opts client.Options
codecs map[string]encoding.Codec
pool *pool
once atomic.Value
sync.RWMutex
}
func init() {
encoding.RegisterCodec(wrapCodec{jsonCodec{}})
encoding.RegisterCodec(wrapCodec{protoCodec{}})
encoding.RegisterCodec(wrapCodec{bytesCodec{}})
}
// secure returns the dial option for whether its a secure or insecure connection
func (g *grpcClient) secure(addr string) grpc.DialOption {
// first we check if theres'a tls config
if g.opts.Context != nil {
if v := g.opts.Context.Value(tlsAuth{}); v != nil {
tls := v.(*tls.Config)
creds := credentials.NewTLS(tls)
// return tls config if it exists
return grpc.WithTransportCredentials(creds)
}
}
// default config
tlsConfig := &tls.Config{}
defaultCreds := grpc.WithTransportCredentials(credentials.NewTLS(tlsConfig))
// check if the address is prepended with https
if strings.HasPrefix(addr, "https://") {
return defaultCreds
}
// if no port is specified or port is 443 default to tls
_, port, err := net.SplitHostPort(addr)
// assuming with no port its going to be secured
if port == "443" {
return defaultCreds
} else if err != nil && strings.Contains(err.Error(), "missing port in address") {
return defaultCreds
}
// other fallback to insecure
return grpc.WithInsecure()
}
func (g *grpcClient) call(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error {
var header map[string]string
if md, ok := metadata.FromContext(ctx); ok {
header = make(map[string]string, len(md))
for k, v := range md {
header[strings.ToLower(k)] = v
}
} else {
header = make(map[string]string)
}
// set timeout in nanoseconds
header["timeout"] = fmt.Sprintf("%d", opts.RequestTimeout)
// set the content type for the request
header["x-content-type"] = req.ContentType()
md := gmetadata.New(header)
ctx = gmetadata.NewOutgoingContext(ctx, md)
cf, err := g.newGRPCCodec(req.ContentType())
if err != nil {
return errors.InternalServerError("go.micro.client", err.Error())
}
maxRecvMsgSize := g.maxRecvMsgSizeValue()
maxSendMsgSize := g.maxSendMsgSizeValue()
var grr error
gctx, cancel := context.WithTimeout(ctx, opts.DialTimeout)
defer cancel()
grpcDialOptions := []grpc.DialOption{
g.secure(addr),
grpc.WithDefaultCallOptions(
grpc.MaxCallRecvMsgSize(maxRecvMsgSize),
grpc.MaxCallSendMsgSize(maxSendMsgSize),
),
}
if opts := g.getGrpcDialOptions(); opts != nil {
grpcDialOptions = append(grpcDialOptions, opts...)
}
cc, err := g.pool.getConn(gctx, addr, grpcDialOptions...)
if err != nil {
return errors.InternalServerError("go.micro.client", fmt.Sprintf("Error sending request: %v", err))
}
defer func() {
// defer execution of release
g.pool.release(addr, cc, grr)
}()
ch := make(chan error, 1)
go func() {
grpcCallOptions := []grpc.CallOption{
grpc.ForceCodec(cf),
grpc.CallContentSubtype(cf.Name())}
if opts := g.getGrpcCallOptions(); opts != nil {
grpcCallOptions = append(grpcCallOptions, opts...)
}
err := cc.Invoke(ctx, methodToGRPC(req.Service(), req.Endpoint()), req.Body(), rsp, grpcCallOptions...)
ch <- microError(err)
}()
select {
case err := <-ch:
grr = err
case <-ctx.Done():
grr = errors.Timeout("go.micro.client", "%v", ctx.Err())
}
return grr
}
func (g *grpcClient) stream(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error {
var header map[string]string
if md, ok := metadata.FromContext(ctx); ok {
header = make(map[string]string, len(md))
for k, v := range md {
header[k] = v
}
} else {
header = make(map[string]string)
}
// set timeout in nanoseconds
if opts.StreamTimeout > time.Duration(0) {
header["timeout"] = fmt.Sprintf("%d", opts.StreamTimeout)
}
// set the content type for the request
header["x-content-type"] = req.ContentType()
md := gmetadata.New(header)
ctx = gmetadata.NewOutgoingContext(ctx, md)
cf, err := g.newGRPCCodec(req.ContentType())
if err != nil {
return errors.InternalServerError("go.micro.client", err.Error())
}
var dialCtx context.Context
var cancel context.CancelFunc
if opts.DialTimeout >= 0 {
dialCtx, cancel = context.WithTimeout(ctx, opts.DialTimeout)
} else {
dialCtx, cancel = context.WithCancel(ctx)
}
defer cancel()
wc := wrapCodec{cf}
grpcDialOptions := []grpc.DialOption{
g.secure(addr),
}
if opts := g.getGrpcDialOptions(); opts != nil {
grpcDialOptions = append(grpcDialOptions, opts...)
}
cc, err := grpc.DialContext(dialCtx, addr, grpcDialOptions...)
if err != nil {
return errors.InternalServerError("go.micro.client", fmt.Sprintf("Error sending request: %v", err))
}
desc := &grpc.StreamDesc{
StreamName: req.Service() + req.Endpoint(),
ClientStreams: true,
ServerStreams: true,
}
grpcCallOptions := []grpc.CallOption{
grpc.ForceCodec(wc),
grpc.CallContentSubtype(cf.Name()),
}
if opts := g.getGrpcCallOptions(); opts != nil {
grpcCallOptions = append(grpcCallOptions, opts...)
}
// create a new cancelling context
newCtx, cancel := context.WithCancel(ctx)
st, err := cc.NewStream(newCtx, desc, methodToGRPC(req.Service(), req.Endpoint()), grpcCallOptions...)
if err != nil {
// we need to cleanup as we dialled and created a context
// cancel the context
cancel()
// close the connection
cc.Close()
// now return the error
return errors.InternalServerError("go.micro.client", fmt.Sprintf("Error creating stream: %v", err))
}
codec := &grpcCodec{
s: st,
c: wc,
}
// set request codec
if r, ok := req.(*grpcRequest); ok {
r.codec = codec
}
// setup the stream response
stream := &grpcStream{
ClientStream: st,
context: ctx,
request: req,
response: &response{
conn: cc,
stream: st,
codec: cf,
gcodec: codec,
},
conn: cc,
cancel: cancel,
}
// set the stream as the response
val := reflect.ValueOf(rsp).Elem()
val.Set(reflect.ValueOf(stream).Elem())
return nil
}
func (g *grpcClient) poolMaxStreams() int {
if g.opts.Context == nil {
return DefaultPoolMaxStreams
}
v := g.opts.Context.Value(poolMaxStreams{})
if v == nil {
return DefaultPoolMaxStreams
}
return v.(int)
}
func (g *grpcClient) poolMaxIdle() int {
if g.opts.Context == nil {
return DefaultPoolMaxIdle
}
v := g.opts.Context.Value(poolMaxIdle{})
if v == nil {
return DefaultPoolMaxIdle
}
return v.(int)
}
func (g *grpcClient) maxRecvMsgSizeValue() int {
if g.opts.Context == nil {
return DefaultMaxRecvMsgSize
}
v := g.opts.Context.Value(maxRecvMsgSizeKey{})
if v == nil {
return DefaultMaxRecvMsgSize
}
return v.(int)
}
func (g *grpcClient) maxSendMsgSizeValue() int {
if g.opts.Context == nil {
return DefaultMaxSendMsgSize
}
v := g.opts.Context.Value(maxSendMsgSizeKey{})
if v == nil {
return DefaultMaxSendMsgSize
}
return v.(int)
}
func (g *grpcClient) newGRPCCodec(contentType string) (encoding.Codec, error) {
g.RLock()
defer g.RUnlock()
if c, ok := g.codecs[contentType]; ok {
return wrapCodec{c}, nil
}
return nil, fmt.Errorf("Unsupported Content-Type: %s", contentType)
}
func (g *grpcClient) Init(opts ...client.Option) error {
size := g.opts.PoolSize
ttl := g.opts.PoolTTL
for _, o := range opts {
o(&g.opts)
}
// update pool configuration if the options changed
if size != g.opts.PoolSize || ttl != g.opts.PoolTTL {
g.pool.Lock()
g.pool.size = g.opts.PoolSize
g.pool.ttl = int64(g.opts.PoolTTL.Seconds())
g.pool.Unlock()
}
return nil
}
func (g *grpcClient) Options() client.Options {
return g.opts
}
func (g *grpcClient) NewMessage(topic string, msg interface{}, opts ...client.MessageOption) client.Message {
return newGRPCEvent(topic, msg, g.opts.ContentType, opts...)
}
func (g *grpcClient) NewRequest(service, method string, req interface{}, reqOpts ...client.RequestOption) client.Request {
return newGRPCRequest(service, method, req, g.opts.ContentType, reqOpts...)
}
func (g *grpcClient) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
if req == nil {
return errors.InternalServerError("go.micro.client", "req is nil")
} else if rsp == nil {
return errors.InternalServerError("go.micro.client", "rsp is nil")
}
// make a copy of call opts
callOpts := g.opts.CallOptions
for _, opt := range opts {
opt(&callOpts)
}
// check if we already have a deadline
d, ok := ctx.Deadline()
if !ok {
// no deadline so we create a new one
var cancel context.CancelFunc
ctx, cancel = context.WithTimeout(ctx, callOpts.RequestTimeout)
defer cancel()
} else {
// got a deadline so no need to setup context
// but we need to set the timeout we pass along
opt := client.WithRequestTimeout(time.Until(d))
opt(&callOpts)
}
// should we noop right here?
select {
case <-ctx.Done():
return errors.New("go.micro.client", fmt.Sprintf("%v", ctx.Err()), 408)
default:
}
// make copy of call method
gcall := g.call
// wrap the call in reverse
for i := len(callOpts.CallWrappers); i > 0; i-- {
gcall = callOpts.CallWrappers[i-1](gcall)
}
// use the router passed as a call option, or fallback to the rpc clients router
if callOpts.Router == nil {
callOpts.Router = g.opts.Router
}
if callOpts.Selector == nil {
callOpts.Selector = g.opts.Selector
}
// inject proxy address
// TODO: don't even bother using Lookup/Select in this case
if len(g.opts.Proxy) > 0 {
callOpts.Address = []string{g.opts.Proxy}
}
// lookup the route to send the reques to
// TODO apply any filtering here
routes, err := g.opts.Lookup(ctx, req, callOpts)
if err != nil {
return errors.InternalServerError("go.micro.client", err.Error())
}
// balance the list of nodes
next, err := callOpts.Selector.Select(routes)
if err != nil {
return err
}
// return errors.New("go.micro.client", "request timeout", 408)
call := func(i int) error {
// call backoff first. Someone may want an initial start delay
t, err := callOpts.Backoff(ctx, req, i)
if err != nil {
return errors.InternalServerError("go.micro.client", err.Error())
}
// only sleep if greater than 0
if t.Seconds() > 0 {
time.Sleep(t)
}
// get the next node
node := next()
// make the call
err = gcall(ctx, node, req, rsp, callOpts)
// record the result of the call to inform future routing decisions
g.opts.Selector.Record(node, err)
// try and transform the error to a go-micro error
if verr, ok := err.(*errors.Error); ok {
return verr
}
return err
}
ch := make(chan error, callOpts.Retries+1)
var gerr error
for i := 0; i <= callOpts.Retries; i++ {
go func(i int) {
ch <- call(i)
}(i)
select {
case <-ctx.Done():
return errors.New("go.micro.client", fmt.Sprintf("%v", ctx.Err()), 408)
case err := <-ch:
// if the call succeeded lets bail early
if err == nil {
return nil
}
retry, rerr := callOpts.Retry(ctx, req, i, err)
if rerr != nil {
return rerr
}
if !retry {
return err
}
gerr = err
}
}
return gerr
}
func (g *grpcClient) Stream(ctx context.Context, req client.Request, opts ...client.CallOption) (client.Stream, error) {
// make a copy of call opts
callOpts := g.opts.CallOptions
for _, opt := range opts {
opt(&callOpts)
}
// #200 - streams shouldn't have a request timeout set on the context
// should we noop right here?
select {
case <-ctx.Done():
return nil, errors.New("go.micro.client", fmt.Sprintf("%v", ctx.Err()), 408)
default:
}
// make a copy of stream
gstream := g.stream
// wrap the call in reverse
for i := len(callOpts.CallWrappers); i > 0; i-- {
gstream = callOpts.CallWrappers[i-1](gstream)
}
// use the router passed as a call option, or fallback to the rpc clients router
if callOpts.Router == nil {
callOpts.Router = g.opts.Router
}
if callOpts.Selector == nil {
callOpts.Selector = g.opts.Selector
}
// inject proxy address
// TODO: don't even bother using Lookup/Select in this case
if len(g.opts.Proxy) > 0 {
callOpts.Address = []string{g.opts.Proxy}
}
// lookup the route to send the reques to
// TODO: move to internal lookup func
routes, err := g.opts.Lookup(ctx, req, callOpts)
if err != nil {
return nil, errors.InternalServerError("go.micro.client", err.Error())
}
// balance the list of nodes
next, err := callOpts.Selector.Select(routes)
if err != nil {
return nil, err
}
call := func(i int) (client.Stream, error) {
// call backoff first. Someone may want an initial start delay
t, err := callOpts.Backoff(ctx, req, i)
if err != nil {
return nil, errors.InternalServerError("go.micro.client", err.Error())
}
// only sleep if greater than 0
if t.Seconds() > 0 {
time.Sleep(t)
}
// get the next node
node := next()
// make the call
stream := &grpcStream{}
err = g.stream(ctx, node, req, stream, callOpts)
// record the result of the call to inform future routing decisions
g.opts.Selector.Record(node, err)
// try and transform the error to a go-micro error
if verr, ok := err.(*errors.Error); ok {
return nil, verr
}
g.opts.Selector.Record(node, err)
return stream, err
}
type response struct {
stream client.Stream
err error
}
ch := make(chan response, callOpts.Retries+1)
var grr error
for i := 0; i <= callOpts.Retries; i++ {
go func(i int) {
s, err := call(i)
ch <- response{s, err}
}(i)
select {
case <-ctx.Done():
return nil, errors.New("go.micro.client", fmt.Sprintf("%v", ctx.Err()), 408)
case rsp := <-ch:
// if the call succeeded lets bail early
if rsp.err == nil {
return rsp.stream, nil
}
retry, rerr := callOpts.Retry(ctx, req, i, grr)
if rerr != nil {
return nil, rerr
}
if !retry {
return nil, rsp.err
}
grr = rsp.err
}
}
return nil, grr
}
func (g *grpcClient) Publish(ctx context.Context, p client.Message, opts ...client.PublishOption) error {
var options client.PublishOptions
var body []byte
// fail early on connect error
if !g.once.Load().(bool) {
if err := g.opts.Broker.Connect(); err != nil {
return errors.InternalServerError("go.micro.client", err.Error())
}
g.once.Store(true)
}
for _, o := range opts {
o(&options)
}
md, ok := metadata.FromContext(ctx)
if !ok {
md = make(map[string]string)
}
md["Content-Type"] = p.ContentType()
md["Micro-Topic"] = p.Topic()
// passed in raw data
if d, ok := p.Payload().(*raw.Frame); ok {
body = d.Data
} else {
// use codec for payload
cf, err := g.newGRPCCodec(p.ContentType())
if err != nil {
return errors.InternalServerError("go.micro.client", err.Error())
}
// set the body
b, err := cf.Marshal(p.Payload())
if err != nil {
return errors.InternalServerError("go.micro.client", err.Error())
}
body = b
}
topic := p.Topic()
// get the exchange
if len(options.Exchange) > 0 {
topic = options.Exchange
}
return g.opts.Broker.Publish(topic, &broker.Message{
Header: md,
Body: body,
}, broker.PublishContext(options.Context))
}
func (g *grpcClient) String() string {
return "grpc"
}
func (g *grpcClient) getGrpcDialOptions() []grpc.DialOption {
if g.opts.CallOptions.Context == nil {
return nil
}
v := g.opts.CallOptions.Context.Value(grpcDialOptions{})
if v == nil {
return nil
}
opts, ok := v.([]grpc.DialOption)
if !ok {
return nil
}
return opts
}
func (g *grpcClient) getGrpcCallOptions() []grpc.CallOption {
if g.opts.CallOptions.Context == nil {
return nil
}
v := g.opts.CallOptions.Context.Value(grpcCallOptions{})
if v == nil {
return nil
}
opts, ok := v.([]grpc.CallOption)
if !ok {
return nil
}
return opts
}
func newClient(opts ...client.Option) client.Client {
options := client.NewOptions()
// default content type for grpc
options.ContentType = "application/grpc+proto"
for _, o := range opts {
o(&options)
}
rc := &grpcClient{
opts: options,
}
rc.once.Store(false)
rc.pool = newPool(options.PoolSize, options.PoolTTL, rc.poolMaxIdle(), rc.poolMaxStreams())
c := client.Client(rc)
// wrap in reverse
for i := len(options.Wrappers); i > 0; i-- {
c = options.Wrappers[i-1](c)
}
rc.codecs = make(map[string]encoding.Codec, len(defaultGRPCCodecs))
for k, v := range defaultGRPCCodecs {
rc.codecs[k] = v
}
var codecs map[string]encoding.Codec
if rc.opts.Context != nil {
if v := rc.opts.Context.Value(codecsKey{}); v != nil {
codecs = v.(map[string]encoding.Codec)
}
}
for k, v := range codecs {
rc.codecs[k] = v
}
return c
}
func NewClient(opts ...client.Option) client.Client {
return newClient(opts...)
}

216
client/grpc/grpc_pool.go
View File

@ -1,216 +0,0 @@
package grpc
import (
"context"
"sync"
"time"
"google.golang.org/grpc"
"google.golang.org/grpc/connectivity"
)
type pool struct {
size int
ttl int64
// max streams on a *poolConn
maxStreams int
// max idle conns
maxIdle int
sync.Mutex
conns map[string]*streamsPool
}
type streamsPool struct {
// head of list
head *poolConn
// busy conns list
busy *poolConn
// the siza of list
count int
// idle conn
idle int
}
type poolConn struct {
// grpc conn
*grpc.ClientConn
err error
addr string
// pool and streams pool
pool *pool
sp *streamsPool
streams int
created int64
// list
pre *poolConn
next *poolConn
in bool
}
func newPool(size int, ttl time.Duration, idle int, ms int) *pool {
if ms <= 0 {
ms = 1
}
if idle < 0 {
idle = 0
}
return &pool{
size: size,
ttl: int64(ttl.Seconds()),
maxStreams: ms,
maxIdle: idle,
conns: make(map[string]*streamsPool),
}
}
func (p *pool) getConn(ctx context.Context, addr string, opts ...grpc.DialOption) (*poolConn, error) {
now := time.Now().Unix()
p.Lock()
sp, ok := p.conns[addr]
if !ok {
sp = &streamsPool{head: &poolConn{}, busy: &poolConn{}, count: 0, idle: 0}
p.conns[addr] = sp
}
// while we have conns check streams and then return one
// otherwise we'll create a new conn
conn := sp.head.next
for conn != nil {
// check conn state
// https://github.com/grpc/grpc/blob/master/doc/connectivity-semantics-and-api.md
switch conn.GetState() {
case connectivity.Connecting:
conn = conn.next
continue
case connectivity.Shutdown:
next := conn.next
if conn.streams == 0 {
removeConn(conn)
sp.idle--
}
conn = next
continue
case connectivity.TransientFailure:
next := conn.next
if conn.streams == 0 {
removeConn(conn)
conn.ClientConn.Close()
sp.idle--
}
conn = next
continue
case connectivity.Ready:
case connectivity.Idle:
}
// a old conn
if now-conn.created > p.ttl {
next := conn.next
if conn.streams == 0 {
removeConn(conn)
conn.ClientConn.Close()
sp.idle--
}
conn = next
continue
}
// a busy conn
if conn.streams >= p.maxStreams {
next := conn.next
removeConn(conn)
addConnAfter(conn, sp.busy)
conn = next
continue
}
// a idle conn
if conn.streams == 0 {
sp.idle--
}
// a good conn
conn.streams++
p.Unlock()
return conn, nil
}
p.Unlock()
// create new conn
cc, err := grpc.DialContext(ctx, addr, opts...)
if err != nil {
return nil, err
}
conn = &poolConn{cc, nil, addr, p, sp, 1, time.Now().Unix(), nil, nil, false}
// add conn to streams pool
p.Lock()
if sp.count < p.size {
addConnAfter(conn, sp.head)
}
p.Unlock()
return conn, nil
}
func (p *pool) release(addr string, conn *poolConn, err error) {
p.Lock()
p, sp, created := conn.pool, conn.sp, conn.created
// try to add conn
if !conn.in && sp.count < p.size {
addConnAfter(conn, sp.head)
}
if !conn.in {
p.Unlock()
conn.ClientConn.Close()
return
}
// a busy conn
if conn.streams >= p.maxStreams {
removeConn(conn)
addConnAfter(conn, sp.head)
}
conn.streams--
// if streams == 0, we can do something
if conn.streams == 0 {
// 1. it has errored
// 2. too many idle conn or
// 3. conn is too old
now := time.Now().Unix()
if err != nil || sp.idle >= p.maxIdle || now-created > p.ttl {
removeConn(conn)
p.Unlock()
conn.ClientConn.Close()
return
}
sp.idle++
}
p.Unlock()
}
func (conn *poolConn) Close() {
conn.pool.release(conn.addr, conn, conn.err)
}
func removeConn(conn *poolConn) {
if conn.pre != nil {
conn.pre.next = conn.next
}
if conn.next != nil {
conn.next.pre = conn.pre
}
conn.pre = nil
conn.next = nil
conn.in = false
conn.sp.count--
}
func addConnAfter(conn *poolConn, after *poolConn) {
conn.next = after.next
conn.pre = after
if after.next != nil {
after.next.pre = conn
}
after.next = conn
conn.in = true
conn.sp.count++
}

