yolo commit functioning router code. all credit to the milos gajdos

[WIP] No table package. router/service package introduced

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,
-				Port:    port,
+				Address: l.Addr().String(),
 			},
 		},
 	}

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{}
@@ -173,8 +147,36 @@ func (h *rpcHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		// marshall response
 		rsp, _ = response.Marshal()
 	default:
-		http.Error(w, "Unsupported Content-Type", 400)
-		return
+		// 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

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(string, *Message, ...PublishOption) error
-	Subscribe(string, Handler, ...SubscribeOption) (Subscriber, error)
+	Publish(topic string, m *Message, opts ...PublishOption) error
+	Subscribe(topic string, h Handler, opts ...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
-type Publication interface {
+// Event is given to a subscription handler for processing
+type Event interface {
 	Topic() string
 	Message() *Message
 	Ack() error

broker/common_test.go

@@ -1,4 +1,4 @@
-package memory
+package broker
 
 import (
 	"github.com/micro/go-micro/registry"
@@ -6,7 +6,7 @@ import (
 
 var (
 	// mock data
-	Data = map[string][]*registry.Service{
+	testData = map[string][]*registry.Service{
 		"foo": []*registry.Service{
 			{
 				Name:    "foo",
@@ -14,13 +14,11 @@ var (
 				Nodes: []*registry.Node{
 					{
 						Id:      "foo-1.0.0-123",
-						Address: "localhost",
-						Port:    9999,
+						Address: "localhost:9999",
 					},
 					{
 						Id:      "foo-1.0.0-321",
-						Address: "localhost",
-						Port:    9999,
+						Address: "localhost:9999",
 					},
 				},
 			},
@@ -30,8 +28,7 @@ var (
 				Nodes: []*registry.Node{
 					{
 						Id:      "foo-1.0.1-321",
-						Address: "localhost",
-						Port:    6666,
+						Address: "localhost:6666",
 					},
 				},
 			},
@@ -41,8 +38,7 @@ var (
 				Nodes: []*registry.Node{
 					{
 						Id:      "foo-1.0.3-345",
-						Address: "localhost",
-						Port:    8888,
+						Address: "localhost: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 := strings.Join(parts[:len(parts)-1], ":")
-	port, _ := strconv.Atoi(parts[len(parts)-1])
+	host, port, err = net.SplitHostPort(h.Address())
+	if err != nil {
+		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,
-		Port:    port,
+		Address: mnet.HostPort(addr, port),
 		Metadata: map[string]string{
 			"secure": fmt.Sprintf("%t", secure),
 		},

broker/http_broker_test.go

@@ -14,7 +14,7 @@ import (
 func newTestRegistry() *memory.Registry {
 	r := memory.NewRegistry()
 	m := r.(*memory.Registry)
-	m.Setup()
+	m.Services = testData
 	return m
 }
 
@@ -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()
-	defer m.Unlock()
-
+	m.RLock()
 	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()
-	defer m.Unlock()
-
+	m.RLock()
 	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
 	}
 

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

@@ -0,0 +1,47 @@
+package client
+
+import (
+	"github.com/micro/go-micro/registry"
+)
+
+var (
+	// mock data
+	testData = map[string][]*registry.Service{
+		"foo": []*registry.Service{
+			{
+				Name:    "foo",
+				Version: "1.0.0",
+				Nodes: []*registry.Node{
+					{
+						Id:      "foo-1.0.0-123",
+						Address: "localhost:9999",
+					},
+					{
+						Id:      "foo-1.0.0-321",
+						Address: "localhost:9999",
+					},
+				},
+			},
+			{
+				Name:    "foo",
+				Version: "1.0.1",
+				Nodes: []*registry.Node{
+					{
+						Id:      "foo-1.0.1-321",
+						Address: "localhost:6666",
+					},
+				},
+			},
+			{
+				Name:    "foo",
+				Version: "1.0.3",
+				Nodes: []*registry.Node{
+					{
+						Id:      "foo-1.0.3-345",
+						Address: "localhost:8888",
+					},
+				},
+			},
+		},
+	}
+)

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

@@ -2,22 +2,23 @@
 package grpc
 
 import (
-	"bytes"
 	"context"
 	"crypto/tls"
 	"fmt"
+	"os"
 	"sync"
 	"time"
 
 	"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"
@@ -31,8 +32,9 @@ type grpcClient struct {
 }
 
 func init() {
-	encoding.RegisterCodec(jsonCodec{})
-	encoding.RegisterCodec(bytesCodec{})
+	encoding.RegisterCodec(wrapCodec{jsonCodec{}})
+	encoding.RegisterCodec(wrapCodec{protoCodec{}})
+	encoding.RegisterCodec(wrapCodec{bytesCodec{}})
 }
 
 // secure returns the dial option for whether its a secure or insecure connection
@@ -48,17 +50,29 @@ func (g *grpcClient) secure() grpc.DialOption {
 }
 
 func (g *grpcClient) next(request client.Request, opts client.CallOptions) (selector.Next, error) {
+	service := request.Service()
+
+	// get proxy
+	if prx := os.Getenv("MICRO_PROXY"); len(prx) > 0 {
+		service = prx
+	}
+
+	// get proxy address
+	if prx := os.Getenv("MICRO_PROXY_ADDRESS"); len(prx) > 0 {
+		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
 	}
 
 	// get next nodes from the selector
-	next, err := g.opts.Selector.Select(request.Service(), opts.SelectOptions...)
+	next, err := g.opts.Selector.Select(service, opts.SelectOptions...)
 	if err != nil && err == selector.ErrNotFound {
 		return nil, errors.NotFound("go.micro.client", err.Error())
 	} else if err != nil {
@@ -70,9 +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 {
@@ -99,7 +110,7 @@ func (g *grpcClient) call(ctx context.Context, node *registry.Node, req client.R
 
 	var grr error
 
-	cc, err := g.pool.getConn(address, grpc.WithDefaultCallOptions(grpc.CallCustomCodec(cf)),
+	cc, err := g.pool.getConn(address, grpc.WithDefaultCallOptions(grpc.ForceCodec(cf)),
 		grpc.WithTimeout(opts.DialTimeout), g.secure(),
 		grpc.WithDefaultCallOptions(
 			grpc.MaxCallRecvMsgSize(maxRecvMsgSize),
@@ -116,7 +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.CallContentSubtype(cf.String()))
+		err := cc.Invoke(ctx, methodToGRPC(req.Service(), req.Endpoint()), req.Body(), rsp, grpc.CallContentSubtype(cf.Name()))
 		ch <- microError(err)
 	}()
 
@@ -132,9 +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 {
@@ -164,7 +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.CallCustomCodec(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))
 	}
@@ -175,16 +186,34 @@ 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()), grpc.CallContentSubtype(cf.String()))
+	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{
-		context: ctx,
-		request: req,
-		stream:  st,
-		conn:    cc,
+		context:  ctx,
+		request:  req,
+		response: rsp,
+		stream:   st,
+		conn:     cc,
 	}, nil
 }
 
@@ -210,7 +239,7 @@ func (g *grpcClient) maxSendMsgSizeValue() int {
 	return v.(int)
 }
 
-func (g *grpcClient) newGRPCCodec(contentType string) (grpc.Codec, error) {
+func (g *grpcClient) newGRPCCodec(contentType string) (encoding.Codec, error) {
 	codecs := make(map[string]encoding.Codec)
 	if g.opts.Context != nil {
 		if v := g.opts.Context.Value(codecsKey{}); v != nil {
@@ -260,7 +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 {
@@ -337,9 +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():
@@ -420,10 +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():
@@ -462,8 +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)}
-	if err := cf(b).Write(&codec.Message{Type: codec.Publication}, p.Payload()); err != nil {
+	b := buf.New(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,
-				Port:    port,
+				Address: l.Addr().String(),
 			},
 		},
 	})
@@ -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"
@@ -15,32 +14,28 @@ type grpcRequest struct {
 	contentType string
 	request     interface{}
 	opts        client.RequestOptions
+	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 {
@@ -80,7 +75,7 @@ func (g *grpcRequest) Endpoint() string {
 }
 
 func (g *grpcRequest) Codec() codec.Writer {
-	return nil
+	return g.codec
 }
 
 func (g *grpcRequest) Body() interface{} {

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",
-			pb.HelloRequest{},
-		},
-		{
-			"/helloworld.Greeter/SayHello",
-			"/helloworld.Greeter/SayHello",
-			pb.HelloRequest{},
-		},
-		{
-			"Greeter.SayHello",
-			"Greeter.SayHello",
-			nil,
+			"/Greeter/SayHello",
 		},
 	}
 
