Further consolidate the libraries
This commit is contained in:
Asim Aslam
commit
8a3538eb77
30
README.md
Normal file
30
README.md
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@ -0,0 +1,30 @@
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# GRPC Server
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The grpc server is a [micro.Server](https://godoc.org/github.com/micro/go-micro/server#Server) compatible server.
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## Overview
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The server makes use of the [google.golang.org/grpc](google.golang.org/grpc) framework for the underlying server
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but continues to use micro handler signatures and protoc-gen-micro generated code.
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## Usage
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Specify the server to your micro service
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```go
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import (
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"github.com/micro/go-micro"
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"github.com/micro/go-plugins/server/grpc"
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)
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func main() {
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service := micro.NewService(
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// This needs to be first as it replaces the underlying server
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// which causes any configuration set before it
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// to be discarded
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micro.Server(grpc.NewServer()),
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micro.Name("greeter"),
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)
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}
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```
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**NOTE**: Setting the gRPC server and/or client causes the underlying the server/client to be replaced which causes any previous configuration set on that server/client to be discarded. It is therefore recommended to set gRPC server/client before any other configuration
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14
buffer.go
Normal file
14
buffer.go
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@ -0,0 +1,14 @@
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package grpc
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import (
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"bytes"
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)
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type buffer struct {
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*bytes.Buffer
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}
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func (b *buffer) Close() error {
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b.Buffer.Reset()
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return nil
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}
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82
codec.go
Normal file
82
codec.go
Normal file
@ -0,0 +1,82 @@
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package grpc
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import (
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"encoding/json"
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"fmt"
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"github.com/golang/protobuf/proto"
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"github.com/micro/go-micro/codec"
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"github.com/micro/go-micro/codec/jsonrpc"
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"github.com/micro/go-micro/codec/protorpc"
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"google.golang.org/grpc/encoding"
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)
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type jsonCodec struct{}
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type bytesCodec struct{}
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type protoCodec struct{}
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var (
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defaultGRPCCodecs = map[string]encoding.Codec{
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"application/json": jsonCodec{},
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"application/proto": protoCodec{},
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"application/protobuf": protoCodec{},
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"application/octet-stream": protoCodec{},
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"application/grpc": protoCodec{},
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"application/grpc+json": jsonCodec{},
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"application/grpc+proto": protoCodec{},
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"application/grpc+bytes": bytesCodec{},
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}
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defaultRPCCodecs = map[string]codec.NewCodec{
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"application/json": jsonrpc.NewCodec,
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"application/json-rpc": jsonrpc.NewCodec,
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"application/protobuf": protorpc.NewCodec,
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"application/proto-rpc": protorpc.NewCodec,
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"application/octet-stream": protorpc.NewCodec,
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}
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)
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func (protoCodec) Marshal(v interface{}) ([]byte, error) {
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return proto.Marshal(v.(proto.Message))
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}
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func (protoCodec) Unmarshal(data []byte, v interface{}) error {
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return proto.Unmarshal(data, v.(proto.Message))
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}
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func (protoCodec) Name() string {
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return "proto"
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}
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func (jsonCodec) Marshal(v interface{}) ([]byte, error) {
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return json.Marshal(v)
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}
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func (jsonCodec) Unmarshal(data []byte, v interface{}) error {
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return json.Unmarshal(data, v)
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}
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func (jsonCodec) Name() string {
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return "json"
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}
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func (bytesCodec) Marshal(v interface{}) ([]byte, error) {
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b, ok := v.(*[]byte)
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if !ok {
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return nil, fmt.Errorf("failed to marshal: %v is not type of *[]byte", v)
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}
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return *b, nil
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}
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func (bytesCodec) Unmarshal(data []byte, v interface{}) error {
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b, ok := v.(*[]byte)
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if !ok {
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return fmt.Errorf("failed to unmarshal: %v is not type of *[]byte", v)
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}
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*b = data
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return nil
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}
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func (bytesCodec) Name() string {
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return "bytes"
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}
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15
debug.go
Normal file
15
debug.go
Normal file
@ -0,0 +1,15 @@
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package grpc
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import (
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"github.com/micro/go-micro/server"
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"github.com/micro/go-micro/server/debug"
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)
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// We use this to wrap any debug handlers so we preserve the signature Debug.{Method}
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type Debug struct {
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debug.DebugHandler
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}
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func registerDebugHandler(s server.Server) {
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s.Handle(s.NewHandler(&Debug{s.Options().DebugHandler}, server.InternalHandler(true)))
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}
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42
error.go
Normal file
42
error.go
Normal file
@ -0,0 +1,42 @@
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package grpc
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import (
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"net/http"
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"github.com/micro/go-micro/errors"
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"google.golang.org/grpc/codes"
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)
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func microError(err *errors.Error) codes.Code {
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switch err {
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case nil:
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return codes.OK
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}
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switch err.Code {
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case http.StatusOK:
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return codes.OK
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case http.StatusBadRequest:
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return codes.InvalidArgument
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case http.StatusRequestTimeout:
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return codes.DeadlineExceeded
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case http.StatusNotFound:
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return codes.NotFound
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case http.StatusConflict:
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return codes.AlreadyExists
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case http.StatusForbidden:
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return codes.PermissionDenied
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case http.StatusUnauthorized:
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return codes.Unauthenticated
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case http.StatusPreconditionFailed:
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return codes.FailedPrecondition
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case http.StatusNotImplemented:
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return codes.Unimplemented
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case http.StatusInternalServerError:
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return codes.Internal
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case http.StatusServiceUnavailable:
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return codes.Unavailable
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}
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return codes.Unknown
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}
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120
extractor.go
Normal file
120
extractor.go
Normal file
@ -0,0 +1,120 @@
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package grpc
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import (
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"fmt"
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"reflect"
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"strings"
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"github.com/micro/go-micro/registry"
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)
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func extractValue(v reflect.Type, d int) *registry.Value {
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if d == 3 {
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return nil
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}
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if v == nil {
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return nil
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}
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if v.Kind() == reflect.Ptr {
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v = v.Elem()
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}
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arg := ®istry.Value{
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Name: v.Name(),
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Type: v.Name(),
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}
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switch v.Kind() {
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case reflect.Struct:
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for i := 0; i < v.NumField(); i++ {
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f := v.Field(i)
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val := extractValue(f.Type, d+1)
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if val == nil {
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continue
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}
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// if we can find a json tag use it
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if tags := f.Tag.Get("json"); len(tags) > 0 {
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parts := strings.Split(tags, ",")
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if parts[0] == "-" || parts[0] == "omitempty" {
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continue
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}
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val.Name = parts[0]
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}
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// if there's no name default it
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if len(val.Name) == 0 {
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val.Name = v.Field(i).Name
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}
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arg.Values = append(arg.Values, val)
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}
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case reflect.Slice:
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p := v.Elem()
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if p.Kind() == reflect.Ptr {
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p = p.Elem()
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}
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arg.Type = "[]" + p.Name()
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val := extractValue(v.Elem(), d+1)
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if val != nil {
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arg.Values = append(arg.Values, val)
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}
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}
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return arg
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}
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func extractEndpoint(method reflect.Method) *registry.Endpoint {
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if method.PkgPath != "" {
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return nil
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}
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var rspType, reqType reflect.Type
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var stream bool
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mt := method.Type
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switch mt.NumIn() {
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case 3:
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reqType = mt.In(1)
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rspType = mt.In(2)
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case 4:
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reqType = mt.In(2)
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rspType = mt.In(3)
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default:
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return nil
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}
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// are we dealing with a stream?
