move go-micro examples links
This commit is contained in:
Asim Aslam
parent
d4a0b2801f
commit
d1c12e4302
@ -27,7 +27,7 @@ Go Micro abstracts way the details of distributed systems. Here are the main fea
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## Learn By Example
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An example service can be found in [**examples/service**](https://github.com/micro/go-micro/tree/master/examples/service). The [**examples**](https://github.com/micro/go-micro/tree/master/examples) directory contains many more examples for using things such as middleware/wrappers, selector filters, pub/sub and code generation.
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An example service can be found in [**examples/service**](https://github.com/micro/examples/tree/master/service). The [**examples**](https://github.com/micro/examples) directory contains many more examples for using things such as middleware/wrappers, selector filters, pub/sub and code generation.
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For the complete greeter example look at [**examples/greeter**](https://github.com/micro/examples/tree/master/greeter). Other examples can be found throughout the GitHub repository.
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@ -123,7 +123,7 @@ There's still a need for proto compiler to generate Go stub code from our proto
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```shell
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protoc -I$GOPATH/src --go_out=plugins=micro:$GOPATH/src \
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$GOPATH/src/github.com/micro/go-micro/examples/service/proto/greeter.proto
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$GOPATH/src/github.com/micro/examples/service/proto/greeter.proto
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```
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### Define the service
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@ -140,7 +140,7 @@ import (
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"fmt"
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micro "github.com/micro/go-micro"
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proto "github.com/micro/go-micro/examples/service/proto"
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proto "github.com/micro/examples/service/proto"
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"golang.org/x/net/context"
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)
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@ -198,7 +198,7 @@ import (
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"fmt"
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micro "github.com/micro/go-micro"
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proto "github.com/micro/go-micro/examples/service/proto"
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proto "github.com/micro/examples/service/proto"
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"golang.org/x/net/context"
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)
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@ -1,30 +0,0 @@
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# Examples
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This directory contains example usage of Micro
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**Client** contains examples usage of the Client package to call a service.
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- main.go - calls each of the go.micro.srv.example handlers and includes the use of the streaming handler
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- codegen - demonstrates how to use code generation to remove boilerplate code
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- dc_filter - shows how to use Select filters inside a call wrapper for filtering to the local DC
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- dc_selector - is the same as dc_filter but as a Selector implementation itself
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- pub - publishes messages using the Publish method. By default encoding in protobuf
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- selector - shows how to write and load your own Selector
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- wrapper - provides examples for how to use client Wrappers (middleware)
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**PubSub** contains an example of using the Broker for Publish and Subscribing.
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- main.go - demonstrates simple runs pub-sub as two go routines running for 10 seconds.
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- producer - publishes messages to the broker every second
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- consumer - consumes any messages sent by the producer
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**Server** contains example usage of the Server package to server requests.
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- main.go - initialises and runs the the server
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- handler - is an example RPC request handler for the Server
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- proto - contains the protobuf defintion for the Server API
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- subscriber - is a handler for subscribing via the Server
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- wrapper - demonstrates use of a server HandlerWrapper
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- codegen - shows how to use codegenerated registration to reduce boilerplate
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**Service** contains example usage of the top level Service in go-micro.
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- main.go - is the main definition of the service, handler and client
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- proto - contains the protobuf definition of the API
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- wrapper - demonstrates the use of Client and Server Wrappers
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@ -1,150 +0,0 @@
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# Code Generation [Experimental]
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We're experimenting with code generation to reduce the amount of boiler plate code written.
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## Example
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Going from this
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```golang
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req := client.NewRequest("go.micro.srv.example", "Example.Call", &example.Request{
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Name: "John",
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})
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rsp := &example.Response{}
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if err := client.Call(context.Background(), req, rsp); err != nil {
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return err
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}
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```
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To
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```golang
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rsp, err := cl.Call(context.Background(), &example.Request{Name: "John"})
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if err != nil {
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return err
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}
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```
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## Generation of stub code for the example service
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```shell
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go get github.com/micro/protobuf/protoc-gen-go
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cd examples/server/proto/example
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protoc --go_out=plugins=micro:. example.proto
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```
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Look at examples/server/proto/example/example.pb.go
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to see the generated code.
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## Guide
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### Download the protoc-gen-go code
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```shell
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go get github.com/micro/protobuf/protoc-gen-go
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```
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### Define your proto service.