 	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

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

client/grpc/stream.go

@@ -12,11 +12,12 @@ import (
 // Implements the streamer interface
 type grpcStream struct {
 	sync.RWMutex
-	err     error
-	conn    *grpc.ClientConn
-	request client.Request
-	stream  grpc.ClientStream
-	context context.Context
+	err      error
+	conn     *grpc.ClientConn
+	stream   grpc.ClientStream
+	request  client.Request
+	response client.Response
+	context  context.Context
 }
 
 func (g *grpcStream) Context() context.Context {
@@ -28,7 +29,7 @@ func (g *grpcStream) Request() client.Request {
 }
 
 func (g *grpcStream) Response() client.Response {
-	return nil
+	return g.response
 }
 
 func (g *grpcStream) Send(msg interface{}) error {

client/mucp/mucp.go

@@ -1,5 +1,5 @@
-// Package rpc provides an rpc client
-package rpc
+// Package mucp provides an mucp client
+package mucp
 
 import (
 	"github.com/micro/go-micro/client"

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 string
+	// Address of remote hosts
+	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
-func WithAddress(a string) CallOption {
+// WithAddress sets the remote addresses to use rather than using service discovery
+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 {
-		r.pool.Lock()
-		r.pool.size = r.opts.PoolSize
-		r.pool.ttl = int64(r.opts.PoolTTL.Seconds())
-		r.pool.Unlock()
+	if size != r.opts.PoolSize || ttl != r.opts.PoolTTL || tr != r.opts.Transport {
+		// close existing pool
+		r.pool.Close()
+		// create new pool
+		r.pool = pool.NewPool(
+			pool.Size(r.opts.PoolSize),
+			pool.TTL(r.opts.PoolTTL),
+			pool.Transport(r.opts.Transport),
+		)
 	}
 
 	return nil
@@ -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
-		port := 0
+		nodes := make([]*registry.Node, len(opts.Address))
 
-		host, sport, err := net.SplitHostPort(opts.Address)
-		if err == nil {
-			address = host
-			port, _ = strconv.Atoi(sport)
-		}
-
-		return func() (*registry.Node, error) {
-			return &registry.Node{
+		for i, address := range opts.Address {
+			nodes[i] = &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(),
@@ -567,5 +571,5 @@ func (r *rpcClient) NewRequest(service, method string, request interface{}, reqO
 }
 
 func (r *rpcClient) String() string {
-	return "rpc"
+	return "mucp"
 }

client/rpc_client_test.go

@@ -5,24 +5,24 @@ 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 {
 	r := memory.NewRegistry()
-	r.(*memory.Registry).Setup()
-	return r
+	reg := r.(*memory.Registry)
+	reg.Services = testData
+	return reg
 }
 
 func TestCallAddress(t *testing.T) {
 	var called bool
 	service := "test.service"
 	endpoint := "Test.Endpoint"
-	address := "10.1.10.1"
-	port := 8080
+	address := "10.1.10.1:8080"
 
 	wrap := func(cf CallFunc) CallFunc {
 		return func(ctx context.Context, node *registry.Node, req Request, rsp interface{}, opts CallOptions) error {
@@ -40,10 +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
 		}
@@ -59,7 +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)
 	}
 
@@ -113,8 +109,7 @@ func TestCallWrapper(t *testing.T) {
 	id := "test.1"
 	service := "test.service"
 	endpoint := "Test.Endpoint"
-	address := "10.1.10.1"
-	port := 8080
+	address := "10.1.10.1:8080"
 
 	wrap := func(cf CallFunc) CallFunc {
 		return func(ctx context.Context, node *registry.Node, req Request, rsp interface{}, opts CallOptions) error {
@@ -151,7 +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

@@ -0,0 +1,47 @@
+package selector
+
+import (
+	"github.com/micro/go-micro/registry"
+)
+
+var (
+	// mock data
+	testData = map[string][]*registry.Service{
+		"foo": []*registry.Service{
+			{
+				Name:    "foo",
+				Version: "1.0.0",
+				Nodes: []*registry.Node{
+					{
+						Id:      "foo-1.0.0-123",
+						Address: "localhost:9999",
+					},
+					{
+						Id:      "foo-1.0.0-321",
+						Address: "localhost:9999",
+					},
+				},
+			},
+			{
+				Name:    "foo",
+				Version: "1.0.1",
+				Nodes: []*registry.Node{
+					{
+						Id:      "foo-1.0.1-321",
+						Address: "localhost:6666",
+					},
+				},
+			},
+			{
+				Name:    "foo",
+				Version: "1.0.3",
+				Nodes: []*registry.Node{
+					{
+						Id:      "foo-1.0.3-345",
+						Address: "localhost:8888",
+					},
+				},
+			},
+		},
+	}
+)

client/selector/default_test.go

@@ -10,7 +10,8 @@ func TestRegistrySelector(t *testing.T) {
 	counts := map[string]int{}
 
 	r := memory.NewRegistry()
-	r.(*memory.Registry).Setup()
+	rg := r.(*memory.Registry)
+	rg.Services = testData
 	cache := NewSelector(Registry(r))
 
 	next, err := cache.Select("foo")

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,
-			Port:    int(node.Port),
+			Address: fmt.Sprintf("%s:%d", node.Target, 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/network/router"
+	pb "github.com/micro/go-micro/network/router/proto"
+	"github.com/micro/go-micro/registry"
+)
+
+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"
-	"strconv"
-
+	"github.com/micro/go-micro/client/selector"
 	"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,
-			Port:    port,
+			Address: service,
 		}, 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",
-					Port:    1001,
+					Address: "10.0.0.1:1001",
 				},
 				&registry.Node{
 					Id:      "test1-2",
-					Address: "10.0.0.2",
-					Port:    1002,
+					Address: "10.0.0.2:1002",
 				},
 			},
 		},
@@ -30,13 +28,11 @@ func TestStrategies(t *testing.T) {
 			Nodes: []*registry.Node{
 				&registry.Node{
 					Id:      "test1-3",
-					Address: "10.0.0.3",
-					Port:    1003,
+					Address: "10.0.0.3:1003",
 				},
 				&registry.Node{
 					Id:      "test1-4",
-					Address: "10.0.0.4",
-					Port:    1004,
+					Address: "10.0.0.4:1004",
 				},
 			},
 		},

codec/codec.go

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

codec/json/json.go

@@ -5,6 +5,8 @@ import (
 	"encoding/json"
 	"io"
 
+	"github.com/golang/protobuf/jsonpb"
+	"github.com/golang/protobuf/proto"
 	"github.com/micro/go-micro/codec"
 )
 
@@ -22,6 +24,9 @@ func (c *Codec) ReadBody(b interface{}) error {
 	if b == nil {
 		return nil
 	}
+	if pb, ok := b.(proto.Message); ok {
+		return jsonpb.UnmarshalNext(c.Decoder, pb)
+	}
 	return c.Decoder.Decode(b)
 }
 

codec/json/marshaler.go

@@ -2,6 +2,9 @@ package json
 
 import (
 	"encoding/json"
+
+	"github.com/golang/protobuf/jsonpb"
+	"github.com/golang/protobuf/proto"
 )
 
 type Marshaler struct{}
@@ -11,6 +14,9 @@ func (j Marshaler) Marshal(v interface{}) ([]byte, error) {
 }
 
 func (j Marshaler) Unmarshal(d []byte, v interface{}) error {
+	if pb, ok := v.(proto.Message); ok {
+		return jsonpb.UnmarshalString(string(d), pb)
+	}
 	return json.Unmarshal(d, v)
 }
 

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)

codec/text/text.go

@@ -30,6 +30,9 @@ func (c *Codec) ReadBody(b interface{}) error {
 	}
 
 	switch b.(type) {
+	case *string:
+		v := b.(*string)
+		*v = string(buf)
 	case *[]byte:
 		v := b.(*[]byte)
 		*v = buf
@@ -51,6 +54,12 @@ func (c *Codec) Write(m *codec.Message, b interface{}) error {
 	case *[]byte:
 		ve := b.(*[]byte)
 		v = *ve
+	case *string:
+		ve := b.(*string)
+		v = []byte(*ve)
+	case string:
+		ve := b.(string)
+		v = []byte(ve)
 	case []byte:
 		v = b.([]byte)
 	default:
@@ -65,7 +74,7 @@ func (c *Codec) Close() error {
 }
 
 func (c *Codec) String() string {
-	return "bytes"
+	return "text"
 }
 
 func NewCodec(c io.ReadWriteCloser) codec.Codec {

common_test.go

@@ -0,0 +1,47 @@
+package micro
+
+import (
+	"github.com/micro/go-micro/registry"
+)
+
+var (
+	// mock data
+	testData = map[string][]*registry.Service{
+		"foo": []*registry.Service{
+			{
+				Name:    "foo",
+				Version: "1.0.0",
+				Nodes: []*registry.Node{
+					{
+						Id:      "foo-1.0.0-123",
+						Address: "localhost:9999",
+					},
+					{
+						Id:      "foo-1.0.0-321",
+						Address: "localhost:9999",
+					},
+				},
+			},
+			{
+				Name:    "foo",
+				Version: "1.0.1",
+				Nodes: []*registry.Node{
+					{
+						Id:      "foo-1.0.1-321",
+						Address: "localhost:6666",
+					},
+				},
+			},
+			{
+				Name:    "foo",
+				Version: "1.0.3",
+				Nodes: []*registry.Node{
+					{
+						Id:      "foo-1.0.3-345",
+						Address: "localhost:8888",
+					},
+				},
+			},
+		},
+	}
+)