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switch rspType.Kind() {
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case reflect.Func, reflect.Interface:
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stream = true
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}
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request := extractValue(reqType, 0)
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response := extractValue(rspType, 0)
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return ®istry.Endpoint{
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Name: method.Name,
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Request: request,
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Response: response,
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Metadata: map[string]string{
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"stream": fmt.Sprintf("%v", stream),
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},
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}
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}
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func extractSubValue(typ reflect.Type) *registry.Value {
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var reqType reflect.Type
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switch typ.NumIn() {
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case 1:
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reqType = typ.In(0)
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case 2:
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reqType = typ.In(1)
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case 3:
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reqType = typ.In(2)
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default:
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return nil
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}
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return extractValue(reqType, 0)
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}
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65
extractor_test.go
Normal file
65
extractor_test.go
Normal file
@ -0,0 +1,65 @@
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package grpc
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import (
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"context"
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"reflect"
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"testing"
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"github.com/micro/go-micro/registry"
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)
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type testHandler struct{}
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type testRequest struct{}
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type testResponse struct{}
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func (t *testHandler) Test(ctx context.Context, req *testRequest, rsp *testResponse) error {
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return nil
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}
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func TestExtractEndpoint(t *testing.T) {
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handler := &testHandler{}
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typ := reflect.TypeOf(handler)
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var endpoints []*registry.Endpoint
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for m := 0; m < typ.NumMethod(); m++ {
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if e := extractEndpoint(typ.Method(m)); e != nil {
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endpoints = append(endpoints, e)
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}
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}
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|
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if i := len(endpoints); i != 1 {
|
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t.Errorf("Expected 1 endpoint, have %d", i)
|
||||
}
|
||||
|
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if endpoints[0].Name != "Test" {
|
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t.Errorf("Expected handler Test, got %s", endpoints[0].Name)
|
||||
}
|
||||
|
||||
if endpoints[0].Request == nil {
|
||||
t.Error("Expected non nil request")
|
||||
}
|
||||
|
||||
if endpoints[0].Response == nil {
|
||||
t.Error("Expected non nil request")
|
||||
}
|
||||
|
||||
if endpoints[0].Request.Name != "testRequest" {
|
||||
t.Errorf("Expected testRequest got %s", endpoints[0].Request.Name)
|
||||
}
|
||||
|
||||
if endpoints[0].Response.Name != "testResponse" {
|
||||
t.Errorf("Expected testResponse got %s", endpoints[0].Response.Name)
|
||||
}
|
||||
|
||||
if endpoints[0].Request.Type != "testRequest" {
|
||||
t.Errorf("Expected testRequest type got %s", endpoints[0].Request.Type)
|
||||
}
|
||||
|
||||
if endpoints[0].Response.Type != "testResponse" {
|
||||
t.Errorf("Expected testResponse type got %s", endpoints[0].Response.Type)
|
||||
}
|
||||
|
||||
}
|
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731
grpc.go
Normal file
731
grpc.go
Normal file
@ -0,0 +1,731 @@
|
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// Package grpc provides a grpc server
|
||||
package grpc
|
||||
|
||||
import (
|
||||
"context"
|
||||
"crypto/tls"
|
||||
"fmt"
|
||||
"net"
|
||||
"reflect"
|
||||
"sort"
|
||||
"strconv"
|
||||
"strings"
|
||||
"sync"
|
||||
"time"
|
||||
|
||||
"github.com/micro/go-micro/broker"
|
||||
"github.com/micro/go-micro/cmd"
|
||||
"github.com/micro/go-micro/codec"
|
||||
"github.com/micro/go-micro/errors"
|
||||
meta "github.com/micro/go-micro/metadata"
|
||||
"github.com/micro/go-micro/registry"
|
||||
"github.com/micro/go-micro/server"
|
||||
"github.com/micro/go-micro/util/addr"
|
||||
mgrpc "github.com/micro/go-micro/util/grpc"
|
||||
"github.com/micro/go-micro/util/log"
|
||||
|
||||
"google.golang.org/grpc"
|
||||
"google.golang.org/grpc/codes"
|
||||
"google.golang.org/grpc/credentials"
|
||||
"google.golang.org/grpc/encoding"
|
||||
"google.golang.org/grpc/metadata"
|
||||
"google.golang.org/grpc/status"
|
||||
)
|
||||
|
||||
var (
|
||||
// DefaultMaxMsgSize define maximum message size that server can send
|
||||
// or receive. Default value is 4MB.
|
||||
DefaultMaxMsgSize = 1024 * 1024 * 4
|
||||
)
|
||||
|
||||
const (
|
||||
defaultContentType = "application/grpc"
|
||||
)
|
||||
|
||||
type grpcServer struct {
|
||||
rpc *rServer
|
||||
srv *grpc.Server
|
||||
exit chan chan error
|
||||
wg *sync.WaitGroup
|
||||
|
||||
sync.RWMutex
|
||||
opts server.Options
|
||||
handlers map[string]server.Handler
|
||||
subscribers map[*subscriber][]broker.Subscriber
|
||||
// used for first registration
|
||||
registered bool
|
||||
}
|
||||
|
||||
func init() {
|
||||
encoding.RegisterCodec(jsonCodec{})
|
||||
encoding.RegisterCodec(bytesCodec{})
|
||||
|
||||
cmd.DefaultServers["grpc"] = NewServer
|
||||
}
|
||||
|
||||
func newGRPCServer(opts ...server.Option) server.Server {
|
||||
options := newOptions(opts...)
|
||||
|
||||
// create a grpc server
|
||||
srv := &grpcServer{
|
||||
opts: options,
|
||||
rpc: &rServer{
|
||||
serviceMap: make(map[string]*service),
|
||||
},
|
||||
handlers: make(map[string]server.Handler),
|
||||
subscribers: make(map[*subscriber][]broker.Subscriber),
|
||||
exit: make(chan chan error),
|
||||
wg: wait(options.Context),
|
||||
}
|
||||
|
||||
// configure the grpc server
|
||||
srv.configure()
|
||||
|
||||
return srv
|
||||
}
|
||||
|
||||
func (g *grpcServer) configure(opts ...server.Option) {
|
||||
// Don't reprocess where there's no config
|
||||
if len(opts) == 0 && g.srv != nil {
|
||||
return
|
||||
}
|
||||
|
||||
for _, o := range opts {
|
||||
o(&g.opts)
|
||||
}
|
||||
|
||||
maxMsgSize := g.getMaxMsgSize()
|
||||
|
||||
gopts := []grpc.ServerOption{
|
||||
grpc.MaxRecvMsgSize(maxMsgSize),
|
||||
grpc.MaxSendMsgSize(maxMsgSize),
|
||||
grpc.UnknownServiceHandler(g.handler),
|
||||
}
|
||||
|
||||
if creds := g.getCredentials(); creds != nil {
|
||||
gopts = append(gopts, grpc.Creds(creds))
|
||||
}
|
||||
|
||||
if opts := g.getGrpcOptions(); opts != nil {
|
||||
gopts = append(gopts, opts...)
|
||||
}
|
||||
|
||||
g.srv = grpc.NewServer(gopts...)
