Merge pull request #1 from micro/master

Update forks to latest

.travis.yml

@@ -1,9 +1,11 @@
 language: go
 go:
-- 1.11.x
 - 1.12.x
 env:
   - GO111MODULE=on
 notifications:
   slack:
     secure: aEvhLbhujaGaKSrOokiG3//PaVHTIrc3fBpoRbCRqfZpyq6WREoapJJhF+tIpWWOwaC9GmChbD6aHo/jMUgwKXVyPSaNjiEL87YzUUpL8B2zslNp1rgfTg/LrzthOx3Q1TYwpaAl3to0fuHUVFX4yMeC2vuThq7WSXgMMxFCtbc=
+cache:
+  directories:
+    - $GOPATH/pkg/mod

agent/README.md

@@ -1,197 +0,0 @@
-# Agent 
-
-Agent is a library used to create commands, inputs and robot services
-
-## Getting Started
-
-- [Commands](#commands) - Commands are functions executed by the bot based on text based pattern matching.
-- [Inputs](#inputs) - Inputs are plugins for communication e.g Slack, Telegram, IRC, etc.
-- [Services](#services) - Write bots as micro services
-
-## Commands
-
-Commands are functions executed by the bot based on text based pattern matching.
-
-### Write a Command
-
-```go
-import "github.com/micro/go-micro/agent/command"
-
-func Ping() command.Command {
-	usage := "ping"
-	description := "Returns pong"
-
-	return command.NewCommand("ping", usage, desc, func(args ...string) ([]byte, error) {
-		return []byte("pong"), nil
-	})
-}
-```
-
-### Register the command
-
-Add the command to the Commands map with a pattern key that can be matched by golang/regexp.Match
-
-```go
-import "github.com/micro/go-micro/agent/command"
-
-func init() {
-	command.Commands["^ping$"] = Ping()
-}
-```
-
-### Rebuild Micro
-
-Build binary
-```shell
-cd github.com/micro/micro
-
-// For local use
-go build -i -o micro ./main.go
-
-// For docker image
-CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -ldflags '-w' -i -o micro ./main.go
-```
-
-## Inputs
-
-Inputs are plugins for communication e.g Slack, HipChat, XMPP, IRC, SMTP, etc, etc. 
-
-New inputs can be added in the following way.
-
-### Write an Input
-
-Write an input that satisfies the Input interface.
-
-```go
-type Input interface {
-	// Provide cli flags
-	Flags() []cli.Flag
-	// Initialise input using cli context
-	Init(*cli.Context) error
-	// Stream events from the input
-	Stream() (Conn, error)
-	// Start the input
-	Start() error
-	// Stop the input
-	Stop() error
-	// name of the input
-	String() string
-}
-```
-
-### Register the input
-
-Add the input to the Inputs map.
-
-```go
-import "github.com/micro/micro/bot/input"
-
-func init() {
-	input.Inputs["name"] = MyInput
-}
-```
-
-### Rebuild Micro
-
-Build binary
-```shell
-cd github.com/micro/micro
-
-// For local use
-go build -i -o micro ./main.go
-
-// For docker image
-CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -ldflags '-w' -i -o micro ./main.go
-```
-
-## Services
-
-The micro bot supports the ability to create commands as micro services. 
-
-### How does it work?
-
-The bot watches the service registry for services with it's namespace. The default namespace is `go.micro.bot`. 
-Any service within this namespace will automatically be added to the list of available commands. When a command 
-is executed, the bot will call the service with method `Command.Exec`. It also expects the method `Command.Help` 
-to exist for usage info.
-
-
-The service interface is as follows and can be found at [go-micro/agent/proto](https://github.com/micro/go-micro/agent/blob/master/proto/bot.proto)
-
-```
-syntax = "proto3";
-
-package go.micro.bot;
-
-service Command {
-	rpc Help(HelpRequest) returns (HelpResponse) {};
-	rpc Exec(ExecRequest) returns (ExecResponse) {};
-}
-
-message HelpRequest {
-}
-
-message HelpResponse {
-	string usage = 1;
-	string description = 2;
-}
-
-message ExecRequest {
-	repeated string args = 1;
-}
-
-message ExecResponse {
-	bytes result = 1;
-	string error = 2;
-}
-```
-
-### Example
-
-Here's an example echo command as a microservice
-
-```go
-package main
-
-import (
-	"fmt"
-	"strings"
-
-	"github.com/micro/go-micro"
-	"golang.org/x/net/context"
-
-	proto "github.com/micro/go-micro/agent/proto"
-)
-
-type Command struct{}
-
-// Help returns the command usage
-func (c *Command) Help(ctx context.Context, req *proto.HelpRequest, rsp *proto.HelpResponse) error {
-	// Usage should include the name of the command
-	rsp.Usage = "echo"
-	rsp.Description = "This is an example bot command as a micro service which echos the message"
-	return nil
-}
-
-// Exec executes the command
-func (c *Command) Exec(ctx context.Context, req *proto.ExecRequest, rsp *proto.ExecResponse) error {
-	rsp.Result = []byte(strings.Join(req.Args, " "))
-	// rsp.Error could be set to return an error instead
-	// the function error would only be used for service level issues
-	return nil
-}
-
-func main() {
-	service := micro.NewService(
-		micro.Name("go.micro.bot.echo"),
-	)
-
-	service.Init()
-
-	proto.RegisterCommandHandler(service.Server(), new(Command))
-
-	if err := service.Run(); err != nil {
-		fmt.Println(err)
-	}
-}
-```

api/README.md

@@ -1,18 +0,0 @@
-# Go API [![License](https://img.shields.io/:license-apache-blue.svg)](https://opensource.org/licenses/Apache-2.0) [![GoDoc](https://godoc.org/github.com/micro/go-micro/api?status.svg)](https://godoc.org/github.com/micro/go-micro/api) [![Travis CI](https://api.travis-ci.org/micro/go-micro/api.svg?branch=master)](https://travis-ci.org/micro/go-micro/api) [![Go Report Card](https://goreportcard.com/badge/micro/go-micro/api)](https://goreportcard.com/report/github.com/micro/go-micro/api)
-
-Go API is a pluggable API framework driven by service discovery to help build powerful public API gateways.
-
-## Overview
-
-The Go API library provides api gateway routing capabilities. A microservice architecture decouples application logic into 
-separate service. An api gateway provides a single entry point to consolidate these services into a unified api. The 
-Go API uses routes defined in service discovery metadata to generate routing rules and serve http requests.
-
-<img src="https://micro.mu/docs/images/go-api.png?v=1" alt="Go API" />
-
-Go API is the basis for the [micro api](https://micro.mu/docs/api.html).
-
-## Getting Started
-
-See the [docs](https://micro.mu/docs/go-api.html) to learn more
-

api/handler/api/api.go

@@ -8,8 +8,8 @@ import (
 	"github.com/micro/go-micro/api/handler"
 	api "github.com/micro/go-micro/api/proto"
 	"github.com/micro/go-micro/client"
+	"github.com/micro/go-micro/client/selector"
 	"github.com/micro/go-micro/errors"
-	"github.com/micro/go-micro/selector"
 	"github.com/micro/go-micro/util/ctx"
 )
 

api/handler/api/util.go

@@ -9,8 +9,8 @@ import (
 	"strings"
 
 	api "github.com/micro/go-micro/api/proto"
+	"github.com/micro/go-micro/client/selector"
 	"github.com/micro/go-micro/registry"
-	"github.com/micro/go-micro/selector"
 )
 
 func requestToProto(r *http.Request) (*api.Request, error) {

api/handler/broker/broker.go

@@ -120,7 +120,7 @@ func (c *conn) writeLoop() {
 		opts = append(opts, broker.Queue(c.queue))
 	}
 
-	subscriber, err := c.b.Subscribe(c.topic, func(p broker.Publication) error {
+	subscriber, err := c.b.Subscribe(c.topic, func(p broker.Event) error {
 		b, err := json.Marshal(p.Message())
 		if err != nil {
 			return nil

api/handler/http/http.go

@@ -10,7 +10,7 @@ import (
 
 	"github.com/micro/go-micro/api"
 	"github.com/micro/go-micro/api/handler"
-	"github.com/micro/go-micro/selector"
+	"github.com/micro/go-micro/client/selector"
 )
 
 const (
@@ -73,7 +73,7 @@ func (h *httpHandler) getService(r *http.Request) (string, error) {
 		return "", nil
 	}
 
-	return fmt.Sprintf("http://%s:%d", s.Address, s.Port), nil
+	return fmt.Sprintf("http://%s", s.Address), nil
 }
 
 func (h *httpHandler) String() string {

api/handler/http/http_test.go

@@ -4,14 +4,12 @@ import (
 	"net"
 	"net/http"
 	"net/http/httptest"
-	"strconv"
-	"strings"
 	"testing"
 
 	"github.com/micro/go-micro/api/handler"
 	"github.com/micro/go-micro/api/router"
 	regRouter "github.com/micro/go-micro/api/router/registry"
-	"github.com/micro/go-micro/cmd"
+	"github.com/micro/go-micro/config/cmd"
 	"github.com/micro/go-micro/registry"
 	"github.com/micro/go-micro/registry/memory"
 )
@@ -26,21 +24,12 @@ func testHttp(t *testing.T, path, service, ns string) {
 	}
 	defer l.Close()
 
-	parts := strings.Split(l.Addr().String(), ":")
-
-	var host string
-	var port int
-
-	host = parts[0]
-	port, _ = strconv.Atoi(parts[1])
-
 	s := &registry.Service{
 		Name: service,
 		Nodes: []*registry.Node{
 			&registry.Node{
 				Id:      service + "-1",
-				Address: host,
+				Address: l.Addr().String(),
-				Port:    port,
 			},
 		},
 	}

api/handler/rpc/rpc.go

@@ -14,12 +14,12 @@ import (
 	"github.com/micro/go-micro/api/handler"
 	proto "github.com/micro/go-micro/api/internal/proto"
 	"github.com/micro/go-micro/client"
+	"github.com/micro/go-micro/client/selector"
 	"github.com/micro/go-micro/codec"
 	"github.com/micro/go-micro/codec/jsonrpc"
 	"github.com/micro/go-micro/codec/protorpc"
 	"github.com/micro/go-micro/errors"
 	"github.com/micro/go-micro/registry"
-	"github.com/micro/go-micro/selector"
 	"github.com/micro/go-micro/util/ctx"
 )
 
@@ -120,32 +120,6 @@ func (h *rpcHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	var rsp []byte
 
 	switch {
-	// json codecs
-	case hasCodec(ct, jsonCodecs):
-		var request json.RawMessage
-		// if the extracted payload isn't empty lets use it
-		if len(br) > 0 {
-			request = json.RawMessage(br)
-		}
-
-		// create request/response
-		var response json.RawMessage
-
-		req := c.NewRequest(
-			service.Name,
-			service.Endpoint.Name,
-			&request,
-			client.WithContentType(ct),
-		)
-
-		// make the call
-		if err := c.Call(cx, req, &response, client.WithSelectOption(so)); err != nil {
-			writeError(w, r, err)
-			return
-		}
-
-		// marshall response
-		rsp, _ = response.MarshalJSON()
 	// proto codecs
 	case hasCodec(ct, protoCodecs):
 		request := &proto.Message{}
@@ -173,10 +147,38 @@ func (h *rpcHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		// marshall response
 		rsp, _ = response.Marshal()
 	default:
-		http.Error(w, "Unsupported Content-Type", 400)
+		// if json codec is not present set to json
+		if !hasCodec(ct, jsonCodecs) {
+			ct = "application/json"
+		}
+
+		// default to trying json
+		var request json.RawMessage
+		// if the extracted payload isn't empty lets use it
+		if len(br) > 0 {
+			request = json.RawMessage(br)
+		}
+
+		// create request/response
+		var response json.RawMessage
+
+		req := c.NewRequest(
+			service.Name,
+			service.Endpoint.Name,
+			&request,
+			client.WithContentType(ct),
+		)
+
+		// make the call
+		if err := c.Call(cx, req, &response, client.WithSelectOption(so)); err != nil {
+			writeError(w, r, err)
 			return
 		}
 
+		// marshall response
+		rsp, _ = response.MarshalJSON()
+	}
+
 	// write the response
 	writeResponse(w, r, rsp)
 }

api/handler/web/web.go

@@ -13,7 +13,7 @@ import (
 
 	"github.com/micro/go-micro/api"
 	"github.com/micro/go-micro/api/handler"
-	"github.com/micro/go-micro/selector"
+	"github.com/micro/go-micro/client/selector"
 )
 
 const (
@@ -79,7 +79,7 @@ func (wh *webHandler) getService(r *http.Request) (string, error) {
 		return "", nil
 	}
 
-	return fmt.Sprintf("http://%s:%d", s.Address, s.Port), nil
+	return fmt.Sprintf("http://%s", s.Address), nil
 }
 
 // serveWebSocket used to serve a web socket proxied connection

api/router/options.go

@@ -3,7 +3,7 @@ package router
 import (
 	"github.com/micro/go-micro/api/resolver"
 	"github.com/micro/go-micro/api/resolver/micro"
-	"github.com/micro/go-micro/cmd"
+	"github.com/micro/go-micro/config/cmd"
 	"github.com/micro/go-micro/registry"
 )
 

broker/broker.go

@@ -3,28 +3,28 @@ package broker
 
 // Broker is an interface used for asynchronous messaging.
 type Broker interface {
+	Init(...Option) error
 	Options() Options
 	Address() string
 	Connect() error
 	Disconnect() error
-	Init(...Option) error
+	Publish(topic string, m *Message, opts ...PublishOption) error
-	Publish(string, *Message, ...PublishOption) error
+	Subscribe(topic string, h Handler, opts ...SubscribeOption) (Subscriber, error)
-	Subscribe(string, Handler, ...SubscribeOption) (Subscriber, error)
 	String() string
 }
 
 // Handler is used to process messages via a subscription of a topic.
 // The handler is passed a publication interface which contains the
 // message and optional Ack method to acknowledge receipt of the message.
-type Handler func(Publication) error
+type Handler func(Event) error
 
 type Message struct {
 	Header map[string]string
 	Body   []byte
 }
 
-// Publication is given to a subscription handler for processing
+// Event is given to a subscription handler for processing
-type Publication interface {
+type Event interface {
 	Topic() string
 	Message() *Message
 	Ack() error

broker/common_test.go

@@ -14,13 +14,11 @@ var (
 				Nodes: []*registry.Node{
 					{
 						Id:      "foo-1.0.0-123",
-						Address: "localhost",
+						Address: "localhost:9999",
-						Port:    9999,
 					},
 					{
 						Id:      "foo-1.0.0-321",
-						Address: "localhost",
+						Address: "localhost:9999",
-						Port:    9999,
 					},
 				},
 			},
@@ -30,8 +28,7 @@ var (
 				Nodes: []*registry.Node{
 					{
 						Id:      "foo-1.0.1-321",
-						Address: "localhost",
+						Address: "localhost:6666",
-						Port:    6666,
 					},
 				},
 			},
@@ -41,8 +38,7 @@ var (
 				Nodes: []*registry.Node{
 					{
 						Id:      "foo-1.0.3-345",
-						Address: "localhost",
+						Address: "localhost:8888",
-						Port:    8888,
 					},
 				},
 			},

broker/http_broker.go

@@ -13,8 +13,6 @@ import (
 	"net/http"
 	"net/url"
 	"runtime"
-	"strconv"
-	"strings"
 	"sync"
 	"time"
 
@@ -59,7 +57,7 @@ type httpSubscriber struct {
 	hb    *httpBroker
 }
 
-type httpPublication struct {
+type httpEvent struct {
 	m *Message
 	t string
 }
@@ -155,15 +153,15 @@ func newHttpBroker(opts ...Option) Broker {
 	return h
 }
 
-func (h *httpPublication) Ack() error {
+func (h *httpEvent) Ack() error {
 	return nil
 }
 
-func (h *httpPublication) Message() *Message {
+func (h *httpEvent) Message() *Message {
 	return h.m
 }
 
-func (h *httpPublication) Topic() string {
+func (h *httpEvent) Topic() string {
 	return h.t
 }
 
@@ -323,7 +321,7 @@ func (h *httpBroker) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 		return
 	}
 
-	p := &httpPublication{m: m, t: topic}
+	p := &httpEvent{m: m, t: topic}
 	id := req.Form.Get("id")
 
 	h.RLock()
@@ -403,6 +401,7 @@ func (h *httpBroker) Connect() error {
 	go func() {
 		h.run(l)
 		h.Lock()
+		h.opts.Addrs = []string{addr}
 		h.address = addr
 		h.Unlock()
 	}()
@@ -542,7 +541,7 @@ func (h *httpBroker) Publish(topic string, msg *Message, opts ...PublishOption)
 		vals := url.Values{}
 		vals.Add("id", node.Id)
 
-		uri := fmt.Sprintf("%s://%s:%d%s?%s", scheme, node.Address, node.Port, DefaultSubPath, vals.Encode())
+		uri := fmt.Sprintf("%s://%s%s?%s", scheme, node.Address, DefaultSubPath, vals.Encode())
 		r, err := h.c.Post(uri, "application/json", bytes.NewReader(b))
 		if err != nil {
 			return err
@@ -613,12 +612,15 @@ func (h *httpBroker) Publish(topic string, msg *Message, opts ...PublishOption)
 }
 
 func (h *httpBroker) Subscribe(topic string, handler Handler, opts ...SubscribeOption) (Subscriber, error) {
+	var err error
+	var host, port string
 	options := NewSubscribeOptions(opts...)
 
 	// parse address for host, port
-	parts := strings.Split(h.Address(), ":")
+	host, port, err = net.SplitHostPort(h.Address())
-	host := strings.Join(parts[:len(parts)-1], ":")
+	if err != nil {
-	port, _ := strconv.Atoi(parts[len(parts)-1])
+		return nil, err
+	}
 
 	addr, err := maddr.Extract(host)
 	if err != nil {
@@ -637,8 +639,7 @@ func (h *httpBroker) Subscribe(topic string, handler Handler, opts ...SubscribeO
 	// register service
 	node := &registry.Node{
 		Id:      id,
-		Address: addr,
+		Address: mnet.HostPort(addr, port),
-		Port:    port,
 		Metadata: map[string]string{
 			"secure": fmt.Sprintf("%t", secure),
 		},

broker/http_broker_test.go

@@ -47,7 +47,7 @@ func sub(be *testing.B, c int) {
 	done := make(chan bool, c)
 
 	for i := 0; i < c; i++ {
-		sub, err := b.Subscribe(topic, func(p Publication) error {
+		sub, err := b.Subscribe(topic, func(p Event) error {
 			done <- true
 			m := p.Message()
 
@@ -107,7 +107,7 @@ func pub(be *testing.B, c int) {
 
 	done := make(chan bool, c*4)
 
-	sub, err := b.Subscribe(topic, func(p Publication) error {
+	sub, err := b.Subscribe(topic, func(p Event) error {
 		done <- true
 		m := p.Message()
 		if string(m.Body) != string(msg.Body) {
@@ -175,7 +175,7 @@ func TestBroker(t *testing.T) {
 
 	done := make(chan bool)
 
-	sub, err := b.Subscribe("test", func(p Publication) error {
+	sub, err := b.Subscribe("test", func(p Event) error {
 		m := p.Message()
 
 		if string(m.Body) != string(msg.Body) {
@@ -224,7 +224,7 @@ func TestConcurrentSubBroker(t *testing.T) {
 	var wg sync.WaitGroup
 
 	for i := 0; i < 10; i++ {
-		sub, err := b.Subscribe("test", func(p Publication) error {
+		sub, err := b.Subscribe("test", func(p Event) error {
 			defer wg.Done()
 
 			m := p.Message()
@@ -279,7 +279,7 @@ func TestConcurrentPubBroker(t *testing.T) {
 
 	var wg sync.WaitGroup
 
-	sub, err := b.Subscribe("test", func(p Publication) error {
+	sub, err := b.Subscribe("test", func(p Event) error {
 		defer wg.Done()
 
 		m := p.Message()

broker/memory/memory.go

@@ -3,21 +3,26 @@ package memory
 
 import (
 	"errors"
+	"math/rand"
 	"sync"
+	"time"
 
 	"github.com/google/uuid"
 	"github.com/micro/go-micro/broker"
+	maddr "github.com/micro/go-micro/util/addr"
+	mnet "github.com/micro/go-micro/util/net"
 )
 
 type memoryBroker struct {
 	opts broker.Options
 
+	addr string
 	sync.RWMutex
 	connected   bool
 	Subscribers map[string][]*memorySubscriber
 }
 