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

@@ -11,7 +11,11 @@ import (
 
 	"github.com/micro/cli"
 	"github.com/micro/go-micro/client"
+	cgrpc "github.com/micro/go-micro/client/grpc"
+	cmucp "github.com/micro/go-micro/client/mucp"
 	"github.com/micro/go-micro/server"
+	sgrpc "github.com/micro/go-micro/server/grpc"
+	smucp "github.com/micro/go-micro/server/mucp"
 	"github.com/micro/go-micro/util/log"
 
 	// brokers
@@ -28,9 +32,10 @@ import (
 	rmem "github.com/micro/go-micro/registry/memory"
 
 	// selectors
-	"github.com/micro/go-micro/selector"
-	"github.com/micro/go-micro/selector/dns"
-	"github.com/micro/go-micro/selector/static"
+	"github.com/micro/go-micro/client/selector"
+	"github.com/micro/go-micro/client/selector/dns"
+	"github.com/micro/go-micro/client/selector/router"
+	"github.com/micro/go-micro/client/selector/static"
 
 	// transports
 	"github.com/micro/go-micro/transport"
@@ -176,7 +181,9 @@ var (
 	}
 
 	DefaultClients = map[string]func(...client.Option) client.Client{
-		"rpc": client.NewClient,
+		"rpc":  client.NewClient,
+		"mucp": cmucp.NewClient,
+		"grpc": cgrpc.NewClient,
 	}
 
 	DefaultRegistries = map[string]func(...registry.Option) registry.Registry{
@@ -190,11 +197,14 @@ var (
 		"default": selector.NewSelector,
 		"dns":     dns.NewSelector,
 		"cache":   selector.NewSelector,
+		"router":  router.NewSelector,
 		"static":  static.NewSelector,
 	}
 
 	DefaultServers = map[string]func(...server.Option) server.Server{
-		"rpc": server.NewServer,
+		"rpc":  server.NewServer,
+		"mucp": smucp.NewServer,
+		"grpc": sgrpc.NewServer,
 	}
 
 	DefaultTransports = map[string]func(...transport.Option) transport.Transport{

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) {
-	/*consulSource := consul.NewSource(
-		// optionally specify consul address; default to localhost:8500
-		consul.WithAddress("131.150.38.111:8500"),
-		// optionally specify prefix; defaults to /micro/config
-		consul.WithPrefix("/project"),
-		// optionally strip the provided prefix from the keys, defaults to false
-		consul.StripPrefix(true),
-		consul.WithDatacenter("dc1"),
-		consul.WithToken("xxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"),
+func TestConfigMerge(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(),
 	)
 
-	// Create new config
-	conf := NewConfig()
-
-	// Load file source
-	err := conf.Load(consulSource)
-	if err != nil {
-		t.Error(err)
-		return
+	actualHost := conf.Get("amqp", "host").String("backup")
+	if actualHost != "rabbit.testing.com" {
+		t.Fatalf("Expected %v but got %v",
+			"rabbit.testing.com",
+			actualHost)
 	}
-
-	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 {
-		path  []string
-		value string
+		csdata   []byte
+		path     []string
+		accepter interface{}
+		value    interface{}
 	}{
 		{
+			[]byte(`{"foo": "bar", "baz": {"bar": "cat"}}`),
 			[]string{"foo"},
+			emptyStr,
 			"bar",
 		},
 		{
+			[]byte(`{"foo": "bar", "baz": {"bar": "cat"}}`),
 			[]string{"baz", "bar"},
+			emptyStr,
 			"cat",
 		},
 	}
 
-	values, err := newValues(&source.ChangeSet{
-		Data: data,
-	})
+	for idx, test := range testData {
+		values, err := newValues(&source.ChangeSet{
+			Data: test.csdata,
+		})
+		if err != nil {
+			t.Fatal(err)
+		}
 
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	for _, test := range testData {
-		if v := values.Get(test.path...).String(""); v != test.value {
-			t.Fatalf("Expected %s got %s for path %v", test.value, v, test.path)
+		err = values.Get(test.path...).Scan(&test.accepter)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if test.accepter != test.value {
+			t.Fatalf("No.%d Expected %v got %v for path %v", idx, test.value, test.accepter, test.path)
+		}
+	}
+}
+
+func TestStructArray(t *testing.T) {
+	type T struct {
+		Foo string
+	}
+
+	emptyTSlice := []T{}
+
+	testData := []struct {
+		csdata   []byte
+		accepter []T
+		value    []T
+	}{
+		{
+			[]byte(`[{"foo": "bar"}]`),
+			emptyTSlice,
+			[]T{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), "/")
-		var val map[string]interface{}
+		pathString := strings.TrimPrefix(strings.TrimPrefix(v.Key, strings.TrimPrefix(stripPrefix, "/")), "/")
+		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
-			for _, dir := range path {
-				if _, ok := target[dir]; !ok {
-					target[dir] = make(map[string]interface{})
-				}
-				target = target[dir].(map[string]interface{})
+		path := strings.Split(pathString, "/")
+		// find (or create) the leaf node we want to put this value at
+		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 {
-			target[k] = val[k]
+		switch val.(type) {
+		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/etcd/README.md

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

config/source/etcd/etcd.go

@@ -1,134 +0,0 @@
-package etcd
-
-import (
-	"context"
-	"fmt"
-	"net"
-	"time"
-
-	"github.com/micro/go-micro/config/source"
-	cetcd "go.etcd.io/etcd/clientv3"
-	"go.etcd.io/etcd/mvcc/mvccpb"
-)
-
-// Currently a single etcd reader
-type etcd struct {
-	prefix      string
-	stripPrefix string
-	opts        source.Options
-	client      *cetcd.Client
-	cerr        error
-}
-
-var (
-	DefaultPrefix = "/micro/config/"
-)
-
-func (c *etcd) Read() (*source.ChangeSet, error) {
-	if c.cerr != nil {
-		return nil, c.cerr
-	}
-
-	rsp, err := c.client.Get(context.Background(), c.prefix, cetcd.WithPrefix())
-	if err != nil {
-		return nil, err
-	}
-
-	if rsp == nil || len(rsp.Kvs) == 0 {
-		return nil, fmt.Errorf("source not found: %s", c.prefix)
-	}
-
-	var kvs []*mvccpb.KeyValue
-	for _, v := range rsp.Kvs {
-		kvs = append(kvs, (*mvccpb.KeyValue)(v))
-	}
-
-	data := makeMap(c.opts.Encoder, kvs, c.stripPrefix)
-
-	b, err := c.opts.Encoder.Encode(data)
-	if err != nil {
-		return nil, fmt.Errorf("error reading source: %v", err)
-	}
-
-	cs := &source.ChangeSet{
-		Timestamp: time.Now(),
-		Source:    c.String(),
-		Data:      b,
-		Format:    c.opts.Encoder.String(),
-	}
-	cs.Checksum = cs.Sum()
-
-	return cs, nil
-}
-
-func (c *etcd) String() string {
-	return "etcd"
-}
-
-func (c *etcd) Watch() (source.Watcher, error) {
-	if c.cerr != nil {
-		return nil, c.cerr
-	}
-	cs, err := c.Read()
-	if err != nil {
-		return nil, err
-	}
-	return newWatcher(c.prefix, c.stripPrefix, c.client.Watcher, cs, c.opts)
-}
-
-func NewSource(opts ...source.Option) source.Source {
-	options := source.NewOptions(opts...)
-
-	var endpoints []string
-
-	// check if there are any addrs
-	addrs, ok := options.Context.Value(addressKey{}).([]string)
-	if ok {
-		for _, a := range addrs {
-			addr, port, err := net.SplitHostPort(a)
-			if ae, ok := err.(*net.AddrError); ok && ae.Err == "missing port in address" {
-				port = "2379"
-				addr = a
-				endpoints = append(endpoints, fmt.Sprintf("%s:%s", addr, port))
-			} else if err == nil {
-				endpoints = append(endpoints, fmt.Sprintf("%s:%s", addr, port))
-			}
-		}
-	}
-
-	if len(endpoints) == 0 {
-		endpoints = []string{"localhost:2379"}
-	}
-
-	config := cetcd.Config{
-		Endpoints: endpoints,
-	}
-
-	u, ok := options.Context.Value(authKey{}).(*authCreds)
-	if ok {
-		config.Username = u.Username
-		config.Password = u.Password
-	}
-
-	// use default config
-	client, err := cetcd.New(config)
-
-	prefix := DefaultPrefix
-	sp := ""
-	f, ok := options.Context.Value(prefixKey{}).(string)
-	if ok {
-		prefix = f
-	}
-
-	if b, ok := options.Context.Value(stripPrefixKey{}).(bool); ok && b {
-		sp = prefix
-	}
-
-	return &etcd{
-		prefix:      prefix,
-		stripPrefix: sp,
-		opts:        options,
-		client:      client,
-		cerr:        err,
-	}
-}