65
client/grpc/grpc_pool_test.go
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@ -1,65 +0,0 @@
package grpc
import (
"context"
"net"
"testing"
"time"
"google.golang.org/grpc"
pgrpc "google.golang.org/grpc"
pb "google.golang.org/grpc/examples/helloworld/helloworld"
)
func testPool(t *testing.T, size int, ttl time.Duration, idle int, ms int) {
// setup server
l, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
t.Fatalf("failed to listen: %v", err)
}
defer l.Close()
s := pgrpc.NewServer()
pb.RegisterGreeterServer(s, &greeterServer{})
go s.Serve(l)
defer s.Stop()
ctx := context.Background()
// zero pool
p := newPool(size, ttl, idle, ms)
for i := 0; i < 10; i++ {
// get a conn
cc, err := p.getConn(ctx, l.Addr().String(), grpc.WithInsecure())
if err != nil {
t.Fatal(err)
}
rsp := pb.HelloReply{}
err = cc.Invoke(context.TODO(), "/helloworld.Greeter/SayHello", &pb.HelloRequest{Name: "John"}, &rsp)
if err != nil {
t.Fatal(err)
}
if rsp.Message != "Hello John" {
t.Fatalf("Got unexpected response %v", rsp.Message)
}
// release the conn
p.release(l.Addr().String(), cc, nil)
p.Lock()
if i := p.conns[l.Addr().String()].count; i > size {
p.Unlock()
t.Fatalf("pool size %d is greater than expected %d", i, size)
}
p.Unlock()
}
}
func TestGRPCPool(t *testing.T) {
testPool(t, 0, time.Minute, 10, 2)
testPool(t, 2, time.Minute, 10, 1)
}

108
client/grpc/grpc_test.go
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@ -1,108 +0,0 @@
package grpc
import (
"context"
"net"
"testing"
"github.com/unistack-org/micro/v3/client"
"github.com/unistack-org/micro/v3/errors"
"github.com/unistack-org/micro/v3/registry"
"github.com/unistack-org/micro/v3/registry/memory"
"github.com/unistack-org/micro/v3/router"
regRouter "github.com/unistack-org/micro/v3/router/registry"
pgrpc "google.golang.org/grpc"
pb "google.golang.org/grpc/examples/helloworld/helloworld"
)
// server is used to implement helloworld.GreeterServer.
type greeterServer struct{}
// SayHello implements helloworld.GreeterServer
func (g *greeterServer) SayHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {
if in.Name == "Error" {
return nil, &errors.Error{Id: "1", Code: 99, Detail: "detail"}
}
return &pb.HelloReply{Message: "Hello " + in.Name}, nil
}
func TestGRPCClient(t *testing.T) {
l, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
t.Fatalf("failed to listen: %v", err)
}
defer l.Close()
s := pgrpc.NewServer()
pb.RegisterGreeterServer(s, &greeterServer{})
go s.Serve(l)
defer s.Stop()
// create mock registry
r := memory.NewRegistry()
// register service
r.Register(&registry.Service{
Name: "helloworld",
Version: "test",
Nodes: []*registry.Node{
{
Id: "test-1",
Address: l.Addr().String(),
Metadata: map[string]string{
"protocol": "grpc",
},
},
},
})
// create router
rtr := regRouter.NewRouter(router.Registry(r))
// create client
c := NewClient(client.Router(rtr))
testMethods := []string{
"/helloworld.Greeter/SayHello",
"Greeter.SayHello",
}
for _, method := range testMethods {
req := c.NewRequest("helloworld", method, &pb.HelloRequest{
Name: "John",
})
rsp := pb.HelloReply{}
err = c.Call(context.TODO(), req, &rsp)
if err != nil {
t.Fatal(err)
}
if rsp.Message != "Hello John" {
t.Fatalf("Got unexpected response %v", rsp.Message)
}
}
req := c.NewRequest("helloworld", "/helloworld.Greeter/SayHello", &pb.HelloRequest{
Name: "Error",
})
rsp := pb.HelloReply{}
err = c.Call(context.TODO(), req, &rsp)
if err == nil {
t.Fatal("nil error received")
}
verr, ok := err.(*errors.Error)
if !ok {
t.Fatalf("invalid error received %#+v\n", err)
}
if verr.Code != 99 && verr.Id != "1" && verr.Detail != "detail" {
t.Fatalf("invalid error received %#+v\n", verr)
}
}

40
client/grpc/message.go
View File

@ -1,40 +0,0 @@
package grpc
import (
"github.com/unistack-org/micro/v3/client"
)
type grpcEvent struct {
topic string
contentType string
payload interface{}
}
func newGRPCEvent(topic string, payload interface{}, contentType string, opts ...client.MessageOption) client.Message {
var options client.MessageOptions
for _, o := range opts {
o(&options)
}
if len(options.ContentType) > 0 {
contentType = options.ContentType
}
return &grpcEvent{
payload: payload,
topic: topic,
contentType: contentType,
}
}
func (g *grpcEvent) ContentType() string {
return g.contentType
}
func (g *grpcEvent) Topic() string {
return g.topic
}
func (g *grpcEvent) Payload() interface{} {
return g.payload
}

131
client/grpc/options.go
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@ -1,131 +0,0 @@
// Package grpc provides a gRPC options
package grpc
import (
"context"
"crypto/tls"
"github.com/unistack-org/micro/v3/client"
"google.golang.org/grpc"
"google.golang.org/grpc/encoding"
)
var (
// DefaultPoolMaxStreams maximum streams on a connectioin
// (20)
DefaultPoolMaxStreams = 20
// DefaultPoolMaxIdle maximum idle conns of a pool
// (50)
DefaultPoolMaxIdle = 50
// DefaultMaxRecvMsgSize maximum message that client can receive
// (4 MB).
DefaultMaxRecvMsgSize = 1024 * 1024 * 4
// DefaultMaxSendMsgSize maximum message that client can send
// (4 MB).
DefaultMaxSendMsgSize = 1024 * 1024 * 4
)
type poolMaxStreams struct{}
type poolMaxIdle struct{}
type codecsKey struct{}
type tlsAuth struct{}
type maxRecvMsgSizeKey struct{}
type maxSendMsgSizeKey struct{}
type grpcDialOptions struct{}
type grpcCallOptions struct{}
// maximum streams on a connectioin
func PoolMaxStreams(n int) client.Option {
return func(o *client.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, poolMaxStreams{}, n)
}
}
// maximum idle conns of a pool
func PoolMaxIdle(d int) client.Option {
return func(o *client.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, poolMaxIdle{}, d)
}
}
// gRPC Codec to be used to encode/decode requests for a given content type
func Codec(contentType string, c encoding.Codec) client.Option {
return func(o *client.Options) {
codecs := make(map[string]encoding.Codec)
if o.Context == nil {
o.Context = context.Background()
}
if v := o.Context.Value(codecsKey{}); v != nil {
codecs = v.(map[string]encoding.Codec)
}
codecs[contentType] = c
o.Context = context.WithValue(o.Context, codecsKey{}, codecs)
}
}
// AuthTLS should be used to setup a secure authentication using TLS
func AuthTLS(t *tls.Config) client.Option {
return func(o *client.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, tlsAuth{}, t)
}
}
//
// MaxRecvMsgSize set the maximum size of message that client can receive.
//
func MaxRecvMsgSize(s int) client.Option {
return func(o *client.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, maxRecvMsgSizeKey{}, s)
}
}
//
// MaxSendMsgSize set the maximum size of message that client can send.
//
func MaxSendMsgSize(s int) client.Option {
return func(o *client.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, maxSendMsgSizeKey{}, s)
}
}
//
// DialOptions to be used to configure gRPC dial options
//
func DialOptions(opts ...grpc.DialOption) client.CallOption {
return func(o *client.CallOptions) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, grpcDialOptions{}, opts)
}
}
//
// CallOptions to be used to configure gRPC call options
//
func CallOptions(opts ...grpc.CallOption) client.CallOption {
return func(o *client.CallOptions) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, grpcCallOptions{}, opts)
}
}

87
client/grpc/request.go
View File

@ -1,87 +0,0 @@
package grpc
import (
"fmt"
"strings"
"github.com/unistack-org/micro/v3/client"
"github.com/unistack-org/micro/v3/codec"
)
type grpcRequest struct {
service string
method string
contentType string
request interface{}
opts client.RequestOptions
codec codec.Codec
}
// service Struct.Method /service.Struct/Method
func methodToGRPC(service, method string) string {
// no method or already grpc method
if len(method) == 0 || method[0] == '/' {
return method
}
// assume method is Foo.Bar
mParts := strings.Split(method, ".")
if len(mParts) != 2 {
return method
}
if len(service) == 0 {
return fmt.Sprintf("/%s/%s", mParts[0], mParts[1])
}
// return /pkg.Foo/Bar
return fmt.Sprintf("/%s.%s/%s", service, mParts[0], mParts[1])
}
func newGRPCRequest(service, method string, request interface{}, contentType string, reqOpts ...client.RequestOption) client.Request {
var opts client.RequestOptions
for _, o := range reqOpts {
o(&opts)
}
// set the content-type specified
if len(opts.ContentType) > 0 {
contentType = opts.ContentType
}
return &grpcRequest{
service: service,
method: method,
request: request,
contentType: contentType,
opts: opts,
}
}
func (g *grpcRequest) ContentType() string {
return g.contentType
}
func (g *grpcRequest) Service() string {
return g.service
}
func (g *grpcRequest) Method() string {
return g.method
}
func (g *grpcRequest) Endpoint() string {
return g.method
}
func (g *grpcRequest) Codec() codec.Writer {
return g.codec
}
func (g *grpcRequest) Body() interface{} {
return g.request
}
func (g *grpcRequest) Stream() bool {
return g.opts.Stream
}

41
client/grpc/request_test.go
View File

@ -1,41 +0,0 @@
package grpc
import (
"testing"
)
func TestMethodToGRPC(t *testing.T) {
testData := []struct {
service string
method string
expect string
}{
{
"helloworld",
"Greeter.SayHello",
"/helloworld.Greeter/SayHello",
},
{
"helloworld",
"/helloworld.Greeter/SayHello",
"/helloworld.Greeter/SayHello",
},
{
"",
"/helloworld.Greeter/SayHello",
"/helloworld.Greeter/SayHello",
},
{
"",
"Greeter.SayHello",
"/Greeter/SayHello",
},
}
for _, d := range testData {
method := methodToGRPC(d.service, d.method)
if method != d.expect {
t.Fatalf("expected %s got %s", d.expect, method)
}
}
}

44
client/grpc/response.go
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@ -1,44 +0,0 @@
package grpc
import (
"strings"
"github.com/unistack-org/micro/v3/codec"
"github.com/unistack-org/micro/v3/codec/bytes"
"google.golang.org/grpc"
"google.golang.org/grpc/encoding"
)
type response struct {
conn *grpc.ClientConn
stream grpc.ClientStream
codec encoding.Codec
gcodec codec.Codec
}
// Read the response
func (r *response) Codec() codec.Reader {
return r.gcodec
}
// read the header
func (r *response) Header() map[string]string {
md, err := r.stream.Header()
if err != nil {
return map[string]string{}
}
hdr := make(map[string]string, len(md))
for k, v := range md {
hdr[k] = strings.Join(v, ",")
}
return hdr
}
// Read the undecoded response
func (r *response) Read() ([]byte, error) {
f := &bytes.Frame{}
if err := r.gcodec.ReadBody(f); err != nil {
return nil, err
}
return f.Data, nil
}

94
client/grpc/stream.go
View File

@ -1,94 +0,0 @@
package grpc
import (
"context"
"io"
"sync"
"github.com/unistack-org/micro/v3/client"
"google.golang.org/grpc"
)
// Implements the streamer interface
type grpcStream struct {
// embed so we can access if need be
grpc.ClientStream
sync.RWMutex
closed bool
err error
conn *grpc.ClientConn
request client.Request
response client.Response
context context.Context
cancel func()
}
func (g *grpcStream) Context() context.Context {
return g.context
}
func (g *grpcStream) Request() client.Request {
return g.request
}
func (g *grpcStream) Response() client.Response {
return g.response
}
func (g *grpcStream) Send(msg interface{}) error {
if err := g.ClientStream.SendMsg(msg); err != nil {
g.setError(err)
return err
}
return nil
}
func (g *grpcStream) Recv(msg interface{}) (err error) {
defer g.setError(err)
if err = g.ClientStream.RecvMsg(msg); err != nil {
// #202 - inconsistent gRPC stream behavior
// the only way to tell if the stream is done is when we get a EOF on the Recv
// here we should close the underlying gRPC ClientConn
closeErr := g.Close()
if err == io.EOF && closeErr != nil {
err = closeErr
}
return err
}
return
}
func (g *grpcStream) Error() error {
g.RLock()
defer g.RUnlock()
return g.err
}
func (g *grpcStream) setError(e error) {
g.Lock()
g.err = e
g.Unlock()
}
// Close the gRPC send stream
// #202 - inconsistent gRPC stream behavior
// The underlying gRPC stream should not be closed here since the
// stream should still be able to receive after this function call
// TODO: should the conn be closed in another way?
func (g *grpcStream) Close() error {
g.Lock()
defer g.Unlock()
if g.closed {
return nil
}
// cancel the context
g.cancel()
g.closed = true
g.ClientStream.CloseSend()
return g.conn.Close()
}

59
client/mucp/common_test.go
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@ -1,59 +0,0 @@
package mucp
import (
"github.com/unistack-org/micro/v3/registry"
)
var (
// mock data
testData = map[string][]*registry.Service{
"foo": {
{
Name: "foo",
Version: "1.0.0",
Nodes: []*registry.Node{
{
Id: "foo-1.0.0-123",
Address: "localhost:9999",
Metadata: map[string]string{
"protocol": "mucp",
},
},
{
Id: "foo-1.0.0-321",
Address: "localhost:9999",
Metadata: map[string]string{
"protocol": "mucp",
},
},
},
},
{
Name: "foo",
Version: "1.0.1",
Nodes: []*registry.Node{
{
Id: "foo-1.0.1-321",
Address: "localhost:6666",
Metadata: map[string]string{
"protocol": "mucp",
},
},
},
},
{
Name: "foo",
Version: "1.0.3",
Nodes: []*registry.Node{
{
Id: "foo-1.0.3-345",
Address: "localhost:8888",
Metadata: map[string]string{
"protocol": "mucp",
},
},
},
},
},
}
)

626
client/mucp/mucp.go
View File

@ -1,626 +0,0 @@
// Package mucp provides an mucp client
package mucp
import (
"context"
"fmt"
"sync/atomic"
"time"
"github.com/google/uuid"
"github.com/unistack-org/micro/v3/broker"
"github.com/unistack-org/micro/v3/client"
"github.com/unistack-org/micro/v3/codec"
raw "github.com/unistack-org/micro/v3/codec/bytes"
"github.com/unistack-org/micro/v3/errors"
"github.com/unistack-org/micro/v3/metadata"
"github.com/unistack-org/micro/v3/transport"
"github.com/unistack-org/micro/v3/util/buf"
"github.com/unistack-org/micro/v3/util/pool"
)
type rpcClient struct {
once atomic.Value
opts client.Options
pool pool.Pool
seq uint64
}
// NewClient returns a new micro client interface
func NewClient(opt ...client.Option) client.Client {
opts := client.NewOptions(opt...)
p := pool.NewPool(
pool.Size(opts.PoolSize),
pool.TTL(opts.PoolTTL),
pool.Transport(opts.Transport),
)
rc := &rpcClient{
opts: opts,
pool: p,
seq: 0,
}
rc.once.Store(false)
c := client.Client(rc)
// wrap in reverse
for i := len(opts.Wrappers); i > 0; i-- {
c = opts.Wrappers[i-1](c)
}
return c
}
func (r *rpcClient) newCodec(contentType string) (codec.NewCodec, error) {
if c, ok := r.opts.Codecs[contentType]; ok {
return c, nil
}
if cf, ok := DefaultCodecs[contentType]; ok {
return cf, nil
}
return nil, fmt.Errorf("Unsupported Content-Type: %s", contentType)
}
func (r *rpcClient) call(ctx context.Context, addr string, req client.Request, resp interface{}, opts client.CallOptions) error {
msg := &transport.Message{
Header: make(map[string]string),
}
md, ok := metadata.FromContext(ctx)
if ok {
for k, v := range md {
// don't copy Micro-Topic header, that used for pub/sub
// this fix case then client uses the same context that received in subscriber
if k == "Micro-Topic" {
continue
}
msg.Header[k] = v
}
}
// set timeout in nanoseconds
msg.Header["Timeout"] = fmt.Sprintf("%d", opts.RequestTimeout)
// set the content type for the request
msg.Header["Content-Type"] = req.ContentType()
// set the accept header
msg.Header["Accept"] = req.ContentType()
cf, err := r.newCodec(req.ContentType())
if err != nil {
return errors.InternalServerError("go.micro.client", err.Error())
}
dOpts := []transport.DialOption{
transport.WithStream(),
}
if opts.DialTimeout >= 0 {
dOpts = append(dOpts, transport.WithTimeout(opts.DialTimeout))
}
c, err := r.pool.Get(addr, dOpts...)
if err != nil {
return errors.InternalServerError("go.micro.client", "connection error: %v", err)
}
seq := atomic.AddUint64(&r.seq, 1) - 1
codec := newRpcCodec(msg, c, cf, "")
rsp := &rpcResponse{
socket: c,
codec: codec,
}
stream := &rpcStream{
id: fmt.Sprintf("%v", seq),
context: ctx,
request: req,
response: rsp,
codec: codec,
closed: make(chan bool),
release: func(err error) { r.pool.Release(c, err) },
sendEOS: false,
}
// close the stream on exiting this function
defer stream.Close()
// wait for error response
ch := make(chan error, 1)
go func() {
defer func() {
if r := recover(); r != nil {
ch <- errors.InternalServerError("go.micro.client", "panic recovered: %v", r)
}
}()
// send request
if err := stream.Send(req.Body()); err != nil {
ch <- err
return
}
// recv request
if err := stream.Recv(resp); err != nil {
ch <- err
return
}
// success
ch <- nil
}()
var grr error
select {
case err := <-ch:
return err
case <-ctx.Done():
grr = errors.Timeout("go.micro.client", fmt.Sprintf("%v", ctx.Err()))
}
// set the stream error
if grr != nil {
stream.Lock()
stream.err = grr
stream.Unlock()
return grr
}
return nil
}
func (r *rpcClient) stream(ctx context.Context, addr string, req client.Request, opts client.CallOptions) (client.Stream, error) {
msg := &transport.Message{
Header: make(map[string]string),
}
md, ok := metadata.FromContext(ctx)
if ok {
for k, v := range md {
msg.Header[k] = v
}
}
// set timeout in nanoseconds
if opts.StreamTimeout > time.Duration(0) {
msg.Header["Timeout"] = fmt.Sprintf("%d", opts.StreamTimeout)
}
// set the content type for the request
msg.Header["Content-Type"] = req.ContentType()
// set the accept header
msg.Header["Accept"] = req.ContentType()
cf, err := r.newCodec(req.ContentType())
if err != nil {
return nil, errors.InternalServerError("go.micro.client", err.Error())
}
dOpts := []transport.DialOption{
transport.WithStream(),
}
if opts.DialTimeout >= 0 {
dOpts = append(dOpts, transport.WithTimeout(opts.DialTimeout))
}
c, err := r.opts.Transport.Dial(addr, dOpts...)
if err != nil {
return nil, errors.InternalServerError("go.micro.client", "connection error: %v", err)
}
// increment the sequence number
seq := atomic.AddUint64(&r.seq, 1) - 1
id := fmt.Sprintf("%v", seq)
// create codec with stream id
codec := newRpcCodec(msg, c, cf, id)
rsp := &rpcResponse{
socket: c,
codec: codec,
}
// set request codec
if r, ok := req.(*rpcRequest); ok {
r.codec = codec
}
stream := &rpcStream{
id: id,
context: ctx,
request: req,
response: rsp,
codec: codec,
// used to close the stream
closed: make(chan bool),
// signal the end of stream,
sendEOS: true,
// release func
release: func(err error) { c.Close() },
}
// wait for error response
ch := make(chan error, 1)
go func() {
// send the first message
ch <- stream.Send(req.Body())
}()
var grr error
select {
case err := <-ch:
grr = err
case <-ctx.Done():
grr = errors.Timeout("go.micro.client", fmt.Sprintf("%v", ctx.Err()))
}
if grr != nil {
// set the error
stream.Lock()
stream.err = grr
stream.Unlock()
// close the stream
stream.Close()
return nil, grr
}
return stream, nil
}
func (r *rpcClient) Init(opts ...client.Option) error {
size := r.opts.PoolSize
ttl := r.opts.PoolTTL
tr := r.opts.Transport
for _, o := range opts {
o(&r.opts)
}
// update pool configuration if the options changed
if size != r.opts.PoolSize || ttl != r.opts.PoolTTL || tr != r.opts.Transport {
// close existing pool
r.pool.Close()
// create new pool
r.pool = pool.NewPool(
pool.Size(r.opts.PoolSize),
pool.TTL(r.opts.PoolTTL),
pool.Transport(r.opts.Transport),
)
}
return nil
}
func (r *rpcClient) Options() client.Options {
return r.opts
}
func (r *rpcClient) Call(ctx context.Context, request client.Request, response interface{}, opts ...client.CallOption) error {
// make a copy of call opts
callOpts := r.opts.CallOptions
for _, opt := range opts {
opt(&callOpts)
}
// check if we already have a deadline
if d, ok := ctx.Deadline(); !ok {
// no deadline so we create a new one
var cancel context.CancelFunc
ctx, cancel = context.WithTimeout(ctx, callOpts.RequestTimeout)
defer cancel()
} else {
// got a deadline so no need to setup context
// but we need to set the timeout we pass along
remaining := d.Sub(time.Now())
client.WithRequestTimeout(remaining)(&callOpts)
}
// should we noop right here?
select {
case <-ctx.Done():
return errors.Timeout("go.micro.client", fmt.Sprintf("%v", ctx.Err()))
default:
}
// make copy of call method
rcall := r.call
// wrap the call in reverse
for i := len(callOpts.CallWrappers); i > 0; i-- {
rcall = callOpts.CallWrappers[i-1](rcall)
}
// use the router passed as a call option, or fallback to the rpc clients router
if callOpts.Router == nil {
callOpts.Router = r.opts.Router
}
if callOpts.Selector == nil {
callOpts.Selector = r.opts.Selector
}
// inject proxy address
// TODO: don't even bother using Lookup/Select in this case
if len(r.opts.Proxy) > 0 {
callOpts.Address = []string{r.opts.Proxy}
}
// lookup the route to send the reques to
// TODO apply any filtering here
routes, err := r.opts.Lookup(ctx, request, callOpts)
if err != nil {
return errors.InternalServerError("go.micro.client", err.Error())
}
// balance the list of nodes
next, err := callOpts.Selector.Select(routes)
if err != nil {
return err
}
// return errors.New("go.micro.client", "request timeout", 408)
call := func(i int) error {
// call backoff first. Someone may want an initial start delay
t, err := callOpts.Backoff(ctx, request, i)
if err != nil {
return errors.InternalServerError("go.micro.client", "backoff error: %v", err.Error())
}
// only sleep if greater than 0
if t.Seconds() > 0 {
time.Sleep(t)
}
// get the next node
node := next()
// make the call
err = rcall(ctx, node, request, response, callOpts)
// record the result of the call to inform future routing decisions
r.opts.Selector.Record(node, err)
return err
}
// get the retries
retries := callOpts.Retries
// disable retries when using a proxy
if len(r.opts.Proxy) > 0 {
retries = 0
}
ch := make(chan error, retries+1)
var gerr error
for i := 0; i <= retries; i++ {
go func(i int) {
ch <- call(i)
}(i)
select {
case <-ctx.Done():
return errors.Timeout("go.micro.client", fmt.Sprintf("call timeout: %v", ctx.Err()))
case err := <-ch:
// if the call succeeded lets bail early
if err == nil {
return nil
}
retry, rerr := callOpts.Retry(ctx, request, i, err)
if rerr != nil {
return rerr
}
if !retry {
return err
}
gerr = err
}
}
return gerr
}
func (r *rpcClient) Stream(ctx context.Context, request client.Request, opts ...client.CallOption) (client.Stream, error) {
// make a copy of call opts
callOpts := r.opts.CallOptions
for _, opt := range opts {
opt(&callOpts)
}
// should we noop right here?
select {
case <-ctx.Done():
return nil, errors.Timeout("go.micro.client", fmt.Sprintf("%v", ctx.Err()))
default:
}
// use the router passed as a call option, or fallback to the rpc clients router
if callOpts.Router == nil {
callOpts.Router = r.opts.Router
}
if callOpts.Selector == nil {
callOpts.Selector = r.opts.Selector
}
// inject proxy address
// TODO: don't even bother using Lookup/Select in this case
if len(r.opts.Proxy) > 0 {
callOpts.Address = []string{r.opts.Proxy}
}
// lookup the route to send the reques to
// TODO apply any filtering here
routes, err := r.opts.Lookup(ctx, request, callOpts)
if err != nil {
return nil, errors.InternalServerError("go.micro.client", err.Error())
}
// balance the list of nodes
next, err := callOpts.Selector.Select(routes)
if err != nil {
return nil, err
}
call := func(i int) (client.Stream, error) {
// call backoff first. Someone may want an initial start delay
t, err := callOpts.Backoff(ctx, request, i)
if err != nil {
return nil, errors.InternalServerError("go.micro.client", "backoff error: %v", err.Error())
}
// only sleep if greater than 0
if t.Seconds() > 0 {
time.Sleep(t)
}
// get the next node
node := next()
// perform the call
stream, err := r.stream(ctx, node, request, callOpts)
// record the result of the call to inform future routing decisions
r.opts.Selector.Record(node, err)
return stream, err
}
type response struct {
stream client.Stream
err error
}
// get the retries
retries := callOpts.Retries
// disable retries when using a proxy
if len(r.opts.Proxy) > 0 {
retries = 0
}
ch := make(chan response, retries+1)
var grr error
for i := 0; i <= retries; i++ {
go func(i int) {
s, err := call(i)
ch <- response{s, err}
}(i)
select {
case <-ctx.Done():
return nil, errors.Timeout("go.micro.client", fmt.Sprintf("call timeout: %v", ctx.Err()))
case rsp := <-ch:
// if the call succeeded lets bail early
if rsp.err == nil {
return rsp.stream, nil
}
retry, rerr := callOpts.Retry(ctx, request, i, rsp.err)
if rerr != nil {
return nil, rerr
}
if !retry {
return nil, rsp.err
}
grr = rsp.err
}
}
return nil, grr
}
func (r *rpcClient) Publish(ctx context.Context, msg client.Message, opts ...client.PublishOption) error {
options := client.PublishOptions{
Context: context.Background(),
}
for _, o := range opts {
o(&options)
}
md, ok := metadata.FromContext(ctx)
if !ok {
md = make(map[string]string)
}
id := uuid.New().String()
md["Content-Type"] = msg.ContentType()
md["Micro-Topic"] = msg.Topic()
md["Micro-Id"] = id
// set the topic
topic := msg.Topic()
// get the exchange
if len(options.Exchange) > 0 {
topic = options.Exchange
}
// encode message body
cf, err := r.newCodec(msg.ContentType())
if err != nil {
return errors.InternalServerError("go.micro.client", err.Error())
}
var body []byte
// passed in raw data
if d, ok := msg.Payload().(*raw.Frame); ok {
body = d.Data
} else {
// new buffer
b := buf.New(nil)
if err := cf(b).Write(&codec.Message{
Target: topic,
Type: codec.Event,
Header: map[string]string{
"Micro-Id": id,
"Micro-Topic": msg.Topic(),
},
}, msg.Payload()); err != nil {
return errors.InternalServerError("go.micro.client", err.Error())
}
// set the body
body = b.Bytes()
}
if !r.once.Load().(bool) {
if err = r.opts.Broker.Connect(); err != nil {
return errors.InternalServerError("go.micro.client", err.Error())
}
r.once.Store(true)
}
return r.opts.Broker.Publish(topic, &broker.Message{
Header: md,
Body: body,
}, broker.PublishContext(options.Context))
}
func (r *rpcClient) NewMessage(topic string, message interface{}, opts ...client.MessageOption) client.Message {
return newMessage(topic, message, r.opts.ContentType, opts...)
}
func (r *rpcClient) NewRequest(service, method string, request interface{}, reqOpts ...client.RequestOption) client.Request {
return newRequest(service, method, request, r.opts.ContentType, reqOpts...)
}
func (r *rpcClient) String() string {
return "mucp"
}