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hello.proto
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```shell
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syntax = "proto3";
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// package name is used as the service name for discovery
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// if service name is not passed in when initialising the
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// client
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package go.micro.srv.greeter;
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service Say {
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rpc Hello(Request) returns (Response) {}
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}
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message Request {
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optional string name = 1;
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}
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message Response {
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optional string msg = 1;
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}
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```
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**Note: Remember to set package name in the proto, it's used to generate
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the service for discovery.**
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### Generate code
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```shell
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protoc --go_out=plugins=micro:. hello.proto
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```
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### Generated code
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```shell
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// Client API for Say service
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type SayClient interface {
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Hello(ctx context.Context, in *Request) (*Response, error)
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}
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type sayClient struct {
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c client.Client
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serviceName string
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}
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func NewSayClient(serviceName string, c client.Client) SayClient {
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if c == nil {
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c = client.NewClient()
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}
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if len(serviceName) == 0 {
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serviceName = "go.micro.srv.greeter"
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}
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return &sayClient{
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c: c,
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serviceName: serviceName,
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}
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}
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func (c *sayClient) Hello(ctx context.Context, in *Request) (*Response, error) {
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req := c.c.NewRequest(c.serviceName, "Say.Hello", in)
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out := new(Response)
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err := c.c.Call(ctx, req, out)
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if err != nil {
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return nil, err
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}
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return out, nil
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}
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// Server API for Say service
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type SayHandler interface {
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Hello(context.Context, *Request, *Response) error
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}
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func RegisterSayHandler(s server.Server, hdlr SayHandler) {
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s.Handle(s.NewHandler(hdlr))
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}
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```
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### Use the client
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```golang
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import (
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"fmt"
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"golang.org/x/net/context"
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"github.com/micro/go-micro/client"
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hello "path/to/hello/proto"
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)
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func main() {
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cl := hello.NewSayClient("go.micro.srv.greeter", client.DefaultClient)
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// alternative initialisation
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// cl := hello.NewSayClient("", nil)
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rsp, err := cl.Hello(contex.Background(), &hello.Request{"Name": "John"})
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if err != nil {
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fmt.Println(err)
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}
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}
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```
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@ -1,79 +0,0 @@
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package main
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import (
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"fmt"
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"github.com/micro/go-micro/cmd"
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example "github.com/micro/go-micro/examples/server/proto/example"
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"golang.org/x/net/context"
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)
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var (
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cl = example.NewExampleClient("go.micro.srv.example", nil)
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)
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func call(i int) {
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rsp, err := cl.Call(context.Background(), &example.Request{Name: "John"})
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if err != nil {
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fmt.Println("call err: ", err, rsp)
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return
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}
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fmt.Println("Call:", i, "rsp:", rsp.Msg)
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}
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func stream(i int) {
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stream, err := cl.Stream(context.Background(), &example.StreamingRequest{Count: int64(i)})
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if err != nil {
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fmt.Println("err:", err)
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return
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}
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for j := 0; j < i; j++ {
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rsp, err := stream.Recv()
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if err != nil {
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fmt.Println("err:", err)
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break
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}
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fmt.Println("Stream: rsp:", rsp.Count)
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}
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if err := stream.Close(); err != nil {
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fmt.Println("stream close err:", err)
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}
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}
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func pingPong(i int) {
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stream, err := cl.PingPong(context.Background())
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if err != nil {
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fmt.Println("err:", err)
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return
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}
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for j := 0; j < i; j++ {
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if err := stream.Send(&example.Ping{Stroke: int64(j)}); err != nil {
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fmt.Println("err:", err)
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return
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}
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rsp, err := stream.Recv()
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if err != nil {
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fmt.Println("recv err", err)
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break
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}
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fmt.Printf("Sent ping %v got pong %v\n", j, rsp.Stroke)
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}
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if err := stream.Close(); err != nil {
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fmt.Println("stream close err:", err)
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}
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}
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func main() {
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cmd.Init()
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fmt.Println("\n--- Call example ---\n")
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for i := 0; i < 10; i++ {
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call(i)
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}
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fmt.Println("\n--- Streamer example ---\n")
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stream(10)
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fmt.Println("\n--- Ping Pong example ---\n")
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pingPong(10)
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}
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@ -1,88 +0,0 @@
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package main
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import (
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"fmt"
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"math/rand"
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"time"
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"github.com/micro/go-micro/client"
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"github.com/micro/go-micro/cmd"
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"github.com/micro/go-micro/metadata"
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"github.com/micro/go-micro/registry"
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"github.com/micro/go-micro/selector"
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"golang.org/x/net/context"
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example "github.com/micro/go-micro/examples/server/proto/example"
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)
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func init() {
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rand.Seed(time.Now().Unix())
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}
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// A Wrapper that creates a Datacenter Selector Option
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type dcWrapper struct {
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client.Client
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}
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func (dc *dcWrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
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md, _ := metadata.FromContext(ctx)
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filter := func(services []*registry.Service) []*registry.Service {
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for _, service := range services {
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var nodes []*registry.Node
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for _, node := range service.Nodes {
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if node.Metadata["datacenter"] == md["datacenter"] {
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nodes = append(nodes, node)
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}
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}
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service.Nodes = nodes
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}
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return services
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}
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callOptions := append(opts, client.WithSelectOption(
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selector.WithFilter(filter),
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))
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fmt.Printf("[DC Wrapper] filtering for datacenter %s\n", md["datacenter"])
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return dc.Client.Call(ctx, req, rsp, callOptions...)