config/source/etcd/options.go

@@ -1,58 +0,0 @@
-package etcd
-
-import (
-	"context"
-
-	"github.com/micro/go-micro/config/source"
-)
-
-type addressKey struct{}
-type prefixKey struct{}
-type stripPrefixKey struct{}
-type authKey struct{}
-
-type authCreds struct {
-	Username string
-	Password string
-}
-
-// WithAddress sets the consul address
-func WithAddress(a ...string) source.Option {
-	return func(o *source.Options) {
-		if o.Context == nil {
-			o.Context = context.Background()
-		}
-		o.Context = context.WithValue(o.Context, addressKey{}, a)
-	}
-}
-
-// WithPrefix sets the key prefix to use
-func WithPrefix(p string) source.Option {
-	return func(o *source.Options) {
-		if o.Context == nil {
-			o.Context = context.Background()
-		}
-		o.Context = context.WithValue(o.Context, prefixKey{}, p)
-	}
-}
-
-// StripPrefix indicates whether to remove the prefix from config entries, or leave it in place.
-func StripPrefix(strip bool) source.Option {
-	return func(o *source.Options) {
-		if o.Context == nil {
-			o.Context = context.Background()
-		}
-
-		o.Context = context.WithValue(o.Context, stripPrefixKey{}, strip)
-	}
-}
-
-// Auth allows you to specify username/password
-func Auth(username, password string) source.Option {
-	return func(o *source.Options) {
-		if o.Context == nil {
-			o.Context = context.Background()
-		}
-		o.Context = context.WithValue(o.Context, authKey{}, &authCreds{Username: username, Password: password})
-	}
-}

config/source/etcd/util.go

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

config/source/etcd/watcher.go

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

data/store/consul/consul.go

@@ -6,24 +6,26 @@ import (
 	"net"
 
 	"github.com/hashicorp/consul/api"
-	"github.com/micro/go-micro/sync/data"
+	"github.com/micro/go-micro/config/options"
+	"github.com/micro/go-micro/data/store"
 )
 
 type ckv struct {
+	options.Options
 	client *api.Client
 }
 
-func (c *ckv) Read(key string) (*data.Record, error) {
+func (c *ckv) Read(key string) (*store.Record, error) {
 	keyval, _, err := c.client.KV().Get(key, nil)
 	if err != nil {
 		return nil, err
 	}
 
 	if keyval == nil {
-		return nil, data.ErrNotFound
+		return nil, store.ErrNotFound
 	}
 
-	return &data.Record{
+	return &store.Record{
 		Key:   keyval.Key,
 		Value: keyval.Value,
 	}, nil
@@ -34,7 +36,7 @@ func (c *ckv) Delete(key string) error {
 	return err
 }
 
-func (c *ckv) Write(record *data.Record) error {
+func (c *ckv) Write(record *store.Record) error {
 	_, err := c.client.KV().Put(&api.KVPair{
 		Key:   record.Key,
 		Value: record.Value,
@@ -42,17 +44,17 @@ func (c *ckv) Write(record *data.Record) error {
 	return err
 }
 
-func (c *ckv) Dump() ([]*data.Record, error) {
+func (c *ckv) Dump() ([]*store.Record, error) {
 	keyval, _, err := c.client.KV().List("/", nil)
 	if err != nil {
 		return nil, err
 	}
 	if keyval == nil {
-		return nil, data.ErrNotFound
+		return nil, store.ErrNotFound
 	}
-	var vals []*data.Record
+	var vals []*store.Record
 	for _, keyv := range keyval {
-		vals = append(vals, &data.Record{
+		vals = append(vals, &store.Record{
 			Key:   keyv.Key,
 			Value: keyv.Value,
 		})
@@ -64,22 +66,22 @@ func (c *ckv) String() string {
 	return "consul"
 }
 
-func NewData(opts ...data.Option) data.Data {
-	var options data.Options
-	for _, o := range opts {
-		o(&options)
-	}
-
+func NewStore(opts ...options.Option) store.Store {
+	options := options.NewOptions(opts...)
 	config := api.DefaultConfig()
 
+	var nodes []string
+
+	if n, ok := options.Values().Get("store.nodes"); ok {
+		nodes = n.([]string)
+	}
+
 	// set host
-	// config.Host something
-	// check if there are any addrs
-	if len(options.Nodes) > 0 {
-		addr, port, err := net.SplitHostPort(options.Nodes[0])
+	if len(nodes) > 0 {
+		addr, port, err := net.SplitHostPort(nodes[0])
 		if ae, ok := err.(*net.AddrError); ok && ae.Err == "missing port in address" {
 			port = "8500"
-			config.Address = fmt.Sprintf("%s:%s", options.Nodes[0], port)
+			config.Address = fmt.Sprintf("%s:%s", nodes[0], port)
 		} else if err == nil {
 			config.Address = fmt.Sprintf("%s:%s", addr, port)
 		}
@@ -88,6 +90,7 @@ func NewData(opts ...data.Option) data.Data {
 	client, _ := api.NewClient(config)
 
 	return &ckv{
-		client: client,
+		Options: options,
+		client:  client,
 	}
 }

data/store/memory/memory.go

@@ -0,0 +1,108 @@
+// Package memory is a in-memory store store
+package memory
+
+import (
+	"sync"
+	"time"
+
+	"github.com/micro/go-micro/config/options"
+	"github.com/micro/go-micro/data/store"
+)
+
+type memoryStore struct {
+	options.Options
+
+	sync.RWMutex
+	values map[string]*memoryRecord
+}
+
+type memoryRecord struct {
+	r *store.Record
+	c time.Time
+}
+
+func (m *memoryStore) Dump() ([]*store.Record, error) {
+	m.RLock()
+	defer m.RUnlock()
+
+	var values []*store.Record
+
+	for _, v := range m.values {
+		// get expiry
+		d := v.r.Expiry
+		t := time.Since(v.c)
+
+		if d > time.Duration(0) {
+			// expired
+			if t > d {
+				continue
+			}
+			// update expiry
+			v.r.Expiry -= t
+			v.c = time.Now()
+		}
+
+		values = append(values, v.r)
+	}
+
+	return values, nil
+}
+
+func (m *memoryStore) Read(key string) (*store.Record, error) {
+	m.RLock()
+	defer m.RUnlock()
+
+	v, ok := m.values[key]
+	if !ok {
+		return nil, store.ErrNotFound
+	}
+
+	// get expiry
+	d := v.r.Expiry
+	t := time.Since(v.c)
+
+	// expired
+	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
+}
+
+func (m *memoryStore) Write(r *store.Record) error {
+	m.Lock()
+	defer m.Unlock()
+
+	// set the record
+	m.values[r.Key] = &memoryRecord{
+		r: r,
+		c: time.Now(),
+	}
+
+	return nil
+}
+
+func (m *memoryStore) Delete(key string) error {
+	m.Lock()
+	defer m.Unlock()
+
+	// delete the value
+	delete(m.values, key)
+
+	return nil
+}
+
+// NewStore returns a new store.Store
+func NewStore(opts ...options.Option) store.Store {
+	options := options.NewOptions(opts...)
+
+	return &memoryStore{
+		Options: options,
+		values:  make(map[string]*memoryRecord),
+	}
+}

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")
+	}
+}

data/store/options.go

@@ -0,0 +1,15 @@
+package store
+
+import (
+	"github.com/micro/go-micro/config/options"
+)
+
+// Set the nodes used to back the store
+func Nodes(a ...string) options.Option {
+	return options.WithValue("store.nodes", a)
+}
+
+// Prefix sets a prefix to any key ids used
+func Prefix(p string) options.Option {
+	return options.WithValue("store.prefix", p)
+}

data/store/store.go

@@ -1,17 +1,21 @@
-// Package data is an interface for key-value storage.
-package data
+// Package store is an interface for distribute data storage.
+package store
 
 import (
 	"errors"
 	"time"
+
+	"github.com/micro/go-micro/config/options"
 )
 
 var (
 	ErrNotFound = errors.New("not found")
 )
 
-// Data is a data storage interface
-type Data interface {
+// Store is a data storage interface
+type Store interface {
+	// embed options
+	options.Options
 	// Dump the known records
 	Dump() ([]*Record, error)
 	// Read a record with key
@@ -24,9 +28,7 @@ type Data interface {
 
 // Record represents a data record
 type Record struct {
-	Key        string
-	Value      []byte
-	Expiration time.Duration
+	Key    string
+	Value  []byte
+	Expiry time.Duration
 }
-
-type Option func(o *Options)

function_test.go

@@ -14,7 +14,7 @@ func TestFunction(t *testing.T) {
 	wg.Add(1)
 
 	r := memory.NewRegistry()
-	r.(*memory.Registry).Setup()
+	r.(*memory.Registry).Services = testData
 