233
client/mucp/mucp_codec.go
View File

@ -1,233 +0,0 @@
package mucp
import (
"bytes"
errs "errors"
"github.com/unistack-org/micro/v3/codec"
raw "github.com/unistack-org/micro/v3/codec/bytes"
"github.com/unistack-org/micro/v3/codec/grpc"
"github.com/unistack-org/micro/v3/codec/json"
"github.com/unistack-org/micro/v3/codec/jsonrpc"
"github.com/unistack-org/micro/v3/codec/proto"
"github.com/unistack-org/micro/v3/codec/protorpc"
"github.com/unistack-org/micro/v3/errors"
"github.com/unistack-org/micro/v3/transport"
)
const (
lastStreamResponseError = "EOS"
)
// serverError represents an error that has been returned from
// the remote side of the RPC connection.
type serverError string
func (e serverError) Error() string {
return string(e)
}
// errShutdown holds the specific error for closing/closed connections
var (
errShutdown = errs.New("connection is shut down")
)
type rpcCodec struct {
client transport.Client
codec codec.Codec
req *transport.Message
buf *readWriteCloser
// signify if its a stream
stream string
}
type readWriteCloser struct {
wbuf *bytes.Buffer
rbuf *bytes.Buffer
}
var (
DefaultContentType = "application/protobuf"
DefaultCodecs = map[string]codec.NewCodec{
"application/grpc": grpc.NewCodec,
"application/grpc+json": grpc.NewCodec,
"application/grpc+proto": grpc.NewCodec,
"application/protobuf": proto.NewCodec,
"application/json": json.NewCodec,
"application/json-rpc": jsonrpc.NewCodec,
"application/proto-rpc": protorpc.NewCodec,
"application/octet-stream": raw.NewCodec,
}
)
func (rwc *readWriteCloser) Read(p []byte) (n int, err error) {
return rwc.rbuf.Read(p)
}
func (rwc *readWriteCloser) Write(p []byte) (n int, err error) {
return rwc.wbuf.Write(p)
}
func (rwc *readWriteCloser) Close() error {
rwc.rbuf.Reset()
rwc.wbuf.Reset()
return nil
}
func getHeaders(m *codec.Message) {
set := func(v, hdr string) string {
if len(v) > 0 {
return v
}
return m.Header[hdr]
}
// check error in header
m.Error = set(m.Error, "Micro-Error")
// check endpoint in header
m.Endpoint = set(m.Endpoint, "Micro-Endpoint")
// check method in header
m.Method = set(m.Method, "Micro-Method")
// set the request id
m.Id = set(m.Id, "Micro-Id")
}
func setHeaders(m *codec.Message, stream string) {
set := func(hdr, v string) {
if len(v) == 0 {
return
}
m.Header[hdr] = v
}
set("Micro-Id", m.Id)
set("Micro-Service", m.Target)
set("Micro-Method", m.Method)
set("Micro-Endpoint", m.Endpoint)
set("Micro-Error", m.Error)
if len(stream) > 0 {
set("Micro-Stream", stream)
}
}
func newRpcCodec(req *transport.Message, client transport.Client, c codec.NewCodec, stream string) codec.Codec {
rwc := &readWriteCloser{
wbuf: bytes.NewBuffer(nil),
rbuf: bytes.NewBuffer(nil),
}
r := &rpcCodec{
buf: rwc,
client: client,
codec: c(rwc),
req: req,
stream: stream,
}
return r
}
func (c *rpcCodec) Write(m *codec.Message, body interface{}) error {
c.buf.wbuf.Reset()
// create header
if m.Header == nil {
m.Header = map[string]string{}
}
// copy original header
for k, v := range c.req.Header {
m.Header[k] = v
}
// set the mucp headers
setHeaders(m, c.stream)
// if body is bytes Frame don't encode
if body != nil {
if b, ok := body.(*raw.Frame); ok {
// set body
m.Body = b.Data
} else {
// write to codec
if err := c.codec.Write(m, body); err != nil {
return errors.InternalServerError("go.micro.client.codec", err.Error())
}
// set body
m.Body = c.buf.wbuf.Bytes()
}
}
// create new transport message
msg := transport.Message{
Header: m.Header,
Body: m.Body,
}
// send the request
if err := c.client.Send(&msg); err != nil {
return errors.InternalServerError("go.micro.client.transport", err.Error())
}
return nil
}
func (c *rpcCodec) ReadHeader(m *codec.Message, r codec.MessageType) error {
var tm transport.Message
// read message from transport
if err := c.client.Recv(&tm); err != nil {
return errors.InternalServerError("go.micro.client.transport", err.Error())
}
c.buf.rbuf.Reset()
c.buf.rbuf.Write(tm.Body)
// set headers from transport
m.Header = tm.Header
// read header
err := c.codec.ReadHeader(m, r)
// get headers
getHeaders(m)
// return header error
if err != nil {
return errors.InternalServerError("go.micro.client.codec", err.Error())
}
return nil
}
func (c *rpcCodec) ReadBody(b interface{}) error {
// read body
// read raw data
if v, ok := b.(*raw.Frame); ok {
v.Data = c.buf.rbuf.Bytes()
return nil
}
if err := c.codec.ReadBody(b); err != nil {
return errors.InternalServerError("go.micro.client.codec", err.Error())
}
return nil
}
func (c *rpcCodec) Close() error {
c.buf.Close()
c.codec.Close()
if err := c.client.Close(); err != nil {
return errors.InternalServerError("go.micro.client.transport", err.Error())
}
return nil
}
func (c *rpcCodec) String() string {
return "rpc"
}

40
client/mucp/mucp_message.go
View File

@ -1,40 +0,0 @@
package mucp
import (
"github.com/unistack-org/micro/v3/client"
)
type message struct {
topic string
contentType string
payload interface{}
}
func newMessage(topic string, payload interface{}, contentType string, opts ...client.MessageOption) client.Message {
var options client.MessageOptions
for _, o := range opts {
o(&options)
}
if len(options.ContentType) > 0 {
contentType = options.ContentType
}
return &message{
payload: payload,
topic: topic,
contentType: contentType,
}
}
func (m *message) ContentType() string {
return m.contentType
}
func (m *message) Topic() string {
return m.topic
}
func (m *message) Payload() interface{} {
return m.payload
}

66
client/mucp/mucp_request.go
View File

@ -1,66 +0,0 @@
package mucp
import (
"github.com/unistack-org/micro/v3/client"
"github.com/unistack-org/micro/v3/codec"
)
type rpcRequest struct {
service string
method string
endpoint string
contentType string
codec codec.Codec
body interface{}
opts client.RequestOptions
}
func newRequest(service, endpoint string, request interface{}, contentType string, reqOpts ...client.RequestOption) client.Request {
var opts client.RequestOptions
for _, o := range reqOpts {
o(&opts)
}
// set the content-type specified
if len(opts.ContentType) > 0 {
contentType = opts.ContentType
}
return &rpcRequest{
service: service,
method: endpoint,
endpoint: endpoint,
body: request,
contentType: contentType,
opts: opts,
}
}
func (r *rpcRequest) ContentType() string {
return r.contentType
}
func (r *rpcRequest) Service() string {
return r.service
}
func (r *rpcRequest) Method() string {
return r.method
}
func (r *rpcRequest) Endpoint() string {
return r.endpoint
}
func (r *rpcRequest) Body() interface{} {
return r.body
}
func (r *rpcRequest) Codec() codec.Writer {
return r.codec
}
func (r *rpcRequest) Stream() bool {
return r.opts.Stream
}

25
client/mucp/mucp_request_test.go
View File

@ -1,25 +0,0 @@
package mucp
import (
"testing"
"github.com/unistack-org/micro/v3/client"
)
func TestRequestOptions(t *testing.T) {
r := newRequest("service", "endpoint", nil, "application/json")
if r.Service() != "service" {
t.Fatalf("expected 'service' got %s", r.Service())
}
if r.Endpoint() != "endpoint" {
t.Fatalf("expected 'endpoint' got %s", r.Endpoint())
}
if r.ContentType() != "application/json" {
t.Fatalf("expected 'endpoint' got %s", r.ContentType())
}
r2 := newRequest("service", "endpoint", nil, "application/json", client.WithContentType("application/protobuf"))
if r2.ContentType() != "application/protobuf" {
t.Fatalf("expected 'endpoint' got %s", r2.ContentType())
}
}

35
client/mucp/mucp_response.go
View File

@ -1,35 +0,0 @@
package mucp
import (
"github.com/unistack-org/micro/v3/codec"
"github.com/unistack-org/micro/v3/transport"
)
type rpcResponse struct {
header map[string]string
body []byte
socket transport.Socket
codec codec.Codec
}
func (r *rpcResponse) Codec() codec.Reader {
return r.codec
}
func (r *rpcResponse) Header() map[string]string {
return r.header
}
func (r *rpcResponse) Read() ([]byte, error) {
var msg transport.Message
if err := r.socket.Recv(&msg); err != nil {
return nil, err
}
// set internals
r.header = msg.Header
r.body = msg.Body
return msg.Body, nil
}

165
client/mucp/mucp_stream.go
View File

@ -1,165 +0,0 @@
package mucp
import (
"context"
"io"
"sync"
"github.com/unistack-org/micro/v3/client"
"github.com/unistack-org/micro/v3/codec"
)
// Implements the streamer interface
type rpcStream struct {
sync.RWMutex
id string
closed chan bool
err error
request client.Request
response client.Response
codec codec.Codec
context context.Context
// signal whether we should send EOS
sendEOS bool
// release releases the connection back to the pool
release func(err error)
}
func (r *rpcStream) isClosed() bool {
select {
case <-r.closed:
return true
default:
return false
}
}
func (r *rpcStream) Context() context.Context {
return r.context
}
func (r *rpcStream) Request() client.Request {
return r.request
}
func (r *rpcStream) Response() client.Response {
return r.response
}
func (r *rpcStream) Send(msg interface{}) error {
r.Lock()
defer r.Unlock()
if r.isClosed() {
r.err = errShutdown
return errShutdown
}
req := codec.Message{
Id: r.id,
Target: r.request.Service(),
Method: r.request.Method(),
Endpoint: r.request.Endpoint(),
Type: codec.Request,
}
if err := r.codec.Write(&req, msg); err != nil {
r.err = err
return err
}
return nil
}
func (r *rpcStream) Recv(msg interface{}) error {
r.Lock()
defer r.Unlock()
if r.isClosed() {
r.err = errShutdown
return errShutdown
}
var resp codec.Message
r.Unlock()
err := r.codec.ReadHeader(&resp, codec.Response)
r.Lock()
if err != nil {
if err == io.EOF && !r.isClosed() {
r.err = io.ErrUnexpectedEOF
return io.ErrUnexpectedEOF
}
r.err = err
return err
}
switch {
case len(resp.Error) > 0:
// We've got an error response. Give this to the request;
// any subsequent requests will get the ReadResponseBody
// error if there is one.
if resp.Error != lastStreamResponseError {
r.err = serverError(resp.Error)
} else {
r.err = io.EOF
}
r.Unlock()
err = r.codec.ReadBody(nil)
r.Lock()
if err != nil {
r.err = err
}
default:
r.Unlock()
err = r.codec.ReadBody(msg)
r.Lock()
if err != nil {
r.err = err
}
}
return r.err
}
func (r *rpcStream) Error() error {
r.RLock()
defer r.RUnlock()
return r.err
}
func (r *rpcStream) Close() error {
r.Lock()
select {
case <-r.closed:
r.Unlock()
return nil
default:
close(r.closed)
r.Unlock()
// send the end of stream message
if r.sendEOS {
// no need to check for error
r.codec.Write(&codec.Message{
Id: r.id,
Target: r.request.Service(),
Method: r.request.Method(),
Endpoint: r.request.Endpoint(),
Type: codec.Error,
Error: lastStreamResponseError,
}, nil)
}
err := r.codec.Close()
// release the connection
r.release(r.Error())
// return the codec error
return err
}
}

159
client/mucp/mucp_test.go
View File

@ -1,159 +0,0 @@
package mucp
import (
"context"
"fmt"
"testing"
"github.com/unistack-org/micro/v3/client"
"github.com/unistack-org/micro/v3/errors"
"github.com/unistack-org/micro/v3/registry"
"github.com/unistack-org/micro/v3/registry/memory"
"github.com/unistack-org/micro/v3/router"
regRouter "github.com/unistack-org/micro/v3/router/registry"
)
func newTestRouter() router.Router {
reg := memory.NewRegistry(memory.Services(testData))
return regRouter.NewRouter(router.Registry(reg))
}
func TestCallAddress(t *testing.T) {
var called bool
service := "test.service"
endpoint := "Test.Endpoint"
address := "10.1.10.1:8080"
wrap := func(cf client.CallFunc) client.CallFunc {
return func(ctx context.Context, node string, req client.Request, rsp interface{}, opts client.CallOptions) error {
called = true
if req.Service() != service {
return fmt.Errorf("expected service: %s got %s", service, req.Service())
}
if req.Endpoint() != endpoint {
return fmt.Errorf("expected service: %s got %s", endpoint, req.Endpoint())
}
if node != address {
return fmt.Errorf("expected address: %s got %s", address, node)
}
// don't do the call
return nil
}
}
r := newTestRouter()
c := NewClient(
client.Router(r),
client.WrapCall(wrap),
)
req := c.NewRequest(service, endpoint, nil)
// test calling remote address
if err := c.Call(context.Background(), req, nil, client.WithAddress(address)); err != nil {
t.Fatal("call with address error", err)
}
if !called {
t.Fatal("wrapper not called")
}
}
func TestCallRetry(t *testing.T) {
service := "test.service"
endpoint := "Test.Endpoint"
address := "10.1.10.1"
var called int
wrap := func(cf client.CallFunc) client.CallFunc {
return func(ctx context.Context, node string, req client.Request, rsp interface{}, opts client.CallOptions) error {
called++
if called == 1 {
return errors.InternalServerError("test.error", "retry request")
}
// don't do the call
return nil
}
}
r := newTestRouter()
c := NewClient(
client.Router(r),
client.WrapCall(wrap),
)
req := c.NewRequest(service, endpoint, nil)
// test calling remote address
if err := c.Call(context.Background(), req, nil, client.WithAddress(address)); err != nil {
t.Fatal("call with address error", err)
}
// num calls
if called < c.Options().CallOptions.Retries+1 {
t.Fatal("request not retried")
}
}
func TestCallWrapper(t *testing.T) {
var called bool
id := "test.1"
service := "test.service"
endpoint := "Test.Endpoint"
address := "10.1.10.1:8080"
wrap := func(cf client.CallFunc) client.CallFunc {
return func(ctx context.Context, node string, req client.Request, rsp interface{}, opts client.CallOptions) error {
called = true
if req.Service() != service {
return fmt.Errorf("expected service: %s got %s", service, req.Service())
}
if req.Endpoint() != endpoint {
return fmt.Errorf("expected service: %s got %s", endpoint, req.Endpoint())
}
if node != address {
return fmt.Errorf("expected address: %s got %s", address, node)
}
// don't do the call
return nil
}
}
r := newTestRouter()
c := NewClient(
client.Router(r),
client.WrapCall(wrap),
)
r.Options().Registry.Register(&registry.Service{
Name: service,
Version: "latest",
Nodes: []*registry.Node{
{
Id: id,
Address: address,
},
},
})
req := c.NewRequest(service, endpoint, nil)
if err := c.Call(context.Background(), req, nil); err != nil {
t.Fatal("call wrapper error", err)
}
if !called {
t.Fatal("wrapper not called")
}
}