|
||||
}
|
||||
|
||||
func (g *grpcServer) getMaxMsgSize() int {
|
||||
if g.opts.Context == nil {
|
||||
return DefaultMaxMsgSize
|
||||
}
|
||||
s, ok := g.opts.Context.Value(maxMsgSizeKey{}).(int)
|
||||
if !ok {
|
||||
return DefaultMaxMsgSize
|
||||
}
|
||||
return s
|
||||
}
|
||||
|
||||
func (g *grpcServer) getCredentials() credentials.TransportCredentials {
|
||||
if g.opts.Context != nil {
|
||||
if v := g.opts.Context.Value(tlsAuth{}); v != nil {
|
||||
tls := v.(*tls.Config)
|
||||
return credentials.NewTLS(tls)
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (g *grpcServer) getGrpcOptions() []grpc.ServerOption {
|
||||
if g.opts.Context == nil {
|
||||
return nil
|
||||
}
|
||||
|
||||
v := g.opts.Context.Value(grpcOptions{})
|
||||
|
||||
if v == nil {
|
||||
return nil
|
||||
}
|
||||
|
||||
opts, ok := v.([]grpc.ServerOption)
|
||||
|
||||
if !ok {
|
||||
return nil
|
||||
}
|
||||
|
||||
return opts
|
||||
}
|
||||
|
||||
func (g *grpcServer) handler(srv interface{}, stream grpc.ServerStream) error {
|
||||
if g.wg != nil {
|
||||
g.wg.Add(1)
|
||||
defer g.wg.Done()
|
||||
}
|
||||
|
||||
fullMethod, ok := grpc.MethodFromServerStream(stream)
|
||||
if !ok {
|
||||
return grpc.Errorf(codes.Internal, "method does not exist in context")
|
||||
}
|
||||
|
||||
serviceName, methodName, err := mgrpc.ServiceMethod(fullMethod)
|
||||
if err != nil {
|
||||
return status.New(codes.InvalidArgument, err.Error()).Err()
|
||||
}
|
||||
|
||||
g.rpc.mu.Lock()
|
||||
service := g.rpc.serviceMap[serviceName]
|
||||
g.rpc.mu.Unlock()
|
||||
|
||||
if service == nil {
|
||||
return status.New(codes.Unimplemented, fmt.Sprintf("unknown service %v", service)).Err()
|
||||
}
|
||||
|
||||
mtype := service.method[methodName]
|
||||
if mtype == nil {
|
||||
return status.New(codes.Unimplemented, fmt.Sprintf("unknown service %v", service)).Err()
|
||||
}
|
||||
|
||||
// get grpc metadata
|
||||
gmd, ok := metadata.FromIncomingContext(stream.Context())
|
||||
if !ok {
|
||||
gmd = metadata.MD{}
|
||||
}
|
||||
|
||||
// copy the metadata to go-micro.metadata
|
||||
md := meta.Metadata{}
|
||||
for k, v := range gmd {
|
||||
md[k] = strings.Join(v, ", ")
|
||||
}
|
||||
|
||||
// timeout for server deadline
|
||||
to := md["timeout"]
|
||||
|
||||
// get content type
|
||||
ct := defaultContentType
|
||||
if ctype, ok := md["x-content-type"]; ok {
|
||||
ct = ctype
|
||||
}
|
||||
|
||||
delete(md, "x-content-type")
|
||||
delete(md, "timeout")
|
||||
|
||||
// create new context
|
||||
ctx := meta.NewContext(stream.Context(), md)
|
||||
|
||||
// set the timeout if we have it
|
||||
if len(to) > 0 {
|
||||
if n, err := strconv.ParseUint(to, 10, 64); err == nil {
|
||||
ctx, _ = context.WithTimeout(ctx, time.Duration(n))
|
||||
}
|
||||
}
|
||||
|
||||
// process unary
|
||||
if !mtype.stream {
|
||||
return g.processRequest(stream, service, mtype, ct, ctx)
|
||||
}
|
||||
|
||||
// process stream
|
||||
return g.processStream(stream, service, mtype, ct, ctx)
|
||||
}
|
||||
|
||||
func (g *grpcServer) processRequest(stream grpc.ServerStream, service *service, mtype *methodType, ct string, ctx context.Context) error {
|
||||
for {
|
||||
var argv, replyv reflect.Value
|
||||
|
||||
// Decode the argument value.
|
||||
argIsValue := false // if true, need to indirect before calling.
|
||||
if mtype.ArgType.Kind() == reflect.Ptr {
|
||||
argv = reflect.New(mtype.ArgType.Elem())
|
||||
} else {
|
||||
argv = reflect.New(mtype.ArgType)
|
||||
argIsValue = true
|
||||
}
|
||||
|
||||
// Unmarshal request
|
||||
if err := stream.RecvMsg(argv.Interface()); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if argIsValue {
|
||||
argv = argv.Elem()
|
||||
}
|
||||
|
||||
// reply value
|
||||
replyv = reflect.New(mtype.ReplyType.Elem())
|
||||
|
||||
function := mtype.method.Func
|
||||
var returnValues []reflect.Value
|
||||
|
||||
cc, err := g.newGRPCCodec(ct)
|
||||
if err != nil {
|
||||
return errors.InternalServerError("go.micro.server", err.Error())
|
||||
}
|
||||
b, err := cc.Marshal(argv.Interface())
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// create a client.Request
|
||||
r := &rpcRequest{
|
||||
service: g.opts.Name,
|
||||
contentType: ct,
|
||||
method: fmt.Sprintf("%s.%s", service.name, mtype.method.Name),
|
||||
body: b,
|
||||
payload: argv.Interface(),
|
||||
}
|
||||
|
||||
// define the handler func
|
||||
fn := func(ctx context.Context, req server.Request, rsp interface{}) error {
|
||||
returnValues = function.Call([]reflect.Value{service.rcvr, mtype.prepareContext(ctx), reflect.ValueOf(argv.Interface()), reflect.ValueOf(rsp)})
|
||||
|
||||
// The return value for the method is an error.
|
||||
if err := returnValues[0].Interface(); err != nil {
|
||||
return err.(error)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// wrap the handler func
|
||||
for i := len(g.opts.HdlrWrappers); i > 0; i-- {
|
||||
fn = g.opts.HdlrWrappers[i-1](fn)
|
||||
}
|
||||
|
||||
statusCode := codes.OK
|
||||
statusDesc := ""
|
||||
|
||||
// execute the handler
|
||||
if appErr := fn(ctx, r, replyv.Interface()); appErr != nil {
|
||||
if err, ok := appErr.(*rpcError); ok {
|
||||
statusCode = err.code
|
||||
statusDesc = err.desc
|
||||
} else if err, ok := appErr.(*errors.Error); ok {
|
||||
statusCode = microError(err)
|
||||
statusDesc = appErr.Error()
|
||||
} else {
|
||||
statusCode = convertCode(appErr)
|
||||
statusDesc = appErr.Error()
|
||||
}
|
||||
return status.New(statusCode, statusDesc).Err()
|
||||
}
|
||||
if err := stream.SendMsg(replyv.Interface()); err != nil {
|
||||
return err
|
||||
}
|
||||
return status.New(statusCode, statusDesc).Err()
|
||||
}
|
||||
}
|
||||
|
||||
func (g *grpcServer) processStream(stream grpc.ServerStream, service *service, mtype *methodType, ct string, ctx context.Context) error {
|
||||
opts := g.opts
|
||||
|
||||
r := &rpcRequest{
|
||||
service: opts.Name,
|
||||
contentType: ct,
|
||||
method: fmt.Sprintf("%s.%s", service.name, mtype.method.Name),
|
||||
stream: true,
|
||||
}
|
||||
|
||||
ss := &rpcStream{
|
||||
request: r,
|
||||
s: stream,
|
||||
}
|
||||
|
||||
function := mtype.method.Func
|
||||
var returnValues []reflect.Value
|
||||
|
||||
// Invoke the method, providing a new value for the reply.
|
||||
fn := func(ctx context.Context, req server.Request, stream interface{}) error {
|
||||
returnValues = function.Call([]reflect.Value{service.rcvr, mtype.prepareContext(ctx), reflect.ValueOf(stream)})
|
||||
if err := returnValues[0].Interface(); err != nil {
|
||||
return err.(error)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
for i := len(opts.HdlrWrappers); i > 0; i-- {
|
||||
fn = opts.HdlrWrappers[i-1](fn)
|
||||
}
|
||||
|
||||
statusCode := codes.OK
|
||||
statusDesc := ""
|
||||
|
||||
appErr := fn(ctx, r, ss)
|
||||
if appErr != nil {
|
||||
if err, ok := appErr.(*rpcError); ok {
|
||||
statusCode = err.code
|
||||
statusDesc = err.desc
|
||||
} else if err, ok := appErr.(*errors.Error); ok {
|
||||
statusCode = microError(err)
|
||||
statusDesc = appErr.Error()
|
||||
} else {
|
||||
statusCode = convertCode(appErr)
|
||||
statusDesc = appErr.Error()
|
||||
}
|
||||
}
|
||||
|
||||
return status.New(statusCode, statusDesc).Err()
|
||||
}
|
||||
|
||||
func (g *grpcServer) newGRPCCodec(contentType string) (encoding.Codec, error) {
|
||||
codecs := make(map[string]encoding.Codec)
|
||||
if g.opts.Context != nil {
|
||||
if v := g.opts.Context.Value(codecsKey{}); v != nil {
|
||||
codecs = v.(map[string]encoding.Codec)
|
||||
}
|
||||
}
|
||||
if c, ok := codecs[contentType]; ok {
|
||||
return c, nil
|
||||
}
|
||||
if c, ok := defaultGRPCCodecs[contentType]; ok {
|
||||
return c, nil
|
||||
}
|
||||
return nil, fmt.Errorf("Unsupported Content-Type: %s", contentType)
|
||||
}
|
||||
|
||||
func (g *grpcServer) newCodec(contentType string) (codec.NewCodec, error) {
|
||||
if cf, ok := g.opts.Codecs[contentType]; ok {
|
||||
return cf, nil
|
||||
}
|
||||
if cf, ok := defaultRPCCodecs[contentType]; ok {
|
||||
return cf, nil
|
||||
}
|
||||
return nil, fmt.Errorf("Unsupported Content-Type: %s", contentType)
|
||||
}
|
||||
|
||||
func (g *grpcServer) Options() server.Options {
|
||||
opts := g.opts
|
||||
return opts
|
||||
}
|
||||
|
||||
func (g *grpcServer) Init(opts ...server.Option) error {
|
||||
g.configure(opts...)