 	// create service
 	fn := NewFunction(

go.mod

@@ -3,44 +3,82 @@ module github.com/micro/go-micro
 go 1.12
 
 require (
+	cloud.google.com/go v0.41.0 // indirect
 	github.com/BurntSushi/toml v0.3.1
+	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/coreos/etcd v3.3.13+incompatible // indirect
+	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/ghodss/yaml v1.0.0
+	github.com/gliderlabs/ssh v0.2.2 // indirect
+	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/uuid v1.1.1
-	github.com/gorilla/handlers v1.4.0
+	github.com/gorilla/handlers v1.4.1
+	github.com/gorilla/mux v1.7.3 // indirect
 	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/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/kevinburke/ssh_config v0.0.0-20190630040420-2e50c441276c // indirect
+	github.com/kisielk/errcheck v1.2.0 // indirect
+	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
+	github.com/kr/pty v1.1.8 // 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 v0.7.1-0.20190710050138-1441923ab031
+	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 v0.1.1-0.20190729112526-ef68c9635478
+	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/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/common v0.6.0 // indirect
+	github.com/prometheus/procfs v0.0.3 // indirect
+	github.com/sirupsen/logrus v1.4.2 // indirect
+	github.com/stretchr/objx v0.2.0 // indirect
 	github.com/technoweenie/multipartstreamer v1.0.1 // indirect
-	go.etcd.io/etcd v3.3.13+incompatible
-	golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5
-	golang.org/x/net v0.0.0-20190606173856-1492cefac77f
-	google.golang.org/grpc v1.21.1
+	golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4
+	golang.org/x/exp v0.0.0-20190627132806-fd42eb6b336f // indirect
+	golang.org/x/image v0.0.0-20190703141733-d6a02ce849c9 // indirect
+	golang.org/x/mobile v0.0.0-20190711165009-e47acb2ca7f9 // indirect
+	golang.org/x/mod v0.1.0 // indirect
+	golang.org/x/net v0.0.0-20190628185345-da137c7871d7
+	golang.org/x/sys v0.0.0-20190710143415-6ec70d6a5542 // indirect
+	golang.org/x/tools v0.0.0-20190711191110-9a621aea19f8 // indirect
+	google.golang.org/genproto v0.0.0-20190708153700-3bdd9d9f5532 // indirect
+	google.golang.org/grpc v1.22.0
 	gopkg.in/go-playground/validator.v9 v9.29.0
-	gopkg.in/src-d/go-git.v4 v4.11.0
+	gopkg.in/src-d/go-billy.v4 v4.3.1 // indirect
+	gopkg.in/src-d/go-git.v4 v4.12.0
 	gopkg.in/telegram-bot-api.v4 v4.6.4
+	honnef.co/go/tools v0.0.0-20190614002413-cb51c254f01b // indirect
 )

go.sum

@@ -1,16 +1,31 @@
 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=
 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/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/units v0.0.0-20151022065526-2efee857e7cf/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/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=
@@ -18,11 +33,14 @@ 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/coreos/etcd v3.3.13+incompatible h1:8F3hqu9fGYLBifCmRCJsicFqDx/D68Rt3q1JMazcgBQ=
-github.com/coreos/etcd v3.3.13+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
+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/docker v0.7.3-0.20190309235953-33c3200e0d16 h1:dmUn0SuGx7unKFwxyeQ/oLUHhEfZosEDrpmYM+6MTuc=
@@ -33,6 +51,8 @@ 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=
@@ -44,30 +64,52 @@ github.com/fsouza/go-dockerclient v1.4.1/go.mod h1:PUNHxbowDqRXfRgZqMz1OeGtbWC6V
 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=
 github.com/go-playground/locales v0.12.1/go.mod h1:IUMDtCfWo/w/mtMfIE/IG2K+Ey3ygWanZIBtBW0W2TM=
 github.com/go-playground/universal-translator v0.16.0 h1:X++omBR/4cE2MNg91AoC3rmGrCjJ8eAeUP/K/EKx4DM=
 github.com/go-playground/universal-translator v0.16.0/go.mod h1:1AnU7NaIRDWWzGEKwgtJRd2xk99HeFyHw3yid4rvQIY=
+github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
+github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/gogo/protobuf v1.2.1 h1:/s5zKNz0uPFCZ5hddgPdo2TK2TVrUNMn0OOX8/aZMTE=
 github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zVXpSg4=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
 github.com/golang/mock v1.2.0/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
+github.com/golang/mock v1.3.1/go.mod h1:sBzyDLLjw3U8JLTeZvSv8jJB+tU5PVekmnlKIyFUx0Y=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
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+gopkg.in/src-d/go-git-fixtures.v3 v3.5.0/go.mod h1:dLBcvytrw/TYZsNTWCnkNF2DSIlzWYqTe3rJR56Ac7g=
 gopkg.in/src-d/go-git.v4 v4.11.0 h1:cJwWgJ0DXifrNrXM6RGN1Y2yR60Rr1zQ9Q5DX5S9qgU=
 gopkg.in/src-d/go-git.v4 v4.11.0/go.mod h1:Vtut8izDyrM8BUVQnzJ+YvmNcem2J89EmfZYCkLokZk=
+gopkg.in/src-d/go-git.v4 v4.12.0 h1:CKgvBCJCcdfNnyXPYI4Cp8PaDDAmAPEN0CtfEdEAbd8=
+gopkg.in/src-d/go-git.v4 v4.12.0/go.mod h1:zjlNnzc1Wjn43v3Mtii7RVxiReNP0fIu9npcXKzuNp4=
 gopkg.in/telegram-bot-api.v4 v4.6.4 h1:hpHWhzn4jTCsAJZZ2loNKfy2QWyPDRJVl3aTFXeMW8g=
 gopkg.in/telegram-bot-api.v4 v4.6.4/go.mod h1:5DpGO5dbumb40px+dXcwCpcjmeHNYLpk0bp3XRNvWDM=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
@@ -258,3 +485,8 @@ gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190614002413-cb51c254f01b/go.mod h1:JlmFZigtG9vBVR3QGIQ9g/Usz4BzH+Xm6Z8iHQWRYUw=
+rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=

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/proxy/grpc/grpc.go

@@ -9,9 +9,8 @@ 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/options"
-	"github.com/micro/go-micro/proxy"
+	"github.com/micro/go-micro/config/options"
+	"github.com/micro/go-micro/network/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...)

network/proxy/http/http.go

@@ -10,9 +10,9 @@ import (
 	"net/url"
 	"path"
 
+	"github.com/micro/go-micro/config/options"
 	"github.com/micro/go-micro/errors"
-	"github.com/micro/go-micro/options"
-	"github.com/micro/go-micro/proxy"
+	"github.com/micro/go-micro/network/proxy"
 	"github.com/micro/go-micro/server"
 )
 