-type memoryPublication struct {
+type memoryEvent struct {
 	topic   string
 	message *broker.Message
 }
@@ -35,7 +40,7 @@ func (m *memoryBroker) Options() broker.Options {
 }
 
 func (m *memoryBroker) Address() string {
-	return ""
+	return m.addr
 }
 
 func (m *memoryBroker) Connect() error {
@@ -46,6 +51,15 @@ func (m *memoryBroker) Connect() error {
 		return nil
 	}
 
+	addr, err := maddr.Extract("::")
+	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
@@ -72,19 +86,19 @@ func (m *memoryBroker) Init(opts ...broker.Option) error {
 }
 
 func (m *memoryBroker) Publish(topic string, message *broker.Message, opts ...broker.PublishOption) error {
-	m.Lock()
+	m.RLock()
-	defer m.Unlock()
-
 	if !m.connected {
+		m.RUnlock()
 		return errors.New("not connected")
 	}
 
 	subs, ok := m.Subscribers[topic]
+	m.RUnlock()
 	if !ok {
 		return nil
 	}
 
-	p := &memoryPublication{
+	p := &memoryEvent{
 		topic:   topic,
 		message: message,
 	}
@@ -99,12 +113,12 @@ func (m *memoryBroker) Publish(topic string, message *broker.Message, opts ...br
 }
 
 func (m *memoryBroker) Subscribe(topic string, handler broker.Handler, opts ...broker.SubscribeOption) (broker.Subscriber, error) {
-	m.Lock()
+	m.RLock()
-	defer m.Unlock()
-
 	if !m.connected {
+		m.RUnlock()
 		return nil, errors.New("not connected")
 	}
+	m.RUnlock()
 
 	var options broker.SubscribeOptions
 	for _, o := range opts {
@@ -119,7 +133,9 @@ func (m *memoryBroker) Subscribe(topic string, handler broker.Handler, opts ...b
 		opts:    options,
 	}
 
+	m.Lock()
 	m.Subscribers[topic] = append(m.Subscribers[topic], sub)
+	m.Unlock()
 
 	go func() {
 		<-sub.exit
@@ -142,15 +158,15 @@ func (m *memoryBroker) String() string {
 	return "memory"
 }
 
-func (m *memoryPublication) Topic() string {
+func (m *memoryEvent) Topic() string {
 	return m.topic
 }
 
-func (m *memoryPublication) Message() *broker.Message {
+func (m *memoryEvent) Message() *broker.Message {
 	return m.message
 }
 
-func (m *memoryPublication) Ack() error {
+func (m *memoryEvent) Ack() error {
 	return nil
 }
 
@@ -169,6 +185,7 @@ func (m *memorySubscriber) Unsubscribe() error {
 
 func NewBroker(opts ...broker.Option) broker.Broker {
 	var options broker.Options
+	rand.Seed(time.Now().UnixNano())
 	for _, o := range opts {
 		o(&options)
 	}

broker/memory/memory_test.go

@@ -17,7 +17,7 @@ func TestMemoryBroker(t *testing.T) {
 	topic := "test"
 	count := 10
 
-	fn := func(p broker.Publication) error {
+	fn := func(p broker.Event) error {
 		return nil
 	}
 

broker/nats/nats.go

@@ -13,18 +13,19 @@ import (
 )
 
 type natsBroker struct {
+	sync.Once
 	sync.RWMutex
 	addrs   []string
 	conn    *nats.Conn
 	opts    broker.Options
 	nopts   nats.Options
 	drain   bool
+	closeCh chan (error)
 }
 
 type subscriber struct {
 	s    *nats.Subscription
 	opts broker.SubscribeOptions
-	drain bool
 }
 
 type publication struct {
@@ -54,9 +55,6 @@ func (s *subscriber) Topic() string {
 }
 
 func (s *subscriber) Unsubscribe() error {
-	if s.drain {
-		return s.s.Drain()
-	}
 	return s.s.Unsubscribe()
 }
 
@@ -122,20 +120,17 @@ func (n *natsBroker) Connect() error {
 
 func (n *natsBroker) Disconnect() error {
 	n.RLock()
+	defer n.RUnlock()
 	if n.drain {
 		n.conn.Drain()
-	} else {
+		return <-n.closeCh
-		n.conn.Close()
 	}
-	n.RUnlock()
+	n.conn.Close()
 	return nil
 }
 
 func (n *natsBroker) Init(opts ...broker.Option) error {
-	for _, o := range opts {
+	n.setOption(opts...)
-		o(&n.opts)
-	}
-	n.addrs = setAddrs(n.opts.Addrs)
 	return nil
 }
 
@@ -167,11 +162,6 @@ func (n *natsBroker) Subscribe(topic string, handler broker.Handler, opts ...bro
 		o(&opt)
 	}
 
-	var drain bool
-	if _, ok := opt.Context.Value(drainSubscriptionKey{}).(bool); ok {
-		drain = true
-	}
-
 	fn := func(msg *nats.Msg) {
 		var m broker.Message
 		if err := n.opts.Codec.Unmarshal(msg.Data, &m); err != nil {
@@ -193,7 +183,7 @@ func (n *natsBroker) Subscribe(topic string, handler broker.Handler, opts ...bro
 	if err != nil {
 		return nil, err
 	}
-	return &subscriber{s: sub, opts: opt, drain: drain}, nil
+	return &subscriber{s: sub, opts: opt}, nil
 }
 
 func (n *natsBroker) String() string {
@@ -207,39 +197,59 @@ func NewBroker(opts ...broker.Option) broker.Broker {
 		Context: context.Background(),
 	}
 
+	n := &natsBroker{
+		opts: options,
+	}
+	n.setOption(opts...)
+
+	return n
+}
+
+func (n *natsBroker) setOption(opts ...broker.Option) {
 	for _, o := range opts {
-		o(&options)
+		o(&n.opts)
 	}
 
-	natsOpts := nats.GetDefaultOptions()
+	n.Once.Do(func() {
-	if n, ok := options.Context.Value(optionsKey{}).(nats.Options); ok {
+		n.nopts = nats.GetDefaultOptions()
-		natsOpts = n
+	})
-	}
 
-	var drain bool
+	if nopts, ok := n.opts.Context.Value(optionsKey{}).(nats.Options); ok {
-	if _, ok := options.Context.Value(drainSubscriptionKey{}).(bool); ok {
+		n.nopts = nopts
-		drain = true
 	}
 
 	// 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(options.Addrs) == 0 {
+	if len(n.opts.Addrs) == 0 {
-		options.Addrs = natsOpts.Servers
+		n.opts.Addrs = n.nopts.Servers
 	}
 
-	if !options.Secure {
+	if !n.opts.Secure {
-		options.Secure = natsOpts.Secure
+		n.opts.Secure = n.nopts.Secure
 	}
 
-	if options.TLSConfig == nil {
+	if n.opts.TLSConfig == nil {
-		options.TLSConfig = natsOpts.TLSConfig
+		n.opts.TLSConfig = n.nopts.TLSConfig
+	}
+	n.addrs = 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
+	}
 }
 
-	return &natsBroker{
+func (n *natsBroker) onClose(conn *nats.Conn) {
-		opts:  options,
+	n.closeCh <- nil
-		nopts: natsOpts,
+}
-		addrs: setAddrs(options.Addrs),
+
-		drain: drain,
+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
 	}
 }

broker/nats/options.go

@@ -7,7 +7,6 @@ import (
 
 type optionsKey struct{}
 type drainConnectionKey struct{}
-type drainSubscriptionKey struct{}
 
 // Options accepts nats.Options
 func Options(opts nats.Options) broker.Option {
@@ -16,10 +15,5 @@ func Options(opts nats.Options) broker.Option {
 
 // DrainConnection will drain subscription on close
 func DrainConnection() broker.Option {
-	return setBrokerOption(drainConnectionKey{}, true)
+	return setBrokerOption(drainConnectionKey{}, struct{}{})
-}
-
-// DrainSubscription will drain pending messages when unsubscribe
-func DrainSubscription() broker.SubscribeOption {
-	return setSubscribeOption(drainSubscriptionKey{}, true)
 }

client/buffer.go

@@ -1,14 +0,0 @@
-package client
-
-import (
-	"bytes"
-)
-
-type buffer struct {
-	*bytes.Buffer
-}
-
-func (b *buffer) Close() error {
-	b.Buffer.Reset()
-	return nil
-}

client/client.go

@@ -10,7 +10,7 @@ import (
 
 // Client is the interface used to make requests to services.
 // It supports Request/Response via Transport and Publishing via the Broker.
-// It also supports bidiectional streaming of requests.
+// It also supports bidirectional streaming of requests.
 type Client interface {
 	Init(...Option) error
 	Options() Options

client/common_test.go

@@ -14,13 +14,11 @@ var (
 				Nodes: []*registry.Node{
 					{
 						Id:      "foo-1.0.0-123",
-						Address: "localhost",
+						Address: "localhost:9999",
-						Port:    9999,
 					},
 					{
 						Id:      "foo-1.0.0-321",
-						Address: "localhost",
+						Address: "localhost:9999",
-						Port:    9999,
 					},
 				},
 			},
@@ -30,8 +28,7 @@ var (
 				Nodes: []*registry.Node{
 					{
 						Id:      "foo-1.0.1-321",
-						Address: "localhost",
+						Address: "localhost:6666",
-						Port:    6666,
 					},
 				},
 			},
@@ -41,8 +38,7 @@ var (
 				Nodes: []*registry.Node{
 					{
 						Id:      "foo-1.0.3-345",
-						Address: "localhost",
+						Address: "localhost:8888",
-						Port:    8888,
 					},
 				},
 			},

client/grpc/buffer.go

@@ -1,14 +0,0 @@
-package grpc
-
-import (
-	"bytes"
-)
-
-type buffer struct {
-	*bytes.Buffer
-}
-
-func (b *buffer) Close() error {
-	b.Buffer.Reset()
-	return nil
-}

client/grpc/codec.go

@@ -2,12 +2,18 @@ package grpc
 
 import (
 	"fmt"
+	"strings"
 
+	b "bytes"
+
+	"github.com/golang/protobuf/jsonpb"
 	"github.com/golang/protobuf/proto"
-	"github.com/json-iterator/go"
+	jsoniter "github.com/json-iterator/go"
 	"github.com/micro/go-micro/codec"
+	"github.com/micro/go-micro/codec/bytes"
 	"github.com/micro/go-micro/codec/jsonrpc"
 	"github.com/micro/go-micro/codec/protorpc"
+	"google.golang.org/grpc"
 	"google.golang.org/grpc/encoding"
 )
 
@@ -16,6 +22,8 @@ type protoCodec struct{}
 type bytesCodec struct{}
 type wrapCodec struct{ encoding.Codec }
 
+var jsonpbMarshaler = &jsonpb.Marshaler{}
+
 var (
 	defaultGRPCCodecs = map[string]encoding.Codec{
 		"application/json":         jsonCodec{},
@@ -52,7 +60,28 @@ 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) {
+	b, ok := v.(*bytes.Frame)
+	if ok {
+		return b.Data, nil
+	}
 	return proto.Marshal(v.(proto.Message))
 }
 
@@ -86,13 +115,79 @@ func (bytesCodec) Name() string {
 }
 
 func (jsonCodec) Marshal(v interface{}) ([]byte, error) {
+	if pb, ok := v.(proto.Message); ok {
+		s, err := jsonpbMarshaler.MarshalToString(pb)
+
+		return []byte(s), err
+	}
+
 	return json.Marshal(v)
 }
 
 func (jsonCodec) Unmarshal(data []byte, v interface{}) error {
+	if pb, ok := v.(proto.Message); ok {
+		return jsonpb.Unmarshal(b.NewReader(data), pb)
+	}
+
 	return json.Unmarshal(data, 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)
+	}
+	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{m.Body})
+}
+
+func (g *grpcCodec) Close() error {
+	return g.s.CloseSend()
+}
+
+func (g *grpcCodec) String() string {
+	return g.c.Name()
+}

client/grpc/grpc.go

@@ -2,7 +2,6 @@
 package grpc
 
 import (
-	"bytes"
 	"context"
 	"crypto/tls"
 	"fmt"
@@ -12,13 +11,14 @@ import (
 
 	"github.com/micro/go-micro/broker"
 	"github.com/micro/go-micro/client"
+	"github.com/micro/go-micro/client/selector"
 	"github.com/micro/go-micro/codec"
 	"github.com/micro/go-micro/errors"
 	"github.com/micro/go-micro/metadata"
 	"github.com/micro/go-micro/registry"
-	"github.com/micro/go-micro/selector"
 	"github.com/micro/go-micro/transport"
 
+	"github.com/micro/go-micro/util/buf"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials"
 	"google.golang.org/grpc/encoding"
@@ -32,8 +32,9 @@ type grpcClient struct {
 }
 
 func init() {
-	encoding.RegisterCodec(jsonCodec{})
+	encoding.RegisterCodec(wrapCodec{jsonCodec{}})
-	encoding.RegisterCodec(bytesCodec{})
+	encoding.RegisterCodec(wrapCodec{protoCodec{}})
+	encoding.RegisterCodec(wrapCodec{bytesCodec{}})
 }
 
 // secure returns the dial option for whether its a secure or insecure connection
@@ -58,14 +59,14 @@ func (g *grpcClient) next(request client.Request, opts client.CallOptions) (sele
 
 	// get proxy address
 	if prx := os.Getenv("MICRO_PROXY_ADDRESS"); len(prx) > 0 {
-		opts.Address = prx
+		opts.Address = []string{prx}
 	}
 
 	// return remote address
 	if len(opts.Address) > 0 {
 		return func() (*registry.Node, error) {
 			return &registry.Node{
-				Address: opts.Address,
+				Address: opts.Address[0],
 			}, nil
 		}, nil
 	}
@@ -83,9 +84,6 @@ func (g *grpcClient) next(request client.Request, opts client.CallOptions) (sele
 
 func (g *grpcClient) call(ctx context.Context, node *registry.Node, req client.Request, rsp interface{}, opts client.CallOptions) error {
 	address := node.Address
-	if node.Port > 0 {
-		address = fmt.Sprintf("%s:%d", address, node.Port)
-	}
 
 	header := make(map[string]string)
 	if md, ok := metadata.FromContext(ctx); ok {
@@ -129,7 +127,7 @@ func (g *grpcClient) call(ctx context.Context, node *registry.Node, req client.R
 	ch := make(chan error, 1)
 
 	go func() {
-		err := cc.Invoke(ctx, methodToGRPC(req.Endpoint(), req.Body()), req.Body(), rsp, grpc.ForceCodec(cf))
+		err := cc.Invoke(ctx, methodToGRPC(req.Service(), req.Endpoint()), req.Body(), rsp, grpc.CallContentSubtype(cf.Name()))
 		ch <- microError(err)
 	}()
 
@@ -145,9 +143,6 @@ func (g *grpcClient) call(ctx context.Context, node *registry.Node, req client.R
 
 func (g *grpcClient) stream(ctx context.Context, node *registry.Node, req client.Request, opts client.CallOptions) (client.Stream, error) {
 	address := node.Address
-	if node.Port > 0 {
-		address = fmt.Sprintf("%s:%d", address, node.Port)
-	}
 
 	header := make(map[string]string)
 	if md, ok := metadata.FromContext(ctx); ok {
@@ -177,7 +172,10 @@ func (g *grpcClient) stream(ctx context.Context, node *registry.Node, req client
 		dialCtx, cancel = context.WithCancel(ctx)
 	}
 	defer cancel()
-	cc, err := grpc.DialContext(dialCtx, address, grpc.WithDefaultCallOptions(grpc.ForceCodec(cf)), g.secure())
+
+	wc := wrapCodec{cf}
+
+	cc, err := grpc.DialContext(dialCtx, address, grpc.WithDefaultCallOptions(grpc.ForceCodec(wc)), g.secure())
 	if err != nil {
 		return nil, errors.InternalServerError("go.micro.client", fmt.Sprintf("Error sending request: %v", err))
 	}
@@ -188,15 +186,26 @@ func (g *grpcClient) stream(ctx context.Context, node *registry.Node, req client
 		ServerStreams: true,
 	}
 
-	st, err := cc.NewStream(ctx, desc, methodToGRPC(req.Endpoint(), req.Body()))
+	st, err := cc.NewStream(ctx, desc, methodToGRPC(req.Service(), req.Endpoint()))
 	if err != nil {
 		return nil, 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
+	}
+
 	rsp := &response{
 		conn:   cc,
 		stream: st,
 		codec:  cf,
+		gcodec: codec,
 	}
 
 	return &grpcStream{
@@ -280,7 +289,7 @@ func (g *grpcClient) Options() client.Options {
 }
 
 func (g *grpcClient) NewMessage(topic string, msg interface{}, opts ...client.MessageOption) client.Message {
-	return newGRPCPublication(topic, msg, "application/octet-stream")
+	return newGRPCEvent(topic, msg, g.opts.ContentType, opts...)
 }
 
 func (g *grpcClient) NewRequest(service, method string, req interface{}, reqOpts ...client.RequestOption) client.Request {
@@ -357,9 +366,9 @@ func (g *grpcClient) Call(ctx context.Context, req client.Request, rsp interface
 	var gerr error
 
 	for i := 0; i <= callOpts.Retries; i++ {
-		go func() {
+		go func(i int) {
 			ch <- call(i)
-		}()
+		}(i)
 
 		select {
 		case <-ctx.Done():
@@ -440,10 +449,10 @@ func (g *grpcClient) Stream(ctx context.Context, req client.Request, opts ...cli
 	var grr error
 
 	for i := 0; i <= callOpts.Retries; i++ {
-		go func() {
+		go func(i int) {
 			s, err := call(i)
 			ch <- response{s, err}
-		}()
+		}(i)
 
 		select {
 		case <-ctx.Done():
@@ -482,8 +491,9 @@ func (g *grpcClient) Publish(ctx context.Context, p client.Message, opts ...clie
 		return errors.InternalServerError("go.micro.client", err.Error())
 	}
 
-	b := &buffer{bytes.NewBuffer(nil)}
+	b := buf.New(nil)
-	if err := cf(b).Write(&codec.Message{Type: codec.Publication}, p.Payload()); err != nil {
+
+	if err := cf(b).Write(&codec.Message{Type: codec.Event}, p.Payload()); err != nil {
 		return errors.InternalServerError("go.micro.client", err.Error())
 	}
 

client/grpc/grpc_test.go

@@ -3,14 +3,12 @@ package grpc
 import (
 	"context"
 	"net"
-	"strconv"
-	"strings"
 	"testing"
 
 	"github.com/micro/go-micro/client"
+	"github.com/micro/go-micro/client/selector"
 	"github.com/micro/go-micro/registry"
 	"github.com/micro/go-micro/registry/memory"
-	"github.com/micro/go-micro/selector"
 	pgrpc "google.golang.org/grpc"
 	pb "google.golang.org/grpc/examples/helloworld/helloworld"
 )
@@ -36,22 +34,17 @@ func TestGRPCClient(t *testing.T) {
 	go s.Serve(l)
 	defer s.Stop()
 
-	parts := strings.Split(l.Addr().String(), ":")
-	port, _ := strconv.Atoi(parts[len(parts)-1])
-	addr := strings.Join(parts[:len(parts)-1], ":")
-
 	// create mock registry
 	r := memory.NewRegistry()
 
 	// register service
 	r.Register(&registry.Service{
-		Name:    "test",
+		Name:    "helloworld",
 		Version: "test",
 		Nodes: []*registry.Node{
 			&registry.Node{
 				Id:      "test-1",
-				Address: addr,
+				Address: l.Addr().String(),
-				Port:    port,
 			},
 		},
 	})
@@ -73,7 +66,7 @@ func TestGRPCClient(t *testing.T) {
 	}
 
 	for _, method := range testMethods {
-		req := c.NewRequest("test", method, &pb.HelloRequest{
+		req := c.NewRequest("helloworld", method, &pb.HelloRequest{
 			Name: "John",
 		})
 

client/grpc/message.go

@@ -4,13 +4,13 @@ import (
 	"github.com/micro/go-micro/client"
 )
 
-type grpcPublication struct {
+type grpcEvent struct {
 	topic       string
 	contentType string
 	payload     interface{}
 }
 
-func newGRPCPublication(topic string, payload interface{}, contentType string, opts ...client.MessageOption) client.Message {
+func newGRPCEvent(topic string, payload interface{}, contentType string, opts ...client.MessageOption) client.Message {
 	var options client.MessageOptions
 	for _, o := range opts {
 		o(&options)
@@ -20,21 +20,21 @@ func newGRPCPublication(topic string, payload interface{}, contentType string, o
 		contentType = options.ContentType
 	}
 
-	return &grpcPublication{
+	return &grpcEvent{
 		payload:     payload,
 		topic:       topic,
 		contentType: contentType,
 	}
 }
 