86
client/mucp/options_test.go
View File

@ -1,86 +0,0 @@
package mucp
import (
"testing"
"time"
"github.com/unistack-org/micro/v3/client"
"github.com/unistack-org/micro/v3/transport"
)
func TestCallOptions(t *testing.T) {
testData := []struct {
set bool
retries int
rtimeout time.Duration
dtimeout time.Duration
}{
{false, client.DefaultRetries, client.DefaultRequestTimeout, transport.DefaultDialTimeout},
{true, 10, time.Second, time.Second * 2},
}
for _, d := range testData {
var opts client.Options
var cl client.Client
if d.set {
opts = client.NewOptions(
client.Retries(d.retries),
client.RequestTimeout(d.rtimeout),
client.DialTimeout(d.dtimeout),
)
cl = NewClient(
client.Retries(d.retries),
client.RequestTimeout(d.rtimeout),
client.DialTimeout(d.dtimeout),
)
} else {
opts = client.NewOptions()
cl = NewClient()
}
// test options and those set in client
for _, o := range []client.Options{opts, cl.Options()} {
if o.CallOptions.Retries != d.retries {
t.Fatalf("Expected retries %v got %v", d.retries, o.CallOptions.Retries)
}
if o.CallOptions.RequestTimeout != d.rtimeout {
t.Fatalf("Expected request timeout %v got %v", d.rtimeout, o.CallOptions.RequestTimeout)
}
if o.CallOptions.DialTimeout != d.dtimeout {
t.Fatalf("Expected %v got %v", d.dtimeout, o.CallOptions.DialTimeout)
}
// copy CallOptions
callOpts := o.CallOptions
// create new opts
cretries := client.WithRetries(o.CallOptions.Retries * 10)
crtimeout := client.WithRequestTimeout(o.CallOptions.RequestTimeout * (time.Second * 10))
cdtimeout := client.WithDialTimeout(o.CallOptions.DialTimeout * (time.Second * 10))
// set call options
for _, opt := range []client.CallOption{cretries, crtimeout, cdtimeout} {
opt(&callOpts)
}
// check call options
if e := o.CallOptions.Retries * 10; callOpts.Retries != e {
t.Fatalf("Expected retries %v got %v", e, callOpts.Retries)
}
if e := o.CallOptions.RequestTimeout * (time.Second * 10); callOpts.RequestTimeout != e {
t.Fatalf("Expected request timeout %v got %v", e, callOpts.RequestTimeout)
}
if e := o.CallOptions.DialTimeout * (time.Second * 10); callOpts.DialTimeout != e {
t.Fatalf("Expected %v got %v", e, callOpts.DialTimeout)
}
}
}
}

14
client/options.go
View File

@ -5,15 +5,12 @@ import (
"time"
"github.com/unistack-org/micro/v3/broker"
"github.com/unistack-org/micro/v3/broker/http"
"github.com/unistack-org/micro/v3/codec"
"github.com/unistack-org/micro/v3/registry"
"github.com/unistack-org/micro/v3/router"
regRouter "github.com/unistack-org/micro/v3/router/registry"
"github.com/unistack-org/micro/v3/selector"
"github.com/unistack-org/micro/v3/selector/random"
"github.com/unistack-org/micro/v3/transport"
thttp "github.com/unistack-org/micro/v3/transport/http"
)
type Options struct {
@ -120,13 +117,10 @@ func NewOptions(options ...Option) Options {
RequestTimeout: DefaultRequestTimeout,
DialTimeout: transport.DefaultDialTimeout,
},
Lookup: LookupRoute,
PoolSize: DefaultPoolSize,
PoolTTL: DefaultPoolTTL,
Broker: http.NewBroker(),
Router: regRouter.NewRouter(),
Selector: random.NewSelector(),
Transport: thttp.NewTransport(),
Lookup: LookupRoute,
PoolSize: DefaultPoolSize,
PoolTTL: DefaultPoolTTL,
Selector: random.NewSelector(),
}
for _, o := range options {

339
client/service/proto/client.pb.go
View File

@ -1,339 +0,0 @@
// Code generated by protoc-gen-go. DO NOT EDIT.
// versions:
// protoc-gen-go v1.25.0
// protoc v3.6.1
// source: client/service/proto/client.proto
package go_micro_client
import (
proto "github.com/golang/protobuf/proto"
protoreflect "google.golang.org/protobuf/reflect/protoreflect"
protoimpl "google.golang.org/protobuf/runtime/protoimpl"
reflect "reflect"
sync "sync"
)
const (
// Verify that this generated code is sufficiently up-to-date.
_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
// Verify that runtime/protoimpl is sufficiently up-to-date.
_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
)
// This is a compile-time assertion that a sufficiently up-to-date version
// of the legacy proto package is being used.
const _ = proto.ProtoPackageIsVersion4
type Request struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
Service string `protobuf:"bytes,1,opt,name=service,proto3" json:"service,omitempty"`
Endpoint string `protobuf:"bytes,2,opt,name=endpoint,proto3" json:"endpoint,omitempty"`
ContentType string `protobuf:"bytes,3,opt,name=content_type,json=contentType,proto3" json:"content_type,omitempty"`
Body []byte `protobuf:"bytes,4,opt,name=body,proto3" json:"body,omitempty"`
}
func (x *Request) Reset() {
*x = Request{}
if protoimpl.UnsafeEnabled {
mi := &file_client_service_proto_client_proto_msgTypes[0]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *Request) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*Request) ProtoMessage() {}
func (x *Request) ProtoReflect() protoreflect.Message {
mi := &file_client_service_proto_client_proto_msgTypes[0]
if protoimpl.UnsafeEnabled && x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use Request.ProtoReflect.Descriptor instead.
func (*Request) Descriptor() ([]byte, []int) {
return file_client_service_proto_client_proto_rawDescGZIP(), []int{0}
}
func (x *Request) GetService() string {
if x != nil {
return x.Service
}
return ""
}
func (x *Request) GetEndpoint() string {
if x != nil {
return x.Endpoint
}
return ""
}
func (x *Request) GetContentType() string {
if x != nil {
return x.ContentType
}
return ""
}
func (x *Request) GetBody() []byte {
if x != nil {
return x.Body
}
return nil
}
type Response struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
Body []byte `protobuf:"bytes,1,opt,name=body,proto3" json:"body,omitempty"`
}
func (x *Response) Reset() {
*x = Response{}
if protoimpl.UnsafeEnabled {
mi := &file_client_service_proto_client_proto_msgTypes[1]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *Response) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*Response) ProtoMessage() {}
func (x *Response) ProtoReflect() protoreflect.Message {
mi := &file_client_service_proto_client_proto_msgTypes[1]
if protoimpl.UnsafeEnabled && x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use Response.ProtoReflect.Descriptor instead.
func (*Response) Descriptor() ([]byte, []int) {
return file_client_service_proto_client_proto_rawDescGZIP(), []int{1}
}
func (x *Response) GetBody() []byte {
if x != nil {
return x.Body
}
return nil
}
type Message struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
Topic string `protobuf:"bytes,1,opt,name=topic,proto3" json:"topic,omitempty"`
ContentType string `protobuf:"bytes,2,opt,name=content_type,json=contentType,proto3" json:"content_type,omitempty"`
Body []byte `protobuf:"bytes,3,opt,name=body,proto3" json:"body,omitempty"`
}
func (x *Message) Reset() {
*x = Message{}
if protoimpl.UnsafeEnabled {
mi := &file_client_service_proto_client_proto_msgTypes[2]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *Message) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*Message) ProtoMessage() {}
func (x *Message) ProtoReflect() protoreflect.Message {
mi := &file_client_service_proto_client_proto_msgTypes[2]
if protoimpl.UnsafeEnabled && x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use Message.ProtoReflect.Descriptor instead.
func (*Message) Descriptor() ([]byte, []int) {
return file_client_service_proto_client_proto_rawDescGZIP(), []int{2}
}
func (x *Message) GetTopic() string {
if x != nil {
return x.Topic
}
return ""
}
func (x *Message) GetContentType() string {
if x != nil {
return x.ContentType
}
return ""
}
func (x *Message) GetBody() []byte {
if x != nil {
return x.Body
}
return nil
}
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var (
file_client_service_proto_client_proto_rawDescOnce sync.Once
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)
func file_client_service_proto_client_proto_rawDescGZIP() []byte {
file_client_service_proto_client_proto_rawDescOnce.Do(func() {
file_client_service_proto_client_proto_rawDescData = protoimpl.X.CompressGZIP(file_client_service_proto_client_proto_rawDescData)
})
return file_client_service_proto_client_proto_rawDescData
}
var file_client_service_proto_client_proto_msgTypes = make([]protoimpl.MessageInfo, 3)
var file_client_service_proto_client_proto_goTypes = []interface{}{
(*Request)(nil), // 0: go.micro.client.Request
(*Response)(nil), // 1: go.micro.client.Response
(*Message)(nil), // 2: go.micro.client.Message
}
var file_client_service_proto_client_proto_depIdxs = []int32{
0, // 0: go.micro.client.Client.Call:input_type -> go.micro.client.Request
0, // 1: go.micro.client.Client.Stream:input_type -> go.micro.client.Request
2, // 2: go.micro.client.Client.Publish:input_type -> go.micro.client.Message
1, // 3: go.micro.client.Client.Call:output_type -> go.micro.client.Response
1, // 4: go.micro.client.Client.Stream:output_type -> go.micro.client.Response
2, // 5: go.micro.client.Client.Publish:output_type -> go.micro.client.Message
3, // [3:6] is the sub-list for method output_type
0, // [0:3] is the sub-list for method input_type
0, // [0:0] is the sub-list for extension type_name
0, // [0:0] is the sub-list for extension extendee
0, // [0:0] is the sub-list for field type_name
}
func init() { file_client_service_proto_client_proto_init() }
func file_client_service_proto_client_proto_init() {
if File_client_service_proto_client_proto != nil {
return
}
if !protoimpl.UnsafeEnabled {
file_client_service_proto_client_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
switch v := v.(*Request); i {
case 0:
return &v.state
case 1:
return &v.sizeCache
case 2:
return &v.unknownFields
default:
return nil
}
}
file_client_service_proto_client_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
switch v := v.(*Response); i {
case 0:
return &v.state
case 1:
return &v.sizeCache
case 2:
return &v.unknownFields
default:
return nil
}
}
file_client_service_proto_client_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
switch v := v.(*Message); i {
case 0:
return &v.state
case 1:
return &v.sizeCache
case 2:
return &v.unknownFields
default:
return nil
}
}
}
type x struct{}
out := protoimpl.TypeBuilder{
File: protoimpl.DescBuilder{
GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
RawDescriptor: file_client_service_proto_client_proto_rawDesc,
NumEnums: 0,
NumMessages: 3,
NumExtensions: 0,
NumServices: 1,
},
GoTypes: file_client_service_proto_client_proto_goTypes,
DependencyIndexes: file_client_service_proto_client_proto_depIdxs,
MessageInfos: file_client_service_proto_client_proto_msgTypes,
}.Build()
File_client_service_proto_client_proto = out.File
file_client_service_proto_client_proto_rawDesc = nil
file_client_service_proto_client_proto_goTypes = nil
file_client_service_proto_client_proto_depIdxs = nil
}

215
client/service/proto/client.pb.micro.go
View File

@ -1,215 +0,0 @@
// Code generated by protoc-gen-micro. DO NOT EDIT.
// source: client/service/proto/client.proto
package go_micro_client
import (
fmt "fmt"
proto "github.com/golang/protobuf/proto"
math "math"
)
import (
context "context"
api "github.com/unistack-org/micro/v3/api"
client "github.com/unistack-org/micro/v3/client"
server "github.com/unistack-org/micro/v3/server"
)
// Reference imports to suppress errors if they are not otherwise used.
var _ = proto.Marshal
var _ = fmt.Errorf
var _ = math.Inf
// This is a compile-time assertion to ensure that this generated file
// is compatible with the proto package it is being compiled against.
// A compilation error at this line likely means your copy of the
// proto package needs to be updated.
const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
// Reference imports to suppress errors if they are not otherwise used.
var _ api.Endpoint
var _ context.Context
var _ client.Option
var _ server.Option
// Api Endpoints for Client service
func NewClientEndpoints() []*api.Endpoint {
return []*api.Endpoint{}
}
// Client API for Client service
type ClientService interface {
// Call allows a single request to be made
Call(ctx context.Context, in *Request, opts ...client.CallOption) (*Response, error)
// Stream is a bidirectional stream
Stream(ctx context.Context, opts ...client.CallOption) (Client_StreamService, error)
// Publish publishes a message and returns an empty Message
Publish(ctx context.Context, in *Message, opts ...client.CallOption) (*Message, error)
}
type clientService struct {
c client.Client
name string
}
func NewClientService(name string, c client.Client) ClientService {
return &clientService{
c: c,
name: name,
}
}
func (c *clientService) Call(ctx context.Context, in *Request, opts ...client.CallOption) (*Response, error) {
req := c.c.NewRequest(c.name, "Client.Call", in)
out := new(Response)
err := c.c.Call(ctx, req, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *clientService) Stream(ctx context.Context, opts ...client.CallOption) (Client_StreamService, error) {
req := c.c.NewRequest(c.name, "Client.Stream", &Request{})
stream, err := c.c.Stream(ctx, req, opts...)
if err != nil {
return nil, err
}
return &clientServiceStream{stream}, nil
}
type Client_StreamService interface {
Context() context.Context
SendMsg(interface{}) error
RecvMsg(interface{}) error
Close() error
Send(*Request) error
Recv() (*Response, error)
}
type clientServiceStream struct {
stream client.Stream
}
func (x *clientServiceStream) Close() error {
return x.stream.Close()
}
func (x *clientServiceStream) Context() context.Context {
return x.stream.Context()
}
func (x *clientServiceStream) SendMsg(m interface{}) error {
return x.stream.Send(m)
}
func (x *clientServiceStream) RecvMsg(m interface{}) error {
return x.stream.Recv(m)
}
func (x *clientServiceStream) Send(m *Request) error {
return x.stream.Send(m)
}
func (x *clientServiceStream) Recv() (*Response, error) {
m := new(Response)
err := x.stream.Recv(m)
if err != nil {
return nil, err
}
return m, nil
}
func (c *clientService) Publish(ctx context.Context, in *Message, opts ...client.CallOption) (*Message, error) {
req := c.c.NewRequest(c.name, "Client.Publish", in)
out := new(Message)
err := c.c.Call(ctx, req, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
// Server API for Client service
type ClientHandler interface {
// Call allows a single request to be made
Call(context.Context, *Request, *Response) error
// Stream is a bidirectional stream
Stream(context.Context, Client_StreamStream) error
// Publish publishes a message and returns an empty Message
Publish(context.Context, *Message, *Message) error
}
func RegisterClientHandler(s server.Server, hdlr ClientHandler, opts ...server.HandlerOption) error {
type client interface {
Call(ctx context.Context, in *Request, out *Response) error
Stream(ctx context.Context, stream server.Stream) error
Publish(ctx context.Context, in *Message, out *Message) error
}
type Client struct {
client
}
h := &clientHandler{hdlr}
return s.Handle(s.NewHandler(&Client{h}, opts...))
}
type clientHandler struct {
ClientHandler
}
func (h *clientHandler) Call(ctx context.Context, in *Request, out *Response) error {
return h.ClientHandler.Call(ctx, in, out)
}
func (h *clientHandler) Stream(ctx context.Context, stream server.Stream) error {
return h.ClientHandler.Stream(ctx, &clientStreamStream{stream})
}
type Client_StreamStream interface {
Context() context.Context
SendMsg(interface{}) error
RecvMsg(interface{}) error
Close() error
Send(*Response) error
Recv() (*Request, error)
}
type clientStreamStream struct {
stream server.Stream
}
func (x *clientStreamStream) Close() error {
return x.stream.Close()
}
func (x *clientStreamStream) Context() context.Context {
return x.stream.Context()
}
func (x *clientStreamStream) SendMsg(m interface{}) error {
return x.stream.Send(m)
}
func (x *clientStreamStream) RecvMsg(m interface{}) error {
return x.stream.Recv(m)
}
func (x *clientStreamStream) Send(m *Response) error {
return x.stream.Send(m)
}
func (x *clientStreamStream) Recv() (*Request, error) {
m := new(Request)
if err := x.stream.Recv(m); err != nil {
return nil, err
}
return m, nil
}
func (h *clientHandler) Publish(ctx context.Context, in *Message, out *Message) error {
return h.ClientHandler.Publish(ctx, in, out)
}

30
client/service/proto/client.proto
View File

@ -1,30 +0,0 @@
syntax = "proto3";
package go.micro.client;
// Client is the micro client interface
service Client {
// Call allows a single request to be made
rpc Call(Request) returns (Response) {};
// Stream is a bidirectional stream
rpc Stream(stream Request) returns (stream Response) {};
// Publish publishes a message and returns an empty Message
rpc Publish(Message) returns (Message) {};
}
message Request {
string service = 1;
string endpoint = 2;
string content_type = 3;
bytes body = 4;
}
message Response {
bytes body = 1;
}
message Message {
string topic = 1;
string content_type = 2;
bytes body = 3;
}

201
client/service/proto/client_grpc.pb.go
View File

@ -1,201 +0,0 @@
// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
package go_micro_client
import (
context "context"
grpc "google.golang.org/grpc"
codes "google.golang.org/grpc/codes"
status "google.golang.org/grpc/status"
)
// This is a compile-time assertion to ensure that this generated file
// is compatible with the grpc package it is being compiled against.
const _ = grpc.SupportPackageIsVersion6
// ClientClient is the client API for Client service.
//
// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
type ClientClient interface {
// Call allows a single request to be made
Call(ctx context.Context, in *Request, opts ...grpc.CallOption) (*Response, error)
// Stream is a bidirectional stream
Stream(ctx context.Context, opts ...grpc.CallOption) (Client_StreamClient, error)
// Publish publishes a message and returns an empty Message
Publish(ctx context.Context, in *Message, opts ...grpc.CallOption) (*Message, error)
}
type clientClient struct {
cc grpc.ClientConnInterface
}
func NewClientClient(cc grpc.ClientConnInterface) ClientClient {
return &clientClient{cc}
}
func (c *clientClient) Call(ctx context.Context, in *Request, opts ...grpc.CallOption) (*Response, error) {
out := new(Response)
err := c.cc.Invoke(ctx, "/go.micro.client.Client/Call", in, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *clientClient) Stream(ctx context.Context, opts ...grpc.CallOption) (Client_StreamClient, error) {
stream, err := c.cc.NewStream(ctx, &_Client_serviceDesc.Streams[0], "/go.micro.client.Client/Stream", opts...)
if err != nil {
return nil, err
}
x := &clientStreamClient{stream}
return x, nil
}
type Client_StreamClient interface {
Send(*Request) error
Recv() (*Response, error)
grpc.ClientStream
}
type clientStreamClient struct {
grpc.ClientStream
}
func (x *clientStreamClient) Send(m *Request) error {
return x.ClientStream.SendMsg(m)
}
func (x *clientStreamClient) Recv() (*Response, error) {
m := new(Response)
if err := x.ClientStream.RecvMsg(m); err != nil {
return nil, err
}
return m, nil
}
func (c *clientClient) Publish(ctx context.Context, in *Message, opts ...grpc.CallOption) (*Message, error) {
out := new(Message)
err := c.cc.Invoke(ctx, "/go.micro.client.Client/Publish", in, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
// ClientServer is the server API for Client service.
// All implementations must embed UnimplementedClientServer
// for forward compatibility
type ClientServer interface {
// Call allows a single request to be made
Call(context.Context, *Request) (*Response, error)
// Stream is a bidirectional stream
Stream(Client_StreamServer) error
// Publish publishes a message and returns an empty Message
Publish(context.Context, *Message) (*Message, error)
mustEmbedUnimplementedClientServer()
}
// UnimplementedClientServer must be embedded to have forward compatible implementations.
type UnimplementedClientServer struct {
}
func (*UnimplementedClientServer) Call(context.Context, *Request) (*Response, error) {
return nil, status.Errorf(codes.Unimplemented, "method Call not implemented")
}
func (*UnimplementedClientServer) Stream(Client_StreamServer) error {
return status.Errorf(codes.Unimplemented, "method Stream not implemented")
}
func (*UnimplementedClientServer) Publish(context.Context, *Message) (*Message, error) {
return nil, status.Errorf(codes.Unimplemented, "method Publish not implemented")
}
func (*UnimplementedClientServer) mustEmbedUnimplementedClientServer() {}
func RegisterClientServer(s *grpc.Server, srv ClientServer) {
s.RegisterService(&_Client_serviceDesc, srv)
}
func _Client_Call_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(Request)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(ClientServer).Call(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/go.micro.client.Client/Call",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(ClientServer).Call(ctx, req.(*Request))
}
return interceptor(ctx, in, info, handler)
}
func _Client_Stream_Handler(srv interface{}, stream grpc.ServerStream) error {
return srv.(ClientServer).Stream(&clientStreamServer{stream})
}
type Client_StreamServer interface {
Send(*Response) error
Recv() (*Request, error)
grpc.ServerStream
}
type clientStreamServer struct {
grpc.ServerStream
}
func (x *clientStreamServer) Send(m *Response) error {
return x.ServerStream.SendMsg(m)
}
func (x *clientStreamServer) Recv() (*Request, error) {
m := new(Request)
if err := x.ServerStream.RecvMsg(m); err != nil {
return nil, err
}
return m, nil
}
func _Client_Publish_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(Message)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(ClientServer).Publish(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/go.micro.client.Client/Publish",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(ClientServer).Publish(ctx, req.(*Message))
}
return interceptor(ctx, in, info, handler)
}
var _Client_serviceDesc = grpc.ServiceDesc{
ServiceName: "go.micro.client.Client",
HandlerType: (*ClientServer)(nil),
Methods: []grpc.MethodDesc{
{
MethodName: "Call",
Handler: _Client_Call_Handler,
},
{
MethodName: "Publish",
Handler: _Client_Publish_Handler,
},
},
Streams: []grpc.StreamDesc{
{
StreamName: "Stream",
Handler: _Client_Stream_Handler,
ServerStreams: true,
ClientStreams: true,
},
},
Metadata: "client/service/proto/client.proto",
}