network/proxy/mucp/mucp.go

@@ -0,0 +1,325 @@
+// Package mucp transparently forwards the incoming request using a go-micro client.
+package mucp
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"strings"
+	"sync"
+
+	"github.com/micro/go-micro/client"
+	"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/network/proxy"
+	"github.com/micro/go-micro/network/router"
+	"github.com/micro/go-micro/server"
+)
+
+// Proxy will transparently proxy requests to an endpoint.
+// If no endpoint is specified it will call a service using the client.
+type Proxy struct {
+	// embed options
+	options.Options
+
+	// Endpoint specifies the fixed service endpoint to call.
+	Endpoint string
+
+	// The client to use for outbound requests
+	Client client.Client
+
+	// The router for routes
+	Router router.Router
+
+	// A fib of routes service:address
+	sync.RWMutex
+	Routes map[string]map[uint64]router.Route
+
+	// The channel to monitor watcher errors
+	errChan chan error
+}
+
+// read client request and write to server
+func readLoop(r server.Request, s client.Stream) error {
+	// request to backend server
+	req := s.Request()
+
+	for {
+		// get data from client
+		//  no need to decode it
+		body, err := r.Read()
+		if err == io.EOF {
+			return nil
+		}
+
+		if err != nil {
+			return err
+		}
+
+		// get the header from client
+		hdr := r.Header()
+		msg := &codec.Message{
+			Type:   codec.Request,
+			Header: hdr,
+			Body:   body,
+		}
+
+		// write the raw request
+		err = req.Codec().Write(msg, nil)
+		if err == io.EOF {
+			return nil
+		} else if err != nil {
+			return err
+		}
+	}
+}
+
+// toNodes returns a list of node addresses from given routes
+func toNodes(routes map[uint64]router.Route) []string {
+	var nodes []string
+	for _, node := range routes {
+		address := node.Address
+		if len(node.Gateway) > 0 {
+			address = node.Gateway
+		}
+		nodes = append(nodes, address)
+	}
+	return nodes
+}
+
+func (p *Proxy) getRoute(service string) ([]string, error) {
+	// lookup the route cache first
+	p.Lock()
+	routes, ok := p.Routes[service]
+	if ok {
+		p.Unlock()
+		return toNodes(routes), nil
+	}
+	p.Routes[service] = make(map[uint64]router.Route)
+	p.Unlock()
+
+	// if the router is broken return error
+	if status := p.Router.Status(); status.Code == router.Error {
+		return nil, status.Error
+	}
+
+	// lookup the routes in the router
+	results, err := p.Router.Lookup(router.NewQuery(router.QueryService(service)))
+	if err != nil {
+		return nil, err
+	}
+
+	// update the proxy cache
+	p.Lock()
+	for _, route := range results {
+		p.Routes[service][route.Hash()] = route
+	}
+	routes = p.Routes[service]
+	p.Unlock()
+
+	return toNodes(routes), nil
+}
+
+// manageRouteCache applies action on a given route to Proxy route cache
+func (p *Proxy) manageRouteCache(route router.Route, action string) error {
+	switch action {
+	case "create", "update":
+		if _, ok := p.Routes[route.Service]; !ok {
+			p.Routes[route.Service] = make(map[uint64]router.Route)
+		}
+		p.Routes[route.Service][route.Hash()] = route
+	case "delete":
+		if _, ok := p.Routes[route.Service]; !ok {
+			return fmt.Errorf("route not found")
+		}
+		delete(p.Routes[route.Service], route.Hash())
+	default:
+		return fmt.Errorf("unknown action: %s", action)
+	}
+
+	return nil
+}
+
+// watchRoutes watches service routes and updates proxy cache
+func (p *Proxy) watchRoutes() {
+	// this is safe to do as the only way watchRoutes returns is
+	// when some error is written into error channel - we want to bail then
+	defer close(p.errChan)
+
+	// route watcher
+	w, err := p.Router.Watch()
+	if err != nil {
+		p.errChan <- err
+		return
+	}
+
+	for {
+		event, err := w.Next()
+		if err != nil {
+			p.errChan <- err
+			return
+		}
+
+		p.Lock()
+		if err := p.manageRouteCache(event.Route, fmt.Sprintf("%s", event.Type)); err != nil {
+			// TODO: should we bail here?
+			p.Unlock()
+			continue
+		}
+		p.Unlock()
+	}
+}
+
+// ServeRequest honours the server.Router interface
+func (p *Proxy) ServeRequest(ctx context.Context, req server.Request, rsp server.Response) error {
+	// service name
+	service := req.Service()
+	endpoint := req.Endpoint()
+	var addresses []string
+
+	// call a specific backend endpoint either by name or address
+	if len(p.Endpoint) > 0 {
+		// address:port
+		if parts := strings.Split(p.Endpoint, ":"); len(parts) > 1 {
+			addresses = []string{p.Endpoint}
+		} else {
+			// get route for endpoint from router
+			addr, err := p.getRoute(p.Endpoint)
+			if err != nil {
+				return err
+			}
+			// set the address
+			addresses = addr
+			// set the name
+			service = p.Endpoint
+		}
+	} else {
+		// no endpoint was specified just lookup the route
+		// get route for endpoint from router
+		addr, err := p.getRoute(service)
+		if err != nil {
+			return err
+		}
+		addresses = addr
+	}
+
+	var opts []client.CallOption
+
+	// set address if available
+	if len(addresses) > 0 {
+		opts = append(opts, client.WithAddress(addresses...))
+	}
+
+	// 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()))
+
+	// create new stream
+	stream, err := p.Client.Stream(ctx, creq, opts...)
+	if err != nil {
+		return err
+	}
+	defer stream.Close()
+
+	// create client request read loop
+	go readLoop(req, stream)
+
+	// get raw response
+	resp := stream.Response()
+
+	// route watcher error
+	var watchErr error
+
+	// create server response write loop
+	for {
+		select {
+		case err := <-p.errChan:
+			if err != nil {
+				watchErr = err
+			}
+			return watchErr
+		default:
+			// read backend response body
+			body, err := resp.Read()
+			if err == io.EOF {
+				return nil
+			} else if err != nil {
+				return err
+			}
+
+			// read backend response header
+			hdr := resp.Header()
+
+			// write raw response header to client
+			rsp.WriteHeader(hdr)
+
+			// write raw response body to client
+			err = rsp.Write(body)
+			if err == io.EOF {
+				return nil
+			} else if err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
+
+// NewSingleHostProxy returns a proxy which sends requests to a single backend
+func NewSingleHostProxy(endpoint string) *Proxy {
+	return &Proxy{
+		Options:  options.NewOptions(),
+		Endpoint: endpoint,
+	}
+}
+
+// NewProxy returns a new proxy which will route based on mucp headers
+func NewProxy(opts ...options.Option) proxy.Proxy {
+	p := new(Proxy)
+	p.Options = options.NewOptions(opts...)
+	p.Options.Init(options.WithString("mucp"))
+
+	// get endpoint
+	ep, ok := p.Options.Values().Get("proxy.endpoint")
+	if ok {
+		p.Endpoint = ep.(string)
+	}
+
+	// get client
+	c, ok := p.Options.Values().Get("proxy.client")
+	if ok {
+		p.Client = c.(client.Client)
+	}
+
+	// set the default client
+	if p.Client == nil {
+		p.Client = client.DefaultClient
+	}
+
+	// get router
+	r, ok := p.Options.Values().Get("proxy.router")
+	if ok {
+		p.Router = r.(router.Router)
+	}
+
+	// create default router and start it
+	if p.Router == nil {
+		p.Router = router.DefaultRouter
+	}
+
+	// routes cache
+	p.Routes = make(map[string]map[uint64]router.Route)
+
+	// watch router service routes
+	p.errChan = make(chan error, 1)
+	go p.watchRoutes()
+
+	return p
+}

network/proxy/proxy.go

@@ -5,7 +5,8 @@ import (
 	"context"
 
 	"github.com/micro/go-micro/client"
-	"github.com/micro/go-micro/options"
+	"github.com/micro/go-micro/config/options"
+	"github.com/micro/go-micro/network/router"
 	"github.com/micro/go-micro/server"
 )
 
@@ -29,3 +30,8 @@ func WithEndpoint(e string) options.Option {
 func WithClient(c client.Client) options.Option {
 	return options.WithValue("proxy.client", c)
 }
+
+// WithRouter specifies the router to use
+func WithRouter(r router.Router) options.Option {
+	return options.WithValue("proxy.router", r)
+}