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}
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func NewDCWrapper(c client.Client) client.Client {
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return &dcWrapper{c}
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}
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func call(i int) {
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// Create new request to service go.micro.srv.example, method Example.Call
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req := client.NewRequest("go.micro.srv.example", "Example.Call", &example.Request{
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Name: "John",
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})
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// create context with metadata
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ctx := metadata.NewContext(context.Background(), map[string]string{
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"datacenter": "local",
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})
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rsp := &example.Response{}
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// Call service
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if err := client.Call(ctx, req, rsp); err != nil {
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fmt.Println("call err: ", err, rsp)
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return
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}
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fmt.Println("Call:", i, "rsp:", rsp.Msg)
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}
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func main() {
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cmd.Init()
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client.DefaultClient = client.NewClient(
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client.Wrap(NewDCWrapper),
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)
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fmt.Println("\n--- Call example ---\n")
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for i := 0; i < 10; i++ {
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call(i)
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}
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}
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@ -1,134 +0,0 @@
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package main
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import (
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"fmt"
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"math/rand"
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"sync"
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"time"
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"github.com/micro/go-micro/client"
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"github.com/micro/go-micro/cmd"
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"github.com/micro/go-micro/registry"
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"github.com/micro/go-micro/selector"
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"golang.org/x/net/context"
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example "github.com/micro/go-micro/examples/server/proto/example"
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)
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// Built in random hashed node selector
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type dcSelector struct {
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opts selector.Options
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}
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var (
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datacenter = "local"
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)
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func init() {
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rand.Seed(time.Now().Unix())
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}
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func (n *dcSelector) Init(opts ...selector.Option) error {
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for _, o := range opts {
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o(&n.opts)
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}
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return nil
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}
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func (n *dcSelector) Options() selector.Options {
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return n.opts
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}
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func (n *dcSelector) Select(service string, opts ...selector.SelectOption) (selector.Next, error) {