-func (g *grpcPublication) ContentType() string {
+func (g *grpcEvent) ContentType() string {
 	return g.contentType
 }
 
-func (g *grpcPublication) Topic() string {
+func (g *grpcEvent) Topic() string {
 	return g.topic
 }
 
-func (g *grpcPublication) Payload() interface{} {
+func (g *grpcEvent) Payload() interface{} {
 	return g.payload
 }

client/grpc/request.go

@@ -2,7 +2,6 @@ package grpc
 
 import (
 	"fmt"
-	"reflect"
 	"strings"
 
 	"github.com/micro/go-micro/client"
@@ -18,30 +17,25 @@ type grpcRequest struct {
 	codec       codec.Codec
 }
 
-func methodToGRPC(method string, request interface{}) string {
+// 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
 	}
-	// can't operate on nil request
+
-	t := reflect.TypeOf(request)
-	if t == nil {
-		return method
-	}
-	// dereference
-	if t.Kind() == reflect.Ptr {
-		t = t.Elem()
-	}
-	// get package name
-	pParts := strings.Split(t.PkgPath(), "/")
-	pkg := pParts[len(pParts)-1]
 	// 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", pkg, mParts[0], mParts[1])
+	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 {

client/grpc/request_test.go

@@ -2,45 +2,38 @@ package grpc
 
 import (
 	"testing"
-
-	pb "google.golang.org/grpc/examples/helloworld/helloworld"
 )
 
 func TestMethodToGRPC(t *testing.T) {
 	testData := []struct {
+		service string
 		method  string
 		expect  string
-		request interface{}
 	}{
 		{
+			"helloworld",
 			"Greeter.SayHello",
 			"/helloworld.Greeter/SayHello",
-			new(pb.HelloRequest),
 		},
 		{
+			"helloworld",
 			"/helloworld.Greeter/SayHello",
 			"/helloworld.Greeter/SayHello",
-			new(pb.HelloRequest),
 		},
 		{
+			"",
+			"/helloworld.Greeter/SayHello",
+			"/helloworld.Greeter/SayHello",
+		},
+		{
+			"",
 			"Greeter.SayHello",
-			"/helloworld.Greeter/SayHello",
+			"/Greeter/SayHello",
-			pb.HelloRequest{},
-		},
-		{
-			"/helloworld.Greeter/SayHello",
-			"/helloworld.Greeter/SayHello",
-			pb.HelloRequest{},
-		},
-		{
-			"Greeter.SayHello",
-			"Greeter.SayHello",
-			nil,
 		},
 	}
 
 	for _, d := range testData {
-		method := methodToGRPC(d.method, d.request)
+		method := methodToGRPC(d.service, d.method)
 		if method != d.expect {
 			t.Fatalf("expected %s got %s", d.expect, method)
 		}

client/grpc/response.go

@@ -4,6 +4,7 @@ import (
 	"strings"
 
 	"github.com/micro/go-micro/codec"
+	"github.com/micro/go-micro/codec/bytes"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/encoding"
 )
@@ -12,11 +13,12 @@ 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 nil
+	return r.gcodec
 }
 
 // read the header
@@ -34,5 +36,9 @@ func (r *response) Header() map[string]string {
 
 // Read the undecoded response
 func (r *response) Read() ([]byte, error) {
-	return nil, nil
+	f := &bytes.Frame{}
+	if err := r.gcodec.ReadBody(f); err != nil {
+		return nil, err
+	}
+	return f.Data, nil
 }

client/options.go

@@ -5,9 +5,9 @@ import (
 	"time"
 
 	"github.com/micro/go-micro/broker"
+	"github.com/micro/go-micro/client/selector"
 	"github.com/micro/go-micro/codec"
 	"github.com/micro/go-micro/registry"
-	"github.com/micro/go-micro/selector"
 	"github.com/micro/go-micro/transport"
 )
 
@@ -43,8 +43,8 @@ type Options struct {
 type CallOptions struct {
 	SelectOptions []selector.SelectOption
 
-	// Address of remote host
+	// Address of remote hosts
-	Address string
+	Address []string
 	// Backoff func
 	Backoff BackoffFunc
 	// Check if retriable func
@@ -245,8 +245,8 @@ func WithExchange(e string) PublishOption {
 	}
 }
 
-// WithAddress sets the remote address to use rather than using service discovery
+// WithAddress sets the remote addresses to use rather than using service discovery
-func WithAddress(a string) CallOption {
+func WithAddress(a ...string) CallOption {
 	return func(o *CallOptions) {
 		o.Address = a
 	}

client/pool/default.go

@@ -0,0 +1,114 @@
+package pool
+
+import (
+	"sync"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/micro/go-micro/transport"
+)
+
+type pool struct {
+	size int
+	ttl  time.Duration
+	tr   transport.Transport
+
+	sync.Mutex
+	conns map[string][]*poolConn
+}
+
+type poolConn struct {
+	transport.Client
+	id      string
+	created time.Time
+}
+
+func newPool(options Options) *pool {
+	return &pool{
+		size:  options.Size,
+		tr:    options.Transport,
+		ttl:   options.TTL,
+		conns: make(map[string][]*poolConn),
+	}
+}
+
+func (p *pool) Close() error {
+	p.Lock()
+	for k, c := range p.conns {
+		for _, conn := range c {
+			conn.Client.Close()
+		}
+		delete(p.conns, k)
+	}
+	p.Unlock()
+	return nil
+}
+
+// NoOp the Close since we manage it
+func (p *poolConn) Close() error {
+	return nil
+}
+
+func (p *poolConn) Id() string {
+	return p.id
+}
+
+func (p *poolConn) Created() time.Time {
+	return p.created
+}
+
+func (p *pool) Get(addr string, opts ...transport.DialOption) (Conn, error) {
+	p.Lock()
+	conns := p.conns[addr]
+
+	// while we have conns check age and then return one
+	// otherwise we'll create a new conn
+	for len(conns) > 0 {
+		conn := conns[len(conns)-1]
+		conns = conns[:len(conns)-1]
+		p.conns[addr] = conns
+
+		// if conn is old kill it and move on
+		if d := time.Since(conn.Created()); d > p.ttl {
+			conn.Client.Close()
+			continue
+		}
+
+		// we got a good conn, lets unlock and return it
+		p.Unlock()
+
+		return conn, nil
+	}
+
+	p.Unlock()
+
+	// create new conn
+	c, err := p.tr.Dial(addr, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return &poolConn{
+		Client:  c,
+		id:      uuid.New().String(),
+		created: time.Now(),
+	}, nil
+}
+
+func (p *pool) Release(conn Conn, err error) error {
+	// don't store the conn if it has errored
+	if err != nil {
+		return conn.(*poolConn).Client.Close()
+	}
+
+	// otherwise put it back for reuse
+	p.Lock()
+	conns := p.conns[conn.Remote()]
+	if len(conns) >= p.size {
+		p.Unlock()
+		return conn.(*poolConn).Client.Close()
+	}
+	p.conns[conn.Remote()] = append(conns, conn.(*poolConn))
+	p.Unlock()
+
+	return nil
+}

client/pool/default_test.go

@@ -1,4 +1,4 @@
-package client
+package pool
 
 import (
 	"testing"
@@ -9,12 +9,17 @@ import (
 )
 
 func testPool(t *testing.T, size int, ttl time.Duration) {
-	// zero pool
-	p := newPool(size, ttl)
-
 	// mock transport
 	tr := memory.NewTransport()
 
+	options := Options{
+		TTL:       ttl,
+		Size:      size,
+		Transport: tr,
+	}
+	// zero pool
+	p := newPool(options)
+
 	// listen
 	l, err := tr.Listen(":0")
 	if err != nil {
@@ -43,7 +48,7 @@ func testPool(t *testing.T, size int, ttl time.Duration) {
 
 	for i := 0; i < 10; i++ {
 		// get a conn
-		c, err := p.getConn(l.Addr(), tr)
+		c, err := p.Get(l.Addr())
 		if err != nil {
 			t.Fatal(err)
 		}
@@ -67,7 +72,7 @@ func testPool(t *testing.T, size int, ttl time.Duration) {
 		}
 
 		// release the conn
-		p.release(l.Addr(), c, nil)
+		p.Release(c, nil)
 
 		p.Lock()
 		if i := len(p.conns[l.Addr()]); i > size {
@@ -78,7 +83,7 @@ func testPool(t *testing.T, size int, ttl time.Duration) {
 	}
 }
 
-func TestRPCPool(t *testing.T) {
+func TestClientPool(t *testing.T) {
 	testPool(t, 0, time.Minute)
 	testPool(t, 2, time.Minute)
 }

client/pool/options.go

@@ -0,0 +1,33 @@
+package pool
+
+import (
+	"time"
+
+	"github.com/micro/go-micro/transport"
+)
+
+type Options struct {
+	Transport transport.Transport
+	TTL       time.Duration
+	Size      int
+}
+
+type Option func(*Options)
+
+func Size(i int) Option {
+	return func(o *Options) {
+		o.Size = i
+	}
+}
+
+func Transport(t transport.Transport) Option {
+	return func(o *Options) {
+		o.Transport = t
+	}
+}
+
+func TTL(t time.Duration) Option {
+	return func(o *Options) {
+		o.TTL = t
+	}
+}

client/pool/pool.go

@@ -0,0 +1,35 @@
+// Package pool is a connection pool
+package pool
+
+import (
+	"time"
+
+	"github.com/micro/go-micro/transport"
+)
+
+// Pool is an interface for connection pooling
+type Pool interface {
+	// Close the pool
+	Close() error
+	// Get a connection
+	Get(addr string, opts ...transport.DialOption) (Conn, error)
+	// Releaes the connection
+	Release(c Conn, status error) error
+}
+
+type Conn interface {
+	// unique id of connection
+	Id() string
+	// time it was created
+	Created() time.Time
+	// embedded connection
+	transport.Client
+}
+
+func NewPool(opts ...Option) Pool {
+	var options Options
+	for _, o := range opts {
+		o(&options)
+	}
+	return newPool(options)
+}

client/proto/client.micro.go

@@ -0,0 +1,203 @@
+// Code generated by protoc-gen-micro. DO NOT EDIT.
+// source: micro/go-micro/client/proto/client.proto
+
+package go_micro_client
+
+import (
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	math "math"
+)
+
+import (
+	context "context"
+	client "github.com/micro/go-micro/client"
+	server "github.com/micro/go-micro/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 _ context.Context
+var _ client.Option
+var _ server.Option
+
+// Client API for Micro service
+
+type MicroService 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) (Micro_StreamService, error)
+	// Publish publishes a message and returns an empty Message
+	Publish(ctx context.Context, in *Message, opts ...client.CallOption) (*Message, error)
+}
+
+type microService struct {
+	c    client.Client
+	name string
+}
+
+func NewMicroService(name string, c client.Client) MicroService {
+	if c == nil {
+		c = client.NewClient()
+	}
+	if len(name) == 0 {
+		name = "go.micro.client"
+	}
+	return &microService{
+		c:    c,
+		name: name,
+	}
+}
+
+func (c *microService) Call(ctx context.Context, in *Request, opts ...client.CallOption) (*Response, error) {
+	req := c.c.NewRequest(c.name, "Micro.Call", in)
+	out := new(Response)
+	err := c.c.Call(ctx, req, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *microService) Stream(ctx context.Context, opts ...client.CallOption) (Micro_StreamService, error) {
+	req := c.c.NewRequest(c.name, "Micro.Stream", &Request{})
+	stream, err := c.c.Stream(ctx, req, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return &microServiceStream{stream}, nil
+}
+
+type Micro_StreamService interface {
+	SendMsg(interface{}) error
+	RecvMsg(interface{}) error
+	Close() error
+	Send(*Request) error
+	Recv() (*Response, error)
+}
+
+type microServiceStream struct {
+	stream client.Stream
+}
+
+func (x *microServiceStream) Close() error {
+	return x.stream.Close()
+}
+
+func (x *microServiceStream) SendMsg(m interface{}) error {
+	return x.stream.Send(m)
+}
+
+func (x *microServiceStream) RecvMsg(m interface{}) error {
+	return x.stream.Recv(m)
+}
+
+func (x *microServiceStream) Send(m *Request) error {
+	return x.stream.Send(m)
+}
+
+func (x *microServiceStream) Recv() (*Response, error) {
+	m := new(Response)
+	err := x.stream.Recv(m)
+	if err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *microService) Publish(ctx context.Context, in *Message, opts ...client.CallOption) (*Message, error) {
+	req := c.c.NewRequest(c.name, "Micro.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 Micro service
+
+type MicroHandler interface {
+	// Call allows a single request to be made
+	Call(context.Context, *Request, *Response) error
+	// Stream is a bidirectional stream
+	Stream(context.Context, Micro_StreamStream) error
+	// Publish publishes a message and returns an empty Message
+	Publish(context.Context, *Message, *Message) error
+}
+
+func RegisterMicroHandler(s server.Server, hdlr MicroHandler, opts ...server.HandlerOption) error {
+	type micro 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 Micro struct {
+		micro
+	}
+	h := &microHandler{hdlr}
+	return s.Handle(s.NewHandler(&Micro{h}, opts...))
+}
+
+type microHandler struct {
+	MicroHandler
+}
+
+func (h *microHandler) Call(ctx context.Context, in *Request, out *Response) error {
+	return h.MicroHandler.Call(ctx, in, out)
+}
+
+func (h *microHandler) Stream(ctx context.Context, stream server.Stream) error {
+	return h.MicroHandler.Stream(ctx, &microStreamStream{stream})
+}
+
+type Micro_StreamStream interface {
+	SendMsg(interface{}) error
+	RecvMsg(interface{}) error
+	Close() error
+	Send(*Response) error
+	Recv() (*Request, error)
+}
+
+type microStreamStream struct {
+	stream server.Stream
+}
+
+func (x *microStreamStream) Close() error {
+	return x.stream.Close()
+}
+
+func (x *microStreamStream) SendMsg(m interface{}) error {
+	return x.stream.Send(m)
+}
+
+func (x *microStreamStream) RecvMsg(m interface{}) error {
+	return x.stream.Recv(m)
+}
+
+func (x *microStreamStream) Send(m *Response) error {
+	return x.stream.Send(m)
+}
+
+func (x *microStreamStream) Recv() (*Request, error) {
+	m := new(Request)
+	if err := x.stream.Recv(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (h *microHandler) Publish(ctx context.Context, in *Message, out *Message) error {
+	return h.MicroHandler.Publish(ctx, in, out)
+}

client/proto/client.pb.go

@@ -0,0 +1,388 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: micro/go-micro/client/proto/client.proto
+
+package go_micro_client
+
+import (
+	context "context"
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	grpc "google.golang.org/grpc"
+	math "math"
+)
+
+// 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
+
+type Request struct {
+	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"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Request) Reset()         { *m = Request{} }
+func (m *Request) String() string { return proto.CompactTextString(m) }
+func (*Request) ProtoMessage()    {}
+func (*Request) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7d733ae29171347b, []int{0}
+}
+
+func (m *Request) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Request.Unmarshal(m, b)
+}
+func (m *Request) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Request.Marshal(b, m, deterministic)
+}
+func (m *Request) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Request.Merge(m, src)
+}
+func (m *Request) XXX_Size() int {
+	return xxx_messageInfo_Request.Size(m)
+}
+func (m *Request) XXX_DiscardUnknown() {
+	xxx_messageInfo_Request.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Request proto.InternalMessageInfo
+
+func (m *Request) GetService() string {
+	if m != nil {
+		return m.Service
+	}
+	return ""
+}
+
+func (m *Request) GetEndpoint() string {
+	if m != nil {
+		return m.Endpoint
+	}
+	return ""
+}
+
+func (m *Request) GetContentType() string {
+	if m != nil {
+		return m.ContentType
+	}
+	return ""
+}
+
+func (m *Request) GetBody() []byte {
+	if m != nil {
+		return m.Body
+	}
+	return nil
+}
+
+type Response struct {
+	Body                 []byte   `protobuf:"bytes,1,opt,name=body,proto3" json:"body,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Response) Reset()         { *m = Response{} }
+func (m *Response) String() string { return proto.CompactTextString(m) }
+func (*Response) ProtoMessage()    {}
+func (*Response) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7d733ae29171347b, []int{1}
+}
+
+func (m *Response) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Response.Unmarshal(m, b)
+}
+func (m *Response) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Response.Marshal(b, m, deterministic)
+}
+func (m *Response) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Response.Merge(m, src)
+}
+func (m *Response) XXX_Size() int {
+	return xxx_messageInfo_Response.Size(m)
+}
+func (m *Response) XXX_DiscardUnknown() {
+	xxx_messageInfo_Response.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Response proto.InternalMessageInfo
+
+func (m *Response) GetBody() []byte {
+	if m != nil {
+		return m.Body
+	}
+	return nil
+}
+
+type Message struct {
+	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"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Message) Reset()         { *m = Message{} }
+func (m *Message) String() string { return proto.CompactTextString(m) }
+func (*Message) ProtoMessage()    {}
+func (*Message) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7d733ae29171347b, []int{2}
+}
+
+func (m *Message) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Message.Unmarshal(m, b)
+}
+func (m *Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Message.Marshal(b, m, deterministic)
+}
+func (m *Message) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Message.Merge(m, src)
+}
+func (m *Message) XXX_Size() int {
+	return xxx_messageInfo_Message.Size(m)
+}
+func (m *Message) XXX_DiscardUnknown() {
+	xxx_messageInfo_Message.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Message proto.InternalMessageInfo
+
+func (m *Message) GetTopic() string {
+	if m != nil {
+		return m.Topic
+	}
+	return ""
+}
+
+func (m *Message) GetContentType() string {
+	if m != nil {
+		return m.ContentType
+	}
+	return ""
+}
+
+func (m *Message) GetBody() []byte {
+	if m != nil {
+		return m.Body
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*Request)(nil), "go.micro.client.Request")
+	proto.RegisterType((*Response)(nil), "go.micro.client.Response")
+	proto.RegisterType((*Message)(nil), "go.micro.client.Message")
+}
+
+func init() {
+	proto.RegisterFile("micro/go-micro/client/proto/client.proto", fileDescriptor_7d733ae29171347b)
+}
+
+var fileDescriptor_7d733ae29171347b = []byte{
+	// 270 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x9c, 0x91, 0x3f, 0x4f, 0xc3, 0x30,
+	0x10, 0xc5, 0xeb, 0xfe, 0x4b, 0x39, 0x2a, 0x21, 0x9d, 0x18, 0x4c, 0x06, 0x54, 0x32, 0x65, 0xc1,
+	0x45, 0x30, 0x23, 0x86, 0xce, 0x95, 0x50, 0x40, 0xac, 0x28, 0x71, 0x4f, 0xc1, 0x52, 0x6a, 0x9b,
+	0xd8, 0xad, 0x94, 0xef, 0xc8, 0x87, 0x42, 0x38, 0x29, 0x45, 0xd0, 0x2e, 0x6c, 0xf7, 0xee, 0x67,
+	0xbd, 0x3b, 0xbf, 0x83, 0x74, 0xad, 0x64, 0x6d, 0xe6, 0xa5, 0xb9, 0x6e, 0x0b, 0x59, 0x29, 0xd2,
+	0x7e, 0x6e, 0x6b, 0xe3, 0x77, 0x42, 0x04, 0x81, 0x67, 0xa5, 0x11, 0xe1, 0x8d, 0x68, 0xdb, 0xc9,
+	0x16, 0xa2, 0x8c, 0xde, 0x37, 0xe4, 0x3c, 0x72, 0x88, 0x1c, 0xd5, 0x5b, 0x25, 0x89, 0xb3, 0x19,
+	0x4b, 0x4f, 0xb2, 0x9d, 0xc4, 0x18, 0x26, 0xa4, 0x57, 0xd6, 0x28, 0xed, 0x79, 0x3f, 0xa0, 0x6f,
+	0x8d, 0x57, 0x30, 0x95, 0x46, 0x7b, 0xd2, 0xfe, 0xd5, 0x37, 0x96, 0xf8, 0x20, 0xf0, 0xd3, 0xae,
+	0xf7, 0xdc, 0x58, 0x42, 0x84, 0x61, 0x61, 0x56, 0x0d, 0x1f, 0xce, 0x58, 0x3a, 0xcd, 0x42, 0x9d,
+	0x5c, 0xc2, 0x24, 0x23, 0x67, 0x8d, 0x76, 0x7b, 0xce, 0x7e, 0xf0, 0x17, 0x88, 0x96, 0xe4, 0x5c,
+	0x5e, 0x12, 0x9e, 0xc3, 0xc8, 0x1b, 0xab, 0x64, 0xb7, 0x55, 0x2b, 0xfe, 0xcc, 0xed, 0x1f, 0x9f,
+	0x3b, 0xd8, 0xfb, 0xde, 0x7e, 0x30, 0x18, 0x2d, 0xbf, 0x02, 0xc0, 0x7b, 0x18, 0x2e, 0xf2, 0xaa,
+	0x42, 0x2e, 0x7e, 0x65, 0x22, 0xba, 0x40, 0xe2, 0x8b, 0x03, 0xa4, 0x5d, 0x39, 0xe9, 0xe1, 0x02,
+	0xc6, 0x4f, 0xbe, 0xa6, 0x7c, 0xfd, 0x4f, 0x83, 0x94, 0xdd, 0x30, 0x7c, 0x80, 0xe8, 0x71, 0x53,
+	0x54, 0xca, 0xbd, 0x1d, 0x70, 0xe9, 0xfe, 0x1f, 0x1f, 0x25, 0x49, 0xaf, 0x18, 0x87, 0xb3, 0xde,
+	0x7d, 0x06, 0x00, 0x00, 0xff, 0xff, 0xd3, 0x63, 0x94, 0x1a, 0x02, 0x02, 0x00, 0x00,
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// 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.SupportPackageIsVersion4
+
+// MicroClient is the client API for Micro service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type MicroClient 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) (Micro_StreamClient, error)
+	// Publish publishes a message and returns an empty Message
+	Publish(ctx context.Context, in *Message, opts ...grpc.CallOption) (*Message, error)
+}
+
+type microClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewMicroClient(cc *grpc.ClientConn) MicroClient {
+	return &microClient{cc}
+}
+
+func (c *microClient) Call(ctx context.Context, in *Request, opts ...grpc.CallOption) (*Response, error) {
+	out := new(Response)
+	err := c.cc.Invoke(ctx, "/go.micro.client.Micro/Call", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *microClient) Stream(ctx context.Context, opts ...grpc.CallOption) (Micro_StreamClient, error) {
+	stream, err := c.cc.NewStream(ctx, &_Micro_serviceDesc.Streams[0], "/go.micro.client.Micro/Stream", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &microStreamClient{stream}
+	return x, nil
+}
+
+type Micro_StreamClient interface {
+	Send(*Request) error
+	Recv() (*Response, error)
+	grpc.ClientStream
+}
+
+type microStreamClient struct {
+	grpc.ClientStream
+}
+
+func (x *microStreamClient) Send(m *Request) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *microStreamClient) Recv() (*Response, error) {
+	m := new(Response)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *microClient) Publish(ctx context.Context, in *Message, opts ...grpc.CallOption) (*Message, error) {
+	out := new(Message)
+	err := c.cc.Invoke(ctx, "/go.micro.client.Micro/Publish", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// MicroServer is the server API for Micro service.
+type MicroServer interface {
+	// Call allows a single request to be made
+	Call(context.Context, *Request) (*Response, error)
+	// Stream is a bidirectional stream
+	Stream(Micro_StreamServer) error
+	// Publish publishes a message and returns an empty Message
+	Publish(context.Context, *Message) (*Message, error)
+}
+
+func RegisterMicroServer(s *grpc.Server, srv MicroServer) {
+	s.RegisterService(&_Micro_serviceDesc, srv)
+}
+
+func _Micro_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.(MicroServer).Call(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/go.micro.client.Micro/Call",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(MicroServer).Call(ctx, req.(*Request))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Micro_Stream_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(MicroServer).Stream(&microStreamServer{stream})
+}
+
+type Micro_StreamServer interface {
+	Send(*Response) error
+	Recv() (*Request, error)
+	grpc.ServerStream
+}
+
+type microStreamServer struct {
+	grpc.ServerStream
+}
+
+func (x *microStreamServer) Send(m *Response) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *microStreamServer) Recv() (*Request, error) {
+	m := new(Request)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func _Micro_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.(MicroServer).Publish(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/go.micro.client.Micro/Publish",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(MicroServer).Publish(ctx, req.(*Message))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _Micro_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "go.micro.client.Micro",
+	HandlerType: (*MicroServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "Call",
+			Handler:    _Micro_Call_Handler,
+		},
+		{
+			MethodName: "Publish",
+			Handler:    _Micro_Publish_Handler,
+		},
+	},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "Stream",
+			Handler:       _Micro_Stream_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "micro/go-micro/client/proto/client.proto",
+}