|
||||
return nil
|
||||
}
|
||||
|
||||
func (g *grpcServer) NewHandler(h interface{}, opts ...server.HandlerOption) server.Handler {
|
||||
return newRpcHandler(h, opts...)
|
||||
}
|
||||
|
||||
func (g *grpcServer) Handle(h server.Handler) error {
|
||||
if err := g.rpc.register(h.Handler()); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
g.handlers[h.Name()] = h
|
||||
return nil
|
||||
}
|
||||
|
||||
func (g *grpcServer) NewSubscriber(topic string, sb interface{}, opts ...server.SubscriberOption) server.Subscriber {
|
||||
return newSubscriber(topic, sb, opts...)
|
||||
}
|
||||
|
||||
func (g *grpcServer) Subscribe(sb server.Subscriber) error {
|
||||
sub, ok := sb.(*subscriber)
|
||||
if !ok {
|
||||
return fmt.Errorf("invalid subscriber: expected *subscriber")
|
||||
}
|
||||
if len(sub.handlers) == 0 {
|
||||
return fmt.Errorf("invalid subscriber: no handler functions")
|
||||
}
|
||||
|
||||
if err := validateSubscriber(sb); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
g.Lock()
|
||||
|
||||
_, ok = g.subscribers[sub]
|
||||
if ok {
|
||||
return fmt.Errorf("subscriber %v already exists", sub)
|
||||
}
|
||||
g.subscribers[sub] = nil
|
||||
g.Unlock()
|
||||
return nil
|
||||
}
|
||||
|
||||
func (g *grpcServer) Register() error {
|
||||
// parse address for host, port
|
||||
config := g.opts
|
||||
var advt, host string
|
||||
var port int
|
||||
|
||||
// check the advertise address first
|
||||
// if it exists then use it, otherwise
|
||||
// use the address
|
||||
if len(config.Advertise) > 0 {
|
||||
advt = config.Advertise
|
||||
} else {
|
||||
advt = config.Address
|
||||
}
|
||||
|
||||
parts := strings.Split(advt, ":")
|
||||
if len(parts) > 1 {
|
||||
host = strings.Join(parts[:len(parts)-1], ":")
|
||||
port, _ = strconv.Atoi(parts[len(parts)-1])
|
||||
} else {
|
||||
host = parts[0]
|
||||
}
|
||||
|
||||
addr, err := addr.Extract(host)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// register service
|
||||
node := ®istry.Node{
|
||||
Id: config.Name + "-" + config.Id,
|
||||
Address: addr,
|
||||
Port: port,
|
||||
Metadata: config.Metadata,
|
||||
}
|
||||
|
||||
node.Metadata["broker"] = config.Broker.String()
|
||||
node.Metadata["registry"] = config.Registry.String()
|
||||
node.Metadata["server"] = g.String()
|
||||
node.Metadata["transport"] = g.String()
|
||||
// node.Metadata["transport"] = config.Transport.String()
|
||||
|
||||
g.RLock()
|
||||
// Maps are ordered randomly, sort the keys for consistency
|
||||
var handlerList []string
|
||||
for n, e := range g.handlers {
|
||||
// Only advertise non internal handlers
|
||||
if !e.Options().Internal {
|
||||
handlerList = append(handlerList, n)
|
||||
}
|
||||
}
|
||||
sort.Strings(handlerList)
|
||||
|
||||
var subscriberList []*subscriber
|
||||
for e := range g.subscribers {
|
||||
// Only advertise non internal subscribers
|
||||
if !e.Options().Internal {
|
||||
subscriberList = append(subscriberList, e)
|
||||
}
|
||||
}
|
||||
sort.Slice(subscriberList, func(i, j int) bool {
|
||||
return subscriberList[i].topic > subscriberList[j].topic
|
||||
})
|
||||
|
||||
var endpoints []*registry.Endpoint
|
||||
for _, n := range handlerList {
|
||||
endpoints = append(endpoints, g.handlers[n].Endpoints()...)
|
||||
}
|
||||
for _, e := range subscriberList {
|
||||
endpoints = append(endpoints, e.Endpoints()...)
|
||||
}
|
||||
g.RUnlock()
|
||||
|
||||
service := ®istry.Service{
|
||||
Name: config.Name,
|
||||
Version: config.Version,
|
||||
Nodes: []*registry.Node{node},
|
||||
Endpoints: endpoints,
|
||||
}
|
||||
|
||||
g.Lock()
|
||||
registered := g.registered
|
||||
g.Unlock()
|
||||
|
||||
if !registered {
|
||||
log.Logf("Registering node: %s", node.Id)
|
||||
}
|
||||
|
||||
// create registry options
|
||||
rOpts := []registry.RegisterOption{registry.RegisterTTL(config.RegisterTTL)}
|
||||
|
||||
if err := config.Registry.Register(service, rOpts...); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// already registered? don't need to register subscribers
|
||||
if registered {
|
||||
return nil
|
||||
}
|
||||
|
||||
g.Lock()
|
||||
defer g.Unlock()
|
||||
|
||||
g.registered = true
|
||||
|
||||
for sb, _ := range g.subscribers {
|
||||
handler := g.createSubHandler(sb, g.opts)
|
||||
var opts []broker.SubscribeOption
|
||||
if queue := sb.Options().Queue; len(queue) > 0 {
|
||||
opts = append(opts, broker.Queue(queue))
|
||||
}
|
||||
|
||||
if !sb.Options().AutoAck {
|
||||
opts = append(opts, broker.DisableAutoAck())
|
||||
}
|
||||
|
||||
sub, err := config.Broker.Subscribe(sb.Topic(), handler, opts...)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
g.subscribers[sb] = []broker.Subscriber{sub}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (g *grpcServer) Deregister() error {
|
||||
config := g.opts
|
||||
var advt, host string
|
||||
var port int
|
||||
|
||||
// check the advertise address first
|
||||
// if it exists then use it, otherwise
|
||||
// use the address
|
||||
if len(config.Advertise) > 0 {
|
||||
advt = config.Advertise
|
||||
} else {
|
||||
advt = config.Address
|
||||
}
|
||||
|
||||
parts := strings.Split(advt, ":")
|
||||
if len(parts) > 1 {
|
||||
host = strings.Join(parts[:len(parts)-1], ":")
|
||||
port, _ = strconv.Atoi(parts[len(parts)-1])
|
||||
} else {
|
||||
host = parts[0]
|
||||
}
|
||||
|
||||
addr, err := addr.Extract(host)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
node := ®istry.Node{
|
||||
Id: config.Name + "-" + config.Id,
|
||||
Address: addr,
|
||||
Port: port,
|
||||
}
|
||||
|
||||
service := ®istry.Service{
|
||||
Name: config.Name,
|
||||
Version: config.Version,
|
||||
Nodes: []*registry.Node{node},
|
||||
}
|
||||
|
||||
log.Logf("Deregistering node: %s", node.Id)
|
||||
if err := config.Registry.Deregister(service); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
g.Lock()
|
||||
|
||||
if !g.registered {
|
||||
g.Unlock()
|
||||
return nil
|
||||
}
|
||||
|
||||
g.registered = false
|
||||
|
||||
for sb, subs := range g.subscribers {
|
||||
for _, sub := range subs {
|
||||
log.Logf("Unsubscribing from topic: %s", sub.Topic())
|
||||
sub.Unsubscribe()
|
||||
}
|
||||
g.subscribers[sb] = nil
|
||||
}
|
||||
|
||||
g.Unlock()
|
||||
return nil
|
||||
}
|
||||
|
||||
func (g *grpcServer) Start() error {
|
||||
registerDebugHandler(g)
|
||||
config := g.opts
|
||||
|
||||
// micro: config.Transport.Listen(config.Address)
|
||||
ts, err := net.Listen("tcp", config.Address)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
log.Logf("Server [grpc] Listening on %s", ts.Addr().String())
|
||||
g.Lock()
|
||||
g.opts.Address = ts.Addr().String()
|
||||
g.Unlock()
|
||||
|
||||
// connect to the broker
|
||||
if err := config.Broker.Connect(); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
log.Logf("Broker [%s] Listening on %s", config.Broker.String(), config.Broker.Address())
|
||||
|
||||