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services, err := n.opts.Registry.GetService(service)
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if err != nil {
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return nil, err
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}
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if len(services) == 0 {
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return nil, selector.ErrNotFound
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}
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var nodes []*registry.Node
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// Filter the nodes for datacenter
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for _, service := range services {
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for _, node := range service.Nodes {
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if node.Metadata["datacenter"] == datacenter {
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nodes = append(nodes, node)
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}
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}
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}
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if len(nodes) == 0 {
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return nil, selector.ErrNotFound
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}
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var i int
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var mtx sync.Mutex
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return func() (*registry.Node, error) {
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mtx.Lock()
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defer mtx.Unlock()
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i++
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return nodes[i%len(nodes)], nil
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}, nil
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}
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func (n *dcSelector) Mark(service string, node *registry.Node, err error) {
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return
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}
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func (n *dcSelector) Reset(service string) {
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return
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}
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func (n *dcSelector) Close() error {
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return nil
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}
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func (n *dcSelector) String() string {
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return "dc"
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}
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// Return a new first node selector
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func DCSelector(opts ...selector.Option) selector.Selector {
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var sopts selector.Options
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for _, opt := range opts {
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opt(&sopts)
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}
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if sopts.Registry == nil {
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sopts.Registry = registry.DefaultRegistry
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}
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return &dcSelector{sopts}
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}
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func call(i int) {
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// Create new request to service go.micro.srv.example, method Example.Call
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req := client.NewRequest("go.micro.srv.example", "Example.Call", &example.Request{
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Name: "John",
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})
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rsp := &example.Response{}
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// Call service
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if err := client.Call(context.Background(), req, rsp); err != nil {
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fmt.Println("call err: ", err, rsp)
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return
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}
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fmt.Println("Call:", i, "rsp:", rsp.Msg)
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}
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func main() {