client/proto/client.proto

@@ -0,0 +1,30 @@
+syntax = "proto3";
+
+package go.micro.client;
+
+// Micro is the micro client interface
+service Micro {
+	// 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;
+}

client/rpc_client.go

@@ -1,40 +1,45 @@
 package client
 
 import (
-	"bytes"
 	"context"
 	"fmt"
-	"net"
 	"os"
-	"strconv"
 	"sync"
 	"sync/atomic"
 	"time"
 
 	"github.com/google/uuid"
 	"github.com/micro/go-micro/broker"
+	"github.com/micro/go-micro/client/pool"
+	"github.com/micro/go-micro/client/selector"
 	"github.com/micro/go-micro/codec"
 	"github.com/micro/go-micro/errors"
 	"github.com/micro/go-micro/metadata"
 	"github.com/micro/go-micro/registry"
-	"github.com/micro/go-micro/selector"
 	"github.com/micro/go-micro/transport"
+	"github.com/micro/go-micro/util/buf"
 )
 
 type rpcClient struct {
 	once sync.Once
 	opts Options
-	pool *pool
+	pool pool.Pool
 	seq  uint64
 }
 
 func newRpcClient(opt ...Option) Client {
 	opts := newOptions(opt...)
 
+	p := pool.NewPool(
+		pool.Size(opts.PoolSize),
+		pool.TTL(opts.PoolTTL),
+		pool.Transport(opts.Transport),
+	)
+
 	rc := &rpcClient{
 		once: sync.Once{},
 		opts: opts,
-		pool: newPool(opts.PoolSize, opts.PoolTTL),
+		pool: p,
 		seq:  0,
 	}
 
@@ -60,9 +65,6 @@ func (r *rpcClient) newCodec(contentType string) (codec.NewCodec, error) {
 
 func (r *rpcClient) call(ctx context.Context, node *registry.Node, req Request, resp interface{}, opts CallOptions) error {
 	address := node.Address
-	if node.Port > 0 {
-		address = fmt.Sprintf("%s:%d", address, node.Port)
-	}
 
 	msg := &transport.Message{
 		Header: make(map[string]string),
@@ -95,13 +97,13 @@ func (r *rpcClient) call(ctx context.Context, node *registry.Node, req Request,
 	}
 
 	var grr error
-	c, err := r.pool.getConn(address, r.opts.Transport, transport.WithTimeout(opts.DialTimeout))
+	c, err := r.pool.Get(address, transport.WithTimeout(opts.DialTimeout))
 	if err != nil {
 		return errors.InternalServerError("go.micro.client", "connection error: %v", err)
 	}
 	defer func() {
 		// defer execution of release
-		r.pool.release(address, c, grr)
+		r.pool.Release(c, grr)
 	}()
 
 	seq := atomic.LoadUint64(&r.seq)
@@ -160,9 +162,6 @@ func (r *rpcClient) call(ctx context.Context, node *registry.Node, req Request,
 
 func (r *rpcClient) stream(ctx context.Context, node *registry.Node, req Request, opts CallOptions) (Stream, error) {
 	address := node.Address
-	if node.Port > 0 {
-		address = fmt.Sprintf("%s:%d", address, node.Port)
-	}
 
 	msg := &transport.Message{
 		Header: make(map[string]string),
@@ -253,17 +252,22 @@ func (r *rpcClient) stream(ctx context.Context, node *registry.Node, req Request
 func (r *rpcClient) Init(opts ...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 {
+	if size != r.opts.PoolSize || ttl != r.opts.PoolTTL || tr != r.opts.Transport {
-		r.pool.Lock()
+		// close existing pool
-		r.pool.size = r.opts.PoolSize
+		r.pool.Close()
-		r.pool.ttl = int64(r.opts.PoolTTL.Seconds())
+		// create new pool
-		r.pool.Unlock()
+		r.pool = pool.NewPool(
+			pool.Size(r.opts.PoolSize),
+			pool.TTL(r.opts.PoolTTL),
+			pool.Transport(r.opts.Transport),
+		)
 	}
 
 	return nil
@@ -283,29 +287,26 @@ func (r *rpcClient) next(request Request, opts CallOptions) (selector.Next, erro
 
 	// get proxy address
 	if prx := os.Getenv("MICRO_PROXY_ADDRESS"); len(prx) > 0 {
-		opts.Address = prx
+		opts.Address = []string{prx}
 	}
 
 	// return remote address
 	if len(opts.Address) > 0 {
-		address := opts.Address
+		nodes := make([]*registry.Node, len(opts.Address))
-		port := 0
 
-		host, sport, err := net.SplitHostPort(opts.Address)
+		for i, address := range opts.Address {
-		if err == nil {
+			nodes[i] = &registry.Node{
-			address = host
-			port, _ = strconv.Atoi(sport)
-		}
-
-		return func() (*registry.Node, error) {
-			return &registry.Node{
 				Address: address,
-				Port:    port,
 				// Set the protocol
 				Metadata: map[string]string{
 					"protocol": "mucp",
 				},
-			}, nil
+			}
+		}
+
+		// crude return method
+		return func() (*registry.Node, error) {
+			return nodes[time.Now().Unix()%int64(len(nodes))], nil
 		}, nil
 	}
 
@@ -537,10 +538,13 @@ func (r *rpcClient) Publish(ctx context.Context, msg Message, opts ...PublishOpt
 	if err != nil {
 		return errors.InternalServerError("go.micro.client", err.Error())
 	}
-	b := &buffer{bytes.NewBuffer(nil)}
+
+	// new buffer
+	b := buf.New(nil)
+
 	if err := cf(b).Write(&codec.Message{
 		Target: topic,
-		Type:   codec.Publication,
+		Type:   codec.Event,
 		Header: map[string]string{
 			"Micro-Id":    id,
 			"Micro-Topic": msg.Topic(),

client/rpc_client_test.go

@@ -5,10 +5,10 @@ import (
 	"fmt"
 	"testing"
 
+	"github.com/micro/go-micro/client/selector"
 	"github.com/micro/go-micro/errors"
 	"github.com/micro/go-micro/registry"
 	"github.com/micro/go-micro/registry/memory"
-	"github.com/micro/go-micro/selector"
 )
 
 func newTestRegistry() registry.Registry {
@@ -22,8 +22,7 @@ func TestCallAddress(t *testing.T) {
 	var called bool
 	service := "test.service"
 	endpoint := "Test.Endpoint"
-	address := "10.1.10.1"
+	address := "10.1.10.1:8080"
-	port := 8080
 
 	wrap := func(cf CallFunc) CallFunc {
 		return func(ctx context.Context, node *registry.Node, req Request, rsp interface{}, opts CallOptions) error {
@@ -41,10 +40,6 @@ func TestCallAddress(t *testing.T) {
 				return fmt.Errorf("expected address: %s got %s", address, node.Address)
 			}
 
-			if node.Port != port {
-				return fmt.Errorf("expected address: %d got %d", port, node.Port)
-			}
-
 			// don't do the call
 			return nil
 		}
@@ -60,7 +55,7 @@ func TestCallAddress(t *testing.T) {
 	req := c.NewRequest(service, endpoint, nil)
 
 	// test calling remote address
-	if err := c.Call(context.Background(), req, nil, WithAddress(fmt.Sprintf("%s:%d", address, port))); err != nil {
+	if err := c.Call(context.Background(), req, nil, WithAddress(address)); err != nil {
 		t.Fatal("call with address error", err)
 	}
 
@@ -114,8 +109,7 @@ func TestCallWrapper(t *testing.T) {
 	id := "test.1"
 	service := "test.service"
 	endpoint := "Test.Endpoint"
-	address := "10.1.10.1"
+	address := "10.1.10.1:8080"
-	port := 8080
 
 	wrap := func(cf CallFunc) CallFunc {
 		return func(ctx context.Context, node *registry.Node, req Request, rsp interface{}, opts CallOptions) error {
@@ -152,7 +146,6 @@ func TestCallWrapper(t *testing.T) {
 			&registry.Node{
 				Id:      id,
 				Address: address,
-				Port:    port,
 			},
 		},
 	})

client/rpc_pool.go

@@ -1,87 +0,0 @@
-package client
-
-import (
-	"sync"
-	"time"
-
-	"github.com/micro/go-micro/transport"
-)
-
-type pool struct {
-	size int
-	ttl  int64
-
-	sync.Mutex
-	conns map[string][]*poolConn
-}
-
-type poolConn struct {
-	transport.Client
-	created int64
-}
-
-func newPool(size int, ttl time.Duration) *pool {
-	return &pool{
-		size:  size,
-		ttl:   int64(ttl.Seconds()),
-		conns: make(map[string][]*poolConn),
-	}
-}
-
-// NoOp the Close since we manage it
-func (p *poolConn) Close() error {
-	return nil
-}
-
-func (p *pool) getConn(addr string, tr transport.Transport, opts ...transport.DialOption) (*poolConn, error) {
-	p.Lock()
-	conns := p.conns[addr]
-	now := time.Now().Unix()
-
-	// while we have conns check age and then return one
-	// otherwise we'll create a new conn
-	for len(conns) > 0 {
-		conn := conns[len(conns)-1]
-		conns = conns[:len(conns)-1]
-		p.conns[addr] = conns
-
-		// if conn is old kill it and move on
-		if d := now - conn.created; d > p.ttl {
-			conn.Client.Close()
-			continue
-		}
-
-		// we got a good conn, lets unlock and return it
-		p.Unlock()
-
-		return conn, nil
-	}
-
-	p.Unlock()
-
-	// create new conn
-	c, err := tr.Dial(addr, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return &poolConn{c, time.Now().Unix()}, nil
-}
-
-func (p *pool) release(addr string, conn *poolConn, err error) {
-	// don't store the conn if it has errored
-	if err != nil {
-		conn.Client.Close()
-		return
-	}
-
-	// otherwise put it back for reuse
-	p.Lock()
-	conns := p.conns[addr]
-	if len(conns) >= p.size {
-		p.Unlock()
-		conn.Client.Close()
-		return
-	}
-	p.conns[addr] = append(conns, conn)
-	p.Unlock()
-}

client/selector/common_test.go

@@ -14,13 +14,11 @@ var (
 				Nodes: []*registry.Node{
 					{
 						Id:      "foo-1.0.0-123",
-						Address: "localhost",
+						Address: "localhost:9999",
-						Port:    9999,
 					},
 					{
 						Id:      "foo-1.0.0-321",
-						Address: "localhost",
+						Address: "localhost:9999",
-						Port:    9999,
 					},
 				},
 			},
@@ -30,8 +28,7 @@ var (
 				Nodes: []*registry.Node{
 					{
 						Id:      "foo-1.0.1-321",
-						Address: "localhost",
+						Address: "localhost:6666",
-						Port:    6666,
 					},
 				},
 			},
@@ -41,8 +38,7 @@ var (
 				Nodes: []*registry.Node{
 					{
 						Id:      "foo-1.0.3-345",
-						Address: "localhost",
+						Address: "localhost:8888",
-						Port:    8888,
 					},
 				},
 			},

client/selector/dns/dns.go

@@ -2,11 +2,12 @@
 package dns
 
 import (
+	"fmt"
 	"net"
 	"strconv"
 
+	"github.com/micro/go-micro/client/selector"
 	"github.com/micro/go-micro/registry"
-	"github.com/micro/go-micro/selector"
 )
 
 type dnsSelector struct {
@@ -66,8 +67,7 @@ func (d *dnsSelector) Select(service string, opts ...selector.SelectOption) (sel
 	for _, node := range srv {
 		nodes = append(nodes, &registry.Node{
 			Id:      node.Target,
-			Address: node.Target,
+			Address: fmt.Sprintf("%s:%d", node.Target, node.Port),
-			Port:    int(node.Port),
 		})
 	}
 

client/selector/registry/options.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"time"
 
-	"github.com/micro/go-micro/selector"
+	"github.com/micro/go-micro/client/selector"
 )
 
 // Set the registry cache ttl

client/selector/registry/registry.go

@@ -2,7 +2,7 @@
 package registry
 
 import (
-	"github.com/micro/go-micro/selector"
+	"github.com/micro/go-micro/client/selector"
 )
 
 // NewSelector returns a new registry selector

client/selector/router/router.go

@@ -0,0 +1,272 @@
+// Package router is a network/router selector
+package router
+
+import (
+	"context"
+	"os"
+	"sort"
+	"sync"
+
+	"github.com/micro/go-micro/client"
+	"github.com/micro/go-micro/client/selector"
+	"github.com/micro/go-micro/registry"
+	"github.com/micro/go-micro/router"
+	pb "github.com/micro/go-micro/router/proto"
+)
+
+type routerSelector struct {
+	opts selector.Options
+
+	// the router
+	r router.Router
+
+	// the client we have
+	c client.Client
+
+	// the client for the remote router
+	rs pb.RouterService
+
+	// name of the router
+	name string
+
+	// address of the remote router
+	addr string
+
+	// whether to use the remote router
+	remote bool
+}
+
+type clientKey struct{}
+type routerKey struct{}
+
+// getRoutes returns the routes whether they are remote or local
+func (r *routerSelector) getRoutes(service string) ([]router.Route, error) {
+	if !r.remote {
+		// lookup router for routes for the service
+		return r.r.Lookup(router.NewQuery(
+			router.QueryService(service),
+		))
+	}
+
+	// lookup the remote router
+
+	var addrs []string
+
+	// set the remote address if specified
+	if len(r.addr) > 0 {
+		addrs = append(addrs, r.addr)
+	} else {
+		// we have a name so we need to check the registry
+		services, err := r.c.Options().Registry.GetService(r.name)
+		if err != nil {
+			return nil, err
+		}
+
+		for _, service := range services {
+			for _, node := range service.Nodes {
+				addrs = append(addrs, node.Address)
+			}
+		}
+	}
+
+	// no router addresses available
+	if len(addrs) == 0 {
+		return nil, selector.ErrNoneAvailable
+	}
+
+	var pbRoutes *pb.LookupResponse
+	var err error
+
+	// TODO: implement backoff and retries
+	for _, addr := range addrs {
+		// call the router
+		pbRoutes, err = r.rs.Lookup(context.Background(), &pb.LookupRequest{
+			Query: &pb.Query{
+				Service: service,
+			},
+		}, client.WithAddress(addr))
+		if err != nil {
+			continue
+		}
+		break
+	}
+
+	// errored out
+	if err != nil {
+		return nil, err
+	}
+
+	// no routes
+	if pbRoutes == nil {
+		return nil, selector.ErrNoneAvailable
+	}
+
+	var routes []router.Route
+
+	// convert from pb to []*router.Route
+	for _, r := range pbRoutes.Routes {
+		routes = append(routes, router.Route{
+			Service: r.Service,
+			Address: r.Address,
+			Gateway: r.Gateway,
+			Network: r.Network,
+			Link:    r.Link,
+			Metric:  int(r.Metric),
+		})
+	}
+
+	return routes, nil
+}
+
+func (r *routerSelector) Init(opts ...selector.Option) error {
+	// no op
+	return nil
+}
+
+func (r *routerSelector) Options() selector.Options {
+	return r.opts
+}
+
+func (r *routerSelector) Select(service string, opts ...selector.SelectOption) (selector.Next, error) {
+	// TODO: pull routes asynchronously and cache
+	routes, err := r.getRoutes(service)
+	if err != nil {
+		return nil, err
+	}
+
+	// no routes return not found error
+	if len(routes) == 0 {
+		return nil, selector.ErrNotFound
+	}
+
+	// TODO: apply filters by pseudo constructing service
+
+	// sort the routes based on metric
+	sort.Slice(routes, func(i, j int) bool {
+		return routes[i].Metric < routes[j].Metric
+	})
+
+	// roundrobin assuming routes are in metric preference order
+	var i int
+	var mtx sync.Mutex
+
+	return func() (*registry.Node, error) {
+		// get index and increment counter with every call to next
+		mtx.Lock()
+		idx := i
+		i++
+		mtx.Unlock()
+
+		// get route based on idx
+		route := routes[idx%len(routes)]
+
+		// defaults to gateway and no port
+		address := route.Address
+		if len(route.Gateway) > 0 {
+			address = route.Gateway
+		}
+
+		// return as a node
+		return &registry.Node{
+			// TODO: add id and metadata if we can
+			Address: address,
+		}, nil
+	}, nil
+}
+
+func (r *routerSelector) Mark(service string, node *registry.Node, err error) {
+	// TODO: pass back metrics or information to the router
+	return
+}
+
+func (r *routerSelector) Reset(service string) {
+	// TODO: reset the metrics or information at the router
+	return
+}
+
+func (r *routerSelector) Close() error {
+	// stop the router advertisements
+	return r.r.Stop()
+}
+
+func (r *routerSelector) String() string {
+	return "router"
+}
+
+// NewSelector returns a new router based selector
+func NewSelector(opts ...selector.Option) selector.Selector {
+	options := selector.Options{
+		Context: context.Background(),
+	}
+
+	for _, o := range opts {
+		o(&options)
+	}
+
+	// set default registry if not set
+	if options.Registry == nil {
+		options.Registry = registry.DefaultRegistry
+	}
+
+	// try get router from the context
+	r, ok := options.Context.Value(routerKey{}).(router.Router)
+	if !ok {
+		// TODO: Use router.DefaultRouter?
+		r = router.NewRouter(
+			router.Registry(options.Registry),
+		)
+	}
+
+	// try get client from the context
+	c, ok := options.Context.Value(clientKey{}).(client.Client)
+	if !ok {
+		c = client.DefaultClient
+	}
+
+	// get the router from env vars if its a remote service
+	remote := true
+	routerName := os.Getenv("MICRO_ROUTER")
+	routerAddress := os.Getenv("MICRO_ROUTER_ADDRESS")
+
+	// start the router advertisements if we're running it locally
+	if len(routerName) == 0 && len(routerAddress) == 0 {
+		go r.Advertise()
+		remote = false
+	}
+
+	return &routerSelector{
+		opts: options,
+		// set the internal router
+		r: r,
+		// set the client
+		c: c,
+		// set the router client
+		rs: pb.NewRouterService(routerName, c),
+		// name of the router
+		name: routerName,
+		// address of router
+		addr: routerAddress,
+		// let ourselves know to use the remote router
+		remote: remote,
+	}
+}
+
+// WithClient sets the client for the request
+func WithClient(c client.Client) selector.Option {
+	return func(o *selector.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, clientKey{}, c)
+	}
+}
+
+// WithRouter sets the router as an option
+func WithRouter(r router.Router) selector.Option {
+	return func(o *selector.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, routerKey{}, r)
+	}
+}

client/selector/static/static.go

@@ -2,11 +2,8 @@
 package static
 
 import (
-	"net"
+	"github.com/micro/go-micro/client/selector"
-	"strconv"
-
 	"github.com/micro/go-micro/registry"
-	"github.com/micro/go-micro/selector"
 )
 