// announce self to the world
|
||||
if err := g.Register(); err != nil {
|
||||
log.Log("Server register error: ", err)
|
||||
}
|
||||
|
||||
// micro: go ts.Accept(s.accept)
|
||||
go func() {
|
||||
if err := g.srv.Serve(ts); err != nil {
|
||||
log.Log("gRPC Server start error: ", err)
|
||||
}
|
||||
}()
|
||||
|
||||
go func() {
|
||||
t := new(time.Ticker)
|
||||
|
||||
// only process if it exists
|
||||
if g.opts.RegisterInterval > time.Duration(0) {
|
||||
// new ticker
|
||||
t = time.NewTicker(g.opts.RegisterInterval)
|
||||
}
|
||||
|
||||
// return error chan
|
||||
var ch chan error
|
||||
|
||||
Loop:
|
||||
for {
|
||||
select {
|
||||
// register self on interval
|
||||
case <-t.C:
|
||||
if err := g.Register(); err != nil {
|
||||
log.Log("Server register error: ", err)
|
||||
}
|
||||
// wait for exit
|
||||
case ch = <-g.exit:
|
||||
break Loop
|
||||
}
|
||||
}
|
||||
|
||||
// deregister self
|
||||
if err := g.Deregister(); err != nil {
|
||||
log.Log("Server deregister error: ", err)
|
||||
}
|
||||
|
||||
// wait for waitgroup
|
||||
if g.wg != nil {
|
||||
g.wg.Wait()
|
||||
}
|
||||
|
||||
// stop the grpc server
|
||||
g.srv.GracefulStop()
|
||||
|
||||
// close transport
|
||||
ch <- nil
|
||||
|
||||
// disconnect broker
|
||||
config.Broker.Disconnect()
|
||||
}()
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (g *grpcServer) Stop() error {
|
||||
ch := make(chan error)
|
||||
g.exit <- ch
|
||||
return <-ch
|
||||
}
|
||||
|
||||
func (g *grpcServer) String() string {
|
||||
return "grpc"
|
||||
}
|
||||
|
||||
func NewServer(opts ...server.Option) server.Server {
|
||||
return newGRPCServer(opts...)
|
||||
}
|
||||
66
grpc_test.go
Normal file
66
grpc_test.go
Normal file
@ -0,0 +1,66 @@
|
||||
package grpc
|
||||
|
||||
import (
|
||||
"context"
|
||||
"testing"
|
||||
|
||||
"github.com/micro/go-micro/registry/memory"
|
||||
"github.com/micro/go-micro/server"
|
||||
"google.golang.org/grpc"
|
||||
|
||||
pb "github.com/micro/examples/greeter/srv/proto/hello"
|
||||
)
|
||||
|
||||
// server is used to implement helloworld.GreeterServer.
|
||||
type sayServer struct{}
|
||||
|
||||
// SayHello implements helloworld.GreeterServer
|
||||
func (s *sayServer) Hello(ctx context.Context, req *pb.Request, rsp *pb.Response) error {
|
||||
rsp.Msg = "Hello " + req.Name
|
||||
return nil
|
||||
}
|
||||
|
||||
func TestGRPCServer(t *testing.T) {
|
||||
r := memory.NewRegistry()
|
||||
s := NewServer(
|
||||
server.Name("foo"),
|
||||
server.Registry(r),
|
||||
)
|
||||
|
||||
pb.RegisterSayHandler(s, &sayServer{})
|
||||
|
||||
if err := s.Start(); err != nil {
|
||||
t.Fatalf("failed to start: %v", err)
|
||||
}
|
||||
|
||||
// check registration
|
||||
services, err := r.GetService("foo")
|
||||
if err != nil || len(services) == 0 {
|
||||
t.Fatalf("failed to get service: %v # %d", err, len(services))
|
||||
}
|
||||
|
||||
defer func() {
|
||||
if err := s.Stop(); err != nil {
|
||||
t.Fatalf("failed to stop: %v", err)
|
||||
}
|
||||
}()
|
||||
|
||||
cc, err := grpc.Dial(s.Options().Address, grpc.WithInsecure())
|
||||
if err != nil {
|
||||
t.Fatalf("failed to dial server: %v", err)
|
||||
}
|
||||
|
||||
testMethods := []string{"/helloworld.Say/Hello", "/greeter.helloworld.Say/Hello"}
|
||||
|
||||
for _, method := range testMethods {
|
||||
rsp := pb.Response{}
|
||||
|
||||
if err := cc.Invoke(context.Background(), method, &pb.Request{Name: "John"}, &rsp); err != nil {
|
||||
t.Fatalf("error calling server: %v", err)
|
||||
}
|
||||
|
||||
if rsp.Msg != "Hello John" {
|
||||
t.Fatalf("Got unexpected response %v", rsp.Msg)
|
||||
}
|
||||
}
|
||||
}
|
||||
66
handler.go
Normal file
66
handler.go
Normal file
@ -0,0 +1,66 @@
|
||||
package grpc
|
||||
|
||||
import (
|
||||
"reflect"
|
||||
|
||||
"github.com/micro/go-micro/registry"
|
||||
"github.com/micro/go-micro/server"
|
||||
)
|
||||
|
||||
type rpcHandler struct {
|
||||
name string
|
||||
handler interface{}
|
||||
endpoints []*registry.Endpoint
|
||||
opts server.HandlerOptions
|
||||
}
|
||||
|
||||
func newRpcHandler(handler interface{}, opts ...server.HandlerOption) server.Handler {
|
||||
options := server.HandlerOptions{
|
||||
Metadata: make(map[string]map[string]string),
|
||||
}
|
||||
|
||||
for _, o := range opts {
|
||||
o(&options)
|
||||
}
|
||||
|
||||
typ := reflect.TypeOf(handler)
|
||||
hdlr := reflect.ValueOf(handler)
|
||||
name := reflect.Indirect(hdlr).Type().Name()
|
||||
|
||||
var endpoints []*registry.Endpoint
|
||||
|
||||
for m := 0; m < typ.NumMethod(); m++ {
|
||||
if e := extractEndpoint(typ.Method(m)); e != nil {
|
||||
e.Name = name + "." + e.Name
|
||||
|
||||
for k, v := range options.Metadata[e.Name] {
|
||||
e.Metadata[k] = v
|
||||
}
|
||||
|
||||
endpoints = append(endpoints, e)
|
||||
}
|
||||
}
|
||||
|
||||
return &rpcHandler{
|
||||
name: name,
|
||||
handler: handler,
|
||||
endpoints: endpoints,
|
||||
opts: options,
|
||||
}
|
||||
}
|
||||
|
||||
func (r *rpcHandler) Name() string {
|
||||
return r.name
|
||||
}
|
||||
|
||||
func (r *rpcHandler) Handler() interface{} {
|
||||
return r.handler
|
||||
}
|
||||
|
||||
func (r *rpcHandler) Endpoints() []*registry.Endpoint {
|
||||
return r.endpoints
|
||||
}
|
||||
|
||||
func (r *rpcHandler) Options() server.HandlerOptions {
|
||||
return r.opts
|
||||
}
|
||||
113
options.go
Normal file
113
options.go
Normal file
@ -0,0 +1,113 @@
|
||||
package grpc
|
||||
|
||||
import (
|
||||
"context"
|
||||
"crypto/tls"
|
||||
|
||||
"github.com/micro/go-micro/broker"
|
||||
"github.com/micro/go-micro/codec"
|
||||
"github.com/micro/go-micro/registry"
|
||||
"github.com/micro/go-micro/server"
|
||||
"github.com/micro/go-micro/server/debug"
|
||||
"github.com/micro/go-micro/transport"
|
||||
"google.golang.org/grpc"
|
||||
"google.golang.org/grpc/encoding"
|
||||
)
|
||||
|
||||
type codecsKey struct{}
|
||||
type tlsAuth struct{}
|
||||
type maxMsgSizeKey struct{}
|
||||
type grpcOptions struct{}
|
||||
|
||||
// gRPC Codec to be used to encode/decode requests for a given content type
|
||||
func Codec(contentType string, c encoding.Codec) server.Option {
|
||||
return func(o *server.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) server.Option {
|
||||
return func(o *server.Options) {
|
||||
if o.Context == nil {
|
||||
o.Context = context.Background()
|
||||
}
|
||||
o.Context = context.WithValue(o.Context, tlsAuth{}, t)
|
||||
}
|
||||
}
|
||||
|
||||
// Options to be used to configure gRPC options
|
||||
func Options(opts ...grpc.ServerOption) server.Option {
|
||||
return func(o *server.Options) {
|
||||
if o.Context == nil {
|
||||
o.Context = context.Background()
|
||||
}
|
||||
o.Context = context.WithValue(o.Context, grpcOptions{}, opts)
|
||||
}
|
||||
}
|
||||
|
||||
//
|
||||
// MaxMsgSize set the maximum message in bytes the server can receive and
|
||||
// send. Default maximum message size is 4 MB.