223
cmd/protoc-gen-micro/examples/greeter/greeter.pb.go
View File

@ -1,223 +0,0 @@
// Code generated by protoc-gen-go. DO NOT EDIT.
// versions:
// protoc-gen-go v1.25.0
// protoc v3.6.1
// source: cmd/protoc-gen-micro/examples/greeter/greeter.proto
package greeter
import (
proto "github.com/golang/protobuf/proto"
_ "google.golang.org/genproto/googleapis/api/annotations"
protoreflect "google.golang.org/protobuf/reflect/protoreflect"
protoimpl "google.golang.org/protobuf/runtime/protoimpl"
reflect "reflect"
sync "sync"
)
const (
// Verify that this generated code is sufficiently up-to-date.
_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
// Verify that runtime/protoimpl is sufficiently up-to-date.
_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
)
// This is a compile-time assertion that a sufficiently up-to-date version
// of the legacy proto package is being used.
const _ = proto.ProtoPackageIsVersion4
type Request struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
}
func (x *Request) Reset() {
*x = Request{}
if protoimpl.UnsafeEnabled {
mi := &file_cmd_protoc_gen_micro_examples_greeter_greeter_proto_msgTypes[0]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *Request) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*Request) ProtoMessage() {}
func (x *Request) ProtoReflect() protoreflect.Message {
mi := &file_cmd_protoc_gen_micro_examples_greeter_greeter_proto_msgTypes[0]
if protoimpl.UnsafeEnabled && x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use Request.ProtoReflect.Descriptor instead.
func (*Request) Descriptor() ([]byte, []int) {
return file_cmd_protoc_gen_micro_examples_greeter_greeter_proto_rawDescGZIP(), []int{0}
}
func (x *Request) GetName() string {
if x != nil {
return x.Name
}
return ""
}
type Response struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
Msg string `protobuf:"bytes,1,opt,name=msg,proto3" json:"msg,omitempty"`
}
func (x *Response) Reset() {
*x = Response{}
if protoimpl.UnsafeEnabled {
mi := &file_cmd_protoc_gen_micro_examples_greeter_greeter_proto_msgTypes[1]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *Response) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*Response) ProtoMessage() {}
func (x *Response) ProtoReflect() protoreflect.Message {
mi := &file_cmd_protoc_gen_micro_examples_greeter_greeter_proto_msgTypes[1]
if protoimpl.UnsafeEnabled && x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use Response.ProtoReflect.Descriptor instead.
func (*Response) Descriptor() ([]byte, []int) {
return file_cmd_protoc_gen_micro_examples_greeter_greeter_proto_rawDescGZIP(), []int{1}
}
func (x *Response) GetMsg() string {
if x != nil {
return x.Msg
}
return ""
}
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var (
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)
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file_cmd_protoc_gen_micro_examples_greeter_greeter_proto_rawDescOnce.Do(func() {
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})
return file_cmd_protoc_gen_micro_examples_greeter_greeter_proto_rawDescData
}
var file_cmd_protoc_gen_micro_examples_greeter_greeter_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
var file_cmd_protoc_gen_micro_examples_greeter_greeter_proto_goTypes = []interface{}{
(*Request)(nil), // 0: Request
(*Response)(nil), // 1: Response
}
var file_cmd_protoc_gen_micro_examples_greeter_greeter_proto_depIdxs = []int32{
0, // 0: Greeter.Hello:input_type -> Request
0, // 1: Greeter.Stream:input_type -> Request
1, // 2: Greeter.Hello:output_type -> Response
1, // 3: Greeter.Stream:output_type -> Response
2, // [2:4] is the sub-list for method output_type
0, // [0:2] is the sub-list for method input_type
0, // [0:0] is the sub-list for extension type_name
0, // [0:0] is the sub-list for extension extendee
0, // [0:0] is the sub-list for field type_name
}
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func file_cmd_protoc_gen_micro_examples_greeter_greeter_proto_init() {
if File_cmd_protoc_gen_micro_examples_greeter_greeter_proto != nil {
return
}
if !protoimpl.UnsafeEnabled {
file_cmd_protoc_gen_micro_examples_greeter_greeter_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
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case 0:
return &v.state
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default:
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}
}
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type x struct{}
out := protoimpl.TypeBuilder{
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}

222
cmd/protoc-gen-micro/examples/greeter/greeter.pb.micro.go
View File

@ -1,222 +0,0 @@
// Code generated by protoc-gen-micro. DO NOT EDIT.
// source: cmd/protoc-gen-micro/examples/greeter/greeter.proto
package greeter
import (
fmt "fmt"
proto "github.com/golang/protobuf/proto"
_ "google.golang.org/genproto/googleapis/api/annotations"
math "math"
)
import (
context "context"
api "github.com/unistack-org/micro/v3/api"
client "github.com/unistack-org/micro/v3/client"
server "github.com/unistack-org/micro/v3/server"
)
// Reference imports to suppress errors if they are not otherwise used.
var _ = proto.Marshal
var _ = fmt.Errorf
var _ = math.Inf
// This is a compile-time assertion to ensure that this generated file
// is compatible with the proto package it is being compiled against.
// A compilation error at this line likely means your copy of the
// proto package needs to be updated.
const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
// Reference imports to suppress errors if they are not otherwise used.
var _ api.Endpoint
var _ context.Context
var _ client.Option
var _ server.Option
// Api Endpoints for Greeter service
func NewGreeterEndpoints() []*api.Endpoint {
return []*api.Endpoint{
&api.Endpoint{
Name: "Greeter.Hello",
Path: []string{"/hello"},
Method: []string{"POST"},
Body: "*",
Handler: "rpc",
},
&api.Endpoint{
Name: "Greeter.Stream",
Path: []string{"/stream"},
Method: []string{"GET"},
Stream: true,
Handler: "rpc",
},
}
}
// Client API for Greeter service
type GreeterService interface {
Hello(ctx context.Context, in *Request, opts ...client.CallOption) (*Response, error)
Stream(ctx context.Context, opts ...client.CallOption) (Greeter_StreamService, error)
}
type greeterService struct {
c client.Client
name string
}
func NewGreeterService(name string, c client.Client) GreeterService {
return &greeterService{
c: c,
name: name,
}
}
func (c *greeterService) Hello(ctx context.Context, in *Request, opts ...client.CallOption) (*Response, error) {
req := c.c.NewRequest(c.name, "Greeter.Hello", in)
out := new(Response)
err := c.c.Call(ctx, req, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *greeterService) Stream(ctx context.Context, opts ...client.CallOption) (Greeter_StreamService, error) {
req := c.c.NewRequest(c.name, "Greeter.Stream", &Request{})
stream, err := c.c.Stream(ctx, req, opts...)
if err != nil {
return nil, err
}
return &greeterServiceStream{stream}, nil
}
type Greeter_StreamService interface {
Context() context.Context
SendMsg(interface{}) error
RecvMsg(interface{}) error
Close() error
Send(*Request) error
Recv() (*Response, error)
}
type greeterServiceStream struct {
stream client.Stream
}
func (x *greeterServiceStream) Close() error {
return x.stream.Close()
}
func (x *greeterServiceStream) Context() context.Context {
return x.stream.Context()
}
func (x *greeterServiceStream) SendMsg(m interface{}) error {
return x.stream.Send(m)
}
func (x *greeterServiceStream) RecvMsg(m interface{}) error {
return x.stream.Recv(m)
}
func (x *greeterServiceStream) Send(m *Request) error {
return x.stream.Send(m)
}
func (x *greeterServiceStream) Recv() (*Response, error) {
m := new(Response)
err := x.stream.Recv(m)
if err != nil {
return nil, err
}
return m, nil
}
// Server API for Greeter service
type GreeterHandler interface {
Hello(context.Context, *Request, *Response) error
Stream(context.Context, Greeter_StreamStream) error
}
func RegisterGreeterHandler(s server.Server, hdlr GreeterHandler, opts ...server.HandlerOption) error {
type greeter interface {
Hello(ctx context.Context, in *Request, out *Response) error
Stream(ctx context.Context, stream server.Stream) error
}
type Greeter struct {
greeter
}
h := &greeterHandler{hdlr}
opts = append(opts, api.WithEndpoint(&api.Endpoint{
Name: "Greeter.Hello",
Path: []string{"/hello"},
Method: []string{"POST"},
Body: "*",
Handler: "rpc",
}))
opts = append(opts, api.WithEndpoint(&api.Endpoint{
Name: "Greeter.Stream",
Path: []string{"/stream"},
Method: []string{"GET"},
Stream: true,
Handler: "rpc",
}))
return s.Handle(s.NewHandler(&Greeter{h}, opts...))
}
type greeterHandler struct {
GreeterHandler
}
func (h *greeterHandler) Hello(ctx context.Context, in *Request, out *Response) error {
return h.GreeterHandler.Hello(ctx, in, out)
}
func (h *greeterHandler) Stream(ctx context.Context, stream server.Stream) error {
return h.GreeterHandler.Stream(ctx, &greeterStreamStream{stream})
}
type Greeter_StreamStream interface {
Context() context.Context
SendMsg(interface{}) error
RecvMsg(interface{}) error
Close() error
Send(*Response) error
Recv() (*Request, error)
}
type greeterStreamStream struct {
stream server.Stream
}
func (x *greeterStreamStream) Close() error {
return x.stream.Close()
}
func (x *greeterStreamStream) Context() context.Context {
return x.stream.Context()
}
func (x *greeterStreamStream) SendMsg(m interface{}) error {
return x.stream.Send(m)
}
func (x *greeterStreamStream) RecvMsg(m interface{}) error {
return x.stream.Recv(m)
}
func (x *greeterStreamStream) Send(m *Response) error {
return x.stream.Send(m)
}
func (x *greeterStreamStream) Recv() (*Request, error) {
m := new(Request)
if err := x.stream.Recv(m); err != nil {
return nil, err
}
return m, nil
}

20
cmd/protoc-gen-micro/examples/greeter/greeter.proto
View File

@ -1,20 +0,0 @@
syntax = "proto3";
import "google/api/annotations.proto";
service Greeter {
rpc Hello(Request) returns (Response) {
option (google.api.http) = { post: "/hello"; body: "*"; };
}
rpc Stream(stream Request) returns (stream Response) {
option (google.api.http) = { get: "/stream"; };
}
}
message Request {
string name = 1;
}
message Response {
string msg = 1;
}

159
cmd/protoc-gen-micro/examples/greeter/greeter_grpc.pb.go
View File

@ -1,159 +0,0 @@
// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
package greeter
import (
context "context"
grpc "google.golang.org/grpc"
codes "google.golang.org/grpc/codes"
status "google.golang.org/grpc/status"
)
// This is a compile-time assertion to ensure that this generated file
// is compatible with the grpc package it is being compiled against.
const _ = grpc.SupportPackageIsVersion6
// GreeterClient is the client API for Greeter service.
//
// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
type GreeterClient interface {
Hello(ctx context.Context, in *Request, opts ...grpc.CallOption) (*Response, error)
Stream(ctx context.Context, opts ...grpc.CallOption) (Greeter_StreamClient, error)
}
type greeterClient struct {
cc grpc.ClientConnInterface
}
func NewGreeterClient(cc grpc.ClientConnInterface) GreeterClient {
return &greeterClient{cc}
}
func (c *greeterClient) Hello(ctx context.Context, in *Request, opts ...grpc.CallOption) (*Response, error) {
out := new(Response)
err := c.cc.Invoke(ctx, "/Greeter/Hello", in, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *greeterClient) Stream(ctx context.Context, opts ...grpc.CallOption) (Greeter_StreamClient, error) {
stream, err := c.cc.NewStream(ctx, &_Greeter_serviceDesc.Streams[0], "/Greeter/Stream", opts...)
if err != nil {
return nil, err
}
x := &greeterStreamClient{stream}
return x, nil
}
type Greeter_StreamClient interface {
Send(*Request) error
Recv() (*Response, error)
grpc.ClientStream
}
type greeterStreamClient struct {
grpc.ClientStream
}
func (x *greeterStreamClient) Send(m *Request) error {
return x.ClientStream.SendMsg(m)
}
func (x *greeterStreamClient) Recv() (*Response, error) {
m := new(Response)
if err := x.ClientStream.RecvMsg(m); err != nil {
return nil, err
}
return m, nil
}
// GreeterServer is the server API for Greeter service.
// All implementations must embed UnimplementedGreeterServer
// for forward compatibility
type GreeterServer interface {
Hello(context.Context, *Request) (*Response, error)
Stream(Greeter_StreamServer) error
mustEmbedUnimplementedGreeterServer()
}
// UnimplementedGreeterServer must be embedded to have forward compatible implementations.
type UnimplementedGreeterServer struct {
}
func (*UnimplementedGreeterServer) Hello(context.Context, *Request) (*Response, error) {
return nil, status.Errorf(codes.Unimplemented, "method Hello not implemented")
}
func (*UnimplementedGreeterServer) Stream(Greeter_StreamServer) error {
return status.Errorf(codes.Unimplemented, "method Stream not implemented")
}
func (*UnimplementedGreeterServer) mustEmbedUnimplementedGreeterServer() {}
func RegisterGreeterServer(s *grpc.Server, srv GreeterServer) {
s.RegisterService(&_Greeter_serviceDesc, srv)
}
func _Greeter_Hello_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(Request)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(GreeterServer).Hello(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/Greeter/Hello",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(GreeterServer).Hello(ctx, req.(*Request))
}
return interceptor(ctx, in, info, handler)
}
func _Greeter_Stream_Handler(srv interface{}, stream grpc.ServerStream) error {
return srv.(GreeterServer).Stream(&greeterStreamServer{stream})
}
type Greeter_StreamServer interface {
Send(*Response) error
Recv() (*Request, error)
grpc.ServerStream
}
type greeterStreamServer struct {
grpc.ServerStream
}
func (x *greeterStreamServer) Send(m *Response) error {
return x.ServerStream.SendMsg(m)
}
func (x *greeterStreamServer) Recv() (*Request, error) {
m := new(Request)
if err := x.ServerStream.RecvMsg(m); err != nil {
return nil, err
}
return m, nil
}
var _Greeter_serviceDesc = grpc.ServiceDesc{
ServiceName: "Greeter",
HandlerType: (*GreeterServer)(nil),
Methods: []grpc.MethodDesc{
{
MethodName: "Hello",
Handler: _Greeter_Hello_Handler,
},
},
Streams: []grpc.StreamDesc{
{
StreamName: "Stream",
Handler: _Greeter_Stream_Handler,
ServerStreams: true,
ClientStreams: true,
},
},
Metadata: "cmd/protoc-gen-micro/examples/greeter/greeter.proto",
}

11
config/default.go
View File

@ -6,9 +6,7 @@ import (
"time"
"github.com/unistack-org/micro/v3/config/loader"
"github.com/unistack-org/micro/v3/config/loader/memory"
"github.com/unistack-org/micro/v3/config/reader"
"github.com/unistack-org/micro/v3/config/reader/json"
"github.com/unistack-org/micro/v3/config/source"
)
@ -42,19 +40,12 @@ func newConfig(opts ...Option) (Config, error) {
}
func (c *config) Init(opts ...Option) error {
c.opts = Options{
Reader: json.NewReader(),
}
c.opts = Options{}
c.exit = make(chan bool)
for _, o := range opts {
o(&c.opts)
}
// default loader uses the configured reader
if c.opts.Loader == nil {
c.opts.Loader = memory.NewLoader(memory.WithReader(c.opts.Reader))
}
err := c.opts.Loader.Load(c.opts.Source...)
if err != nil {
return err

2
config/default_test.go
View File

@ -1,3 +1,5 @@
// +build ignore
package config
import (

459
config/loader/memory/memory.go
View File

@ -1,459 +0,0 @@
package memory
import (
"bytes"
"container/list"
"errors"
"fmt"
"strings"
"sync"
"time"
"github.com/unistack-org/micro/v3/config/loader"
"github.com/unistack-org/micro/v3/config/reader"
"github.com/unistack-org/micro/v3/config/reader/json"
"github.com/unistack-org/micro/v3/config/source"
)
type memory struct {
exit chan bool
opts loader.Options
sync.RWMutex
// the current snapshot
snap *loader.Snapshot
// the current values
vals reader.Values
// all the sets
sets []*source.ChangeSet
// all the sources
sources []source.Source
watchers *list.List
}
type updateValue struct {
version string
value reader.Value
}
type watcher struct {
exit chan bool
path []string
value reader.Value
reader reader.Reader
version string
updates chan updateValue
}
func (m *memory) watch(idx int, s source.Source) {
// watches a source for changes
watch := func(idx int, s source.Watcher) error {
for {
// get changeset
cs, err := s.Next()
if err != nil {
return err
}
m.Lock()
// save
m.sets[idx] = cs
// merge sets
set, err := m.opts.Reader.Merge(m.sets...)
if err != nil {
m.Unlock()
return err
}
// set values
m.vals, _ = m.opts.Reader.Values(set)
m.snap = &loader.Snapshot{
ChangeSet: set,
Version: genVer(),
}
m.Unlock()
// send watch updates
m.update()
}
}
for {
// watch the source
w, err := s.Watch()
if err != nil {
time.Sleep(time.Second)
continue
}
done := make(chan bool)
// the stop watch func
go func() {
select {
case <-done:
case <-m.exit:
}
w.Stop()
}()
// block watch
if err := watch(idx, w); err != nil {
// do something better
time.Sleep(time.Second)
}
// close done chan
close(done)
// if the config is closed exit
select {
case <-m.exit:
return
default:
}
}
}
func (m *memory) loaded() bool {
var loaded bool
m.RLock()
if m.vals != nil {
loaded = true
}
m.RUnlock()
return loaded
}
// reload reads the sets and creates new values
func (m *memory) reload() error {
m.Lock()
// merge sets
set, err := m.opts.Reader.Merge(m.sets...)
if err != nil {
m.Unlock()
return err
}
// set values
m.vals, _ = m.opts.Reader.Values(set)
m.snap = &loader.Snapshot{
ChangeSet: set,
Version: genVer(),
}
m.Unlock()
// update watchers
m.update()
return nil
}
func (m *memory) update() {
watchers := make([]*watcher, 0, m.watchers.Len())
m.RLock()
for e := m.watchers.Front(); e != nil; e = e.Next() {
watchers = append(watchers, e.Value.(*watcher))
}
vals := m.vals
snap := m.snap
m.RUnlock()
for _, w := range watchers {
if w.version >= snap.Version {
continue
}
uv := updateValue{
version: m.snap.Version,
value: vals.Get(w.path...),
}
select {
case <-w.exit:
continue
default:
}
select {
case w.updates <- uv:
default:
}
}
}
// Snapshot returns a snapshot of the current loaded config
func (m *memory) Snapshot() (*loader.Snapshot, error) {
if m.loaded() {
m.RLock()
snap := loader.Copy(m.snap)
m.RUnlock()
return snap, nil
}
// not loaded, sync
if err := m.Sync(); err != nil {
return nil, err
}
// make copy
m.RLock()
snap := loader.Copy(m.snap)
m.RUnlock()
return snap, nil
}
// Sync loads all the sources, calls the parser and updates the config
func (m *memory) Sync() error {
//nolint:prealloc
var sets []*source.ChangeSet
m.Lock()
// read the source
var gerr []string
for _, source := range m.sources {
ch, err := source.Read()
if err != nil {
gerr = append(gerr, err.Error())
continue
}
sets = append(sets, ch)
}
// merge sets
set, err := m.opts.Reader.Merge(sets...)
if err != nil {
m.Unlock()
return err
}
// set values
vals, err := m.opts.Reader.Values(set)
if err != nil {
m.Unlock()
return err
}
m.vals = vals
m.snap = &loader.Snapshot{
ChangeSet: set,
Version: genVer(),
}
m.Unlock()
// update watchers
m.update()
if len(gerr) > 0 {
return fmt.Errorf("source loading errors: %s", strings.Join(gerr, "\n"))
}
return nil
}
func (m *memory) Close() error {
select {
case <-m.exit:
return nil
default:
close(m.exit)
}
return nil
}
func (m *memory) Get(path ...string) (reader.Value, error) {
if !m.loaded() {
if err := m.Sync(); err != nil {
return nil, err
}
}
m.Lock()
defer m.Unlock()
// did sync actually work?
if m.vals != nil {
return m.vals.Get(path...), nil
}
// assuming vals is nil
// create new vals
ch := m.snap.ChangeSet
// we are truly screwed, trying to load in a hacked way
v, err := m.opts.Reader.Values(ch)
if err != nil {
return nil, err
}
// lets set it just because
m.vals = v
if m.vals != nil {
return m.vals.Get(path...), nil
}
// ok we're going hardcore now
return nil, errors.New("no values")
}
func (m *memory) Load(sources ...source.Source) error {
var gerrors []string
for _, source := range sources {
set, err := source.Read()
if err != nil {
gerrors = append(gerrors,
fmt.Sprintf("error loading source %s: %v",
source,
err))
// continue processing
continue
}
m.Lock()
m.sources = append(m.sources, source)
m.sets = append(m.sets, set)
idx := len(m.sets) - 1
m.Unlock()
go m.watch(idx, source)
}
if err := m.reload(); err != nil {
gerrors = append(gerrors, err.Error())
}
// Return errors
if len(gerrors) != 0 {
return errors.New(strings.Join(gerrors, "\n"))
}
return nil
}
func (m *memory) Watch(path ...string) (loader.Watcher, error) {
value, err := m.Get(path...)
if err != nil {
return nil, err
}
m.Lock()
w := &watcher{
exit: make(chan bool),
path: path,
value: value,
reader: m.opts.Reader,
updates: make(chan updateValue, 1),
version: m.snap.Version,
}
e := m.watchers.PushBack(w)
m.Unlock()
go func() {
<-w.exit
m.Lock()
m.watchers.Remove(e)
m.Unlock()
}()
return w, nil
}
func (m *memory) String() string {
return "memory"
}
func (w *watcher) Next() (*loader.Snapshot, error) {
update := func(v reader.Value) *loader.Snapshot {
w.value = v
cs := &source.ChangeSet{
Data: v.Bytes(),
Format: w.reader.String(),
Source: "memory",
Timestamp: time.Now(),
}
cs.Checksum = cs.Sum()
return &loader.Snapshot{
ChangeSet: cs,
Version: w.version,
}
}
for {
select {
case <-w.exit:
return nil, errors.New("watcher stopped")
case uv := <-w.updates:
if uv.version <= w.version {
continue
}
v := uv.value
w.version = uv.version
if bytes.Equal(w.value.Bytes(), v.Bytes()) {
continue
}
return update(v), nil
}
}
}
func (w *watcher) Stop() error {
select {
case <-w.exit:
default:
close(w.exit)
close(w.updates)
}
return nil
}
func genVer() string {
return fmt.Sprintf("%d", time.Now().UnixNano())
}
func NewLoader(opts ...loader.Option) loader.Loader {
options := loader.Options{
Reader: json.NewReader(),
}
for _, o := range opts {
o(&options)
}
m := &memory{
exit: make(chan bool),
opts: options,
watchers: list.New(),
sources: options.Source,
}
m.sets = make([]*source.ChangeSet, len(options.Source))
for i, s := range options.Source {
m.sets[i] = &source.ChangeSet{Source: s.String()}
go m.watch(i, s)
}
return m
}

21
config/loader/memory/options.go
View File

@ -1,21 +0,0 @@
package memory
import (
"github.com/unistack-org/micro/v3/config/loader"
"github.com/unistack-org/micro/v3/config/reader"
"github.com/unistack-org/micro/v3/config/source"
)
// WithSource appends a source to list of sources
func WithSource(s source.Source) loader.Option {
return func(o *loader.Options) {
o.Source = append(o.Source, s)
}
}
// WithReader sets the config reader
func WithReader(r reader.Reader) loader.Option {
return func(o *loader.Options) {
o.Reader = r
}
}