 // staticSelector is a static selector
@@ -26,20 +23,10 @@ func (s *staticSelector) Options() selector.Options {
 }
 
 func (s *staticSelector) Select(service string, opts ...selector.SelectOption) (selector.Next, error) {
-	var port int
-	addr, pt, err := net.SplitHostPort(service)
-	if err != nil {
-		addr = service
-		port = 0
-	} else {
-		port, _ = strconv.Atoi(pt)
-	}
-
 	return func() (*registry.Node, error) {
 		return &registry.Node{
 			Id:      service,
-			Address: addr,
+			Address: service,
-			Port:    port,
 		}, nil
 	}, nil
 }

client/selector/strategy_test.go

@@ -14,13 +14,11 @@ func TestStrategies(t *testing.T) {
 			Nodes: []*registry.Node{
 				&registry.Node{
 					Id:      "test1-1",
-					Address: "10.0.0.1",
+					Address: "10.0.0.1:1001",
-					Port:    1001,
 				},
 				&registry.Node{
 					Id:      "test1-2",
-					Address: "10.0.0.2",
+					Address: "10.0.0.2:1002",
-					Port:    1002,
 				},
 			},
 		},
@@ -30,13 +28,11 @@ func TestStrategies(t *testing.T) {
 			Nodes: []*registry.Node{
 				&registry.Node{
 					Id:      "test1-3",
-					Address: "10.0.0.3",
+					Address: "10.0.0.3:1003",
-					Port:    1003,
 				},
 				&registry.Node{
 					Id:      "test1-4",
-					Address: "10.0.0.4",
+					Address: "10.0.0.4:1004",
-					Port:    1004,
 				},
 			},
 		},

codec/codec.go

@@ -9,7 +9,7 @@ const (
 	Error MessageType = iota
 	Request
 	Response
-	Publication
+	Event
 )
 
 type MessageType int

codec/jsonrpc/jsonrpc.go

@@ -33,7 +33,7 @@ func (j *jsonCodec) Write(m *codec.Message, b interface{}) error {
 		return j.c.Write(m, b)
 	case codec.Response, codec.Error:
 		return j.s.Write(m, b)
-	case codec.Publication:
+	case codec.Event:
 		data, err := json.Marshal(b)
 		if err != nil {
 			return err
@@ -54,7 +54,7 @@ func (j *jsonCodec) ReadHeader(m *codec.Message, mt codec.MessageType) error {
 		return j.s.ReadHeader(m)
 	case codec.Response:
 		return j.c.ReadHeader(m)
-	case codec.Publication:
+	case codec.Event:
 		_, err := io.Copy(j.buf, j.rwc)
 		return err
 	default:
@@ -69,7 +69,7 @@ func (j *jsonCodec) ReadBody(b interface{}) error {
 		return j.s.ReadBody(b)
 	case codec.Response:
 		return j.c.ReadBody(b)
-	case codec.Publication:
+	case codec.Event:
 		if b != nil {
 			return json.Unmarshal(j.buf.Bytes(), b)
 		}

codec/protorpc/protorpc.go

@@ -99,7 +99,7 @@ func (c *protoCodec) Write(m *codec.Message, b interface{}) error {
 				return err
 			}
 		}
-	case codec.Publication:
+	case codec.Event:
 		data, err := proto.Marshal(b.(proto.Message))
 		if err != nil {
 			return err
@@ -141,7 +141,7 @@ func (c *protoCodec) ReadHeader(m *codec.Message, mt codec.MessageType) error {
 		m.Method = rtmp.GetServiceMethod()
 		m.Id = fmt.Sprintf("%d", rtmp.GetSeq())
 		m.Error = rtmp.GetError()
-	case codec.Publication:
+	case codec.Event:
 		_, err := io.Copy(c.buf, c.rwc)
 		return err
 	default:
@@ -159,7 +159,7 @@ func (c *protoCodec) ReadBody(b interface{}) error {
 		if err != nil {
 			return err
 		}
-	case codec.Publication:
+	case codec.Event:
 		data = c.buf.Bytes()
 	default:
 		return fmt.Errorf("Unrecognised message type: %v", c.mt)

common_test.go

@@ -14,13 +14,11 @@ var (
 				Nodes: []*registry.Node{
 					{
 						Id:      "foo-1.0.0-123",
-						Address: "localhost",
+						Address: "localhost:9999",
-						Port:    9999,
 					},
 					{
 						Id:      "foo-1.0.0-321",
-						Address: "localhost",
+						Address: "localhost:9999",
-						Port:    9999,
 					},
 				},
 			},
@@ -30,8 +28,7 @@ var (
 				Nodes: []*registry.Node{
 					{
 						Id:      "foo-1.0.1-321",
-						Address: "localhost",
+						Address: "localhost:6666",
-						Port:    6666,
 					},
 				},
 			},
@@ -41,8 +38,7 @@ var (
 				Nodes: []*registry.Node{
 					{
 						Id:      "foo-1.0.3-345",
-						Address: "localhost",
+						Address: "localhost:8888",
-						Port:    8888,
 					},
 				},
 			},

config/README.md

@@ -1,6 +1,6 @@
 # Config [![GoDoc](https://godoc.org/github.com/micro/go-micro/config?status.svg)](https://godoc.org/github.com/micro/go-micro/config)
 
-Go Config is a pluggable dynamic config library.
+Config is a pluggable dynamic config package
 
 Most config in applications are statically configured or include complex logic to load from multiple sources. 
 Go Config makes this easy, pluggable and mergeable. You'll never have to deal with config in the same way again.

config/cmd/cmd.go

@@ -14,8 +14,8 @@ import (
 	cgrpc "github.com/micro/go-micro/client/grpc"
 	cmucp "github.com/micro/go-micro/client/mucp"
 	"github.com/micro/go-micro/server"
-	smucp "github.com/micro/go-micro/server/mucp"
 	sgrpc "github.com/micro/go-micro/server/grpc"
+	smucp "github.com/micro/go-micro/server/mucp"
 	"github.com/micro/go-micro/util/log"
 
 	// brokers
@@ -32,15 +32,17 @@ import (
 	rmem "github.com/micro/go-micro/registry/memory"
 
 	// selectors
-	"github.com/micro/go-micro/selector"
+	"github.com/micro/go-micro/client/selector"
-	"github.com/micro/go-micro/selector/dns"
+	"github.com/micro/go-micro/client/selector/dns"
-	"github.com/micro/go-micro/selector/static"
+	"github.com/micro/go-micro/client/selector/router"
+	"github.com/micro/go-micro/client/selector/static"
 
 	// transports
 	"github.com/micro/go-micro/transport"
 	tgrpc "github.com/micro/go-micro/transport/grpc"
 	thttp "github.com/micro/go-micro/transport/http"
 	tmem "github.com/micro/go-micro/transport/memory"
+	"github.com/micro/go-micro/transport/quic"
 )
 
 type Cmd interface {
@@ -196,6 +198,7 @@ var (
 		"default": selector.NewSelector,
 		"dns":     dns.NewSelector,
 		"cache":   selector.NewSelector,
+		"router":  router.NewSelector,
 		"static":  static.NewSelector,
 	}
 
@@ -209,6 +212,7 @@ var (
 		"memory": tmem.NewTransport,
 		"http":   thttp.NewTransport,
 		"grpc":   tgrpc.NewTransport,
+		"quic":   quic.NewTransport,
 	}
 
 	// used for default selection as the fall back

config/cmd/options.go

@@ -5,8 +5,8 @@ import (
 
 	"github.com/micro/go-micro/broker"
 	"github.com/micro/go-micro/client"
+	"github.com/micro/go-micro/client/selector"
 	"github.com/micro/go-micro/registry"
-	"github.com/micro/go-micro/selector"
 	"github.com/micro/go-micro/server"
 	"github.com/micro/go-micro/transport"
 )

config/default_test.go

@@ -8,9 +8,25 @@ import (
 	"testing"
 	"time"
 
+	"github.com/micro/go-micro/config/source/env"
 	"github.com/micro/go-micro/config/source/file"
 )
 
+func createFileForIssue18(t *testing.T, content string) *os.File {
+	data := []byte(content)
+	path := filepath.Join(os.TempDir(), fmt.Sprintf("file.%d", time.Now().UnixNano()))
+	fh, err := os.Create(path)
+	if err != nil {
+		t.Error(err)
+	}
+	_, err = fh.Write(data)
+	if err != nil {
+		t.Error(err)
+	}
+
+	return fh
+}
+
 func createFileForTest(t *testing.T) *os.File {
 	data := []byte(`{"foo": "bar"}`)
 	path := filepath.Join(os.TempDir(), fmt.Sprintf("file.%d", time.Now().UnixNano()))
@@ -26,7 +42,7 @@ func createFileForTest(t *testing.T) *os.File {
 	return fh
 }
 
-func TestLoadWithGoodFile(t *testing.T) {
+func TestConfigLoadWithGoodFile(t *testing.T) {
 	fh := createFileForTest(t)
 	path := fh.Name()
 	defer func() {
@@ -44,7 +60,7 @@ func TestLoadWithGoodFile(t *testing.T) {
 	}
 }
 
-func TestLoadWithInvalidFile(t *testing.T) {
+func TestConfigLoadWithInvalidFile(t *testing.T) {
 	fh := createFileForTest(t)
 	path := fh.Name()
 	defer func() {
@@ -68,34 +84,35 @@ func TestLoadWithInvalidFile(t *testing.T) {
 	}
 }
 
-func TestConsul(t *testing.T) {
+func TestConfigMerge(t *testing.T) {
-	/*consulSource := consul.NewSource(
+	fh := createFileForIssue18(t, `{
-		// optionally specify consul address; default to localhost:8500
+  "amqp": {
-		consul.WithAddress("131.150.38.111:8500"),
+    "host": "rabbit.platform",
-		// optionally specify prefix; defaults to /micro/config
+    "port": 80
-		consul.WithPrefix("/project"),
+  },
-		// optionally strip the provided prefix from the keys, defaults to false
+  "handler": {
-		consul.StripPrefix(true),
+    "exchange": "springCloudBus"
-		consul.WithDatacenter("dc1"),
+  }
-		consul.WithToken("xxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"),
+}`)
+	path := fh.Name()
+	defer func() {
+		fh.Close()
+		os.Remove(path)
+	}()
+	os.Setenv("AMQP_HOST", "rabbit.testing.com")
+
+	conf := NewConfig()
+	conf.Load(
+		file.NewSource(
+			file.WithPath(path),
+		),
+		env.NewSource(),
 	)
 
-	// Create new config
+	actualHost := conf.Get("amqp", "host").String("backup")
-	conf := NewConfig()
+	if actualHost != "rabbit.testing.com" {
-
+		t.Fatalf("Expected %v but got %v",
-	// Load file source
+			"rabbit.testing.com",
-	err := conf.Load(consulSource)
+			actualHost)
-	if err != nil {
-		t.Error(err)
-		return
 	}
-
-	m := conf.Map()
-	t.Log("m: ", m)
-
-	v := conf.Get("project", "dc111", "port")
-
-	t.Log("v: ", v.Int(13))*/
-
-	t.Log("OK")
 }

config/issue18_test.go

@@ -1,60 +0,0 @@
-package config
-
-import (
-	"fmt"
-	"os"
-	"path/filepath"
-	"testing"
-	"time"
-
-	"github.com/micro/go-micro/config/source/env"
-	"github.com/micro/go-micro/config/source/file"
-)
-
-func createFileForIssue18(t *testing.T, content string) *os.File {
-	data := []byte(content)
-	path := filepath.Join(os.TempDir(), fmt.Sprintf("file.%d", time.Now().UnixNano()))
-	fh, err := os.Create(path)
-	if err != nil {
-		t.Error(err)
-	}
-	_, err = fh.Write(data)
-	if err != nil {
-		t.Error(err)
-	}
-
-	return fh
-}
-
-func TestIssue18(t *testing.T) {
-	fh := createFileForIssue18(t, `{
-  "amqp": {
-    "host": "rabbit.platform",
-    "port": 80
-  },
-  "handler": {
-    "exchange": "springCloudBus"
-  }
-}`)
-	path := fh.Name()
-	defer func() {
-		fh.Close()
-		os.Remove(path)
-	}()
-	os.Setenv("AMQP_HOST", "rabbit.testing.com")
-
-	conf := NewConfig()
-	conf.Load(
-		file.NewSource(
-			file.WithPath(path),
-		),
-		env.NewSource(),
-	)
-
-	actualHost := conf.Get("amqp", "host").String("backup")
-	if actualHost != "rabbit.testing.com" {
-		t.Fatalf("Expected %v but got %v",
-			"rabbit.testing.com",
-			actualHost)
-	}
-}

config/reader/json/values_test.go

@@ -1,39 +1,85 @@
 package json
 
 import (
+	"reflect"
 	"testing"
 
 	"github.com/micro/go-micro/config/source"
 )
 
 func TestValues(t *testing.T) {
-	data := []byte(`{"foo": "bar", "baz": {"bar": "cat"}}`)
+	emptyStr := ""
-
 	testData := []struct {
+		csdata   []byte
 		path     []string
-		value 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: data,
+			Data: test.csdata,
 		})
-
 		if err != nil {
 			t.Fatal(err)
 		}
 
-	for _, test := range testData {
+		err = values.Get(test.path...).Scan(&test.accepter)
-		if v := values.Get(test.path...).String(""); v != test.value {
+		if err != nil {
-			t.Fatalf("Expected %s got %s for path %v", test.value, v, test.path)
+			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{T{Foo: "bar"}},
+		},
+	}
+
+	for idx, test := range testData {
+		values, err := newValues(&source.ChangeSet{
+			Data: test.csdata,
+		})
+		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)
 		}
 	}
 }

config/source/cli/cli.go

@@ -9,7 +9,7 @@ import (
 
 	"github.com/imdario/mergo"
 	"github.com/micro/cli"
-	"github.com/micro/go-micro/cmd"
+	"github.com/micro/go-micro/config/cmd"
 	"github.com/micro/go-micro/config/source"
 )
 

config/source/cli/cli_test.go

@@ -6,7 +6,7 @@ import (
 	"testing"
 
 	"github.com/micro/cli"
-	"github.com/micro/go-micro/cmd"
+	"github.com/micro/go-micro/config/cmd"
 	"github.com/micro/go-micro/config/source"
 )
 

config/source/consul/consul.go

@@ -74,6 +74,11 @@ func NewSource(opts ...source.Option) source.Source {
 	// use default config
 	config := api.DefaultConfig()
 
+	// use the consul config passed in the options if any
+	if co, ok := options.Context.Value(configKey{}).(*api.Config); ok {
+		config = co
+	}
+
 	// check if there are any addrs
 	a, ok := options.Context.Value(addressKey{}).(string)
 	if ok {

config/source/consul/options.go

@@ -3,6 +3,7 @@ package consul
 import (
 	"context"
 
+	"github.com/hashicorp/consul/api"
 	"github.com/micro/go-micro/config/source"
 )
 
@@ -11,6 +12,7 @@ type prefixKey struct{}
 type stripPrefixKey struct{}
 type dcKey struct{}
 type tokenKey struct{}
+type configKey struct{}
 
 // WithAddress sets the consul address
 func WithAddress(a string) source.Option {
@@ -61,3 +63,13 @@ func WithToken(p string) source.Option {
 		o.Context = context.WithValue(o.Context, tokenKey{}, p)
 	}
 }
+
+// WithConfig set consul-specific options
+func WithConfig(c *api.Config) source.Option {
+	return func(o *source.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, configKey{}, c)
+	}
+}

config/source/consul/util.go

@@ -8,40 +8,80 @@ import (
 	"github.com/micro/go-micro/config/encoder"
 )
 
+type configValue interface {
+	Value() interface{}
+	Decode(encoder.Encoder, []byte) error
+}
+type configArrayValue struct {
+	v []interface{}
+}
+
+func (a *configArrayValue) Value() interface{} { return a.v }
+func (a *configArrayValue) Decode(e encoder.Encoder, b []byte) error {
+	return e.Decode(b, &a.v)
+}
+
+type configMapValue struct {
+	v map[string]interface{}
+}
+
+func (m *configMapValue) Value() interface{} { return m.v }
+func (m *configMapValue) Decode(e encoder.Encoder, b []byte) error {
+	return e.Decode(b, &m.v)
+}
+
 func makeMap(e encoder.Encoder, kv api.KVPairs, stripPrefix string) (map[string]interface{}, error) {
+
 	data := make(map[string]interface{})
 
 	// consul guarantees lexicographic order, so no need to sort
 	for _, v := range kv {
-		pathString := strings.TrimPrefix(strings.TrimPrefix(v.Key, stripPrefix), "/")
+		pathString := strings.TrimPrefix(strings.TrimPrefix(v.Key, strings.TrimPrefix(stripPrefix, "/")), "/")
-		var val map[string]interface{}
+		if pathString == "" {
+			continue
+		}
+		var val configValue
+		var err error
 
 		// ensure a valid value is stored at this location
 		if len(v.Value) > 0 {
-			if err := e.Decode(v.Value, &val); err != nil {
+			// try to decode into map value or array value
+			arrayV := &configArrayValue{v: []interface{}{}}
+			mapV := &configMapValue{v: map[string]interface{}{}}
+			switch {
+			case arrayV.Decode(e, v.Value) == nil:
+				val = arrayV
+			case mapV.Decode(e, v.Value) == nil:
+				val = mapV
+			default:
 				return nil, fmt.Errorf("faild decode value. path: %s, error: %s", pathString, err)
 			}
 		}
 
 		// set target at the root
 		target := data
-
-		// then descend to the target location, creating as we go, if need be
-		if pathString != "" {
 		path := strings.Split(pathString, "/")
-			// find (or create) the location we want to put this value at
+		// find (or create) the leaf node we want to put this value at
-			for _, dir := range path {
+		for _, dir := range path[:len(path)-1] {
 			if _, ok := target[dir]; !ok {
 				target[dir] = make(map[string]interface{})
 			}
 			target = target[dir].(map[string]interface{})
 		}
 
-		}
+		leafDir := path[len(path)-1]
 