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cmd.Init()
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client.DefaultClient = client.NewClient(
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client.Selector(DCSelector()),
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)
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fmt.Println("\n--- Call example ---\n")
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for i := 0; i < 10; i++ {
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call(i)
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}
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}
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@ -1,143 +0,0 @@
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package main
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import (
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"fmt"
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|
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"github.com/micro/go-micro/client"
|
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"github.com/micro/go-micro/cmd"
|
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example "github.com/micro/go-micro/examples/server/proto/example"
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"github.com/micro/go-micro/metadata"
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"golang.org/x/net/context"
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)
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// publishes a message
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func pub() {
|
||||
msg := client.NewPublication("topic.go.micro.srv.example", &example.Message{
|
||||
Say: "This is a publication",
|
||||
})
|
||||
|
||||
// create context with metadata
|
||||
ctx := metadata.NewContext(context.Background(), map[string]string{
|
||||
"X-User-Id": "john",
|
||||
"X-From-Id": "script",
|
||||
})
|
||||
|
||||
// publish message
|
||||
if err := client.Publish(ctx, msg); err != nil {
|
||||
fmt.Println("pub err: ", err)
|
||||
return
|
||||
}
|
||||
|
||||
fmt.Printf("Published: %v\n", msg)
|
||||
}
|
||||
|
||||
func call(i int) {
|
||||
// Create new request to service go.micro.srv.example, method Example.Call
|
||||
req := client.NewRequest("go.micro.srv.example", "Example.Call", &example.Request{
|
||||
Name: "John",
|
||||
})
|
||||
|
||||
// create context with metadata
|
||||
ctx := metadata.NewContext(context.Background(), map[string]string{
|
||||
"X-User-Id": "john",
|
||||
"X-From-Id": "script",
|
||||
})
|
||||
|
||||
rsp := &example.Response{}
|
||||
|
||||
// Call service
|
||||
if err := client.Call(ctx, req, rsp); err != nil {
|
||||
fmt.Println("call err: ", err, rsp)
|
||||
return
|
||||
}
|
||||
|
||||
fmt.Println("Call:", i, "rsp:", rsp.Msg)
|
||||
}
|
||||
|
||||
func stream(i int) {
|
||||
// Create new request to service go.micro.srv.example, method Example.Call
|
||||
// Request can be empty as its actually ignored and merely used to call the handler
|
||||
req := client.NewRequest("go.micro.srv.example", "Example.Stream", &example.StreamingRequest{})
|
||||
|
||||
stream, err := client.Stream(context.Background(), req)
|
||||
if err != nil {
|
||||
fmt.Println("err:", err)
|
||||
return
|
||||
}
|
||||
if err := stream.Send(&example.StreamingRequest{Count: int64(i)}); err != nil {
|
||||
fmt.Println("err:", err)
|
||||
return
|
||||
}
|
||||
for stream.Error() == nil {
|
||||
rsp := &example.StreamingResponse{}
|
||||
err := stream.Recv(rsp)
|
||||
if err != nil {
|
||||
fmt.Println("recv err", err)
|
||||
break
|
||||
}
|
||||
fmt.Println("Stream: rsp:", rsp.Count)
|
||||
}
|
||||
|
||||
if stream.Error() != nil {
|
||||
fmt.Println("stream err:", err)
|
||||
return
|
||||
}
|
||||
|
||||
if err := stream.Close(); err != nil {
|
||||
fmt.Println("stream close err:", err)
|
||||
}
|
||||
}
|
||||
|
||||
func pingPong(i int) {
|
||||
// Create new request to service go.micro.srv.example, method Example.Call
|
||||
// Request can be empty as its actually ignored and merely used to call the handler
|
||||
req := client.NewRequest("go.micro.srv.example", "Example.PingPong", &example.StreamingRequest{})
|
||||
|
||||
stream, err := client.Stream(context.Background(), req)
|
||||
if err != nil {
|
||||
fmt.Println("err:", err)
|
||||
return
|
||||
}
|
||||
|
||||
for j := 0; j < i; j++ {
|
||||
if err := stream.Send(&example.Ping{Stroke: int64(j + 1)}); err != nil {
|
||||
fmt.Println("err:", err)
|
||||
return
|
||||
}
|
||||
rsp := &example.Pong{}
|
||||
err := stream.Recv(rsp)
|
||||
if err != nil {
|
||||
fmt.Println("recv err", err)
|
||||
break
|
||||
}
|
||||
fmt.Printf("Sent ping %v got pong %v\n", j+1, rsp.Stroke)
|
||||
}
|
||||
|
||||
if stream.Error() != nil {
|
||||
fmt.Println("stream err:", err)
|
||||
return
|
||||
}
|
||||
|
||||
if err := stream.Close(); err != nil {
|
||||