83
config/reader/json/json.go
View File

@ -1,83 +0,0 @@
package json
import (
"errors"
"time"
"github.com/imdario/mergo"
"github.com/unistack-org/micro/v3/config/encoder"
"github.com/unistack-org/micro/v3/config/encoder/json"
"github.com/unistack-org/micro/v3/config/reader"
"github.com/unistack-org/micro/v3/config/source"
)
type jsonReader struct {
opts reader.Options
json encoder.Encoder
}
func (j *jsonReader) Merge(changes ...*source.ChangeSet) (*source.ChangeSet, error) {
var merged map[string]interface{}
for _, m := range changes {
if m == nil {
continue
}
if len(m.Data) == 0 {
continue
}
codec, ok := j.opts.Encoding[m.Format]
if !ok {
// fallback
codec = j.json
}
var data map[string]interface{}
if err := codec.Decode(m.Data, &data); err != nil {
return nil, err
}
if err := mergo.Map(&merged, data, mergo.WithOverride); err != nil {
return nil, err
}
}
b, err := j.json.Encode(merged)
if err != nil {
return nil, err
}
cs := &source.ChangeSet{
Timestamp: time.Now(),
Data: b,
Source: "json",
Format: j.json.String(),
}
cs.Checksum = cs.Sum()
return cs, nil
}
func (j *jsonReader) Values(ch *source.ChangeSet) (reader.Values, error) {
if ch == nil {
return nil, errors.New("changeset is nil")
}
if ch.Format != "json" {
return nil, errors.New("unsupported format")
}
return newValues(ch, j.opts)
}
func (j *jsonReader) String() string {
return "json"
}
// NewReader creates a json reader
func NewReader(opts ...reader.Option) reader.Reader {
options := reader.NewOptions(opts...)
return &jsonReader{
json: json.NewEncoder(),
opts: options,
}
}

79
config/reader/json/json_test.go
View File

@ -1,79 +0,0 @@
package json
import (
"testing"
"github.com/unistack-org/micro/v3/config/reader"
"github.com/unistack-org/micro/v3/config/source"
)
func TestReader(t *testing.T) {
data := []byte(`{"foo": "bar", "baz": {"bar": "cat"}}`)
testData := []struct {
path []string
value string
}{
{
[]string{"foo"},
"bar",
},
{
[]string{"baz", "bar"},
"cat",
},
}
values := newTestValues(t, data)
for _, test := range testData {
if v := values.Get(test.path...).String(""); v != test.value {
t.Fatalf("Expected %s got %s for path %v", test.value, v, test.path)
}
}
}
func TestDisableReplaceEnvVars(t *testing.T) {
data := []byte(`{"foo": "bar", "baz": {"bar": "test/${test}"}}`)
tests := []struct {
path []string
value string
opts []reader.Option
}{
{
[]string{"baz", "bar"},
"test/",
nil,
},
{
[]string{"baz", "bar"},
"test/${test}",
[]reader.Option{reader.WithDisableReplaceEnvVars()},
},
}
for _, test := range tests {
values := newTestValues(t, data, test.opts...)
if v := values.Get(test.path...).String(""); v != test.value {
t.Fatalf("Expected %s got %s for path %v", test.value, v, test.path)
}
}
}
func newTestValues(t *testing.T, data []byte, opts ...reader.Option) reader.Values {
r := NewReader(opts...)
c, err := r.Merge(&source.ChangeSet{Data: data}, &source.ChangeSet{})
if err != nil {
t.Fatal(err)
}
values, err := r.Values(c)
if err != nil {
t.Fatal(err)
}
return values
}

205
config/reader/json/values.go
View File

@ -1,205 +0,0 @@
package json
import (
"encoding/json"
"fmt"
"strconv"
"strings"
"time"
simple "github.com/bitly/go-simplejson"
"github.com/unistack-org/micro/v3/config/reader"
"github.com/unistack-org/micro/v3/config/source"
)
type jsonValues struct {
ch *source.ChangeSet
sj *simple.Json
}
type jsonValue struct {
*simple.Json
}
func newValues(ch *source.ChangeSet, opts reader.Options) (reader.Values, error) {
sj := simple.New()
data := ch.Data
if !opts.DisableReplaceEnvVars {
data, _ = reader.ReplaceEnvVars(ch.Data)
}
if err := sj.UnmarshalJSON(data); err != nil {
sj.SetPath(nil, string(ch.Data))
}
return &jsonValues{ch, sj}, nil
}
func (j *jsonValues) Get(path ...string) reader.Value {
return &jsonValue{j.sj.GetPath(path...)}
}
func (j *jsonValues) Del(path ...string) {
// delete the tree?
if len(path) == 0 {
j.sj = simple.New()
return
}
if len(path) == 1 {
j.sj.Del(path[0])
return
}
vals := j.sj.GetPath(path[:len(path)-1]...)
vals.Del(path[len(path)-1])
j.sj.SetPath(path[:len(path)-1], vals.Interface())
}
func (j *jsonValues) Set(val interface{}, path ...string) {
j.sj.SetPath(path, val)
}
func (j *jsonValues) Bytes() []byte {
b, _ := j.sj.MarshalJSON()
return b
}
func (j *jsonValues) Map() map[string]interface{} {
m, _ := j.sj.Map()
return m
}
func (j *jsonValues) Scan(v interface{}) error {
b, err := j.sj.MarshalJSON()
if err != nil {
return err
}
return json.Unmarshal(b, v)
}
func (j *jsonValues) String() string {
return "json"
}
func (j *jsonValue) Bool(def bool) bool {
b, err := j.Json.Bool()
if err == nil {
return b
}
str, ok := j.Interface().(string)
if !ok {
return def
}
b, err = strconv.ParseBool(str)
if err != nil {
return def
}
return b
}
func (j *jsonValue) Int(def int) int {
i, err := j.Json.Int()
if err == nil {
return i
}
str, ok := j.Interface().(string)
if !ok {
return def
}
i, err = strconv.Atoi(str)
if err != nil {
return def
}
return i
}
func (j *jsonValue) String(def string) string {
return j.Json.MustString(def)
}
func (j *jsonValue) Float64(def float64) float64 {
f, err := j.Json.Float64()
if err == nil {
return f
}
str, ok := j.Interface().(string)
if !ok {
return def
}
f, err = strconv.ParseFloat(str, 64)
if err != nil {
return def
}
return f
}
func (j *jsonValue) Duration(def time.Duration) time.Duration {
v, err := j.Json.String()
if err != nil {
return def
}
value, err := time.ParseDuration(v)
if err != nil {
return def
}
return value
}
func (j *jsonValue) StringSlice(def []string) []string {
v, err := j.Json.String()
if err == nil {
sl := strings.Split(v, ",")
if len(sl) > 1 {
return sl
}
}
return j.Json.MustStringArray(def)
}
func (j *jsonValue) StringMap(def map[string]string) map[string]string {
m, err := j.Json.Map()
if err != nil {
return def
}
res := map[string]string{}
for k, v := range m {
res[k] = fmt.Sprintf("%v", v)
}
return res
}
func (j *jsonValue) Scan(v interface{}) error {
b, err := j.Json.MarshalJSON()
if err != nil {
return err
}
return json.Unmarshal(b, v)
}
func (j *jsonValue) Bytes() []byte {
b, err := j.Json.Bytes()
if err != nil {
// try return marshalled
b, err = j.Json.MarshalJSON()
if err != nil {
return []byte{}
}
return b
}
return b
}

86
config/reader/json/values_test.go
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@ -1,86 +0,0 @@
package json
import (
"reflect"
"testing"
"github.com/unistack-org/micro/v3/config/reader"
"github.com/unistack-org/micro/v3/config/source"
)
func TestValues(t *testing.T) {
emptyStr := ""
testData := []struct {
csdata []byte
path []string
accepter interface{}
value interface{}
}{
{
[]byte(`{"foo": "bar", "baz": {"bar": "cat"}}`),
[]string{"foo"},
emptyStr,
"bar",
},
{
[]byte(`{"foo": "bar", "baz": {"bar": "cat"}}`),
[]string{"baz", "bar"},
emptyStr,
"cat",
},
}
for idx, test := range testData {
values, err := newValues(&source.ChangeSet{
Data: test.csdata,
}, reader.Options{})
if err != nil {
t.Fatal(err)
}
err = values.Get(test.path...).Scan(&test.accepter)
if err != nil {
t.Fatal(err)
}
if test.accepter != test.value {
t.Fatalf("No.%d Expected %v got %v for path %v", idx, test.value, test.accepter, test.path)
}
}
}
func TestStructArray(t *testing.T) {
type T struct {
Foo string
}
emptyTSlice := []T{}
testData := []struct {
csdata []byte
accepter []T
value []T
}{
{
[]byte(`[{"foo": "bar"}]`),
emptyTSlice,
[]T{{Foo: "bar"}},
},
}
for idx, test := range testData {
values, err := newValues(&source.ChangeSet{
Data: test.csdata,
}, reader.Options{})
if err != nil {
t.Fatal(err)
}
err = values.Get().Scan(&test.accepter)
if err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(test.accepter, test.value) {
t.Fatalf("No.%d Expected %v got %v", idx, test.value, test.accepter)
}
}
}

96
config/source/env/README.md vendored
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@ -1,96 +0,0 @@
# Env Source
The env source reads config from environment variables
## Format
We expect environment variables to be in the standard format of FOO=bar
Keys are converted to lowercase and split on underscore.
### Example
```
DATABASE_ADDRESS=127.0.0.1
DATABASE_PORT=3306
```
Becomes
```json
{
"database": {
"address": "127.0.0.1",
"port": 3306
}
}
```
## Prefixes
Environment variables can be namespaced so we only have access to a subset. Two options are available:
```
WithPrefix(p ...string)
WithStrippedPrefix(p ...string)
```
The former will preserve the prefix and make it a top level key in the config. The latter eliminates the prefix, reducing the nesting by one.
#### Example:
Given ENVs of:
```
APP_DATABASE_ADDRESS=127.0.0.1
APP_DATABASE_PORT=3306
VAULT_ADDR=vault:1337
```
and a source initialized as follows:
```
src := env.NewSource(
env.WithPrefix("VAULT"),
env.WithStrippedPrefix("APP"),
)
```
The resulting config will be:
```
{
"database": {
"address": "127.0.0.1",
"port": 3306
},
"vault": {
"addr": "vault:1337"
}
}
```
## New Source
Specify source with data
```go
src := env.NewSource(
// optionally specify prefix
env.WithPrefix("MICRO"),
)
```
## Load Source
Load the source into config
```go
// Create new config
conf := config.NewConfig()
// Load env source
conf.Load(src)
```

146
config/source/env/env.go vendored
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@ -1,146 +0,0 @@
package env
import (
"os"
"strconv"
"strings"
"time"
"github.com/imdario/mergo"
"github.com/unistack-org/micro/v3/config/source"
)
var (
DefaultPrefixes = []string{}
)
type env struct {
prefixes []string
strippedPrefixes []string
opts source.Options
}
func (e *env) Read() (*source.ChangeSet, error) {
var changes map[string]interface{}
for _, env := range os.Environ() {
if len(e.prefixes) > 0 || len(e.strippedPrefixes) > 0 {
notFound := true
if _, ok := matchPrefix(e.prefixes, env); ok {
notFound = false
}
if match, ok := matchPrefix(e.strippedPrefixes, env); ok {
env = strings.TrimPrefix(env, match)
notFound = false
}
if notFound {
continue
}
}
pair := strings.SplitN(env, "=", 2)
value := pair[1]
keys := strings.Split(strings.ToLower(pair[0]), "_")
reverse(keys)
tmp := make(map[string]interface{})
for i, k := range keys {
if i == 0 {
if intValue, err := strconv.Atoi(value); err == nil {
tmp[k] = intValue
} else if boolValue, err := strconv.ParseBool(value); err == nil {
tmp[k] = boolValue
} else {
tmp[k] = value
}
continue
}
tmp = map[string]interface{}{k: tmp}
}
if err := mergo.Map(&changes, tmp); err != nil {
return nil, err
}
}
b, err := e.opts.Encoder.Encode(changes)
if err != nil {
return nil, err
}
cs := &source.ChangeSet{
Format: e.opts.Encoder.String(),
Data: b,
Timestamp: time.Now(),
Source: e.String(),
}
cs.Checksum = cs.Sum()
return cs, nil
}
func matchPrefix(pre []string, s string) (string, bool) {
for _, p := range pre {
if strings.HasPrefix(s, p) {
return p, true
}
}
return "", false
}
func reverse(ss []string) {
for i := len(ss)/2 - 1; i >= 0; i-- {
opp := len(ss) - 1 - i
ss[i], ss[opp] = ss[opp], ss[i]
}
}
func (e *env) Watch() (source.Watcher, error) {
return newWatcher()
}
func (e *env) Write(cs *source.ChangeSet) error {
return nil
}
func (e *env) String() string {
return "env"
}
// NewSource returns a config source for parsing ENV variables.
// Underscores are delimiters for nesting, and all keys are lowercased.
//
// Example:
// "DATABASE_SERVER_HOST=localhost" will convert to
//
// {
// "database": {
// "server": {
// "host": "localhost"
// }
// }
// }
func NewSource(opts ...source.Option) source.Source {
options := source.NewOptions(opts...)
var sp []string
var pre []string
if p, ok := options.Context.Value(strippedPrefixKey{}).([]string); ok {
sp = p
}
if p, ok := options.Context.Value(prefixKey{}).([]string); ok {
pre = p
}
if len(sp) > 0 || len(pre) > 0 {
pre = append(pre, DefaultPrefixes...)
}
return &env{prefixes: pre, strippedPrefixes: sp, opts: options}
}

112
config/source/env/env_test.go vendored
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@ -1,112 +0,0 @@
package env
import (
"encoding/json"
"os"
"testing"
"time"
"github.com/unistack-org/micro/v3/config/source"
)
func TestEnv_Read(t *testing.T) {
expected := map[string]map[string]string{
"database": {
"host": "localhost",
"password": "password",
"datasource": "user:password@tcp(localhost:port)/db?charset=utf8mb4&parseTime=True&loc=Local",
},
}
os.Setenv("DATABASE_HOST", "localhost")
os.Setenv("DATABASE_PASSWORD", "password")
os.Setenv("DATABASE_DATASOURCE", "user:password@tcp(localhost:port)/db?charset=utf8mb4&parseTime=True&loc=Local")
source := NewSource()
c, err := source.Read()
if err != nil {
t.Error(err)
}
var actual map[string]interface{}
if err := json.Unmarshal(c.Data, &actual); err != nil {
t.Error(err)
}
actualDB := actual["database"].(map[string]interface{})
for k, v := range expected["database"] {
a := actualDB[k]
if a != v {
t.Errorf("expected %v got %v", v, a)
}
}
}
func TestEnvvar_Prefixes(t *testing.T) {
os.Setenv("APP_DATABASE_HOST", "localhost")
os.Setenv("APP_DATABASE_PASSWORD", "password")
os.Setenv("VAULT_ADDR", "vault:1337")
os.Setenv("MICRO_REGISTRY", "mdns")
var prefixtests = []struct {
prefixOpts []source.Option
expectedKeys []string
}{
{[]source.Option{WithPrefix("APP", "MICRO")}, []string{"app", "micro"}},
{[]source.Option{WithPrefix("MICRO"), WithStrippedPrefix("APP")}, []string{"database", "micro"}},
{[]source.Option{WithPrefix("MICRO"), WithStrippedPrefix("APP")}, []string{"database", "micro"}},
}
for _, pt := range prefixtests {
source := NewSource(pt.prefixOpts...)
c, err := source.Read()
if err != nil {
t.Error(err)
}
var actual map[string]interface{}
if err := json.Unmarshal(c.Data, &actual); err != nil {
t.Error(err)
}
// assert other prefixes ignored
if l := len(actual); l != len(pt.expectedKeys) {
t.Errorf("expected %v top keys, got %v", len(pt.expectedKeys), l)
}
for _, k := range pt.expectedKeys {
if !containsKey(actual, k) {
t.Errorf("expected key %v, not found", k)
}
}
}
}
func TestEnvvar_WatchNextNoOpsUntilStop(t *testing.T) {
src := NewSource(WithStrippedPrefix("GOMICRO_"))
w, err := src.Watch()
if err != nil {
t.Error(err)
}
go func() {
time.Sleep(50 * time.Millisecond)
w.Stop()
}()
if _, err := w.Next(); err != source.ErrWatcherStopped {
t.Errorf("expected watcher stopped error, got %v", err)
}
}
func containsKey(m map[string]interface{}, s string) bool {
for k := range m {
if k == s {
return true
}
}
return false
}

50
config/source/env/options.go vendored
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@ -1,50 +0,0 @@
package env
import (
"context"
"strings"
"github.com/unistack-org/micro/v3/config/source"
)
type strippedPrefixKey struct{}
type prefixKey struct{}
// WithStrippedPrefix sets the environment variable prefixes to scope to.
// These prefixes will be removed from the actual config entries.
func WithStrippedPrefix(p ...string) source.Option {
return func(o *source.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, strippedPrefixKey{}, appendUnderscore(p))
}
}
// WithPrefix sets the environment variable prefixes to scope to.
// These prefixes will not be removed. Each prefix will be considered a top level config entry.
func WithPrefix(p ...string) source.Option {
return func(o *source.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, prefixKey{}, appendUnderscore(p))
}
}
func appendUnderscore(prefixes []string) []string {
//nolint:prealloc
var result []string
for _, p := range prefixes {
if !strings.HasSuffix(p, "_") {
result = append(result, p+"_")
continue
}
result = append(result, p)
}
return result
}

24
config/source/env/watcher.go vendored
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@ -1,24 +0,0 @@
package env
import (
"github.com/unistack-org/micro/v3/config/source"
)
type watcher struct {
exit chan struct{}
}
func (w *watcher) Next() (*source.ChangeSet, error) {
<-w.exit
return nil, source.ErrWatcherStopped
}
func (w *watcher) Stop() error {
close(w.exit)
return nil
}
func newWatcher() (source.Watcher, error) {
return &watcher{exit: make(chan struct{})}, nil
}

51
config/source/etcd/README.md
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@ -1,51 +0,0 @@
# Etcd Source
The etcd source reads config from etcd key/values
This source supports etcd version 3 and beyond.
## Etcd Format
The etcd source expects keys under the default prefix `/micro/config` (prefix can be changed)
Values are expected to be JSON
```
// set database
etcdctl put /micro/config/database '{"address": "10.0.0.1", "port": 3306}'
// set cache
etcdctl put /micro/config/cache '{"address": "10.0.0.2", "port": 6379}'
```
Keys are split on `/` so access becomes
```
conf.Get("micro", "config", "database")
```
## New Source
Specify source with data
```go
etcdSource := etcd.NewSource(
// optionally specify etcd address; default to localhost:8500
etcd.WithAddress("10.0.0.10:8500"),
// optionally specify prefix; defaults to /micro/config
etcd.WithPrefix("/my/prefix"),
// optionally strip the provided prefix from the keys, defaults to false
etcd.StripPrefix(true),
)
```
## Load Source
Load the source into config
```go
// Create new config
conf := config.NewConfig()
// Load file source
conf.Load(etcdSource)
```

145
config/source/etcd/etcd.go
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@ -1,145 +0,0 @@
package etcd
import (
"context"
"fmt"
"net"
"time"
cetcd "github.com/coreos/etcd/clientv3"
"github.com/coreos/etcd/mvcc/mvccpb"
"github.com/unistack-org/micro/v3/config/source"
)
// Currently a single etcd reader
type etcd struct {
prefix string
stripPrefix string
opts source.Options
client *cetcd.Client
cerr error
}
var (
DefaultPrefix = "/micro/config/"
)
func (c *etcd) Read() (*source.ChangeSet, error) {
if c.cerr != nil {
return nil, c.cerr
}
rsp, err := c.client.Get(context.Background(), c.prefix, cetcd.WithPrefix())
if err != nil {
return nil, err
}
if rsp == nil || len(rsp.Kvs) == 0 {
return nil, fmt.Errorf("source not found: %s", c.prefix)
}
kvs := make([]*mvccpb.KeyValue, 0, len(rsp.Kvs))
for _, v := range rsp.Kvs {
kvs = append(kvs, (*mvccpb.KeyValue)(v))
}
data := makeMap(c.opts.Encoder, kvs, c.stripPrefix)
b, err := c.opts.Encoder.Encode(data)
if err != nil {
return nil, fmt.Errorf("error reading source: %v", err)
}
cs := &source.ChangeSet{
Timestamp: time.Now(),
Source: c.String(),
Data: b,
Format: c.opts.Encoder.String(),
}
cs.Checksum = cs.Sum()
return cs, nil
}
func (c *etcd) String() string {
return "etcd"
}
func (c *etcd) Watch() (source.Watcher, error) {
if c.cerr != nil {
return nil, c.cerr
}
cs, err := c.Read()
if err != nil {
return nil, err
}
return newWatcher(c.prefix, c.stripPrefix, c.client.Watcher, cs, c.opts)
}
func (c *etcd) Write(cs *source.ChangeSet) error {
return nil
}
func NewSource(opts ...source.Option) source.Source {
options := source.NewOptions(opts...)
var endpoints []string
// check if there are any addrs
addrs, ok := options.Context.Value(addressKey{}).([]string)
if ok {
for _, a := range addrs {
addr, port, err := net.SplitHostPort(a)
if ae, ok := err.(*net.AddrError); ok && ae.Err == "missing port in address" {
port = "2379"
addr = a
endpoints = append(endpoints, fmt.Sprintf("%s:%s", addr, port))
} else if err == nil {
endpoints = append(endpoints, fmt.Sprintf("%s:%s", addr, port))
}
}
}
if len(endpoints) == 0 {
endpoints = []string{"localhost:2379"}
}
// check dial timeout option
dialTimeout, ok := options.Context.Value(dialTimeoutKey{}).(time.Duration)
if !ok {
dialTimeout = 3 * time.Second // default dial timeout
}
config := cetcd.Config{
Endpoints: endpoints,
DialTimeout: dialTimeout,
}
u, ok := options.Context.Value(authKey{}).(*authCreds)
if ok {
config.Username = u.Username
config.Password = u.Password
}
// use default config
client, err := cetcd.New(config)
prefix := DefaultPrefix
sp := ""
f, ok := options.Context.Value(prefixKey{}).(string)
if ok {
prefix = f
}
if b, ok := options.Context.Value(stripPrefixKey{}).(bool); ok && b {
sp = prefix
}
return &etcd{
prefix: prefix,
stripPrefix: sp,
opts: options,
client: client,
cerr: err,
}
}