 		// copy over the keys from the value
-		for k := range val {
+		switch val.(type) {
-			target[k] = val[k]
+		case *configArrayValue:
+			target[leafDir] = val.Value()
+		case *configMapValue:
+			target[leafDir] = make(map[string]interface{})
+			target = target[leafDir].(map[string]interface{})
+			mapv := val.Value().(map[string]interface{})
+			for k := range mapv {
+				target[k] = mapv[k]
+			}
 		}
 	}
 

config/source/memory/README.md

@@ -27,7 +27,7 @@ Specify source with data
 
 ```go
 memorySource := memory.NewSource(
-	memory.WithData(data),
+	memory.WithJSON(data),
 )
 ```
 

data/data.go

@@ -0,0 +1,2 @@
+// Package data is an interface for data access
+package data

data/store/consul/consul.go

@@ -7,7 +7,7 @@ import (
 
 	"github.com/hashicorp/consul/api"
 	"github.com/micro/go-micro/config/options"
-	"github.com/micro/go-micro/store"
+	"github.com/micro/go-micro/data/store"
 )
 
 type ckv struct {

data/store/memory/memory.go

@@ -6,7 +6,7 @@ import (
 	"time"
 
 	"github.com/micro/go-micro/config/options"
-	"github.com/micro/go-micro/store"
+	"github.com/micro/go-micro/data/store"
 )
 
 type memoryStore struct {
@@ -32,10 +32,16 @@ func (m *memoryStore) Dump() ([]*store.Record, error) {
 		d := v.r.Expiry
 		t := time.Since(v.c)
 
+		if d > time.Duration(0) {
 			// expired
-		if d > time.Duration(0) && t > d {
+			if t > d {
 				continue
 			}
+			// update expiry
+			v.r.Expiry -= t
+			v.c = time.Now()
+		}
+
 		values = append(values, v.r)
 	}
 
@@ -56,9 +62,14 @@ func (m *memoryStore) Read(key string) (*store.Record, error) {
 	t := time.Since(v.c)
 
 	// expired
-	if d > time.Duration(0) && t > d {
+	if d > time.Duration(0) {
+		if t > d {
 			return nil, store.ErrNotFound
 		}
+		// update expiry
+		v.r.Expiry -= t
+		v.c = time.Now()
+	}
 
 	return v.r, nil
 }

data/store/memory/memory_test.go

@@ -0,0 +1,37 @@
+package memory
+
+import (
+	"testing"
+	"time"
+
+	"github.com/micro/go-micro/data/store"
+)
+
+func TestReadRecordExpire(t *testing.T) {
+	s := NewStore()
+
+	var (
+		key    = "foo"
+		expire = 100 * time.Millisecond
+	)
+	rec := &store.Record{
+		Key:    key,
+		Value:  nil,
+		Expiry: expire,
+	}
+	s.Write(rec)
+
+	rrec, err := s.Read(key)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if rrec.Expiry >= expire {
+		t.Fatal("expiry of read record is not changed")
+	}
+
+	time.Sleep(expire)
+
+	if _, err := s.Read(key); err != store.ErrNotFound {
+		t.Fatal("expire elapsed, but key still accessable")
+	}
+}

debug/handler/debug.go

@@ -0,0 +1,41 @@
+package handler
+
+import (
+	"context"
+	"runtime"
+	"time"
+
+	proto "github.com/micro/go-micro/debug/proto"
+)
+
+type Debug struct {
+	proto.DebugHandler
+	started int64
+}
+
+var (
+	DefaultHandler = newDebug()
+)
+
+func newDebug() *Debug {
+	return &Debug{
+		started: time.Now().Unix(),
+	}
+}
+
+func (d *Debug) Health(ctx context.Context, req *proto.HealthRequest, rsp *proto.HealthResponse) error {
+	rsp.Status = "ok"
+	return nil
+}
+
+func (d *Debug) Stats(ctx context.Context, req *proto.StatsRequest, rsp *proto.StatsResponse) error {
+	var mstat runtime.MemStats
+	runtime.ReadMemStats(&mstat)
+
+	rsp.Started = uint64(d.started)
+	rsp.Uptime = uint64(time.Now().Unix() - d.started)
+	rsp.Memory = mstat.Alloc
+	rsp.Gc = mstat.PauseTotalNs
+	rsp.Threads = uint64(runtime.NumGoroutine())
+	return nil
+}

debug/proto/debug.micro.go

@@ -0,0 +1,108 @@
+// Code generated by protoc-gen-micro. DO NOT EDIT.
+// source: micro/go-micro/debug/proto/debug.proto
+
+package debug
+
+import (
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	math "math"
+)
+
+import (
+	context "context"
+	client "github.com/micro/go-micro/client"
+	server "github.com/micro/go-micro/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 _ context.Context
+var _ client.Option
+var _ server.Option
+
+// Client API for Debug service
+
+type DebugService interface {
+	Health(ctx context.Context, in *HealthRequest, opts ...client.CallOption) (*HealthResponse, error)
+	Stats(ctx context.Context, in *StatsRequest, opts ...client.CallOption) (*StatsResponse, error)
+}
+
+type debugService struct {
+	c    client.Client
+	name string
+}
+
+func NewDebugService(name string, c client.Client) DebugService {
+	if c == nil {
+		c = client.NewClient()
+	}
+	if len(name) == 0 {
+		name = "debug"
+	}
+	return &debugService{
+		c:    c,
+		name: name,
+	}
+}
+
+func (c *debugService) Health(ctx context.Context, in *HealthRequest, opts ...client.CallOption) (*HealthResponse, error) {
+	req := c.c.NewRequest(c.name, "Debug.Health", in)
+	out := new(HealthResponse)
+	err := c.c.Call(ctx, req, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *debugService) Stats(ctx context.Context, in *StatsRequest, opts ...client.CallOption) (*StatsResponse, error) {
+	req := c.c.NewRequest(c.name, "Debug.Stats", in)
+	out := new(StatsResponse)
+	err := c.c.Call(ctx, req, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// Server API for Debug service
+
+type DebugHandler interface {
+	Health(context.Context, *HealthRequest, *HealthResponse) error
+	Stats(context.Context, *StatsRequest, *StatsResponse) error
+}
+
+func RegisterDebugHandler(s server.Server, hdlr DebugHandler, opts ...server.HandlerOption) error {
+	type debug interface {
+		Health(ctx context.Context, in *HealthRequest, out *HealthResponse) error
+		Stats(ctx context.Context, in *StatsRequest, out *StatsResponse) error
+	}
+	type Debug struct {
+		debug
+	}
+	h := &debugHandler{hdlr}
+	return s.Handle(s.NewHandler(&Debug{h}, opts...))
+}
+
+type debugHandler struct {
+	DebugHandler
+}
+
+func (h *debugHandler) Health(ctx context.Context, in *HealthRequest, out *HealthResponse) error {
+	return h.DebugHandler.Health(ctx, in, out)
+}
+
+func (h *debugHandler) Stats(ctx context.Context, in *StatsRequest, out *StatsResponse) error {
+	return h.DebugHandler.Stats(ctx, in, out)
+}

debug/proto/debug.pb.go

@@ -0,0 +1,336 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: micro/go-micro/debug/proto/debug.proto
+
+package debug
+
+import (
+	context "context"
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	grpc "google.golang.org/grpc"
+	math "math"
+)
+
+// 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
+
+type HealthRequest struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *HealthRequest) Reset()         { *m = HealthRequest{} }
+func (m *HealthRequest) String() string { return proto.CompactTextString(m) }
+func (*HealthRequest) ProtoMessage()    {}
+func (*HealthRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_f25415e61bccfa1f, []int{0}
+}
+
+func (m *HealthRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_HealthRequest.Unmarshal(m, b)
+}
+func (m *HealthRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_HealthRequest.Marshal(b, m, deterministic)
+}
+func (m *HealthRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_HealthRequest.Merge(m, src)
+}
+func (m *HealthRequest) XXX_Size() int {
+	return xxx_messageInfo_HealthRequest.Size(m)
+}
+func (m *HealthRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_HealthRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_HealthRequest proto.InternalMessageInfo
+
+type HealthResponse struct {
+	// default: ok
+	Status               string   `protobuf:"bytes,1,opt,name=status,proto3" json:"status,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *HealthResponse) Reset()         { *m = HealthResponse{} }
+func (m *HealthResponse) String() string { return proto.CompactTextString(m) }
+func (*HealthResponse) ProtoMessage()    {}
+func (*HealthResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_f25415e61bccfa1f, []int{1}
+}
+
+func (m *HealthResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_HealthResponse.Unmarshal(m, b)
+}
+func (m *HealthResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_HealthResponse.Marshal(b, m, deterministic)
+}
+func (m *HealthResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_HealthResponse.Merge(m, src)
+}
+func (m *HealthResponse) XXX_Size() int {
+	return xxx_messageInfo_HealthResponse.Size(m)
+}
+func (m *HealthResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_HealthResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_HealthResponse proto.InternalMessageInfo
+
+func (m *HealthResponse) GetStatus() string {
+	if m != nil {
+		return m.Status
+	}
+	return ""
+}
+
+type StatsRequest struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *StatsRequest) Reset()         { *m = StatsRequest{} }
+func (m *StatsRequest) String() string { return proto.CompactTextString(m) }
+func (*StatsRequest) ProtoMessage()    {}
+func (*StatsRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_f25415e61bccfa1f, []int{2}
+}
+
+func (m *StatsRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_StatsRequest.Unmarshal(m, b)
+}
+func (m *StatsRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_StatsRequest.Marshal(b, m, deterministic)
+}
+func (m *StatsRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_StatsRequest.Merge(m, src)
+}
+func (m *StatsRequest) XXX_Size() int {
+	return xxx_messageInfo_StatsRequest.Size(m)
+}
+func (m *StatsRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_StatsRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_StatsRequest proto.InternalMessageInfo
+
+type StatsResponse struct {
+	// unix timestamp
+	Started uint64 `protobuf:"varint,1,opt,name=started,proto3" json:"started,omitempty"`
+	// in seconds
+	Uptime uint64 `protobuf:"varint,2,opt,name=uptime,proto3" json:"uptime,omitempty"`
+	// in bytes
+	Memory uint64 `protobuf:"varint,3,opt,name=memory,proto3" json:"memory,omitempty"`
+	// num threads
+	Threads uint64 `protobuf:"varint,4,opt,name=threads,proto3" json:"threads,omitempty"`
+	// total gc in nanoseconds
+	Gc                   uint64   `protobuf:"varint,5,opt,name=gc,proto3" json:"gc,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *StatsResponse) Reset()         { *m = StatsResponse{} }
+func (m *StatsResponse) String() string { return proto.CompactTextString(m) }
+func (*StatsResponse) ProtoMessage()    {}
+func (*StatsResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_f25415e61bccfa1f, []int{3}
+}
+
+func (m *StatsResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_StatsResponse.Unmarshal(m, b)
+}
+func (m *StatsResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_StatsResponse.Marshal(b, m, deterministic)
+}
+func (m *StatsResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_StatsResponse.Merge(m, src)
+}
+func (m *StatsResponse) XXX_Size() int {
+	return xxx_messageInfo_StatsResponse.Size(m)
+}
+func (m *StatsResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_StatsResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_StatsResponse proto.InternalMessageInfo
+
+func (m *StatsResponse) GetStarted() uint64 {
+	if m != nil {
+		return m.Started
+	}
+	return 0
+}
+
+func (m *StatsResponse) GetUptime() uint64 {
+	if m != nil {
+		return m.Uptime
+	}
+	return 0
+}
+
+func (m *StatsResponse) GetMemory() uint64 {
+	if m != nil {
+		return m.Memory
+	}
+	return 0
+}
+
+func (m *StatsResponse) GetThreads() uint64 {
+	if m != nil {
+		return m.Threads
+	}
+	return 0
+}
+
+func (m *StatsResponse) GetGc() uint64 {
+	if m != nil {
+		return m.Gc
+	}
+	return 0
+}
+
+func init() {
+	proto.RegisterType((*HealthRequest)(nil), "HealthRequest")
+	proto.RegisterType((*HealthResponse)(nil), "HealthResponse")
+	proto.RegisterType((*StatsRequest)(nil), "StatsRequest")
+	proto.RegisterType((*StatsResponse)(nil), "StatsResponse")
+}
+
+func init() {
+	proto.RegisterFile("micro/go-micro/debug/proto/debug.proto", fileDescriptor_f25415e61bccfa1f)
+}
+
+var fileDescriptor_f25415e61bccfa1f = []byte{
+	// 230 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x54, 0x90, 0x41, 0x4b, 0xc4, 0x30,
+	0x10, 0x85, 0xb7, 0x75, 0x5b, 0x71, 0xb0, 0x59, 0xc8, 0x41, 0xc2, 0x9e, 0x24, 0x07, 0x29, 0x88,
+	0x59, 0xd0, 0xbf, 0xe0, 0xc1, 0x73, 0xbd, 0x0b, 0xd9, 0x76, 0xe8, 0x16, 0xac, 0xa9, 0x99, 0xe9,
+	0xc1, 0xb3, 0x7f, 0x5c, 0x9a, 0xa4, 0x60, 0x6f, 0xef, 0xbd, 0xf0, 0x1e, 0xf9, 0x06, 0x1e, 0xc6,
+	0xa1, 0xf5, 0xee, 0xd4, 0xbb, 0xa7, 0x28, 0x3a, 0x3c, 0xcf, 0xfd, 0x69, 0xf2, 0x8e, 0x93, 0x36,
+	0x41, 0xeb, 0x03, 0x54, 0x6f, 0x68, 0x3f, 0xf9, 0xd2, 0xe0, 0xf7, 0x8c, 0xc4, 0xba, 0x06, 0xb1,
+	0x06, 0x34, 0xb9, 0x2f, 0x42, 0x79, 0x07, 0x25, 0xb1, 0xe5, 0x99, 0x54, 0x76, 0x9f, 0xd5, 0x37,
+	0x4d, 0x72, 0x5a, 0xc0, 0xed, 0x3b, 0x5b, 0xa6, 0xb5, 0xf9, 0x9b, 0x41, 0x95, 0x82, 0xd4, 0x54,
+	0x70, 0x4d, 0x6c, 0x3d, 0x63, 0x17, 0xaa, 0xfb, 0x66, 0xb5, 0xcb, 0xe6, 0x3c, 0xf1, 0x30, 0xa2,
+	0xca, 0xc3, 0x43, 0x72, 0x4b, 0x3e, 0xe2, 0xe8, 0xfc, 0x8f, 0xba, 0x8a, 0x79, 0x74, 0xcb, 0x12,
+	0x5f, 0x3c, 0xda, 0x8e, 0xd4, 0x3e, 0x2e, 0x25, 0x2b, 0x05, 0xe4, 0x7d, 0xab, 0x8a, 0x10, 0xe6,
+	0x7d, 0xfb, 0xfc, 0x01, 0xc5, 0xeb, 0xc2, 0x27, 0x1f, 0xa1, 0x8c, 0x20, 0x52, 0x98, 0x0d, 0xe2,
+	0xf1, 0x60, 0xb6, 0x84, 0x7a, 0x27, 0x6b, 0x28, 0xc2, 0xd7, 0x65, 0x65, 0xfe, 0x33, 0x1d, 0x85,
+	0xd9, 0x10, 0xe9, 0xdd, 0xb9, 0x0c, 0x77, 0x7b, 0xf9, 0x0b, 0x00, 0x00, 0xff, 0xff, 0xfe, 0xb9,
+	0x5f, 0xf7, 0x61, 0x01, 0x00, 0x00,
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// 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.SupportPackageIsVersion4
+
+// DebugClient is the client API for Debug service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type DebugClient interface {
+	Health(ctx context.Context, in *HealthRequest, opts ...grpc.CallOption) (*HealthResponse, error)
+	Stats(ctx context.Context, in *StatsRequest, opts ...grpc.CallOption) (*StatsResponse, error)
+}
+
+type debugClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewDebugClient(cc *grpc.ClientConn) DebugClient {
+	return &debugClient{cc}
+}
+
+func (c *debugClient) Health(ctx context.Context, in *HealthRequest, opts ...grpc.CallOption) (*HealthResponse, error) {
+	out := new(HealthResponse)
+	err := c.cc.Invoke(ctx, "/Debug/Health", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *debugClient) Stats(ctx context.Context, in *StatsRequest, opts ...grpc.CallOption) (*StatsResponse, error) {
+	out := new(StatsResponse)
+	err := c.cc.Invoke(ctx, "/Debug/Stats", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// DebugServer is the server API for Debug service.
+type DebugServer interface {
+	Health(context.Context, *HealthRequest) (*HealthResponse, error)
+	Stats(context.Context, *StatsRequest) (*StatsResponse, error)
+}
+
+func RegisterDebugServer(s *grpc.Server, srv DebugServer) {
+	s.RegisterService(&_Debug_serviceDesc, srv)
+}
+
+func _Debug_Health_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(HealthRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(DebugServer).Health(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/Debug/Health",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(DebugServer).Health(ctx, req.(*HealthRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Debug_Stats_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(StatsRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(DebugServer).Stats(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/Debug/Stats",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(DebugServer).Stats(ctx, req.(*StatsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _Debug_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "Debug",
+	HandlerType: (*DebugServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "Health",
+			Handler:    _Debug_Health_Handler,
+		},
+		{
+			MethodName: "Stats",
+			Handler:    _Debug_Stats_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "micro/go-micro/debug/proto/debug.proto",
+}

debug/proto/debug.proto

@@ -1,13 +1,9 @@
 syntax = "proto3";
 
-// This is commented out due to import cycles.
+service Debug {
-// But its what we expect the RPC service to 
+ 	rpc Health(HealthRequest) returns (HealthResponse) {}
-// return.
+ 	rpc Stats(StatsRequest) returns (StatsResponse) {}
-//
+}
-// service Debug {
-// 	rpc Health(HealthRequest) returns (HealthResponse) {}
-// 	rpc Stats(StatsRequest) returns (StatsResponse) {}
-// }
 
 message HealthRequest {
 }

function_test.go

@@ -5,8 +5,8 @@ import (
 	"sync"
 	"testing"
 