fmt.Println("stream close err:", err)
|
||||
}
|
||||
}
|
||||
|
||||
func main() {
|
||||
cmd.Init()
|
||||
|
||||
fmt.Println("\n--- Publisher example ---\n")
|
||||
pub()
|
||||
|
||||
fmt.Println("\n--- Call example ---\n")
|
||||
for i := 0; i < 10; i++ {
|
||||
call(i)
|
||||
}
|
||||
|
||||
fmt.Println("\n--- Streamer example ---\n")
|
||||
stream(10)
|
||||
|
||||
fmt.Println("\n--- Ping Pong example ---\n")
|
||||
pingPong(10)
|
||||
|
||||
}
|
||||
@ -1,40 +0,0 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
|
||||
"github.com/micro/go-micro/client"
|
||||
"github.com/micro/go-micro/cmd"
|
||||
example "github.com/micro/go-micro/examples/server/proto/example"
|
||||
"github.com/micro/go-micro/metadata"
|
||||
"golang.org/x/net/context"
|
||||
)
|
||||
|
||||
// publishes a message
|
||||
func pub(i int) {
|
||||
msg := client.NewPublication("topic.go.micro.srv.example", &example.Message{
|
||||
Say: fmt.Sprintf("This is a publication %d", i),
|
||||
})
|
||||
|
||||
// create context with metadata
|
||||
ctx := metadata.NewContext(context.Background(), map[string]string{
|
||||
"X-User-Id": "john",
|
||||
"X-From-Id": "script",
|
||||
})
|
||||
|
||||
// publish message
|
||||
if err := client.Publish(ctx, msg); err != nil {
|
||||
fmt.Println("pub err: ", err)
|
||||
return
|
||||
}
|
||||
|
||||
fmt.Printf("Published %d: %v\n", i, msg)
|
||||
}
|
||||
|
||||
func main() {
|
||||
cmd.Init()
|
||||
fmt.Println("\n--- Publisher example ---\n")
|
||||
for i := 0; i < 10; i++ {
|
||||
pub(i)
|
||||
}
|
||||
}
|
||||
@ -1,124 +0,0 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"math/rand"
|
||||
"time"
|
||||
|
||||
"github.com/micro/go-micro/client"
|
||||
"github.com/micro/go-micro/cmd"
|
||||
example "github.com/micro/go-micro/examples/server/proto/example"
|
||||
"github.com/micro/go-micro/registry"
|
||||
"github.com/micro/go-micro/selector"
|
||||
"golang.org/x/net/context"
|
||||
)
|
||||
|
||||
func init() {
|
||||
rand.Seed(time.Now().Unix())
|
||||
}
|
||||
|
||||
// Built in random hashed node selector
|
||||
type firstNodeSelector struct {
|
||||
opts selector.Options
|
||||
}
|
||||
|
||||
func (n *firstNodeSelector) Init(opts ...selector.Option) error {
|
||||
for _, o := range opts {
|
||||
o(&n.opts)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (n *firstNodeSelector) Options() selector.Options {
|
||||
return n.opts
|
||||
}
|
||||
|
||||
func (n *firstNodeSelector) Select(service string, opts ...selector.SelectOption) (selector.Next, error) {
|
||||
services, err := n.opts.Registry.GetService(service)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if len(services) == 0 {
|
||||
return nil, selector.ErrNotFound
|
||||
}
|
||||
|
||||
var sopts selector.SelectOptions
|
||||
for _, opt := range opts {
|
||||
opt(&sopts)
|
||||
}
|
||||
|
||||
for _, filter := range sopts.Filters {
|
||||
services = filter(services)
|
||||
}
|
||||
|
||||
if len(services) == 0 {
|
||||
return nil, selector.ErrNotFound
|
||||
}
|
||||
|
||||
if len(services[0].Nodes) == 0 {
|
||||
return nil, selector.ErrNotFound
|
||||
}
|
||||
|
||||
return func() (*registry.Node, error) {
|
||||
return services[0].Nodes[0], nil
|
||||
}, nil
|
||||
}
|
||||
|
||||
func (n *firstNodeSelector) Mark(service string, node *registry.Node, err error) {
|
||||
return
|
||||
}
|
||||
|
||||
func (n *firstNodeSelector) Reset(service string) {
|
||||
return
|
||||
}
|
||||
|
||||
func (n *firstNodeSelector) Close() error {
|
||||
return nil
|
||||
}
|
||||
|
||||
func (n *firstNodeSelector) String() string {
|
||||
return "first"
|
||||
}
|
||||
|
||||
// Return a new first node selector
|
||||
func FirstNodeSelector(opts ...selector.Option) selector.Selector {
|
||||
var sopts selector.Options
|
||||
for _, opt := range opts {
|
||||
opt(&sopts)
|
||||
}
|
||||
if sopts.Registry == nil {
|
||||
sopts.Registry = registry.DefaultRegistry
|
||||
}
|
||||
return &firstNodeSelector{sopts}
|
||||
}
|
||||
|
||||
func call(i int) {
|
||||
// Create new request to service go.micro.srv.example, method Example.Call
|
||||
req := client.NewRequest("go.micro.srv.example", "Example.Call", &example.Request{
|
||||
Name: "John",
|
||||
})
|
||||
|
||||
rsp := &example.Response{}
|
||||
|
||||
// Call service
|
||||
if err := client.Call(context.Background(), req, rsp); err != nil {
|
||||
fmt.Println("call err: ", err, rsp)
|
||||
return
|
||||
}
|
||||
|
||||
fmt.Println("Call:", i, "rsp:", rsp.Msg)
|
||||
}
|
||||
|
||||
func main() {
|
||||
cmd.Init()
|
||||
|
||||
client.DefaultClient = client.NewClient(
|
||||
client.Selector(FirstNodeSelector()),
|
||||
)
|
||||
|
||||
fmt.Println("\n--- Call example ---\n")
|
||||
for i := 0; i < 10; i++ {
|
||||
call(i)
|
||||
}
|
||||
}
|
||||
@ -1,109 +0,0 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"time"
|
||||
|
||||
"github.com/micro/go-micro/client"
|
||||
"github.com/micro/go-micro/cmd"