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/router/default.go

@@ -0,0 +1,684 @@
+package router
+
+import (
+	"fmt"
+	"math"
+	"sort"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/micro/go-micro/registry"
+)
+
+const (
+	// AdvertiseEventsTick is time interval in which the router advertises route updates
+	AdvertiseEventsTick = 5 * time.Second
+	// AdvertiseTableTick is time interval in which router advertises all routes found in routing table
+	AdvertiseTableTick = 1 * time.Minute
+	// AdvertiseFlushTick is time the yet unconsumed advertisements are flush i.e. discarded
+	AdvertiseFlushTick = 15 * time.Second
+	// AdvertSuppress is advert suppression threshold
+	AdvertSuppress = 2000.0
+	// AdvertRecover is advert recovery threshold
+	AdvertRecover = 750.0
+	// DefaultAdvertTTL is default advertisement TTL
+	DefaultAdvertTTL = 1 * time.Minute
+	// DeletePenalty penalises route deletion
+	DeletePenalty = 1000.0
+	// UpdatePenalty penalises route updates
+	UpdatePenalty = 500.0
+	// PenaltyHalfLife is the time the advert penalty decays to half its value
+	PenaltyHalfLife = 2.0
+	// MaxSuppressTime defines time after which the suppressed advert is deleted
+	MaxSuppressTime = 5 * time.Minute
+)
+
+var (
+	// PenaltyDecay is a coefficient which controls the speed the advert penalty decays
+	PenaltyDecay = math.Log(2) / PenaltyHalfLife
+)
+
+// router implements default router
+type router struct {
+	sync.RWMutex
+	// embed the table
+	table     *table
+	opts      Options
+	status    Status
+	exit      chan struct{}
+	errChan   chan error
+	eventChan chan *Event
+	advertWg  *sync.WaitGroup
+	wg        *sync.WaitGroup
+
+	// advert subscribers
+	subscribers map[string]chan *Advert
+}
+
+// newRouter creates new router and returns it
+func newRouter(opts ...Option) Router {
+	// get default options
+	options := DefaultOptions()
+
+	// apply requested options
+	for _, o := range opts {
+		o(&options)
+	}
+
+	r := &router{
+		table:       newTable(),
+		opts:        options,
+		status:      Status{Code: Stopped, Error: nil},
+		advertWg:    &sync.WaitGroup{},
+		wg:          &sync.WaitGroup{},
+		subscribers: make(map[string]chan *Advert),
+	}
+
+	go r.run()
+
+	return r
+}
+
+// Init initializes router with given options
+func (r *router) Init(opts ...Option) error {
+	for _, o := range opts {
+		o(&r.opts)
+	}
+	return nil
+}
+
+// Options returns router options
+func (r *router) Options() Options {
+	return r.opts
+}
+
+func (r *router) Table() Table {
+	return r.table
+}
+
+// manageRoute applies action on a given route
+func (r *router) manageRoute(route Route, action string) error {
+	switch action {
+	case "create":
+		if err := r.table.Create(route); err != nil && err != ErrDuplicateRoute {
+			return fmt.Errorf("failed adding route for service %s: %s", route.Service, err)
+		}
+	case "update":
+		if err := r.table.Update(route); err != nil && err != ErrDuplicateRoute {
+			return fmt.Errorf("failed updating route for service %s: %s", route.Service, err)
+		}
+	case "delete":
+		if err := r.table.Delete(route); err != nil && err != ErrRouteNotFound {
+			return fmt.Errorf("failed deleting route for service %s: %s", route.Service, err)
+		}
+	default:
+		return fmt.Errorf("failed to manage route for service %s. Unknown action: %s", route.Service, action)
+	}
+
+	return nil
+}
+
+// manageServiceRoutes applies action to all routes of the service.
+// It returns error of the action fails with error.
+func (r *router) manageServiceRoutes(service *registry.Service, action string) error {
+	// action is the routing table action
+	action = strings.ToLower(action)
+
+	// take route action on each service node
+	for _, node := range service.Nodes {
+		route := Route{
+			Service: service.Name,
+			Address: node.Address,
+			Gateway: "",
+			Network: r.opts.Network,
+			Link:    DefaultLink,
+			Metric:  DefaultLocalMetric,
+		}
+
+		if err := r.manageRoute(route, action); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// manageRegistryRoutes applies action to all routes of each service found in the registry.
+// It returns error if either the services failed to be listed or the routing table action fails.
+func (r *router) manageRegistryRoutes(reg registry.Registry, action string) error {
+	services, err := reg.ListServices()
+	if err != nil {
+		return fmt.Errorf("failed listing services: %v", err)
+	}
+
+	// add each service node as a separate route
+	for _, service := range services {
+		// get the service to retrieve all its info
+		srvs, err := reg.GetService(service.Name)
+		if err != nil {
+			continue
+		}
+		// manage the routes for all returned services
+		for _, srv := range srvs {
+			if err := r.manageServiceRoutes(srv, action); err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
+
+// watchRegistry watches registry and updates routing table based on the received events.
+// It returns error if either the registry watcher fails with error or if the routing table update fails.
+func (r *router) watchRegistry(w registry.Watcher) error {
+	// wait in the background for the router to stop
+	// when the router stops, stop the watcher and exit
+	r.wg.Add(1)
+	go func() {
+		defer r.wg.Done()
+		<-r.exit
+		w.Stop()
+	}()
+
+	var watchErr error
+
+	for {
+		res, err := w.Next()
+		if err != nil {
+			if err != registry.ErrWatcherStopped {
+				watchErr = err
+			}
+			break
+		}
+
+		if err := r.manageServiceRoutes(res.Service, res.Action); err != nil {
+			return err
+		}
+	}
+
+	return watchErr
+}
+
+// watchTable watches routing table entries and either adds or deletes locally registered service to/from network registry
+// It returns error if the locally registered services either fails to be added/deleted to/from network registry.
+func (r *router) watchTable(w Watcher) error {
+	// wait in the background for the router to stop
+	// when the router stops, stop the watcher and exit
+	r.wg.Add(1)
+	go func() {
+		defer r.wg.Done()
+		<-r.exit
+		w.Stop()
+	}()
+
+	var watchErr error
+
+	for {
+		event, err := w.Next()
+		if err != nil {
+			if err != ErrWatcherStopped {
+				watchErr = err
+			}
+			break
+		}
+
+		select {
+		case <-r.exit:
+			close(r.eventChan)
+			return nil
+		case r.eventChan <- event:
+		}
+	}
+
+	// close event channel on error
+	close(r.eventChan)
+
+	return watchErr
+}
+
+// publishAdvert publishes router advert to advert channel
+// NOTE: this might cease to be a dedicated method in the future
+func (r *router) publishAdvert(advType AdvertType, events []*Event) {
+	defer r.advertWg.Done()
+
+	a := &Advert{
+		Id:        r.opts.Id,
+		Type:      advType,
+		TTL:       DefaultAdvertTTL,
+		Timestamp: time.Now(),
+		Events:    events,
+	}
+
+	r.RLock()
+	for _, sub := range r.subscribers {
+		// check the exit chan first
+		select {
+		case <-r.exit:
+			r.RUnlock()
+			return
+		default:
+		}
+
+		// now send the message
+		select {
+		case sub <- a:
+		default:
+		}
+	}
+	r.RUnlock()
+}
+
+// advertiseTable advertises the whole routing table to the network
+func (r *router) advertiseTable() error {
+	// create table advertisement ticker
+	ticker := time.NewTicker(AdvertiseTableTick)
+
+	for {
+		select {
+		case <-ticker.C:
+			// list routing table routes to announce
+			routes, err := r.table.List()
+			if err != nil {
+				return fmt.Errorf("failed listing routes: %s", err)
+			}
+			// collect all the added routes before we attempt to add default gateway
+			events := make([]*Event, len(routes))
+			for i, route := range routes {
+				event := &Event{
+					Type:      Update,
+					Timestamp: time.Now(),
+					Route:     route,
+				}
+				events[i] = event
+			}
+
+			// advertise all routes as Update events to subscribers
+			if len(events) > 0 {
+				r.advertWg.Add(1)
+				go r.publishAdvert(RouteUpdate, events)
+			}
+		case <-r.exit:
+			return nil
+		}
+	}
+}
+
+// routeAdvert contains a list of route events to be advertised
+type routeAdvert struct {
+	events []*Event
+	// lastUpdate records the time of the last advert update
+	lastUpdate time.Time
+	// penalty is current advert penalty
+	penalty float64
+	// isSuppressed flags the advert suppression
+	isSuppressed bool
+	// suppressTime records the time interval the advert has been suppressed for
+	suppressTime time.Time
+}
+
+// advertiseEvents advertises routing table events
+// It suppresses unhealthy flapping events and advertises healthy events upstream.
+func (r *router) advertiseEvents() error {
+	// ticker to periodically scan event for advertising
+	ticker := time.NewTicker(AdvertiseEventsTick)
+	// advertMap is a map of advert events
+	advertMap := make(map[uint64]*routeAdvert)
+
+	// routing table watcher
+	tableWatcher, err := r.Watch()
+	if err != nil {
+		return fmt.Errorf("failed creating routing table watcher: %v", err)
+	}
+
+	r.wg.Add(1)
+	go func() {
+		defer r.wg.Done()
+		select {
+		case r.errChan <- r.watchTable(tableWatcher):
+		case <-r.exit:
+		}
+	}()
+
+	for {
+		select {
+		case <-ticker.C:
+			var events []*Event
+			// collect all events which are not flapping
+			for key, advert := range advertMap {
+				// decay the event penalty
+				delta := time.Since(advert.lastUpdate).Seconds()
+				advert.penalty = advert.penalty * math.Exp(-delta*PenaltyDecay)
+
+				// suppress/recover the event based on its penalty level
+				switch {
+				case advert.penalty > AdvertSuppress && !advert.isSuppressed:
+					advert.isSuppressed = true
+					advert.suppressTime = time.Now()
+				case advert.penalty < AdvertRecover && advert.isSuppressed:
+					advert.isSuppressed = false
+				}
+
+				// max suppression time threshold has been reached, delete the advert
+				if advert.isSuppressed {
+					if time.Since(advert.suppressTime) > MaxSuppressTime {
+						delete(advertMap, key)
+						continue
+					}
+				}
+
+				if !advert.isSuppressed {
+					for _, event := range advert.events {
+						e := new(Event)
+						*e = *event
+						events = append(events, e)
+						// delete the advert from the advertMap
+						delete(advertMap, key)
+					}
+				}
+			}
+
+			// advertise all Update events to subscribers
+			if len(events) > 0 {
+				r.advertWg.Add(1)
+				go r.publishAdvert(RouteUpdate, events)
+			}
+		case e := <-r.eventChan:
+			// if event is nil, continue
+			if e == nil {
+				continue
+			}
+
+			// determine the event penalty
+			var penalty float64
+			switch e.Type {
+			case Update:
+				penalty = UpdatePenalty
+			case Delete:
+				penalty = DeletePenalty
+			}
+
+			// check if we have already registered the route
+			// we use the route hash as advertMap key
+			hash := e.Route.Hash()
+			advert, ok := advertMap[hash]
+			if !ok {
+				events := []*Event{e}
+				advert = &routeAdvert{
+					events:     events,
+					penalty:    penalty,
+					lastUpdate: time.Now(),
+				}
+				advertMap[hash] = advert
+				continue
+			}
+
+			// attempt to squash last two events if possible
+			lastEvent := advert.events[len(advert.events)-1]
+			if lastEvent.Type == e.Type {
+				advert.events[len(advert.events)-1] = e
+			} else {
+				advert.events = append(advert.events, e)
+			}
+
+			// update event penalty and recorded timestamp
+			advert.lastUpdate = time.Now()
+			advert.penalty += penalty
+
+		case <-r.exit:
+			// first wait for the advertiser to finish
+			r.advertWg.Wait()
+			return nil
+		}
+	}
+}
+
+// watchErrors watches router errors and takes appropriate actions
+func (r *router) watchErrors() {
+	var err error
+
+	select {
+	case <-r.exit:
+	case err = <-r.errChan:
+	}
+
+	r.Lock()
+	defer r.Unlock()
+	if r.status.Code != Stopped {
+		// notify all goroutines to finish
+		close(r.exit)
+
+		// drain the advertise channel only if advertising
+		if r.status.Code == Advertising {
+			// drain the event channel
+			for range r.eventChan {
+			}
+		}
+
+		// mark the router as Stopped and set its Error to nil
+		r.status = Status{Code: Stopped, Error: nil}
+	}
+
+	if err != nil {
+		r.status = Status{Code: Error, Error: err}
+	}
+}
+
+// Run runs the router.
+func (r *router) run() {
+	r.Lock()
+	defer r.Unlock()
+
+	switch r.status.Code {
+	case Stopped, Error:
+		// add all local service routes into the routing table
+		if err := r.manageRegistryRoutes(r.opts.Registry, "create"); err != nil {
+			r.status = Status{Code: Error, Error: fmt.Errorf("failed adding registry routes: %s", err)}
+			return
+		}
+
+		// add default gateway into routing table
+		if r.opts.Gateway != "" {
+			// note, the only non-default value is the gateway
+			route := Route{
+				Service: "*",
+				Address: "*",
+				Gateway: r.opts.Gateway,
+				Network: "*",
+				Metric:  DefaultLocalMetric,
+			}
+			if err := r.table.Create(route); err != nil {
+				r.status = Status{Code: Error, Error: fmt.Errorf("failed adding default gateway route: %s", err)}
+				return
+			}
+		}
+
+		// create error and exit channels
+		r.errChan = make(chan error, 1)
+		r.exit = make(chan struct{})
+
+		// registry watcher
+		regWatcher, err := r.opts.Registry.Watch()
+		if err != nil {
+			r.status = Status{Code: Error, Error: fmt.Errorf("failed creating registry watcher: %v", err)}
+			return
+		}
+
+		r.wg.Add(1)
+		go func() {
+			defer r.wg.Done()
+			select {
+			case r.errChan <- r.watchRegistry(regWatcher):
+			case <-r.exit:
+			}
+		}()
+
+		// watch for errors and cleanup
+		r.wg.Add(1)
+		go func() {
+			defer r.wg.Done()
+			r.watchErrors()
+		}()
+
+		// mark router as Running and set its Error to nil
+		r.status = Status{Code: Running, Error: nil}
+
+		return
+	}
+
+	return
+}
+
+// Advertise stars advertising the routes to the network and returns the advertisements channel to consume from.
+// If the router is already advertising it returns the channel to consume from.
+// It returns error if either the router is not running or if the routing table fails to list the routes to advertise.
+func (r *router) Advertise() (<-chan *Advert, error) {
+	r.Lock()
+	defer r.Unlock()
+
+	switch r.status.Code {
+	case Advertising:
+		advertChan := make(chan *Advert)
+		r.subscribers[uuid.New().String()] = advertChan
+		return advertChan, nil
+	case Running:
+		// list routing table routes to announce
+		routes, err := r.table.List()
+		if err != nil {
+			return nil, fmt.Errorf("failed listing routes: %s", err)
+		}
+		// collect all the added routes before we attempt to add default gateway
+		events := make([]*Event, len(routes))
+		for i, route := range routes {
+			event := &Event{
+				Type:      Create,
+				Timestamp: time.Now(),
+				Route:     route,
+			}
+			events[i] = event
+		}
+
+		// create event channels
+		r.eventChan = make(chan *Event)
+
+		// advertise your presence
+		r.advertWg.Add(1)
+		go r.publishAdvert(Announce, events)
+
+		r.wg.Add(1)
+		go func() {
+			defer r.wg.Done()
+			select {
+			case r.errChan <- r.advertiseEvents():
+			case <-r.exit:
+			}
+		}()
+
+		r.advertWg.Add(1)
+		go func() {
+			defer r.advertWg.Done()
+			// advertise the whole routing table
+			select {
+			case r.errChan <- r.advertiseTable():
+			case <-r.exit:
+			}
+		}()
+
+		// mark router as Running and set its Error to nil
+		r.status = Status{Code: Advertising, Error: nil}
+
+		// create advert channel
+		advertChan := make(chan *Advert)
+		r.subscribers[uuid.New().String()] = advertChan
+
+		return advertChan, nil
+	case Stopped:
+		return nil, fmt.Errorf("not running")
+	}
+
+	return nil, fmt.Errorf("error: %s", r.status.Error)
+}
+
+// Process updates the routing table using the advertised values
+func (r *router) Process(a *Advert) error {
+	// NOTE: event sorting might not be necessary
+	// copy update events intp new slices
+	events := make([]*Event, len(a.Events))
+	copy(events, a.Events)
+	// sort events by timestamp
+	sort.Slice(events, func(i, j int) bool {
+		return events[i].Timestamp.Before(events[j].Timestamp)
+	})
+
+	for _, event := range events {
+		// create a copy of the route
+		route := event.Route
+		action := event.Type
+		if err := r.manageRoute(route, fmt.Sprintf("%s", action)); err != nil {
+			return fmt.Errorf("failed applying action %s to routing table: %s", action, err)
+		}
+	}
+
+	return nil
+}
+
+func (r *router) Lookup(q Query) ([]Route, error) {
+	return r.table.Query(q)
+}
+
+func (r *router) Watch(opts ...WatchOption) (Watcher, error) {
+	return r.table.Watch(opts...)
+}
+
+// Status returns router status
+func (r *router) Status() Status {
+	r.RLock()
+	defer r.RUnlock()
+
+	// make a copy of the status
+	status := r.status
+
+	return status
+}
+
+// Stop stops the router
+func (r *router) Stop() error {
+	r.Lock()
+	// only close the channel if the router is running and/or advertising
+	if r.status.Code == Running || r.status.Code == Advertising {
+		// notify all goroutines to finish
+		close(r.exit)
+
+		// drain the advertise channel only if advertising
+		if r.status.Code == Advertising {
+			// drain the event channel
+			for range r.eventChan {
+			}
+		}
+
+		// close advert subscribers
+		for id, sub := range r.subscribers {
+			// close the channel
+			close(sub)
+
+			// delete the subscriber
+			delete(r.subscribers, id)
+		}
+
+		// mark the router as Stopped and set its Error to nil
+		r.status = Status{Code: Stopped, Error: nil}
+	}
+	r.Unlock()
+
+	// wait for all goroutines to finish
+	r.wg.Wait()
+
+	return nil
+}
+
+// String prints debugging information about router
+func (r *router) String() string {
+	return "default"
+}