+	proto "github.com/micro/go-micro/debug/proto"
 	"github.com/micro/go-micro/registry/memory"
-	proto "github.com/micro/go-micro/server/debug/proto"
 )
 
 func TestFunction(t *testing.T) {

go.mod

@@ -3,42 +3,78 @@ module github.com/micro/go-micro
 go 1.12
 
 require (
+	cloud.google.com/go v0.43.0 // indirect
 	github.com/BurntSushi/toml v0.3.1
+	github.com/Microsoft/go-winio v0.4.14 // indirect
+	github.com/armon/circbuf v0.0.0-20190214190532-5111143e8da2 // indirect
+	github.com/armon/go-metrics v0.0.0-20190430140413-ec5e00d3c878 // indirect
+	github.com/armon/go-radix v1.0.0 // indirect
 	github.com/beevik/ntp v0.2.0
 	github.com/bitly/go-simplejson v0.5.0
 	github.com/bwmarrin/discordgo v0.19.0
+	github.com/containerd/continuity v0.0.0-20190426062206-aaeac12a7ffc // indirect
 	github.com/forestgiant/sliceutil v0.0.0-20160425183142-94783f95db6c
 	github.com/fsnotify/fsnotify v1.4.7
-	github.com/fsouza/go-dockerclient v1.4.1
+	github.com/fsouza/go-dockerclient v1.4.2
 	github.com/ghodss/yaml v1.0.0
+	github.com/go-kit/kit v0.9.0 // indirect
 	github.com/go-log/log v0.1.0
 	github.com/go-playground/locales v0.12.1 // indirect
 	github.com/go-playground/universal-translator v0.16.0 // indirect
-	github.com/golang/protobuf v1.3.1
+	github.com/golang/protobuf v1.3.2
+	github.com/google/pprof v0.0.0-20190723021845-34ac40c74b70 // indirect
 	github.com/google/uuid v1.1.1
-	github.com/gorilla/handlers v1.4.0
+	github.com/gorilla/handlers v1.4.2
 	github.com/gorilla/websocket v1.4.0
 	github.com/hashicorp/consul/api v1.1.0
+	github.com/hashicorp/go-immutable-radix v1.1.0 // indirect
+	github.com/hashicorp/go-msgpack v0.5.5 // indirect
+	github.com/hashicorp/go-retryablehttp v0.5.4 // indirect
+	github.com/hashicorp/go-rootcerts v1.0.1 // indirect
+	github.com/hashicorp/go-sockaddr v1.0.2 // indirect
+	github.com/hashicorp/go-version v1.2.0 // indirect
+	github.com/hashicorp/golang-lru v0.5.3 // indirect
 	github.com/hashicorp/hcl v1.0.0
+	github.com/hashicorp/mdns v1.0.1 // indirect
 	github.com/hashicorp/memberlist v0.1.4
+	github.com/hashicorp/serf v0.8.3 // indirect
 	github.com/imdario/mergo v0.3.7
 	github.com/joncalhoun/qson v0.0.0-20170526102502-8a9cab3a62b1
-	github.com/json-iterator/go v1.1.6
+	github.com/json-iterator/go v1.1.7
+	github.com/kisielk/errcheck v1.2.0 // indirect
+	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
 	github.com/leodido/go-urn v1.1.0 // indirect
-	github.com/lucas-clemente/quic-go v0.11.2
+	github.com/lucas-clemente/quic-go v0.12.0
+	github.com/mattn/go-colorable v0.1.2 // indirect
+	github.com/mattn/go-runewidth v0.0.4 // indirect
 	github.com/micro/cli v0.2.0
-	github.com/micro/mdns v0.1.0
+	github.com/micro/mdns v0.2.0
+	github.com/miekg/dns v1.1.15 // indirect
+	github.com/mitchellh/gox v1.0.1 // indirect
 	github.com/mitchellh/hashstructure v1.0.0
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.1 // indirect
+	github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f // indirect
 	github.com/nats-io/nats.go v1.8.1
+	github.com/nats-io/nkeys v0.1.0 // indirect
 	github.com/nlopes/slack v0.5.0
+	github.com/olekukonko/tablewriter v0.0.1
+	github.com/onsi/ginkgo v1.8.0 // indirect
+	github.com/onsi/gomega v1.5.0 // indirect
 	github.com/pkg/errors v0.8.1
+	github.com/posener/complete v1.2.1 // indirect
+	github.com/prometheus/client_golang v1.1.0 // indirect
+	github.com/sirupsen/logrus v1.4.2 // indirect
 	github.com/technoweenie/multipartstreamer v1.0.1 // indirect
-	golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5
+	golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4
-	golang.org/x/net v0.0.0-20190607181551-461777fb6f67
+	golang.org/x/mobile v0.0.0-20190806162312-597adff16ade // indirect
-	google.golang.org/grpc v1.21.1
+	golang.org/x/net v0.0.0-20190724013045-ca1201d0de80
-	gopkg.in/go-playground/validator.v9 v9.29.0
+	golang.org/x/sys v0.0.0-20190804053845-51ab0e2deafa // indirect
-	gopkg.in/src-d/go-git.v4 v4.11.0
+	golang.org/x/tools v0.0.0-20190807201305-8be58fba6352 // indirect
+	google.golang.org/genproto v0.0.0-20190801165951-fa694d86fc64 // indirect
+	google.golang.org/grpc v1.22.1
+	gopkg.in/go-playground/validator.v9 v9.29.1
+	gopkg.in/src-d/go-git.v4 v4.13.1
 	gopkg.in/telegram-bot-api.v4 v4.6.4
+	honnef.co/go/tools v0.0.1-2019.2.2 // indirect
 )

go.sum

@@ -1,16 +1,38 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.40.0/go.mod h1:Tk58MuI9rbLMKlAjeO/bDnteAx7tX2gJIXw4T5Jwlro=
+cloud.google.com/go v0.41.0/go.mod h1:OauMR7DV8fzvZIl2qg6rkaIhD/vmgk4iwEw/h6ercmg=
+cloud.google.com/go v0.43.0/go.mod h1:BOSR3VbTLkk6FDC/TcffxP4NF/FFBGA5ku+jvKOP7pg=
 github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
+github.com/DataDog/datadog-go v2.2.0+incompatible/go.mod h1:LButxg5PwREeZtORoXG3tL4fMGNddJ+vMq1mwgfaqoQ=
 github.com/Microsoft/go-winio v0.4.12/go.mod h1:VhR8bwka0BXejwEJY73c50VrPtXAaKcyvVC4A4RozmA=
+github.com/Microsoft/go-winio v0.4.13/go.mod h1:qXqCSQ3Xa7+6tgxaGTIe4Kpcdsi+P8jBhyzoq1bpyYA=
+github.com/Microsoft/go-winio v0.4.14/go.mod h1:qXqCSQ3Xa7+6tgxaGTIe4Kpcdsi+P8jBhyzoq1bpyYA=
+github.com/Microsoft/hcsshim v0.8.6/go.mod h1:Op3hHsoHPAvb6lceZHDtd9OkTew38wNoXnJs8iY7rUg=
 github.com/alcortesm/tgz v0.0.0-20161220082320-9c5fe88206d7/go.mod h1:6zEj6s6u/ghQa61ZWa/C2Aw3RkjiTBOix7dkqa1VLIs=
+github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
 github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
+github.com/armon/circbuf v0.0.0-20190214190532-5111143e8da2/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
 github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da h1:8GUt8eRujhVEGZFFEjBj46YV4rDjvGrNxb0KMWYkL2I=
 github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
+github.com/armon/go-metrics v0.0.0-20190430140413-ec5e00d3c878 h1:EFSB7Zo9Eg91v7MJPVsifUysc/wPdN+NOnVe6bWbdBM=
+github.com/armon/go-metrics v0.0.0-20190430140413-ec5e00d3c878/go.mod h1:3AMJUQhVx52RsWOnlkpikZr01T/yAVN2gn0861vByNg=
 github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
+github.com/armon/go-radix v1.0.0/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
+github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5/go.mod h1:wHh0iHkYZB8zMSxRWpUBQtwG5a7fFgvEO+odwuTv2gs=
 github.com/beevik/ntp v0.2.0 h1:sGsd+kAXzT0bfVfzJfce04g+dSRfrs+tbQW8lweuYgw=
 github.com/beevik/ntp v0.2.0/go.mod h1:hIHWr+l3+/clUnF44zdK+CWW7fO8dR5cIylAQ76NRpg=
+github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
+github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
+github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
 github.com/bitly/go-simplejson v0.5.0 h1:6IH+V8/tVMab511d5bn4M7EwGXZf9Hj6i2xSwkNEM+Y=
 github.com/bitly/go-simplejson v0.5.0/go.mod h1:cXHtHw4XUPsvGaxgjIAn8PhEWG9NfngEKAMDJEczWVA=
@@ -18,19 +40,30 @@ github.com/bwmarrin/discordgo v0.19.0 h1:kMED/DB0NR1QhRcalb85w0Cu3Ep2OrGAqZH1R5a
 github.com/bwmarrin/discordgo v0.19.0/go.mod h1:O9S4p+ofTFwB02em7jkpkV8M3R0/PUVOwN61zSZ0r4Q=
 github.com/cheekybits/genny v1.0.0 h1:uGGa4nei+j20rOSeDeP5Of12XVm7TGUd4dJA9RDitfE=
 github.com/cheekybits/genny v1.0.0/go.mod h1:+tQajlRqAUrPI7DOSpB0XAqZYtQakVtB7wXkRAgjxjQ=
+github.com/circonus-labs/circonus-gometrics v2.3.1+incompatible/go.mod h1:nmEj6Dob7S7YxXgwXpfOuvO54S+tGdZdw9fuRZt25Ag=
+github.com/circonus-labs/circonusllhist v0.1.3/go.mod h1:kMXHVDlOchFAehlya5ePtbp5jckzBHf4XRpQvBOLI+I=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/containerd/continuity v0.0.0-20181203112020-004b46473808 h1:4BX8f882bXEDKfWIf0wa8HRvpnBoPszJJXL+TVbBw4M=
 github.com/containerd/continuity v0.0.0-20181203112020-004b46473808/go.mod h1:GL3xCUCBDV3CZiTSEKksMWbLE66hEyuu9qyDOOqM47Y=
+github.com/containerd/continuity v0.0.0-20190426062206-aaeac12a7ffc h1:TP+534wVlf61smEIq1nwLLAjQVEK2EADoW3CX9AuT+8=
+github.com/containerd/continuity v0.0.0-20190426062206-aaeac12a7ffc/go.mod h1:GL3xCUCBDV3CZiTSEKksMWbLE66hEyuu9qyDOOqM47Y=
+github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/docker/distribution v2.7.1+incompatible h1:a5mlkVzth6W5A4fOsS3D2EO5BUmsJpcB+cRlLU7cSug=
+github.com/docker/distribution v2.7.1+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w=
 github.com/docker/docker v0.7.3-0.20190309235953-33c3200e0d16 h1:dmUn0SuGx7unKFwxyeQ/oLUHhEfZosEDrpmYM+6MTuc=
 github.com/docker/docker v0.7.3-0.20190309235953-33c3200e0d16/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
+github.com/docker/docker v1.4.2-0.20190710153559-aa8249ae1b8b h1:+Ga+YpCDpcY1fln6GI0fiiirpqHGcob5/Vk3oKNuGdU=
+github.com/docker/docker v1.4.2-0.20190710153559-aa8249ae1b8b/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
 github.com/docker/go-connections v0.4.0 h1:El9xVISelRB7BuFusrZozjnkIM5YnzCViNKohAFqRJQ=
 github.com/docker/go-connections v0.4.0/go.mod h1:Gbd7IOopHjR8Iph03tsViu4nIes5XhDvyHbTtUxmeec=
 github.com/docker/go-units v0.4.0 h1:3uh0PgVws3nIA0Q+MwDC8yjEPf9zjRfZZWXZYDct3Tw=
 github.com/docker/go-units v0.4.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
 github.com/emirpasic/gods v1.9.0 h1:rUF4PuzEjMChMiNsVjdI+SyLu7rEqpQ5reNFnhC7oFo=
 github.com/emirpasic/gods v1.9.0/go.mod h1:YfzfFFoVP/catgzJb4IKIqXjX78Ha8FMSDh3ymbK86o=
+github.com/emirpasic/gods v1.12.0 h1:QAUIPSaCu4G+POclxeqb3F+WPpdKqFGlw36+yOzGlrg=
+github.com/emirpasic/gods v1.12.0/go.mod h1:YfzfFFoVP/catgzJb4IKIqXjX78Ha8FMSDh3ymbK86o=
 github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
 github.com/flynn/go-shlex v0.0.0-20150515145356-3f9db97f8568/go.mod h1:xEzjJPgXI435gkrCt3MPfRiAkVrwSbHsst4LCFVfpJc=
 github.com/forestgiant/sliceutil v0.0.0-20160425183142-94783f95db6c h1:pBgVXWDXju1m8W4lnEeIqTHPOzhTUO81a7yknM/xQR4=
@@ -39,33 +72,61 @@ github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/fsouza/go-dockerclient v1.4.1 h1:W7wuJ3IB48WYZv/UBk9dCTIb9oX805+L9KIm65HcUYs=
 github.com/fsouza/go-dockerclient v1.4.1/go.mod h1:PUNHxbowDqRXfRgZqMz1OeGtbWC6VKyZvJ99hDjB0qs=
+github.com/fsouza/go-dockerclient v1.4.2 h1:dl6GfIWS5Qn4C6OfSnnoe6YuOV8lvKAE8W/YD1Q7udo=
+github.com/fsouza/go-dockerclient v1.4.2/go.mod h1:COunfLZrsdwX/j3YVDAG8gIw3KutrI0x1+vGEJ5zxdI=
 github.com/ghodss/yaml v1.0.0 h1:wQHKEahhL6wmXdzwWG11gIVCkOv05bNOh+Rxn0yngAk=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/gliderlabs/ssh v0.1.1/go.mod h1:U7qILu1NlMHj9FlMhZLlkCdDnU1DBEAqr0aevW3Awn0=
+github.com/gliderlabs/ssh v0.1.3/go.mod h1:U7qILu1NlMHj9FlMhZLlkCdDnU1DBEAqr0aevW3Awn0=
+github.com/gliderlabs/ssh v0.2.2/go.mod h1:U7qILu1NlMHj9FlMhZLlkCdDnU1DBEAqr0aevW3Awn0=
+github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
+github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-log/log v0.1.0 h1:wudGTNsiGzrD5ZjgIkVZ517ugi2XRe9Q/xRCzwEO4/U=
 github.com/go-log/log v0.1.0/go.mod h1:4mBwpdRMFLiuXZDCwU2lKQFsoSCo72j3HqBK9d81N2M=
+github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
+github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
 github.com/go-playground/locales v0.12.1 h1:2FITxuFt/xuCNP1Acdhv62OzaCiviiE4kotfhkmOqEc=
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monitor/default.go

@@ -0,0 +1,311 @@
+package monitor
+
+import (
+	"context"
+	"errors"
+	"sync"
+	"time"
+
+	"github.com/micro/go-micro/client"
+	pb "github.com/micro/go-micro/debug/proto"
+	"github.com/micro/go-micro/registry"
+	"github.com/micro/go-micro/registry/cache"
+)
+
+type monitor struct {
+	options Options
+
+	exit     chan bool
+	registry cache.Cache
+	client   client.Client
+
+	sync.RWMutex
+	running  bool
+	services map[string]*Status
+}
+
+// check provides binary running/failed status.
+// In the event Debug.Health cannot be called on a service we reap the node.
+func (m *monitor) check(service string) (*Status, error) {
+	services, err := m.registry.GetService(service)
+	if err != nil {
+		return nil, err
+	}
+
+	// create debug client
+	debug := pb.NewDebugService(service, m.client)
+
+	var status *Status
+	var gerr error
+
+	// iterate through multiple versions of a service
+	for _, service := range services {
+		for _, node := range service.Nodes {
+			rsp, err := debug.Health(
+				context.Background(),
+				// empty health request
+				&pb.HealthRequest{},
+				// call this specific node
+				client.WithAddress(node.Address),
+				// retry in the event of failure
+				client.WithRetries(3),
+			)
+			if err != nil {
+				// reap the dead node
+				m.registry.Deregister(&registry.Service{
+					Name:    service.Name,
+					Version: service.Version,
+					Nodes:   []*registry.Node{node},
+				})
+
+				// save the error
+				gerr = err
+				continue
+			}
+
+			// expecting ok response status
+			if rsp.Status != "ok" {
+				gerr = errors.New(rsp.Status)
+				continue
+			}
+
+			// no error set status
+			status = &Status{
+				Code: StatusRunning,
+				Info: "running",
+			}
+		}
+	}
+
+	// if we got the success case return it
+	if status != nil {
+		return status, nil
+	}
+
+	// if gerr is not nil return it
+	if gerr != nil {
+		return &Status{
+			Code:  StatusFailed,
+			Info:  "not running",
+			Error: gerr.Error(),
+		}, nil
+	}
+
+	// otherwise unknown status
+	return &Status{
+		Code: StatusUnknown,
+		Info: "unknown status",
+	}, nil
+}
+
+func (m *monitor) reap() {
+	services, err := m.registry.ListServices()
+	if err != nil {
+		return
+	}
+
+	serviceMap := make(map[string]bool)
+	for _, service := range services {
+		serviceMap[service.Name] = true
+	}
+
+	m.Lock()
+	defer m.Unlock()
+
+	// range over our watched services
+	for service, _ := range m.services {
+		// check if the service exists in the registry
+		if !serviceMap[service] {
+			// if not, delete it in our status map
+			delete(m.services, service)
+		}
+	}
+}
+
+func (m *monitor) run() {
+	// check the status every tick
+	t := time.NewTicker(time.Minute)
+	defer t.Stop()
+
+	// reap dead services
+	t2 := time.NewTicker(time.Hour)
+	defer t2.Stop()
+
+	// list the known services
+	services, _ := m.registry.ListServices()
+
+	// create a check chan of same length
+	check := make(chan string, len(services))
+
+	// front-load the services to watch
+	for _, service := range services {
+		check <- service.Name
+	}
+
+	for {
+		select {
+		// exit if we're told to
+		case <-m.exit:
+			return
+		// check a service when told to
+		case service := <-check:
+			// check the status
+			status, err := m.check(service)
+			if err != nil {
+				status = &Status{
+					Code: StatusUnknown,
+					Info: "unknown status",
+				}
+			}
+
+			// save the status
+			m.Lock()
+			m.services[service] = status
+			m.Unlock()
+		// on the tick interval get all services and issue a check
+		case <-t.C:
+			// create a list of services
+			serviceMap := make(map[string]bool)
+
+			m.RLock()
+			for service, _ := range m.services {
+				serviceMap[service] = true
+			}
+			m.RUnlock()
+
+			go func() {
+				// check the status of all watched services
+				for service, _ := range serviceMap {
+					select {
+					case <-m.exit:
+						return
+					case check <- service:
+					default:
+						// barf if we block
+					}
+				}
+
+				// list services
+				services, _ := m.registry.ListServices()
+
+				for _, service := range services {
+					// start watching the service
+					if ok := serviceMap[service.Name]; !ok {
+						m.Watch(service.Name)
+					}
+				}
+			}()
+		case <-t2.C:
+			// reap any dead/non-existent services
+			m.reap()
+		}
+	}
+}
+
+func (m *monitor) Reap(service string) error {
+	services, err := m.registry.GetService(service)
+	if err != nil {
+		return nil
+	}
+	m.Lock()
+	defer m.Unlock()
+	delete(m.services, service)
+	for _, service := range services {
+		m.registry.Deregister(service)
+	}
+	return nil
+}
+
+func (m *monitor) Status(service string) (Status, error) {
+	m.RLock()
+	defer m.RUnlock()
+	if status, ok := m.services[service]; ok {
+		return *status, nil
+	}
+	return Status{}, ErrNotWatching
+}
+
+func (m *monitor) Watch(service string) error {
+	m.Lock()
+	defer m.Unlock()
+
+	// check if we're watching
+	if _, ok := m.services[service]; ok {
+		return nil
+	}
+
+	// get the status
+	status, err := m.check(service)
+	if err != nil {
+		return err
+	}
+
+	// set the status
+	m.services[service] = status
+	return nil
+}
+
+func (m *monitor) Run() error {
+	m.Lock()
+	defer m.Unlock()
+
+	if m.running {
+		return nil
+	}
+
+	// reset the exit channel
+	m.exit = make(chan bool)
+	// setup a new cache
+	m.registry = cache.New(m.options.Registry)
+
+	// start running
+	go m.run()
+
+	// set to running
+	m.running = true
+
+	return nil
+}
+
+func (m *monitor) Stop() error {
+	m.Lock()
+	defer m.Unlock()
+
+	if !m.running {
+		return nil
+	}
+
+	select {
+	case <-m.exit:
+		return nil
+	default:
+		close(m.exit)
+		for s, _ := range m.services {
+			delete(m.services, s)
+		}
+		m.registry.Stop()
+		m.running = false
+		return nil
+	}
+
+	return nil
+}
+
+func newMonitor(opts ...Option) Monitor {
+	options := Options{
+		Client:   client.DefaultClient,
+		Registry: registry.DefaultRegistry,
+	}
+
+	for _, o := range opts {
+		o(&options)
+	}
+
+	return &monitor{
+		options:  options,
+		exit:     make(chan bool),
+		client:   options.Client,
+		registry: cache.New(options.Registry),
+		services: make(map[string]*Status),
+	}
+}

monitor/default_test.go

@@ -0,0 +1,37 @@
+package monitor
+
+import (
+	"testing"
+)
+
+func TestMonitor(t *testing.T) {
+	// create new monitor
+	m := NewMonitor()
+
+	if err := m.Run(); err != nil {
+		t.Fatalf("failed to stop monitor: %v", err)
+	}
+
+	services := []string{"foo", "bar", "baz"}
+
+	for _, service := range services {
+		_, err := m.Status(service)
+		if err == nil {
+			t.Fatal("expected status error for unknown service")
+		}
+
+		if err := m.Watch(service); err == nil {
+			t.Fatal("expected watch error for unknown service")
+		}
+
+		// TODO:
+		// 1. start a service
+		// 2. watch service
+		// 3. get service status
+	}
+
+	// stop monitor
+	if err := m.Stop(); err != nil {
+		t.Fatalf("failed to stop monitor: %v", err)
+	}
+}

monitor/monitor.go

@@ -0,0 +1,43 @@
+// Package monitor monitors service health
+package monitor
+
+import (
+	"errors"
+)
+
+const (
+	StatusUnknown StatusCode = iota
+	StatusRunning
+	StatusFailed
+)
+
+type StatusCode int
+
+// Monitor monitors a service and reaps dead instances
+type Monitor interface {
+	// Reap a service and stop monitoring
+	Reap(service string) error
+	// Status of the service
+	Status(service string) (Status, error)
+	// Watch starts watching the service
+	Watch(service string) error
+	// Run the monitor to watch all services
+	Run() error
+	// Stop monitoring
+	Stop() error
+}
+
+type Status struct {
+	Code  StatusCode
+	Info  string
+	Error string
+}
+
+var (
+	ErrNotWatching = errors.New("not watching")
+)
+
+// NewMonitor returns a new monitor
+func NewMonitor(opts ...Option) Monitor {
+	return newMonitor(opts...)
+}