|
||||
example "github.com/micro/go-micro/examples/server/proto/example"
|
||||
"github.com/micro/go-micro/metadata"
|
||||
"golang.org/x/net/context"
|
||||
)
|
||||
|
||||
// wrapper example code
|
||||
|
||||
// log wrapper logs every time a request is made
|
||||
type logWrapper struct {
|
||||
client.Client
|
||||
}
|
||||
|
||||
func (l *logWrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
|
||||
md, _ := metadata.FromContext(ctx)
|
||||
fmt.Printf("[Log Wrapper] ctx: %v service: %s method: %s\n", md, req.Service(), req.Method())
|
||||
return l.Client.Call(ctx, req, rsp)
|
||||
}
|
||||
|
||||
// trace wrapper attaches a unique trace ID - timestamp
|
||||
type traceWrapper struct {
|
||||
client.Client
|
||||
}
|
||||
|
||||
func (t *traceWrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
|
||||
ctx = metadata.NewContext(ctx, map[string]string{
|
||||
"X-Trace-Id": fmt.Sprintf("%d", time.Now().Unix()),
|
||||
})
|
||||
return t.Client.Call(ctx, req, rsp)
|
||||
}
|
||||
|
||||
// Implements client.Wrapper as logWrapper
|
||||
func logWrap(c client.Client) client.Client {
|
||||
return &logWrapper{c}
|
||||
}
|
||||
|
||||
// Implements client.Wrapper as traceWrapper
|
||||
func traceWrap(c client.Client) client.Client {
|
||||
return &traceWrapper{c}
|
||||
}
|
||||
|
||||
func metricsWrap(cf client.CallFunc) client.CallFunc {
|
||||
return func(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error {
|
||||
t := time.Now()
|
||||
err := cf(ctx, addr, req, rsp, opts)
|
||||
fmt.Printf("[Metrics Wrapper] called: %s %s.%s duration: %v\n", addr, req.Service(), req.Method(), time.Since(t))
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
func call(i int) {
|
||||
// Create new request to service go.micro.srv.example, method Example.Call
|
||||
req := client.NewRequest("go.micro.srv.example", "Example.Call", &example.Request{
|
||||
Name: "John",
|
||||
})
|
||||
|
||||
// create context with metadata
|
||||
ctx := metadata.NewContext(context.Background(), map[string]string{
|
||||
"X-User-Id": "john",
|
||||
"X-From-Id": "script",
|
||||
})
|
||||
|
||||
rsp := &example.Response{}
|
||||
|
||||
// Call service
|
||||
if err := client.Call(ctx, req, rsp); err != nil {
|
||||
fmt.Println("call err: ", err, rsp)
|
||||
return
|
||||
}
|
||||
|
||||
fmt.Println("Call:", i, "rsp:", rsp.Msg)
|
||||
}
|
||||
|
||||
func main() {
|
||||
cmd.Init()
|
||||
|
||||
fmt.Println("\n--- Log Wrapper example ---\n")
|
||||
|
||||
// Wrap the default client
|
||||
client.DefaultClient = logWrap(client.DefaultClient)
|
||||
|
||||
call(0)
|
||||
|
||||
fmt.Println("\n--- Log+Trace Wrapper example ---\n")
|
||||
|
||||
// Wrap using client.Wrap option
|
||||
client.DefaultClient = client.NewClient(
|
||||
client.Wrap(traceWrap),
|
||||
client.Wrap(logWrap),
|
||||
)
|
||||
|
||||
call(1)
|
||||
|
||||
fmt.Println("\n--- Metrics Wrapper example ---\n")
|
||||
|
||||
// Wrap using client.Wrap option
|
||||
client.DefaultClient = client.NewClient(
|
||||
client.WrapCall(metricsWrap),
|
||||
)
|
||||
|
||||
call(2)
|
||||
}
|
||||
@ -1,51 +0,0 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"log"
|
||||
|
||||
"github.com/micro/go-micro/broker"
|
||||
"github.com/micro/go-micro/cmd"
|
||||
// To enable rabbitmq plugin uncomment
|
||||
//_ "github.com/micro/go-plugins/broker/rabbitmq"
|
||||
)
|
||||
|
||||
var (
|
||||
topic = "go.micro.topic.foo"
|
||||
)
|
||||
|
||||
// Example of a shared subscription which receives a subset of messages
|
||||
func sharedSub() {
|
||||
_, err := broker.Subscribe(topic, func(p broker.Publication) error {
|
||||
fmt.Println("[sub] received message:", string(p.Message().Body), "header", p.Message().Header)
|
||||
return nil
|
||||
}, broker.Queue("consumer"))
|
||||
if err != nil {
|
||||
fmt.Println(err)
|
||||
}
|
||||
}
|
||||
|
||||
// Example of a subscription which receives all the messages
|
||||
func sub() {
|
||||
_, err := broker.Subscribe(topic, func(p broker.Publication) error {
|
||||
fmt.Println("[sub] received message:", string(p.Message().Body), "header", p.Message().Header)
|
||||
return nil
|
||||
})
|
||||
if err != nil {
|
||||
fmt.Println(err)
|
||||
}
|
||||
}
|
||||
|
||||
func main() {
|
||||
cmd.Init()
|
||||
|
||||
if err := broker.Init(); err != nil {
|
||||
log.Fatalf("Broker Init error: %v", err)
|
||||
}
|
||||
if err := broker.Connect(); err != nil {
|
||||
log.Fatalf("Broker Connect error: %v", err)
|
||||
}
|
||||
|
||||
sub()
|
||||
select {}
|
||||
}
|
||||
@ -1,59 +0,0 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"log"
|
||||
"time"
|
||||
|
||||
"github.com/micro/go-micro/broker"
|
||||
"github.com/micro/go-micro/cmd"
|
||||
)
|
||||
|
||||
var (
|
||||
topic = "go.micro.topic.foo"
|
||||
)
|
||||
|
||||
func pub() {
|
||||
tick := time.NewTicker(time.Second)
|
||||
i := 0
|
||||
for _ = range tick.C {
|
||||
msg := &broker.Message{
|
||||