|
||||
//
|
||||
func MaxMsgSize(s int) server.Option {
|
||||
return func(o *server.Options) {
|
||||
if o.Context == nil {
|
||||
o.Context = context.Background()
|
||||
}
|
||||
o.Context = context.WithValue(o.Context, maxMsgSizeKey{}, s)
|
||||
}
|
||||
}
|
||||
|
||||
func newOptions(opt ...server.Option) server.Options {
|
||||
opts := server.Options{
|
||||
Codecs: make(map[string]codec.NewCodec),
|
||||
Metadata: map[string]string{},
|
||||
}
|
||||
|
||||
for _, o := range opt {
|
||||
o(&opts)
|
||||
}
|
||||
|
||||
if opts.Broker == nil {
|
||||
opts.Broker = broker.DefaultBroker
|
||||
}
|
||||
|
||||
if opts.Registry == nil {
|
||||
opts.Registry = registry.DefaultRegistry
|
||||
}
|
||||
|
||||
if opts.Transport == nil {
|
||||
opts.Transport = transport.DefaultTransport
|
||||
}
|
||||
|
||||
if opts.DebugHandler == nil {
|
||||
opts.DebugHandler = debug.DefaultDebugHandler
|
||||
}
|
||||
|
||||
if len(opts.Address) == 0 {
|
||||
opts.Address = server.DefaultAddress
|
||||
}
|
||||
|
||||
if len(opts.Name) == 0 {
|
||||
opts.Name = server.DefaultName
|
||||
}
|
||||
|
||||
if len(opts.Id) == 0 {
|
||||
opts.Id = server.DefaultId
|
||||
}
|
||||
|
||||
if len(opts.Version) == 0 {
|
||||
opts.Version = server.DefaultVersion
|
||||
}
|
||||
|
||||
return opts
|
||||
}
|
||||
70
request.go
Normal file
70
request.go
Normal file
@ -0,0 +1,70 @@
|
||||
package grpc
|
||||
|
||||
import (
|
||||
"github.com/micro/go-micro/codec"
|
||||
)
|
||||
|
||||
type rpcRequest struct {
|
||||
service string
|
||||
method string
|
||||
contentType string
|
||||
codec codec.Codec
|
||||
header map[string]string
|
||||
body []byte
|
||||
stream bool
|
||||
payload interface{}
|
||||
}
|
||||
|
||||
type rpcMessage struct {
|
||||
topic string
|
||||
contentType string
|
||||
payload interface{}
|
||||
}
|
||||
|
||||
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.method
|
||||
}
|
||||
|
||||
func (r *rpcRequest) Codec() codec.Reader {
|
||||
return r.codec
|
||||
}
|
||||
|
||||
func (r *rpcRequest) Header() map[string]string {
|
||||
return r.header
|
||||
}
|
||||
|
||||
func (r *rpcRequest) Read() ([]byte, error) {
|
||||
return r.body, nil
|
||||
}
|
||||
|
||||
func (r *rpcRequest) Stream() bool {
|
||||
return r.stream
|
||||
}
|
||||
|
||||
func (r *rpcRequest) Body() interface{} {
|
||||
return r.payload
|
||||
}
|
||||
|
||||
func (r *rpcMessage) ContentType() string {
|
||||
return r.contentType
|
||||
}
|
||||
|
||||
func (r *rpcMessage) Topic() string {
|
||||
return r.topic
|
||||
}
|
||||
|
||||
func (r *rpcMessage) Payload() interface{} {
|
||||
return r.payload
|
||||
}
|
||||
180
server.go
Normal file
180
server.go
Normal file
@ -0,0 +1,180 @@
|
||||
package grpc
|
||||
|
||||
// Copyright 2009 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
//
|
||||
// Meh, we need to get rid of this shit
|
||||
|
||||
import (
|
||||
"context"
|
||||
"errors"
|
||||
"reflect"
|
||||
"sync"
|
||||
"unicode"
|
||||
"unicode/utf8"
|
||||
|
||||
"github.com/micro/go-micro/server"
|
||||
"github.com/micro/go-micro/util/log"
|
||||
)
|
||||
|
||||
var (
|
||||
// Precompute the reflect type for error. Can't use error directly
|
||||
// because Typeof takes an empty interface value. This is annoying.
|
||||
typeOfError = reflect.TypeOf((*error)(nil)).Elem()
|
||||
)
|
||||
|
||||
type methodType struct {
|
||||
method reflect.Method
|
||||
ArgType reflect.Type
|
||||
ReplyType reflect.Type
|
||||
ContextType reflect.Type
|
||||
stream bool
|
||||
}
|
||||
|
||||
type service struct {
|
||||
name string // name of service
|
||||
rcvr reflect.Value // receiver of methods for the service
|
||||
typ reflect.Type // type of the receiver
|
||||
method map[string]*methodType // registered methods
|
||||
}
|
||||
|
||||
// server represents an RPC Server.
|
||||
type rServer struct {
|
||||
mu sync.Mutex // protects the serviceMap
|
||||
serviceMap map[string]*service
|
||||
}
|
||||
|
||||
// Is this an exported - upper case - name?
|
||||
func isExported(name string) bool {
|
||||
rune, _ := utf8.DecodeRuneInString(name)
|
||||
return unicode.IsUpper(rune)
|
||||
}
|
||||
|
||||
// Is this type exported or a builtin?
|
||||
func isExportedOrBuiltinType(t reflect.Type) bool {
|
||||
for t.Kind() == reflect.Ptr {
|
||||
t = t.Elem()
|
||||
}
|
||||
// PkgPath will be non-empty even for an exported type,
|
||||
// so we need to check the type name as well.
|
||||
return isExported(t.Name()) || t.PkgPath() == ""
|
||||
}
|
||||
|
||||
// prepareEndpoint() returns a methodType for the provided method or nil
|
||||
// in case if the method was unsuitable.
|
||||
func prepareEndpoint(method reflect.Method) *methodType {
|
||||
mtype := method.Type
|
||||
mname := method.Name
|
||||
var replyType, argType, contextType reflect.Type
|
||||
var stream bool
|
||||
|
||||
// Endpoint() must be exported.