monitor/options.go

@@ -0,0 +1,25 @@
+package monitor
+
+import (
+	"github.com/micro/go-micro/client"
+	"github.com/micro/go-micro/registry"
+)
+
+type Options struct {
+	Client   client.Client
+	Registry registry.Registry
+}
+
+type Option func(*Options)
+
+func Client(c client.Client) Option {
+	return func(o *Options) {
+		o.Client = c
+	}
+}
+
+func Registry(r registry.Registry) Option {
+	return func(o *Options) {
+		o.Registry = r
+	}
+}

network/link/default.go

@@ -0,0 +1,288 @@
+// Package link provides a measured transport.Socket link
+package link
+
+import (
+	"io"
+	"sync"
+	"time"
+
+	"github.com/micro/go-micro/config/options"
+	"github.com/micro/go-micro/transport"
+)
+
+type link struct {
+	sync.RWMutex
+
+	// the link id
+	id string
+
+	// the remote end to dial
+	addr string
+
+	// channel used to close the link
+	closed chan bool
+
+	// if its connected
+	connected bool
+
+	// the transport to use
+	transport transport.Transport
+
+	// the send queue to the socket
+	sendQueue chan *transport.Message
+	// the recv queue to the socket
+	recvQueue chan *transport.Message
+
+	// the socket for this link
+	socket transport.Socket
+
+	// determines the cost of the link
+	// based on queue length and roundtrip
+	length int
+	weight int
+}
+
+func newLink(options options.Options) *link {
+	// default values
+	var sock transport.Socket
+	var addr string
+	id := "local"
+	tr := transport.DefaultTransport
+
+	lid, ok := options.Values().Get("link.id")
+	if ok {
+		id = lid.(string)
+	}
+
+	laddr, ok := options.Values().Get("link.address")
+	if ok {
+		addr = laddr.(string)
+	}
+
+	ltr, ok := options.Values().Get("link.transport")
+	if ok {
+		tr = ltr.(transport.Transport)
+	}
+
+	lsock, ok := options.Values().Get("link.socket")
+	if ok {
+		sock = lsock.(transport.Socket)
+	}
+
+	l := &link{
+		// the remote end to dial
+		addr: addr,
+		// transport to dial link
+		transport: tr,
+		// the socket to use
+		// this is nil if not specified
+		socket: sock,
+		// unique id assigned to the link
+		id: id,
+		// the closed channel used to close the conn
+		closed: make(chan bool),
+		// then send queue
+		sendQueue: make(chan *transport.Message, 128),
+		// the receive queue
+		recvQueue: make(chan *transport.Message, 128),
+	}
+
+	// return the link
+	return l
+}
+
+// link methods
+
+// process processes messages on the send and receive queues.
+func (l *link) process() {
+	go func() {
+		for {
+			m := new(transport.Message)
+			if err := l.recv(m); err != nil {
+				return
+			}
+
+			select {
+			case l.recvQueue <- m:
+			case <-l.closed:
+				return
+			}
+		}
+	}()
+
+	// messages sent
+	i := 0
+	length := 0
+
+	for {
+		select {
+		case m := <-l.sendQueue:
+			t := time.Now()
+
+			// send the message
+			if err := l.send(m); err != nil {
+				return
+			}
+
+			// get header size, body size and time taken
+			hl := len(m.Header)
+			bl := len(m.Body)
+			d := time.Since(t)
+
+			// don't calculate on empty messages
+			if hl == 0 && bl == 0 {
+				continue
+			}
+
+			// increment sent
+			i++
+
+			// time take to send some bits and bytes
+			td := float64(hl+bl) / float64(d.Nanoseconds())
+			// increase the scale
+			td += 1
+
+			// judge the length
+			length = int(td) / (length + int(td))
+
+			// every 10 messages update length
+			if (i % 10) == 1 {
+				// cost average the length
+				// save it
+				l.Lock()
+				l.length = length
+				l.Unlock()
+			}
+		case <-l.closed:
+			return
+		}
+	}
+}
+
+// send a message over the link
+func (l *link) send(m *transport.Message) error {
+	// TODO: measure time taken and calculate length/rate
+	// send via the transport socket
+	return l.socket.Send(m)
+}
+
+// recv a message on the link
+func (l *link) recv(m *transport.Message) error {
+	if m.Header == nil {
+		m.Header = make(map[string]string)
+	}
+	// receive the transport message
+	return l.socket.Recv(m)
+}
+
+// Connect attempts to connect to an address and sets the socket
+func (l *link) Connect() error {
+	l.Lock()
+	if l.connected {
+		l.Unlock()
+		return nil
+	}
+	defer l.Unlock()
+
+	// replace closed
+	l.closed = make(chan bool)
+
+	// assume existing socket
+	if len(l.addr) == 0 {
+		go l.process()
+		return nil
+	}
+
+	// dial the endpoint
+	c, err := l.transport.Dial(l.addr)
+	if err != nil {
+		return err
+	}
+
+	// set the socket
+	l.socket = c
+
+	// kick start the processing
+	go l.process()
+
+	return nil
+}
+
+// Close the link
+func (l *link) Close() error {
+	select {
+	case <-l.closed:
+		return nil
+	default:
+		close(l.closed)
+		l.Lock()
+		l.connected = false
+		l.Unlock()
+		return l.socket.Close()
+	}
+}
+
+// returns the node id
+func (l *link) Id() string {
+	l.RLock()
+	defer l.RUnlock()
+	return l.id
+}
+
+// the remote ip of the link
+func (l *link) Remote() string {
+	l.RLock()
+	defer l.RUnlock()
+	return l.socket.Remote()
+}
+
+// the local ip of the link
+func (l *link) Local() string {
+	l.RLock()
+	defer l.RUnlock()
+	return l.socket.Local()
+}
+
+// length/rate of the link
+func (l *link) Length() int {
+	l.RLock()
+	defer l.RUnlock()
+	return l.length
+}
+
+// weight checks the size of the queues
+func (l *link) Weight() int {
+	return len(l.sendQueue) + len(l.recvQueue)
+}
+
+// Accept accepts a message on the socket
+func (l *link) Recv(m *transport.Message) error {
+	select {
+	case <-l.closed:
+		return io.EOF
+	case rm := <-l.recvQueue:
+		*m = *rm
+		return nil
+	}
+	// never reach
+	return nil
+}
+
+// Send sends a message on the socket immediately
+func (l *link) Send(m *transport.Message) error {
+	select {
+	case <-l.closed:
+		return io.EOF
+	case l.sendQueue <- m:
+	}
+	return nil
+}
+
+func (l *link) Status() string {
+	select {
+	case <-l.closed:
+		return "closed"
+	default:
+		return "connected"
+	}
+}

network/link/link.go

@@ -0,0 +1,60 @@
+// Package link provides a measured link on top of a transport.Socket
+package link
+
+import (
+	"errors"
+
+	"github.com/micro/go-micro/config/options"
+	"github.com/micro/go-micro/transport"
+)
+
+// Link is a layer on top of a transport socket with the
+// buffering send and recv queue's with the ability to
+// measure the actual transport link and reconnect if
+// an address is specified.
+type Link interface {
+	// provides the transport.Socket interface
+	transport.Socket
+	// Connect connects the link. It must be called first
+	// if there's an expectation to create a new socket.
+	Connect() error
+	// Id of the link is "local" if not specified
+	Id() string
+	// Status of the link
+	Status() string
+	// Depth of the buffers
+	Weight() int
+	// Rate of the link
+	Length() int
+}
+
+var (
+	ErrLinkClosed = errors.New("link closed")
+)
+
+// NewLink creates a new link on top of a socket
+func NewLink(opts ...options.Option) Link {
+	return newLink(options.NewOptions(opts...))
+}
+
+// Sets the link id which otherwise defaults to "local"
+func Id(id string) options.Option {
+	return options.WithValue("link.id", id)
+}
+
+// The address to use for the link. Connect must be
+// called for this to be used, its otherwise unused.
+func Address(a string) options.Option {
+	return options.WithValue("link.address", a)
+}
+
+// The transport to use for the link where we
+// want to dial the connection first.
+func Transport(t transport.Transport) options.Option {
+	return options.WithValue("link.transport", t)
+}
+
+// Socket sets the socket to use instead of dialing.
+func Socket(s transport.Socket) options.Option {
+	return options.WithValue("link.socket", s)
+}

network/network.go

@@ -1,45 +1,2 @@
-// Package network is an interface for defining a network overlay
+// Package network is for creating internetworks
 package network
-
-import (
-	"github.com/micro/go-micro/config/options"
-)
-
-type Network interface {
-	options.Options
-	// Id of this network
-	Id() string
-	// Connect to the network with id
-	Connect(id string) error
-	// Close the network connection
-	Close() error
-	// Accept messages
-	Accept() (*Message, error)
-	// Send a message
-	Send(*Message) error
-	// Advertise a service on this network
-	Advertise(service string) error
-	// Retrieve list of nodes for a service
-	Nodes(service string) ([]Node, error)
-}
-
-// Node represents a network node
-type Node interface {
-	// Node is a network. Network is a node.
-	Network
-}
-
-// Message is a message sent over the network
-type Message struct {
-	// Headers are the routing headers
-	// e.g Micro-Service, Micro-Endpoint, Micro-Network
-	// see https://github.com/micro/development/blob/master/protocol.md
-	Header map[string]string
-	// Body is the encaspulated payload
-	Body []byte
-}
-
-var (
-	// TODO: set default network
-	DefaultNetwork Network
-)

network/resolver/dns/dns.go

@@ -0,0 +1,30 @@
+// Package dns resolves names to dns srv records
+package dns
+
+import (
+	"fmt"
+	"net"
+
+	"github.com/micro/go-micro/network/resolver"
+)
+
+type Resolver struct{}
+
+// Resolve assumes ID is a domain name e.g micro.mu
+func (r *Resolver) Resolve(name string) ([]*resolver.Record, error) {
+	_, addrs, err := net.LookupSRV("network", "udp", name)
+	if err != nil {
+		return nil, err
+	}
+	var records []*resolver.Record
+	for _, addr := range addrs {
+		address := addr.Target
+		if addr.Port > 0 {
+			address = fmt.Sprintf("%s:%d", addr.Target, addr.Port)
+		}
+		records = append(records, &resolver.Record{
+			Address: address,
+		})
+	}
+	return records, nil
+}

network/resolver/http/http.go

@@ -0,0 +1,59 @@
+// Package http resolves names to network addresses using a http request
+package http
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+
+	"github.com/micro/go-micro/network/resolver"
+)
+
+type Resolver struct {
+	// If not set, defaults to http
+	Proto string
+
+	// Path sets the path to lookup. Defaults to /network
+	Path string
+}
+
+// Resolve assumes ID is a domain which can be converted to a http://name/network request
+func (r *Resolver) Resolve(name string) ([]*resolver.Record, error) {
+	proto := "http"
+	path := "/network"
+
+	if len(r.Proto) > 0 {
+		proto = r.Proto
+	}
+
+	if len(r.Path) > 0 {
+		path = r.Path
+	}
+
+	uri := &url.URL{
+		Scheme: proto,
+		Path:   path,
+		Host:   name,
+	}
+
+	rsp, err := http.Get(uri.String())
+	if err != nil {
+		return nil, err
+	}
+	defer rsp.Body.Close()
+
+	b, err := ioutil.ReadAll(rsp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	// encoding format is assumed to be json
+	var records []*resolver.Record
+
+	if err := json.Unmarshal(b, &records); err != nil {
+		return nil, err
+	}
+
+	return records, nil
+}

network/resolver/registry/registry.go

@@ -0,0 +1,37 @@
+// Package registry resolves names using the go-micro registry
+package registry
+
+import (
+	"github.com/micro/go-micro/network/resolver"
+	"github.com/micro/go-micro/registry"
+)
+
+type Resolver struct {
+	// Registry is the registry to use otherwise we use the defaul
+	Registry registry.Registry
+}
+
+// Resolve assumes ID is a domain name e.g micro.mu
+func (r *Resolver) Resolve(name string) ([]*resolver.Record, error) {
+	reg := r.Registry
+	if reg == nil {
+		reg = registry.DefaultRegistry
+	}
+
+	services, err := reg.GetService(name)
+	if err != nil {
+		return nil, err
+	}
+
+	var records []*resolver.Record
+
+	for _, service := range services {
+		for _, node := range service.Nodes {
+			records = append(records, &resolver.Record{
+				Address: node.Address,
+			})
+		}
+	}
+
+	return records, nil
+}

network/resolver/resolver.go

@@ -0,0 +1,15 @@
+// Package resolver resolves network names to addresses
+package resolver
+
+// Resolver is network resolver. It's used to find network nodes
+// via the name to connect to. This is done based on Network.Name().
+// Before we can be part of any network, we have to connect to it.
+type Resolver interface {
+	// Resolve returns a list of addresses for an name
+	Resolve(name string) ([]*Record, error)
+}
+
+// A resolved record
+type Record struct {
+	Address string `json:"address"`
+}

network/transport/transport.go

@@ -1,203 +0,0 @@
-// Package transport implements the network as a transport interface
-package transport
-
-import (
-	"context"
-	"time"
-
-	"github.com/micro/go-micro/network"
-	"github.com/micro/go-micro/transport"
-	"github.com/micro/go-micro/util/backoff"
-)
-
-type networkKey struct{}
-
-// Transport is a network transport
-type Transport struct {
-	Network network.Network
-	options transport.Options
-}
-
-// Socket is a transport socket
-type Socket struct {
-	// The service
-	Service string
-
-	// Send via Network.Send(Message)
-	Network network.Network
-
-	// Remote/Local
-	remote, local string
-
-	// the first message if its a listener
-	message *network.Message
-}
-
-// Listener is a transport listener
-type Listener struct {
-	// The local service
-	Service string
-
-	// The network
-	Network network.Network
-}
-
-func (s *Socket) Local() string {
-	return s.local
-}
-
-func (s *Socket) Remote() string {
-	return s.remote
-}
-
-func (s *Socket) Close() error {
-	// TODO: should it close the network?
-	return s.Network.Close()
-}
-
-func (t *Transport) Init(opts ...transport.Option) error {
-	for _, o := range opts {
-		o(&t.options)
-	}
-	return nil
-}
-
-func (t *Transport) Options() transport.Options {
-	return t.options
-}
-
-func (t *Transport) Dial(service string, opts ...transport.DialOption) (transport.Client, error) {
-	// TODO: establish pseudo socket?
-	return &Socket{
-		Service: service,
-		Network: t.Network,
-		remote:  service,
-		// TODO: local
-		local: "local",
-	}, nil
-}
-
-func (t *Transport) Listen(service string, opts ...transport.ListenOption) (transport.Listener, error) {
-	// TODO specify connect id
-	if err := t.Network.Connect("micro.mu"); err != nil {
-		return nil, err
-	}
-
-	// advertise the service
-	if err := t.Network.Advertise(service); err != nil {
-		return nil, err
-	}
-
-	return &Listener{
-		Service: service,
-		Network: t.Network,
-	}, nil
-}
-
-func (t *Transport) String() string {
-	return "network"
-}
-
-func (s *Socket) Send(msg *transport.Message) error {
-	// TODO: set routing headers?
-	return s.Network.Send(&network.Message{
-		Header: msg.Header,
-		Body:   msg.Body,
-	})
-}
-
-func (s *Socket) Recv(msg *transport.Message) error {
-	if msg == nil {
-		msg = new(transport.Message)
-	}
-
-	// return first message
-	if s.message != nil {
-		msg.Header = s.message.Header
-		msg.Body = s.message.Body
-		s.message = nil
-		return nil
-	}
-
-	m, err := s.Network.Accept()
-	if err != nil {
-		return err
-	}
-
-	msg.Header = m.Header
-	msg.Body = m.Body
-	return nil
-}
-
-func (l *Listener) Addr() string {
-	return l.Service
-}
-
-func (l *Listener) Close() error {
-	return l.Network.Close()
-}
-
-func (l *Listener) Accept(fn func(transport.Socket)) error {
-	var i int
-
-	for {
-		msg, err := l.Network.Accept()
-		if err != nil {
-			// increment error counter
-			i++
-
-			// break if lots of error
-			if i > 3 {
-				return err
-			}
-
-			// otherwise continue
-			time.Sleep(backoff.Do(i))
-			continue
-		}
-
-		// reset
-		i = 0
-
-		// execute in go routine
-		go fn(&Socket{
-			Service: l.Service,
-			Network: l.Network,
-			local:   l.Service,
-			// TODO: remote
-			remote:  "remote",
-			message: msg,
-		})
-	}
-}
-
-// NewTransport returns a new network transport. It assumes the network is already connected
-func NewTransport(opts ...transport.Option) transport.Transport {
-	options := transport.Options{
-		Context: context.Background(),
-	}
-
-	for _, o := range opts {
-		o(&options)
-	}
-
-	net, ok := options.Context.Value(networkKey{}).(network.Network)
-	if !ok {
-		net = network.DefaultNetwork
-	}
-
-	return &Transport{
-		options: options,
-		Network: net,
-	}
-}
-
-// WithNetwork passes in the network
-func WithNetwork(n network.Network) transport.Option {
-	return func(o *transport.Options) {
-		if o.Context == nil {
-			o.Context = context.Background()
-		}
-		o.Context = context.WithValue(o.Context, networkKey{}, n)
-	}
-}

options.go

@@ -7,9 +7,9 @@ import (
 	"github.com/micro/cli"
 	"github.com/micro/go-micro/broker"
 	"github.com/micro/go-micro/client"
-	"github.com/micro/go-micro/cmd"
+	"github.com/micro/go-micro/client/selector"
+	"github.com/micro/go-micro/config/cmd"
 	"github.com/micro/go-micro/registry"
-	"github.com/micro/go-micro/selector"
 	"github.com/micro/go-micro/server"
 	"github.com/micro/go-micro/transport"
 )

proxy/README.md

@@ -1,25 +0,0 @@
-# Go Proxy [![License](https://img.shields.io/:license-apache-blue.svg)](https://opensource.org/licenses/Apache-2.0) [![GoDoc](https://godoc.org/github.com/micro/go-proxy?status.svg)](https://godoc.org/github.com/micro/go-proxy)
-
-Go Proxy is a proxy library for Go Micro.
-
-## Overview
-
-Go Micro is a distributed systems framework for client/server communication. It handles the details 
-around discovery, fault tolerance, rpc communication, etc. We may want to leverage this in broader ecosystems 
-which make use of standard http or we may also want to offload a number of requirements to a single proxy.
-
-## Features
-
-- **Transparent Proxy** - Proxy requests to any micro services through a single location. Go Proxy enables 
-you to write Go Micro proxies which handle and forward requests. This is good for incorporating wrappers.
-
-- **Single Backend Router** - Enable the single backend router to proxy directly to your local app. The proxy 
-allows you to set a router which serves your backend service whether its http, grpc, etc.
-
-- **Protocol Aware Handler** - Set a request handler which speaks your app protocol to make outbound requests. 
-Your app may not speak the MUCP protocol so it may be easier to translate internally.
-
-- **Control Planes** - Additionally we support use of control planes to offload many distributed systems concerns.
-  * [x] [Consul](https://www.consul.io/docs/connect/native.html) - Using Connect-Native to provide secure mTLS.
-  * [x] [NATS](https://nats.io/) - Fully leveraging NATS as the control plane and data plane.
-

proxy/grpc/grpc.go

@@ -9,7 +9,6 @@ import (
 	"github.com/micro/go-micro/client"
 	"github.com/micro/go-micro/client/grpc"
 	"github.com/micro/go-micro/codec"
-	"github.com/micro/go-micro/codec/bytes"
 	"github.com/micro/go-micro/config/options"
 	"github.com/micro/go-micro/proxy"
 	"github.com/micro/go-micro/server"
@@ -86,14 +85,8 @@ func (p *Proxy) ServeRequest(ctx context.Context, req server.Request, rsp server
 		}
 	}
 
-	// read initial request
-	body, err := req.Read()
-	if err != nil {
-		return err
-	}
-
 	// create new request with raw bytes body
-	creq := p.Client.NewRequest(service, endpoint, &bytes.Frame{body}, client.WithContentType(req.ContentType()))
+	creq := p.Client.NewRequest(service, endpoint, nil, client.WithContentType(req.ContentType()))
 
 	// create new stream
 	stream, err := p.Client.Stream(ctx, creq, opts...)

proxy/http/http.go

@@ -10,8 +10,8 @@ import (
 	"net/url"
 	"path"
 
-	"github.com/micro/go-micro/errors"
 	"github.com/micro/go-micro/config/options"
+	"github.com/micro/go-micro/errors"
 	"github.com/micro/go-micro/proxy"
 	"github.com/micro/go-micro/server"
 )