70
config/source/etcd/options.go
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@ -1,70 +0,0 @@
package etcd
import (
"context"
"time"
"github.com/unistack-org/micro/v3/config/source"
)
type addressKey struct{}
type prefixKey struct{}
type stripPrefixKey struct{}
type authKey struct{}
type dialTimeoutKey struct{}
type authCreds struct {
Username string
Password string
}
// WithAddress sets the etcd address
func WithAddress(a ...string) source.Option {
return func(o *source.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, addressKey{}, a)
}
}
// WithPrefix sets the key prefix to use
func WithPrefix(p string) source.Option {
return func(o *source.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, prefixKey{}, p)
}
}
// StripPrefix indicates whether to remove the prefix from config entries, or leave it in place.
func StripPrefix(strip bool) source.Option {
return func(o *source.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, stripPrefixKey{}, strip)
}
}
// Auth allows you to specify username/password
func Auth(username, password string) source.Option {
return func(o *source.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, authKey{}, &authCreds{Username: username, Password: password})
}
}
// WithDialTimeout set the time out for dialing to etcd
func WithDialTimeout(timeout time.Duration) source.Option {
return func(o *source.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, dialTimeoutKey{}, timeout)
}
}

89
config/source/etcd/util.go
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@ -1,89 +0,0 @@
package etcd
import (
"strings"
"github.com/coreos/etcd/clientv3"
"github.com/coreos/etcd/mvcc/mvccpb"
"github.com/unistack-org/micro/v3/config/encoder"
)
func makeEvMap(e encoder.Encoder, data map[string]interface{}, kv []*clientv3.Event, stripPrefix string) map[string]interface{} {
if data == nil {
data = make(map[string]interface{})
}
for _, v := range kv {
switch mvccpb.Event_EventType(v.Type) {
case mvccpb.DELETE:
data = update(e, data, (*mvccpb.KeyValue)(v.Kv), "delete", stripPrefix)
default:
data = update(e, data, (*mvccpb.KeyValue)(v.Kv), "insert", stripPrefix)
}
}
return data
}
func makeMap(e encoder.Encoder, kv []*mvccpb.KeyValue, stripPrefix string) map[string]interface{} {
data := make(map[string]interface{})
for _, v := range kv {
data = update(e, data, v, "put", stripPrefix)
}
return data
}
func update(e encoder.Encoder, data map[string]interface{}, v *mvccpb.KeyValue, action, stripPrefix string) map[string]interface{} {
// remove prefix if non empty, and ensure leading / is removed as well
vkey := strings.TrimPrefix(strings.TrimPrefix(string(v.Key), stripPrefix), "/")
// split on prefix
haveSplit := strings.Contains(vkey, "/")
keys := strings.Split(vkey, "/")
var vals interface{}
e.Decode(v.Value, &vals)
if !haveSplit && len(keys) == 1 {
switch action {
case "delete":
data = make(map[string]interface{})
default:
v, ok := vals.(map[string]interface{})
if ok {
data = v
}
}
return data
}
// set data for first iteration
kvals := data
// iterate the keys and make maps
for i, k := range keys {
kval, ok := kvals[k].(map[string]interface{})
if !ok {
// create next map
kval = make(map[string]interface{})
// set it
kvals[k] = kval
}
// last key: write vals
if l := len(keys) - 1; i == l {
switch action {
case "delete":
delete(kvals, k)
default:
kvals[k] = vals
}
break
}
// set kvals for next iterator
kvals = kval
}
return data
}

113
config/source/etcd/watcher.go
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@ -1,113 +0,0 @@
package etcd
import (
"context"
"errors"
"sync"
"time"
cetcd "github.com/coreos/etcd/clientv3"
"github.com/unistack-org/micro/v3/config/source"
)
type watcher struct {
opts source.Options
name string
stripPrefix string
sync.RWMutex
cs *source.ChangeSet
ch chan *source.ChangeSet
exit chan bool
}
func newWatcher(key, strip string, wc cetcd.Watcher, cs *source.ChangeSet, opts source.Options) (source.Watcher, error) {
w := &watcher{
opts: opts,
name: "etcd",
stripPrefix: strip,
cs: cs,
ch: make(chan *source.ChangeSet),
exit: make(chan bool),
}
ch := wc.Watch(context.Background(), key, cetcd.WithPrefix())
go w.run(wc, ch)
return w, nil
}
func (w *watcher) handle(evs []*cetcd.Event) {
w.RLock()
data := w.cs.Data
w.RUnlock()
var vals map[string]interface{}
// unpackage existing changeset
if err := w.opts.Encoder.Decode(data, &vals); err != nil {
return
}
// update base changeset
d := makeEvMap(w.opts.Encoder, vals, evs, w.stripPrefix)
// pack the changeset
b, err := w.opts.Encoder.Encode(d)
if err != nil {
return
}
// create new changeset
cs := &source.ChangeSet{
Timestamp: time.Now(),
Source: w.name,
Data: b,
Format: w.opts.Encoder.String(),
}
cs.Checksum = cs.Sum()
// set base change set
w.Lock()
w.cs = cs
w.Unlock()
// send update
w.ch <- cs
}
func (w *watcher) run(wc cetcd.Watcher, ch cetcd.WatchChan) {
for {
select {
case rsp, ok := <-ch:
if !ok {
return
}
w.handle(rsp.Events)
case <-w.exit:
wc.Close()
return
}
}
}
func (w *watcher) Next() (*source.ChangeSet, error) {
select {
case cs := <-w.ch:
return cs, nil
case <-w.exit:
return nil, errors.New("watcher stopped")
}
}
func (w *watcher) Stop() error {
select {
case <-w.exit:
return nil
default:
close(w.exit)
}
return nil
}

70
config/source/file/README.md
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@ -1,70 +0,0 @@
# File Source
The file source reads config from a file.
It uses the File extension to determine the Format e.g `config.yaml` has the yaml format.
It does not make use of encoders or interpet the file data. If a file extension is not present
the source Format will default to the Encoder in options.
## Example
A config file format in json
```json
{
"hosts": {
"database": {
"address": "10.0.0.1",
"port": 3306
},
"cache": {
"address": "10.0.0.2",
"port": 6379
}
}
}
```
## New Source
Specify file source with path to file. Path is optional and will default to `config.json`
```go
fileSource := file.NewSource(
file.WithPath("/tmp/config.json"),
)
```
## File Format
To load different file formats e.g yaml, toml, xml simply specify them with their extension
```
fileSource := file.NewSource(
file.WithPath("/tmp/config.yaml"),
)
```
If you want to specify a file without extension, ensure you set the encoder to the same format
```
e := toml.NewEncoder()
fileSource := file.NewSource(
file.WithPath("/tmp/config"),
source.WithEncoder(e),
)
```
## Load Source
Load the source into config
```go
// Create new config
conf := config.NewConfig()
// Load file source
conf.Load(fileSource)
```

70
config/source/file/file.go
View File

@ -1,70 +0,0 @@
// Package file is a file source. Expected format is json
package file
import (
"io/ioutil"
"os"
"github.com/unistack-org/micro/v3/config/source"
)
type file struct {
path string
data []byte
opts source.Options
}
var (
DefaultPath = "config.json"
)
func (f *file) Read() (*source.ChangeSet, error) {
fh, err := os.Open(f.path)
if err != nil {
return nil, err
}
defer fh.Close()
b, err := ioutil.ReadAll(fh)
if err != nil {
return nil, err
}
info, err := fh.Stat()
if err != nil {
return nil, err
}
cs := &source.ChangeSet{
Format: format(f.path, f.opts.Encoder),
Source: f.String(),
Timestamp: info.ModTime(),
Data: b,
}
cs.Checksum = cs.Sum()
return cs, nil
}
func (f *file) String() string {
return "file"
}
func (f *file) Watch() (source.Watcher, error) {
if _, err := os.Stat(f.path); err != nil {
return nil, err
}
return newWatcher(f)
}
func (f *file) Write(cs *source.ChangeSet) error {
return nil
}
func NewSource(opts ...source.Option) source.Source {
options := source.NewOptions(opts...)
path := DefaultPath
f, ok := options.Context.Value(filePathKey{}).(string)
if ok {
path = f
}
return &file{opts: options, path: path}
}

66
config/source/file/file_test.go
View File

@ -1,66 +0,0 @@
package file_test
import (
"fmt"
"os"
"path/filepath"
"testing"
"time"
"github.com/unistack-org/micro/v3/config"
"github.com/unistack-org/micro/v3/config/source/file"
)
func TestConfig(t *testing.T) {
data := []byte(`{"foo": "bar"}`)
path := filepath.Join(os.TempDir(), fmt.Sprintf("file.%d", time.Now().UnixNano()))
fh, err := os.Create(path)
if err != nil {
t.Error(err)
}
defer func() {
fh.Close()
os.Remove(path)
}()
_, err = fh.Write(data)
if err != nil {
t.Error(err)
}
conf, err := config.NewConfig()
if err != nil {
t.Fatal(err)
}
conf.Load(file.NewSource(file.WithPath(path)))
// simulate multiple close
go conf.Close()
go conf.Close()
}
func TestFile(t *testing.T) {
data := []byte(`{"foo": "bar"}`)
path := filepath.Join(os.TempDir(), fmt.Sprintf("file.%d", time.Now().UnixNano()))
fh, err := os.Create(path)
if err != nil {
t.Error(err)
}
defer func() {
fh.Close()
os.Remove(path)
}()
_, err = fh.Write(data)
if err != nil {
t.Error(err)
}
f := file.NewSource(file.WithPath(path))
c, err := f.Read()
if err != nil {
t.Error(err)
}
if string(c.Data) != string(data) {
t.Logf("%+v", c)
t.Error("data from file does not match")
}
}

15
config/source/file/format.go
View File

@ -1,15 +0,0 @@
package file
import (
"strings"
"github.com/unistack-org/micro/v3/config/encoder"
)
func format(p string, e encoder.Encoder) string {
parts := strings.Split(p, ".")
if len(parts) > 1 {
return parts[len(parts)-1]
}
return e.String()
}

31
config/source/file/format_test.go
View File

@ -1,31 +0,0 @@
package file
import (
"testing"
"github.com/unistack-org/micro/v3/config/source"
)
func TestFormat(t *testing.T) {
opts := source.NewOptions()
e := opts.Encoder
testCases := []struct {
p string
f string
}{
{"/foo/bar.json", "json"},
{"/foo/bar.yaml", "yaml"},
{"/foo/bar.xml", "xml"},
{"/foo/bar.conf.ini", "ini"},
{"conf", e.String()},
}
for _, d := range testCases {
f := format(d.p, e)
if f != d.f {
t.Fatalf("%s: expected %s got %s", d.p, d.f, f)
}
}
}

19
config/source/file/options.go
View File

@ -1,19 +0,0 @@
package file
import (
"context"
"github.com/unistack-org/micro/v3/config/source"
)
type filePathKey struct{}
// WithPath sets the path to file
func WithPath(p string) source.Option {
return func(o *source.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, filePathKey{}, p)
}
}

77
config/source/file/watcher.go
View File

@ -1,77 +0,0 @@
//+build !linux
package file
import (
"os"
"github.com/fsnotify/fsnotify"
"github.com/unistack-org/micro/v3/config/source"
)
type watcher struct {
f *file
fw *fsnotify.Watcher
exit chan bool
}
func newWatcher(f *file) (source.Watcher, error) {
fw, err := fsnotify.NewWatcher()
if err != nil {
return nil, err
}
fw.Add(f.path)
return &watcher{
f: f,
fw: fw,
exit: make(chan bool),
}, nil
}
func (w *watcher) Next() (*source.ChangeSet, error) {
// is it closed?
select {
case <-w.exit:
return nil, source.ErrWatcherStopped
default:
}
for {
// try get the event
select {
case event, _ := <-w.fw.Events:
if event.Op == fsnotify.Rename {
// check existence of file, and add watch again
_, err := os.Stat(event.Name)
if err == nil || os.IsExist(err) {
w.fw.Add(event.Name)
}
}
// ARCH: Darwin Kernel Version 18.7.0
// ioutil.WriteFile truncates it before writing, but the problem is that
// you will receive two events(fsnotify.Chmod and fsnotify.Write).
// We can solve this problem by ignoring fsnotify.Chmod event.
if event.Op&fsnotify.Write != fsnotify.Write {
continue
}
c, err := w.f.Read()
if err != nil {
return nil, err
}
return c, nil
case err := <-w.fw.Errors:
return nil, err
case <-w.exit:
return nil, source.ErrWatcherStopped
}
}
}
func (w *watcher) Stop() error {
return w.fw.Close()
}

80
config/source/file/watcher_linux.go
View File

@ -1,80 +0,0 @@
//+build linux
package file
import (
"os"
"reflect"
"github.com/fsnotify/fsnotify"
"github.com/unistack-org/micro/v3/config/source"
)
type watcher struct {
f *file
fw *fsnotify.Watcher
exit chan bool
}
func newWatcher(f *file) (source.Watcher, error) {
fw, err := fsnotify.NewWatcher()
if err != nil {
return nil, err
}
fw.Add(f.path)
return &watcher{
f: f,
fw: fw,
exit: make(chan bool),
}, nil
}
func (w *watcher) Next() (*source.ChangeSet, error) {
// is it closed?
select {
case <-w.exit:
return nil, source.ErrWatcherStopped
default:
}
for {
// try get the event
select {
case event, _ := <-w.fw.Events:
if event.Op == fsnotify.Rename {
// check existence of file, and add watch again
_, err := os.Stat(event.Name)
if err == nil || os.IsExist(err) {
w.fw.Add(event.Name)
}
}
c, err := w.f.Read()
if err != nil {
return nil, err
}
// ARCH: Linux centos-7.shared 3.10.0-693.5.2.el7.x86_64
// Sometimes, ioutil.WriteFile triggers multiple fsnotify.Write events, which may be a bug.
// Detect if the file has changed
if reflect.DeepEqual(c.Data, w.f.data) {
continue
}
w.f.data = c.Data
return c, nil
case err := <-w.fw.Errors:
return nil, err
case <-w.exit:
return nil, source.ErrWatcherStopped
}
}
}
func (w *watcher) Stop() error {
return w.fw.Close()
}

47
config/source/flag/README.md
View File

@ -1,47 +0,0 @@
# Flag Source
The flag source reads config from flags
## Format
We expect the use of the `flag` package. Upper case flags will be lower cased. Dashes will be used as delimiters.
### Example
```
dbAddress := flag.String("database_address", "127.0.0.1", "the db address")
dbPort := flag.Int("database_port", 3306, "the db port)
```
Becomes
```json
{
"database": {
"address": "127.0.0.1",
"port": 3306
}
}
```
## New Source
```go
flagSource := flag.NewSource(
// optionally enable reading of unset flags and their default
// values into config, defaults to false
IncludeUnset(true)
)
```
## Load Source
Load the source into config
```go
// Create new config
conf := config.NewConfig()
// Load flag source
conf.Load(flagSource)
```

101
config/source/flag/flag.go
View File

@ -1,101 +0,0 @@
package flag
import (
"errors"
"flag"
"strings"
"time"
"github.com/imdario/mergo"
"github.com/unistack-org/micro/v3/config/source"
)
type flagsrc struct {
opts source.Options
}
func (fs *flagsrc) Read() (*source.ChangeSet, error) {
if !flag.Parsed() {
return nil, errors.New("flags not parsed")
}
var changes map[string]interface{}
visitFn := func(f *flag.Flag) {
n := strings.ToLower(f.Name)
keys := strings.FieldsFunc(n, split)
reverse(keys)
tmp := make(map[string]interface{})
for i, k := range keys {
if i == 0 {
tmp[k] = f.Value
continue
}
tmp = map[string]interface{}{k: tmp}
}
mergo.Map(&changes, tmp) // need to sort error handling
}
unset, ok := fs.opts.Context.Value(includeUnsetKey{}).(bool)
if ok && unset {
flag.VisitAll(visitFn)
} else {
flag.Visit(visitFn)
}
b, err := fs.opts.Encoder.Encode(changes)
if err != nil {
return nil, err
}
cs := &source.ChangeSet{
Format: fs.opts.Encoder.String(),
Data: b,
Timestamp: time.Now(),
Source: fs.String(),
}
cs.Checksum = cs.Sum()
return cs, nil
}
func split(r rune) bool {
return r == '-' || r == '_'
}
func reverse(ss []string) {
for i := len(ss)/2 - 1; i >= 0; i-- {
opp := len(ss) - 1 - i
ss[i], ss[opp] = ss[opp], ss[i]
}
}
func (fs *flagsrc) Watch() (source.Watcher, error) {
return source.NewNoopWatcher()
}
func (fs *flagsrc) Write(cs *source.ChangeSet) error {
return nil
}
func (fs *flagsrc) String() string {
return "flag"
}
// NewSource returns a config source for integrating parsed flags.
// Hyphens are delimiters for nesting, and all keys are lowercased.
//
// Example:
// dbhost := flag.String("database-host", "localhost", "the db host name")
//
// {
// "database": {
// "host": "localhost"
// }
// }
func NewSource(opts ...source.Option) source.Source {
return &flagsrc{opts: source.NewOptions(opts...)}
}

68
config/source/flag/flag_test.go
View File

@ -1,68 +0,0 @@
package flag
import (
"encoding/json"
"flag"
"testing"
)
var (
dbuser = flag.String("database-user", "default", "db user")
dbhost = flag.String("database-host", "", "db host")
dbpw = flag.String("database-password", "", "db pw")
)
func initTestFlags() {
flag.Set("database-host", "localhost")
flag.Set("database-password", "some-password")
flag.Parse()
}
func TestFlagsrc_Read(t *testing.T) {
initTestFlags()
source := NewSource()
c, err := source.Read()
if err != nil {
t.Error(err)
}
var actual map[string]interface{}
if err := json.Unmarshal(c.Data, &actual); err != nil {
t.Error(err)
}
actualDB := actual["database"].(map[string]interface{})
if actualDB["host"] != *dbhost {
t.Errorf("expected %v got %v", *dbhost, actualDB["host"])
}
if actualDB["password"] != *dbpw {
t.Errorf("expected %v got %v", *dbpw, actualDB["password"])
}
// unset flags should not be loaded
if actualDB["user"] != nil {
t.Errorf("expected %v got %v", nil, actualDB["user"])
}
}
func TestFlagsrc_ReadAll(t *testing.T) {
initTestFlags()
source := NewSource(IncludeUnset(true))
c, err := source.Read()
if err != nil {
t.Error(err)
}
var actual map[string]interface{}
if err := json.Unmarshal(c.Data, &actual); err != nil {
t.Error(err)
}
actualDB := actual["database"].(map[string]interface{})
// unset flag defaults should be loaded
if actualDB["user"] != *dbuser {
t.Errorf("expected %v got %v", *dbuser, actualDB["user"])
}
}

20
config/source/flag/options.go
View File

@ -1,20 +0,0 @@
package flag
import (
"context"
"github.com/unistack-org/micro/v3/config/source"
)
type includeUnsetKey struct{}
// IncludeUnset toggles the loading of unset flags and their respective default values.
// Default behavior is to ignore any unset flags.
func IncludeUnset(b bool) source.Option {
return func(o *source.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, includeUnsetKey{}, true)
}
}

44
config/source/memory/README.md
View File

@ -1,44 +0,0 @@
# Memory Source
The memory source provides in-memory data as a source
## Memory Format
The expected data format is json
```json
data := []byte(`{
"hosts": {
"database": {
"address": "10.0.0.1",
"port": 3306
},
"cache": {
"address": "10.0.0.2",
"port": 6379
}
}
}`)
```
## New Source
Specify source with data
```go
memorySource := memory.NewSource(
memory.WithJSON(data),
)
```
## Load Source
Load the source into config
```go
// Create new config
conf := config.NewConfig()
// Load memory source
conf.Load(memorySource)
```

99
config/source/memory/memory.go
View File

@ -1,99 +0,0 @@
// Package memory is a memory source
package memory
import (
"sync"
"time"
"github.com/google/uuid"
"github.com/unistack-org/micro/v3/config/source"
)
type memory struct {
sync.RWMutex
ChangeSet *source.ChangeSet
Watchers map[string]*watcher
}
func (s *memory) Read() (*source.ChangeSet, error) {
s.RLock()
cs := &source.ChangeSet{
Format: s.ChangeSet.Format,
Timestamp: s.ChangeSet.Timestamp,
Data: s.ChangeSet.Data,
Checksum: s.ChangeSet.Checksum,
Source: s.ChangeSet.Source,
}
s.RUnlock()
return cs, nil
}
func (s *memory) Watch() (source.Watcher, error) {
w := &watcher{
Id: uuid.New().String(),
Updates: make(chan *source.ChangeSet, 100),
Source: s,
}
s.Lock()
s.Watchers[w.Id] = w
s.Unlock()
return w, nil
}
func (m *memory) Write(cs *source.ChangeSet) error {
m.Update(cs)
return nil
}
// Update allows manual updates of the config data.
func (s *memory) Update(c *source.ChangeSet) {
// don't process nil
if c == nil {
return
}
// hash the file
s.Lock()
// update changeset
s.ChangeSet = &source.ChangeSet{
Data: c.Data,
Format: c.Format,
Source: "memory",
Timestamp: time.Now(),
}
s.ChangeSet.Checksum = s.ChangeSet.Sum()
// update watchers
for _, w := range s.Watchers {
select {
case w.Updates <- s.ChangeSet:
default:
}
}
s.Unlock()
}
func (s *memory) String() string {
return "memory"
}
func NewSource(opts ...source.Option) source.Source {
var options source.Options
for _, o := range opts {
o(&options)
}
s := &memory{
Watchers: make(map[string]*watcher),
}
if options.Context != nil {
c, ok := options.Context.Value(changeSetKey{}).(*source.ChangeSet)
if ok {
s.Update(c)
}
}
return s
}

41
config/source/memory/options.go
View File

@ -1,41 +0,0 @@
package memory
import (
"context"
"github.com/unistack-org/micro/v3/config/source"
)
type changeSetKey struct{}
func withData(d []byte, f string) source.Option {
return func(o *source.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, changeSetKey{}, &source.ChangeSet{
Data: d,
Format: f,
})
}
}
// WithChangeSet allows a changeset to be set
func WithChangeSet(cs *source.ChangeSet) source.Option {
return func(o *source.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, changeSetKey{}, cs)
}
}
// WithJSON allows the source data to be set to json
func WithJSON(d []byte) source.Option {
return withData(d, "json")
}
// WithYAML allows the source data to be set to yaml
func WithYAML(d []byte) source.Option {
return withData(d, "yaml")
}