network/router/options.go

@@ -0,0 +1,75 @@
+package router
+
+import (
+	"github.com/google/uuid"
+	"github.com/micro/go-micro/client"
+	"github.com/micro/go-micro/registry"
+)
+
+// Options are router options
+type Options struct {
+	// Id is router id
+	Id string
+	// Address is router address
+	Address string
+	// Gateway is network gateway
+	Gateway string
+	// Network is network address
+	Network string
+	// Registry is the local registry
+	Registry registry.Registry
+	// Client for calling router
+	Client client.Client
+}
+
+// Id sets Router Id
+func Id(id string) Option {
+	return func(o *Options) {
+		o.Id = id
+	}
+}
+
+// Address sets router service address
+func Address(a string) Option {
+	return func(o *Options) {
+		o.Address = a
+	}
+}
+
+// Client to call router service
+func Client(c client.Client) Option {
+	return func(o *Options) {
+		o.Client = c
+	}
+}
+
+// Gateway sets network gateway
+func Gateway(g string) Option {
+	return func(o *Options) {
+		o.Gateway = g
+	}
+}
+
+// Network sets router network
+func Network(n string) Option {
+	return func(o *Options) {
+		o.Network = n
+	}
+}
+
+// Registry sets the local registry
+func Registry(r registry.Registry) Option {
+	return func(o *Options) {
+		o.Registry = r
+	}
+}
+
+// DefaultOptions returns router default options
+func DefaultOptions() Options {
+	return Options{
+		Id:       uuid.New().String(),
+		Address:  DefaultAddress,
+		Network:  DefaultNetwork,
+		Registry: registry.DefaultRegistry,
+	}
+}