|
||||
if method.PkgPath != "" {
|
||||
return nil
|
||||
}
|
||||
|
||||
switch mtype.NumIn() {
|
||||
case 3:
|
||||
// assuming streaming
|
||||
argType = mtype.In(2)
|
||||
contextType = mtype.In(1)
|
||||
stream = true
|
||||
case 4:
|
||||
// method that takes a context
|
||||
argType = mtype.In(2)
|
||||
replyType = mtype.In(3)
|
||||
contextType = mtype.In(1)
|
||||
default:
|
||||
log.Log("method", mname, "of", mtype, "has wrong number of ins:", mtype.NumIn())
|
||||
return nil
|
||||
}
|
||||
|
||||
if stream {
|
||||
// check stream type
|
||||
streamType := reflect.TypeOf((*server.Stream)(nil)).Elem()
|
||||
if !argType.Implements(streamType) {
|
||||
log.Log(mname, "argument does not implement Streamer interface:", argType)
|
||||
return nil
|
||||
}
|
||||
} else {
|
||||
// if not stream check the replyType
|
||||
|
||||
// First arg need not be a pointer.
|
||||
if !isExportedOrBuiltinType(argType) {
|
||||
log.Log(mname, "argument type not exported:", argType)
|
||||
return nil
|
||||
}
|
||||
|
||||
if replyType.Kind() != reflect.Ptr {
|
||||
log.Log("method", mname, "reply type not a pointer:", replyType)
|
||||
return nil
|
||||
}
|
||||
|
||||
// Reply type must be exported.
|
||||
if !isExportedOrBuiltinType(replyType) {
|
||||
log.Log("method", mname, "reply type not exported:", replyType)
|
||||
return nil
|
||||
}
|
||||
}
|
||||
|
||||
// Endpoint() needs one out.
|
||||
if mtype.NumOut() != 1 {
|
||||
log.Log("method", mname, "has wrong number of outs:", mtype.NumOut())
|
||||
return nil
|
||||
}
|
||||
// The return type of the method must be error.
|
||||
if returnType := mtype.Out(0); returnType != typeOfError {
|
||||
log.Log("method", mname, "returns", returnType.String(), "not error")
|
||||
return nil
|
||||
}
|
||||
return &methodType{method: method, ArgType: argType, ReplyType: replyType, ContextType: contextType, stream: stream}
|
||||
}
|
||||
|
||||
func (server *rServer) register(rcvr interface{}) error {
|
||||
server.mu.Lock()
|
||||
defer server.mu.Unlock()
|
||||
if server.serviceMap == nil {
|
||||
server.serviceMap = make(map[string]*service)
|
||||
}
|
||||
s := new(service)
|
||||
s.typ = reflect.TypeOf(rcvr)
|
||||
s.rcvr = reflect.ValueOf(rcvr)
|
||||
sname := reflect.Indirect(s.rcvr).Type().Name()
|
||||
if sname == "" {
|
||||
log.Fatal("rpc: no service name for type", s.typ.String())
|
||||
}
|
||||
if !isExported(sname) {
|
||||
s := "rpc Register: type " + sname + " is not exported"
|
||||
log.Log(s)
|
||||
return errors.New(s)
|
||||
}
|
||||
if _, present := server.serviceMap[sname]; present {
|
||||
return errors.New("rpc: service already defined: " + sname)
|
||||
}
|
||||
s.name = sname
|
||||
s.method = make(map[string]*methodType)
|
||||
|
||||
// Install the methods
|
||||
for m := 0; m < s.typ.NumMethod(); m++ {
|
||||
method := s.typ.Method(m)
|
||||
if mt := prepareEndpoint(method); mt != nil {
|
||||
s.method[method.Name] = mt
|
||||
}
|
||||
}
|
||||
|
||||
if len(s.method) == 0 {
|
||||
s := "rpc Register: type " + sname + " has no exported methods of suitable type"
|
||||
log.Log(s)
|
||||
return errors.New(s)
|
||||
}
|
||||
server.serviceMap[s.name] = s
|
||||
return nil
|
||||
}
|
||||
|
||||
func (m *methodType) prepareContext(ctx context.Context) reflect.Value {
|
||||
if contextv := reflect.ValueOf(ctx); contextv.IsValid() {
|
||||
return contextv
|
||||
}
|
||||
return reflect.Zero(m.ContextType)
|
||||
}
|
||||
38
stream.go
Normal file
38
stream.go
Normal file
@ -0,0 +1,38 @@
|
||||
package grpc
|
||||
|
||||
import (
|
||||
"context"
|
||||
|
||||
"github.com/micro/go-micro/server"
|
||||
"google.golang.org/grpc"
|
||||
)
|
||||
|
||||
// rpcStream implements a server side Stream.
|
||||
type rpcStream struct {
|
||||
s grpc.ServerStream
|
||||
request server.Request
|
||||
}
|
||||
|
||||
func (r *rpcStream) Close() error {
|
||||
return nil
|
||||
}
|
||||
|
||||
func (r *rpcStream) Error() error {
|
||||
return nil
|
||||
}
|
||||
|
||||
func (r *rpcStream) Request() server.Request {
|
||||
return r.request
|
||||
}
|
||||
|
||||
func (r *rpcStream) Context() context.Context {
|
||||
return r.s.Context()
|
||||
}
|
||||
|
||||
func (r *rpcStream) Send(m interface{}) error {
|
||||
return r.s.SendMsg(m)
|
||||
}
|
||||
|
||||
func (r *rpcStream) Recv(m interface{}) error {
|
||||
return r.s.RecvMsg(m)
|
||||
}
|
||||
262
subscriber.go
Normal file
262
subscriber.go
Normal file
@ -0,0 +1,262 @@
|
||||
package grpc
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"context"
|
||||
"fmt"
|
||||
"reflect"
|
||||
|
||||
"github.com/micro/go-micro/broker"
|
||||
"github.com/micro/go-micro/codec"
|
||||
"github.com/micro/go-micro/metadata"
|
||||
"github.com/micro/go-micro/registry"
|
||||
"github.com/micro/go-micro/server"
|
||||
)
|
||||
|
||||
const (
|
||||
subSig = "func(context.Context, interface{}) error"
|
||||
)
|
||||
|
||||
type handler struct {
|
||||
method reflect.Value
|
||||
reqType reflect.Type
|
||||
ctxType reflect.Type
|
||||
}
|
||||
|
||||
type subscriber struct {
|
||||
topic string
|
||||
rcvr reflect.Value
|
||||
typ reflect.Type
|
||||
subscriber interface{}
|
||||
handlers []*handler
|
||||
endpoints []*registry.Endpoint
|
||||
opts server.SubscriberOptions
|
||||
}
|
||||
|
||||
func newSubscriber(topic string, sub interface{}, opts ...server.SubscriberOption) server.Subscriber {
|
||||
|
||||
options := server.SubscriberOptions{
|
||||
AutoAck: true,
|
||||
}
|
||||
|
||||
for _, o := range opts {
|
||||
o(&options)
|
||||
}
|
||||
|
||||
var endpoints []*registry.Endpoint
|
||||
var handlers []*handler
|
||||
|
||||
if typ := reflect.TypeOf(sub); typ.Kind() == reflect.Func {
|
||||
h := &handler{
|
||||
method: reflect.ValueOf(sub),
|
||||
}
|
||||
|
||||
switch typ.NumIn() {
|
||||
case 1:
|
||||
h.reqType = typ.In(0)
|
||||
case 2:
|
||||
h.ctxType = typ.In(0)
|
||||
h.reqType = typ.In(1)
|
||||
}
|
||||
|
||||
handlers = append(handlers, h)
|
||||
|
||||
endpoints = append(endpoints, ®istry.Endpoint{
|
||||
Name: "Func",
|
||||
Request: extractSubValue(typ),
|
||||
Metadata: map[string]string{
|
||||
"topic": topic,
|
||||
"subscriber": "true",
|
||||
},
|
||||
})
|
||||
} else {
|
||||
hdlr := reflect.ValueOf(sub)
|
||||
name := reflect.Indirect(hdlr).Type().Name()
|
||||
|
||||
for m := 0; m < typ.NumMethod(); m++ {
|
||||
method := typ.Method(m)
|
||||
h := &handler{
|
||||
method: method.Func,
|
||||
}
|
||||
|
||||
switch method.Type.NumIn() {
|
||||
case 2:
|
||||
h.reqType = method.Type.In(1)
|
||||
case 3:
|
||||
h.ctxType = method.Type.In(1)
|
||||
h.reqType = method.Type.In(2)
|
||||
}
|
||||
|
||||
handlers = append(handlers, h)