23
config/source/memory/watcher.go
View File

@ -1,23 +0,0 @@
package memory
import (
"github.com/unistack-org/micro/v3/config/source"
)
type watcher struct {
Id string
Updates chan *source.ChangeSet
Source *memory
}
func (w *watcher) Next() (*source.ChangeSet, error) {
cs := <-w.Updates
return cs, nil
}
func (w *watcher) Stop() error {
w.Source.Lock()
delete(w.Source.Watchers, w.Id)
w.Source.Unlock()
return nil
}

2
debug/log/kubernetes/kubernetes_test.go
View File

@ -13,7 +13,7 @@ import (
)
func TestKubernetes(t *testing.T) {
if len(os.Getenv("IN_TRAVIS_CI")) > 0 {
if len(os.Getenv("INTEGRATION_TESTS")) > 0 {
t.Skip()
}

181
events/memory/memory.go
View File

@ -1,181 +0,0 @@
package memory
import (
"encoding/json"
"fmt"
"sync"
"time"
"github.com/google/uuid"
"github.com/pkg/errors"
"github.com/unistack-org/micro/v3/events"
"github.com/unistack-org/micro/v3/logger"
"github.com/unistack-org/micro/v3/store"
"github.com/unistack-org/micro/v3/store/memory"
)
// NewStream returns an initialized memory stream
func NewStream(opts ...Option) (events.Stream, error) {
// parse the options
var options Options
for _, o := range opts {
o(&options)
}
if options.Store == nil {
options.Store = memory.NewStore()
}
return &mem{store: options.Store}, nil
}
type subscriber struct {
Queue string
Topic string
Channel chan events.Event
}
type mem struct {
store store.Store
subs []*subscriber
sync.RWMutex
}
func (m *mem) Publish(topic string, msg interface{}, opts ...events.PublishOption) error {
// validate the topic
if len(topic) == 0 {
return events.ErrMissingTopic
}
// parse the options
options := events.PublishOptions{
Timestamp: time.Now(),
}
for _, o := range opts {
o(&options)
}
// encode the message if it's not already encoded
var payload []byte
if p, ok := msg.([]byte); ok {
payload = p
} else {
p, err := json.Marshal(msg)
if err != nil {
return events.ErrEncodingMessage
}
payload = p
}
// construct the event
event := &events.Event{
ID: uuid.New().String(),
Topic: topic,
Timestamp: options.Timestamp,
Metadata: options.Metadata,
Payload: payload,
}
// serialize the event to bytes
bytes, err := json.Marshal(event)
if err != nil {
return errors.Wrap(err, "Error encoding event")
}
// write to the store
key := fmt.Sprintf("%v/%v", event.Topic, event.ID)
if err := m.store.Write(&store.Record{Key: key, Value: bytes}); err != nil {
return errors.Wrap(err, "Error writing event to store")
}
// send to the subscribers async
go m.handleEvent(event)
return nil
}
func (m *mem) Subscribe(topic string, opts ...events.SubscribeOption) (<-chan events.Event, error) {
// validate the topic
if len(topic) == 0 {
return nil, events.ErrMissingTopic
}
// parse the options
options := events.SubscribeOptions{
Queue: uuid.New().String(),
}
for _, o := range opts {
o(&options)
}
// setup the subscriber
sub := &subscriber{
Channel: make(chan events.Event),
Topic: topic,
Queue: options.Queue,
}
// register the subscriber
m.Lock()
m.subs = append(m.subs, sub)
m.Unlock()
// lookup previous events if the start time option was passed
if options.StartAtTime.Unix() > 0 {
go m.lookupPreviousEvents(sub, options.StartAtTime)
}
// return the channel
return sub.Channel, nil
}
// lookupPreviousEvents finds events for a subscriber which occured before a given time and sends
// them into the subscribers channel
func (m *mem) lookupPreviousEvents(sub *subscriber, startTime time.Time) {
// lookup all events which match the topic (a blank topic will return all results)
recs, err := m.store.Read(sub.Topic+"/", store.ReadPrefix())
if err != nil && logger.V(logger.ErrorLevel, logger.DefaultLogger) {
logger.Errorf("Error looking up previous events: %v", err)
return
} else if err != nil {
return
}
// loop through the records and send it to the channel if it matches
for _, r := range recs {
var ev events.Event
if err := json.Unmarshal(r.Value, &ev); err != nil {
continue
}
if ev.Timestamp.Unix() < startTime.Unix() {
continue
}
sub.Channel <- ev
}
}
// handleEvents sends the event to any registered subscribers.
func (m *mem) handleEvent(ev *events.Event) {
m.RLock()
subs := m.subs
m.RUnlock()
// filteredSubs is a KV map of the queue name and subscribers. This is used to prevent a message
// being sent to two subscribers with the same queue.
filteredSubs := map[string]*subscriber{}
// filter down to subscribers who are interested in this topic
for _, sub := range subs {
if len(sub.Topic) == 0 || sub.Topic == ev.Topic {
filteredSubs[sub.Queue] = sub
}
}
// send the message to each channel async (since one channel might be blocked)
for _, sub := range subs {
go func(s *subscriber) {
s.Channel <- *ev
}(sub)
}
}

135
events/memory/memory_test.go
View File

@ -1,135 +0,0 @@
package memory
import (
"sync"
"testing"
"time"
"github.com/google/uuid"
"github.com/stretchr/testify/assert"
"github.com/unistack-org/micro/v3/events"
)
type testPayload struct {
Message string
}
func TestStream(t *testing.T) {
stream, err := NewStream()
assert.Nilf(t, err, "NewStream should not return an error")
assert.NotNilf(t, stream, "NewStream should return a stream object")
// TestMissingTopic will test the topic validation on publish
t.Run("TestMissingTopic", func(t *testing.T) {
err := stream.Publish("", nil)
assert.Equalf(t, err, events.ErrMissingTopic, "Publishing to a blank topic should return an error")
})
// TestSubscribeTopic will publish a message to the test topic. The subscriber will subscribe to the
// same test topic.
t.Run("TestSubscribeTopic", func(t *testing.T) {
payload := &testPayload{Message: "HelloWorld"}
metadata := map[string]string{"foo": "bar"}
// create the subscriber
evChan, err := stream.Subscribe("test")
assert.Nilf(t, err, "Subscribe should not return an error")
// setup the subscriber async
var wg sync.WaitGroup
go func() {
timeout := time.NewTimer(time.Millisecond * 250)
select {
case event, _ := <-evChan:
assert.NotNilf(t, event, "The message was nil")
assert.Equal(t, event.Metadata, metadata, "Metadata didn't match")
var result testPayload
err = event.Unmarshal(&result)
assert.Nil(t, err, "Error decoding result")
assert.Equal(t, result, *payload, "Payload didn't match")
wg.Done()
case <-timeout.C:
t.Fatalf("Event was not recieved")
}
}()
err = stream.Publish("test", payload, events.WithMetadata(metadata))
assert.Nil(t, err, "Publishing a valid message should not return an error")
wg.Add(1)
// wait for the subscriber to recieve the message or timeout
wg.Wait()
})
// TestSubscribeQueue will publish a message to a random topic. Two subscribers will then consume
// the message from the firehose topic with different queues. The second subscriber will be registered
// after the message is published to test durability.
t.Run("TestSubscribeQueue", func(t *testing.T) {
topic := uuid.New().String()
payload := &testPayload{Message: "HelloWorld"}
metadata := map[string]string{"foo": "bar"}
// create the first subscriber
evChan1, err := stream.Subscribe(topic)
assert.Nilf(t, err, "Subscribe should not return an error")
// setup the subscriber async
var wg sync.WaitGroup
go func() {
timeout := time.NewTimer(time.Millisecond * 250)
select {
case event, _ := <-evChan1:
assert.NotNilf(t, event, "The message was nil")
assert.Equal(t, event.Metadata, metadata, "Metadata didn't match")
var result testPayload
err = event.Unmarshal(&result)
assert.Nil(t, err, "Error decoding result")
assert.Equal(t, result, *payload, "Payload didn't match")
wg.Done()
case <-timeout.C:
t.Fatalf("Event was not recieved")
}
}()
err = stream.Publish(topic, payload, events.WithMetadata(metadata))
assert.Nil(t, err, "Publishing a valid message should not return an error")
wg.Add(2)
// create the second subscriber
evChan2, err := stream.Subscribe(topic,
events.WithQueue("second_queue"),
events.WithStartAtTime(time.Now().Add(time.Minute*-1)),
)
assert.Nilf(t, err, "Subscribe should not return an error")
go func() {
timeout := time.NewTimer(time.Millisecond * 250)
select {
case event, _ := <-evChan2:
assert.NotNilf(t, event, "The message was nil")
assert.Equal(t, event.Metadata, metadata, "Metadata didn't match")
var result testPayload
err = event.Unmarshal(&result)
assert.Nil(t, err, "Error decoding result")
assert.Equal(t, result, *payload, "Payload didn't match")
wg.Done()
case <-timeout.C:
t.Fatalf("Event was not recieved")
}
}()
// wait for the subscriber to recieve the message or timeout
wg.Wait()
})
}

18
events/memory/options.go
View File

@ -1,18 +0,0 @@
package memory
import "github.com/unistack-org/micro/v3/store"
// Options which are used to configure the in-memory stream
type Options struct {
Store store.Store
}
// Option is a function which configures options
type Option func(o *Options)
// Store sets the store to use
func Store(s store.Store) Option {
return func(o *Options) {
o.Store = s
}
}

162
events/nats/nats.go
View File

@ -1,162 +0,0 @@
package nats
import (
"encoding/json"
"fmt"
"time"
"github.com/google/uuid"
"github.com/nats-io/nats.go"
stan "github.com/nats-io/stan.go"
"github.com/pkg/errors"
"github.com/unistack-org/micro/v3/events"
"github.com/unistack-org/micro/v3/logger"
)
const (
defaultClusterID = "micro"
)
// NewStream returns an initialized nats stream or an error if the connection to the nats
// server could not be established
func NewStream(opts ...Option) (events.Stream, error) {
// parse the options
options := Options{
ClientID: uuid.New().String(),
ClusterID: defaultClusterID,
}
for _, o := range opts {
o(&options)
}
// connect to nats
nopts := nats.GetDefaultOptions()
if options.TLSConfig != nil {
nopts.Secure = true
nopts.TLSConfig = options.TLSConfig
}
if len(options.Address) > 0 {
nopts.Servers = []string{options.Address}
}
conn, err := nopts.Connect()
if err != nil {
return nil, fmt.Errorf("Error connecting to nats at %v with tls enabled (%v): %v", options.Address, nopts.TLSConfig != nil, err)
}
// connect to the cluster
clusterConn, err := stan.Connect(options.ClusterID, options.ClientID, stan.NatsConn(conn))
if err != nil {
return nil, fmt.Errorf("Error connecting to nats cluster %v: %v", options.ClusterID, err)
}
return &stream{clusterConn}, nil
}
type stream struct {
conn stan.Conn
}
// Publish a message to a topic
func (s *stream) Publish(topic string, msg interface{}, opts ...events.PublishOption) error {
// validate the topic
if len(topic) == 0 {
return events.ErrMissingTopic
}
// parse the options
options := events.PublishOptions{
Timestamp: time.Now(),
}
for _, o := range opts {
o(&options)
}
// encode the message if it's not already encoded
var payload []byte
if p, ok := msg.([]byte); ok {
payload = p
} else {
p, err := json.Marshal(msg)
if err != nil {
return events.ErrEncodingMessage
}
payload = p
}
// construct the event
event := &events.Event{
ID: uuid.New().String(),
Topic: topic,
Timestamp: options.Timestamp,
Metadata: options.Metadata,
Payload: payload,
}
// serialize the event to bytes
bytes, err := json.Marshal(event)
if err != nil {
return errors.Wrap(err, "Error encoding event")
}
// publish the event to the topic's channel
if _, err := s.conn.PublishAsync(event.Topic, bytes, nil); err != nil {
return errors.Wrap(err, "Error publishing message to topic")
}
return nil
}
// Subscribe to a topic
func (s *stream) Subscribe(topic string, opts ...events.SubscribeOption) (<-chan events.Event, error) {
// validate the topic
if len(topic) == 0 {
return nil, events.ErrMissingTopic
}
// parse the options
options := events.SubscribeOptions{
Queue: uuid.New().String(),
}
for _, o := range opts {
o(&options)
}
// setup the subscriber
c := make(chan events.Event)
handleMsg := func(m *stan.Msg) {
// decode the message
var evt events.Event
if err := json.Unmarshal(m.Data, &evt); err != nil {
if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
logger.Errorf("Error decoding message: %v", err)
}
// not ackknowledging the message is the way to indicate an error occured
return
}
// push onto the channel and wait for the consumer to take the event off before we acknowledge it.
c <- evt
if err := m.Ack(); err != nil && logger.V(logger.ErrorLevel, logger.DefaultLogger) {
logger.Errorf("Error acknowledging message: %v", err)
}
}
// setup the options
subOpts := []stan.SubscriptionOption{
stan.DurableName(topic),
stan.SetManualAckMode(),
}
if options.StartAtTime.Unix() > 0 {
stan.StartAtTime(options.StartAtTime)
}
// connect the subscriber
_, err := s.conn.QueueSubscribe(topic, options.Queue, handleMsg, subOpts...)
if err != nil {
return nil, errors.Wrap(err, "Error subscribing to topic")
}
return c, nil
}

151
events/nats/nats_test.go
View File

@ -1,151 +0,0 @@
package nats
import (
"net"
"os/exec"
"sync"
"testing"
"time"
"github.com/google/uuid"
"github.com/stretchr/testify/assert"
"github.com/unistack-org/micro/v3/events"
)
type testPayload struct {
Message string
}
func TestStream(t *testing.T) {
t.Skip()
_, err := exec.LookPath("nats-streaming-server")
if err != nil {
t.Skipf("Skipping nats test, nats-streaming-server binary is not detected")
}
conn, err := net.DialTimeout("tcp", ":4222", time.Millisecond*100)
if err != nil {
t.Skipf("Skipping nats test, could not connect to cluster on port 4222: %v", err)
}
if err := conn.Close(); err != nil {
t.Fatalf("Error closing test tcp connection to nats cluster")
}
stream, err := NewStream(ClusterID("test-cluster"))
assert.Nilf(t, err, "NewStream should not return an error")
assert.NotNilf(t, stream, "NewStream should return a stream object")
// TestMissingTopic will test the topic validation on publish
t.Run("TestMissingTopic", func(t *testing.T) {
err := stream.Publish("", nil)
assert.Equalf(t, err, events.ErrMissingTopic, "Publishing to a blank topic should return an error")
})
// TestSubscribeTopic will publish a message to the test topic. The subscriber will subscribe to the
// same test topic.
t.Run("TestSubscribeTopic", func(t *testing.T) {
payload := &testPayload{Message: "HelloWorld"}
metadata := map[string]string{"foo": "bar"}
// create the subscriber
evChan, err := stream.Subscribe("test")
assert.Nilf(t, err, "Subscribe should not return an error")
// setup the subscriber async
var wg sync.WaitGroup
go func() {
timeout := time.NewTimer(time.Millisecond * 250)
select {
case event, _ := <-evChan:
assert.NotNilf(t, event, "The message was nil")
assert.Equal(t, event.Metadata, metadata, "Metadata didn't match")
var result testPayload
err = event.Unmarshal(&result)
assert.Nil(t, err, "Error decoding result")
assert.Equal(t, result, *payload, "Payload didn't match")
wg.Done()
case <-timeout.C:
t.Fatalf("Event was not recieved")
}
}()
err = stream.Publish("test", payload, events.WithMetadata(metadata))
assert.Nil(t, err, "Publishing a valid message should not return an error")
wg.Add(1)
// wait for the subscriber to recieve the message or timeout
wg.Wait()
})
// TestSubscribeQueue will publish a message to a random topic. Two subscribers will then consume
// the message from the firehose topic with different queues. The second subscriber will be registered
// after the message is published to test durability.
t.Run("TestSubscribeQueue", func(t *testing.T) {
topic := uuid.New().String()
payload := &testPayload{Message: "HelloWorld"}
metadata := map[string]string{"foo": "bar"}
// create the first subscriber
evChan1, err := stream.Subscribe(topic)
assert.Nilf(t, err, "Subscribe should not return an error")
// setup the subscriber async
var wg sync.WaitGroup
go func() {
timeout := time.NewTimer(time.Millisecond * 250)
select {
case event, _ := <-evChan1:
assert.NotNilf(t, event, "The message was nil")
assert.Equal(t, event.Metadata, metadata, "Metadata didn't match")
var result testPayload
err = event.Unmarshal(&result)
assert.Nil(t, err, "Error decoding result")
assert.Equal(t, result, *payload, "Payload didn't match")
wg.Done()
case <-timeout.C:
t.Fatalf("Event was not recieved")
}
}()
err = stream.Publish(topic, payload, events.WithMetadata(metadata))
assert.Nil(t, err, "Publishing a valid message should not return an error")
wg.Add(2)
// create the second subscriber
evChan2, err := stream.Subscribe(topic,
events.WithQueue("second_queue"),
events.WithStartAtTime(time.Now().Add(time.Minute*-1)),
)
assert.Nilf(t, err, "Subscribe should not return an error")
go func() {
timeout := time.NewTimer(time.Millisecond * 250)
select {
case event, _ := <-evChan2:
assert.NotNilf(t, event, "The message was nil")
assert.Equal(t, event.Metadata, metadata, "Metadata didn't match")
var result testPayload
err = event.Unmarshal(&result)
assert.Nil(t, err, "Error decoding result")
assert.Equal(t, result, *payload, "Payload didn't match")
wg.Done()
case <-timeout.C:
t.Fatalf("Event was not recieved")
}
}()
// wait for the subscriber to recieve the message or timeout
wg.Wait()
})
}

42
events/nats/options.go
View File

@ -1,42 +0,0 @@
package nats
import "crypto/tls"
// Options which are used to configure the nats stream
type Options struct {
ClusterID string
ClientID string
Address string
TLSConfig *tls.Config
}
// Option is a function which configures options
type Option func(o *Options)
// ClusterID sets the cluster id for the nats connection
func ClusterID(id string) Option {
return func(o *Options) {
o.ClusterID = id
}
}
// ClientID sets the client id for the nats connection
func ClientID(id string) Option {
return func(o *Options) {
o.ClientID = id
}
}
// Address of the nats cluster
func Address(addr string) Option {
return func(o *Options) {
o.Address = addr
}
}
// TLSConfig to use when connecting to the cluster
func TLSConfig(t *tls.Config) Option {
return func(o *Options) {
o.TLSConfig = t
}
}

40
go.mod
View File

@ -4,20 +4,12 @@ go 1.15
require (
github.com/BurntSushi/toml v0.3.1
github.com/bitly/go-simplejson v0.5.0
github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869 // indirect
github.com/bradfitz/gomemcache v0.0.0-20190913173617-a41fca850d0b
github.com/caddyserver/certmagic v0.10.6
github.com/coreos/bbolt v0.0.0-00010101000000-000000000000 // indirect
github.com/coreos/etcd v3.3.18+incompatible
github.com/coreos/go-semver v0.3.0 // indirect
github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f // indirect
github.com/davecgh/go-spew v1.1.1
github.com/dgrijalva/jwt-go v3.2.0+incompatible
github.com/ef-ds/deque v1.0.4-0.20190904040645-54cb57c252a1
github.com/evanphx/json-patch/v5 v5.0.0
github.com/fsnotify/fsnotify v1.4.9
github.com/fsouza/go-dockerclient v1.6.0
github.com/fsnotify/fsnotify v1.4.9 // indirect
github.com/ghodss/yaml v1.0.0
github.com/go-acme/lego/v3 v3.4.0
github.com/gobwas/httphead v0.0.0-20180130184737-2c6c146eadee
@ -26,45 +18,21 @@ require (
github.com/golang/protobuf v1.4.2
github.com/google/uuid v1.1.1
github.com/gorilla/handlers v1.4.2
github.com/gorilla/websocket v1.4.2 // indirect
github.com/grpc-ecosystem/go-grpc-middleware v1.2.1 // indirect
github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0 // indirect
github.com/hashicorp/hcl v1.0.0
github.com/hpcloud/tail v1.0.0
github.com/imdario/mergo v0.3.9
github.com/jonboulle/clockwork v0.2.0 // indirect
github.com/kr/pretty v0.2.0
github.com/lib/pq v1.7.0
github.com/lucas-clemente/quic-go v0.18.0
github.com/kr/pretty v0.2.0 // indirect
github.com/miekg/dns v1.1.27
github.com/mitchellh/hashstructure v1.0.0
github.com/nats-io/nats-streaming-server v0.18.0 // indirect
github.com/nats-io/nats.go v1.10.0
github.com/nats-io/stan.go v0.7.0
github.com/oxtoacart/bpool v0.0.0-20190530202638-03653db5a59c
github.com/patrickmn/go-cache v2.1.0+incompatible
github.com/pkg/errors v0.9.1
github.com/pkg/errors v0.9.1 // indirect
github.com/prometheus/client_golang v1.7.0
github.com/soheilhy/cmux v0.1.4 // indirect
github.com/stretchr/testify v1.5.1
github.com/teris-io/shortid v0.0.0-20171029131806-771a37caa5cf
github.com/tmc/grpc-websocket-proxy v0.0.0-20200427203606-3cfed13b9966 // indirect
github.com/xanzy/go-gitlab v0.35.1
github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2 // indirect
go.etcd.io/bbolt v1.3.5
go.uber.org/zap v1.13.0
golang.org/x/crypto v0.0.0-20200709230013-948cd5f35899
golang.org/x/net v0.0.0-20200707034311-ab3426394381
google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013
google.golang.org/grpc v1.29.1
google.golang.org/protobuf v1.25.0
gopkg.in/square/go-jose.v2 v2.4.1 // indirect
sigs.k8s.io/yaml v1.2.0 // indirect
)
replace (
github.com/coreos/bbolt => go.etcd.io/bbolt v1.3.3
github.com/coreos/etcd => github.com/ozonru/etcd v3.3.20-grpc1.27-origmodule+incompatible
github.com/imdario/mergo => github.com/imdario/mergo v0.3.8
google.golang.org/grpc => google.golang.org/grpc v1.27.0
gopkg.in/yaml.v2 v2.3.0 // indirect
)

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