|
||||
|
||||
endpoints = append(endpoints, ®istry.Endpoint{
|
||||
Name: name + "." + method.Name,
|
||||
Request: extractSubValue(method.Type),
|
||||
Metadata: map[string]string{
|
||||
"topic": topic,
|
||||
"subscriber": "true",
|
||||
},
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
return &subscriber{
|
||||
rcvr: reflect.ValueOf(sub),
|
||||
typ: reflect.TypeOf(sub),
|
||||
topic: topic,
|
||||
subscriber: sub,
|
||||
handlers: handlers,
|
||||
endpoints: endpoints,
|
||||
opts: options,
|
||||
}
|
||||
}
|
||||
|
||||
func validateSubscriber(sub server.Subscriber) error {
|
||||
typ := reflect.TypeOf(sub.Subscriber())
|
||||
var argType reflect.Type
|
||||
|
||||
if typ.Kind() == reflect.Func {
|
||||
name := "Func"
|
||||
switch typ.NumIn() {
|
||||
case 2:
|
||||
argType = typ.In(1)
|
||||
default:
|
||||
return fmt.Errorf("subscriber %v takes wrong number of args: %v required signature %s", name, typ.NumIn(), subSig)
|
||||
}
|
||||
if !isExportedOrBuiltinType(argType) {
|
||||
return fmt.Errorf("subscriber %v argument type not exported: %v", name, argType)
|
||||
}
|
||||
if typ.NumOut() != 1 {
|
||||
return fmt.Errorf("subscriber %v has wrong number of outs: %v require signature %s",
|
||||
name, typ.NumOut(), subSig)
|
||||
}
|
||||
if returnType := typ.Out(0); returnType != typeOfError {
|
||||
return fmt.Errorf("subscriber %v returns %v not error", name, returnType.String())
|
||||
}
|
||||
} else {
|
||||
hdlr := reflect.ValueOf(sub.Subscriber())
|
||||
name := reflect.Indirect(hdlr).Type().Name()
|
||||
|
||||
for m := 0; m < typ.NumMethod(); m++ {
|
||||
method := typ.Method(m)
|
||||
|
||||
switch method.Type.NumIn() {
|
||||
case 3:
|
||||
argType = method.Type.In(2)
|
||||
default:
|
||||
return fmt.Errorf("subscriber %v.%v takes wrong number of args: %v required signature %s",
|
||||
name, method.Name, method.Type.NumIn(), subSig)
|
||||
}
|
||||
|
||||
if !isExportedOrBuiltinType(argType) {
|
||||
return fmt.Errorf("%v argument type not exported: %v", name, argType)
|
||||
}
|
||||
if method.Type.NumOut() != 1 {
|
||||
return fmt.Errorf(
|
||||
"subscriber %v.%v has wrong number of outs: %v require signature %s",
|
||||
name, method.Name, method.Type.NumOut(), subSig)
|
||||
}
|
||||
if returnType := method.Type.Out(0); returnType != typeOfError {
|
||||
return fmt.Errorf("subscriber %v.%v returns %v not error", name, method.Name, returnType.String())
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (g *grpcServer) createSubHandler(sb *subscriber, opts server.Options) broker.Handler {
|
||||
return func(p broker.Publication) error {
|
||||
msg := p.Message()
|
||||
ct := msg.Header["Content-Type"]
|
||||
cf, err := g.newCodec(ct)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
hdr := make(map[string]string)
|
||||
for k, v := range msg.Header {
|
||||
hdr[k] = v
|
||||
}
|
||||
delete(hdr, "Content-Type")
|
||||
ctx := metadata.NewContext(context.Background(), hdr)
|
||||
|
||||
for i := 0; i < len(sb.handlers); i++ {
|
||||
handler := sb.handlers[i]
|
||||
|
||||
var isVal bool
|
||||
var req reflect.Value
|
||||
|
||||
if handler.reqType.Kind() == reflect.Ptr {
|
||||
req = reflect.New(handler.reqType.Elem())
|
||||
} else {
|
||||
req = reflect.New(handler.reqType)
|
||||
isVal = true
|
||||
}
|
||||
if isVal {
|
||||
req = req.Elem()
|
||||
}
|
||||
|
||||
b := &buffer{bytes.NewBuffer(msg.Body)}
|
||||
co := cf(b)
|
||||
defer co.Close()
|
||||
|
||||
if err := co.ReadHeader(&codec.Message{}, codec.Publication); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if err := co.ReadBody(req.Interface()); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
fn := func(ctx context.Context, msg server.Message) error {
|
||||
var vals []reflect.Value
|
||||
if sb.typ.Kind() != reflect.Func {
|
||||
vals = append(vals, sb.rcvr)
|
||||
}
|
||||
if handler.ctxType != nil {
|
||||
vals = append(vals, reflect.ValueOf(ctx))
|
||||
}
|
||||
|
||||
vals = append(vals, reflect.ValueOf(msg.Payload()))
|
||||
|
||||
returnValues := handler.method.Call(vals)
|
||||
if err := returnValues[0].Interface(); err != nil {
|
||||
return err.(error)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
for i := len(opts.SubWrappers); i > 0; i-- {
|
||||
fn = opts.SubWrappers[i-1](fn)
|
||||
}
|
||||
|
||||
g.wg.Add(1)
|
||||
go func() {
|
||||
defer g.wg.Done()
|
||||
fn(ctx, &rpcMessage{
|
||||
topic: sb.topic,
|
||||
contentType: ct,
|
||||
payload: req.Interface(),
|
||||
})
|
||||
}()
|
||||
}
|
||||
return nil
|
||||
}
|
||||
}
|
||||
|
||||
func (s *subscriber) Topic() string {
|
||||
return s.topic
|
||||
}
|
||||
|
||||
func (s *subscriber) Subscriber() interface{} {
|
||||
return s.subscriber
|
||||
}
|
||||
|
||||
func (s *subscriber) Endpoints() []*registry.Endpoint {
|
||||
return s.endpoints
|
||||
}
|
||||
|
||||
func (s *subscriber) Options() server.SubscriberOptions {
|
||||
return s.opts
|
||||
}
|
||||
60
util.go
Normal file
60
util.go
Normal file
@ -0,0 +1,60 @@
|
||||
package grpc
|
||||
|
||||
import (
|
||||
"context"
|
||||
"fmt"
|
||||
"io"
|
||||
"os"
|
||||
"sync"
|
||||
|
||||
"google.golang.org/grpc/codes"
|
||||
)
|
||||
|
||||
// rpcError defines the status from an RPC.
|
||||
type rpcError struct {
|
||||
code codes.Code
|
||||
desc string
|
||||
}
|
||||
|
||||
func (e *rpcError) Error() string {
|
||||
return fmt.Sprintf("rpc error: code = %d desc = %s", e.code, e.desc)
|
||||
}
|
||||
|
||||
// convertCode converts a standard Go error into its canonical code. Note that
|
||||
// this is only used to translate the error returned by the server applications.
|
||||
func convertCode(err error) codes.Code {
|
||||
switch err {
|
||||
case nil:
|
||||
return codes.OK
|
||||
case io.EOF:
|
||||
return codes.OutOfRange
|
||||
case io.ErrClosedPipe, io.ErrNoProgress, io.ErrShortBuffer, io.ErrShortWrite, io.ErrUnexpectedEOF:
|
||||
return codes.FailedPrecondition
|
||||
case os.ErrInvalid:
|
||||
return codes.InvalidArgument
|
||||
case context.Canceled:
|
||||
return codes.Canceled
|
||||
case context.DeadlineExceeded:
|
||||
return codes.DeadlineExceeded
|
||||
}
|
||||
switch {
|
||||
case os.IsExist(err):
|
||||
return codes.AlreadyExists
|
||||
case os.IsNotExist(err):
|
||||
return codes.NotFound
|
||||
case os.IsPermission(err):
|
||||
return codes.PermissionDenied
|
||||
}
|
||||
return codes.Unknown
|
||||
}
|
||||
|
||||
func wait(ctx context.Context) *sync.WaitGroup {
|
||||
if ctx == nil {
|
||||
return nil
|
||||
}
|
||||
wg, ok := ctx.Value("wait").(*sync.WaitGroup)
|
||||
if !ok {
|
||||
return nil
|
||||
}
|
||||
return wg
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user