Header: map[string]string{
|
||||
"id": fmt.Sprintf("%d", i),
|
||||
},
|
||||
Body: []byte(fmt.Sprintf("%d: %s", i, time.Now().String())),
|
||||
}
|
||||
if err := broker.Publish(topic, msg); err != nil {
|
||||
log.Printf("[pub] failed: %v", err)
|
||||
} else {
|
||||
fmt.Println("[pub] pubbed message:", string(msg.Body))
|
||||
}
|
||||
i++
|
||||
}
|
||||
}
|
||||
|
||||
func sub() {
|
||||
_, err := broker.Subscribe(topic, func(p broker.Publication) error {
|
||||
fmt.Println("[sub] received message:", string(p.Message().Body), "header", p.Message().Header)
|
||||
return nil
|
||||
})
|
||||
if err != nil {
|
||||
fmt.Println(err)
|
||||
}
|
||||
}
|
||||
|
||||
func main() {
|
||||
cmd.Init()
|
||||
|
||||
if err := broker.Init(); err != nil {
|
||||
log.Fatalf("Broker Init error: %v", err)
|
||||
}
|
||||
if err := broker.Connect(); err != nil {
|
||||
log.Fatalf("Broker Connect error: %v", err)
|
||||
}
|
||||
|
||||
go pub()
|
||||
go sub()
|
||||
|
||||
<-time.After(time.Second * 10)
|
||||
}
|
||||
@ -1,49 +0,0 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"log"
|
||||
"time"
|
||||
|
||||
"github.com/micro/go-micro/broker"
|
||||
"github.com/micro/go-micro/cmd"
|
||||
// To enable rabbitmq plugin uncomment
|
||||
//_ "github.com/micro/go-plugins/broker/rabbitmq"
|
||||
)
|
||||
|
||||
var (
|
||||
topic = "go.micro.topic.foo"
|
||||
)
|
||||
|
||||
func pub() {
|
||||
tick := time.NewTicker(time.Second)
|
||||
i := 0
|
||||
for _ = range tick.C {
|
||||
msg := &broker.Message{
|
||||
Header: map[string]string{
|
||||
"id": fmt.Sprintf("%d", i),
|
||||
},
|
||||
Body: []byte(fmt.Sprintf("%d: %s", i, time.Now().String())),
|
||||
}
|
||||
if err := broker.Publish(topic, msg); err != nil {
|
||||
log.Printf("[pub] failed: %v", err)
|
||||
} else {
|
||||
fmt.Println("[pub] pubbed message:", string(msg.Body))
|
||||
}
|
||||
i++
|
||||
}
|
||||
}
|
||||
|
||||
func main() {
|
||||
cmd.Init()
|
||||
|
||||
if err := broker.Init(); err != nil {
|
||||
log.Fatalf("Broker Init error: %v", err)
|
||||
}
|
||||
|
||||
if err := broker.Connect(); err != nil {
|
||||
log.Fatalf("Broker Connect error: %v", err)
|
||||
}
|
||||
|
||||
pub()
|
||||
}
|
||||
@ -1,5 +0,0 @@
|
||||
# Build binary with the following command
|
||||
# CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -ldflags '-w' -o server ./main.go
|
||||
FROM alpine:3.2
|
||||
ADD server /
|
||||
ENTRYPOINT [ "/server" ]
|
||||
@ -1,27 +0,0 @@
|
||||
# Example Service
|
||||
|
||||
An example Go service running with go-micro
|
||||
|
||||
### Prerequisites
|
||||
|
||||
Install Consul
|
||||
[https://www.consul.io/intro/getting-started/install.html](https://www.consul.io/intro/getting-started/install.html)
|
||||
|
||||
Run Consul
|
||||
```
|
||||
$ consul agent -dev -advertise=127.0.0.1
|
||||
```
|
||||
|
||||
Run Service
|
||||
```
|
||||
$ go run server/main.go
|
||||
I0525 18:06:14.471489 83304 server.go:117] Starting server go.micro.srv.example id go.micro.srv.example-59b6e0ab-0300-11e5-b696-68a86d0d36b6
|
||||
I0525 18:06:14.474960 83304 rpc_server.go:126] Listening on [::]:62216
|
||||
I0525 18:06:14.474997 83304 server.go:99] Registering node: go.micro.srv.example-59b6e0ab-0300-11e5-b696-68a86d0d36b6
|
||||
```
|
||||
|
||||
Test Service
|
||||
```
|
||||
$ go run client/main.go
|
||||
go.micro.srv.example-59b6e0ab-0300-11e5-b696-68a86d0d36b6: Hello John
|
||||
```
|
||||
@ -1,83 +0,0 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"log"
|
||||
|
||||
"github.com/micro/go-micro/cmd"
|
||||
"github.com/micro/go-micro/examples/server/subscriber"
|
||||
"github.com/micro/go-micro/server"
|
||||
"golang.org/x/net/context"
|
||||
|
||||
example "github.com/micro/go-micro/examples/server/proto/example"
|
||||
)
|
||||
|
||||
type Example struct{}
|
||||
|
||||
func (e *Example) Call(ctx context.Context, req *example.Request, rsp *example.Response) error {
|
||||
log.Print("Received Example.Call request")
|
||||
rsp.Msg = server.DefaultOptions().Id + ": Hello " + req.Name
|
||||
return nil
|
||||
}
|
||||
|
||||
func (e *Example) Stream(ctx context.Context, req *example.StreamingRequest, stream example.Example_StreamStream) error {
|
||||
log.Printf("Received Example.Stream request with count: %d", req.Count)
|
||||
|
||||
for i := 0; i < int(req.Count); i++ {
|
||||
log.Printf("Responding: %d", i)
|
||||
if err := stream.Send(&example.StreamingResponse{
|
||||
Count: int64(i),
|
||||
}); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (e *Example) PingPong(ctx context.Context, stream example.Example_PingPongStream) error {
|
||||
for {
|
||||
req, err := stream.Recv()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
log.Printf("Got ping %v", req.Stroke)
|
||||
if err := stream.Send(&example.Pong{Stroke: req.Stroke}); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func main() {
|
||||
// optionally setup command line usage
|
||||
cmd.Init()
|
||||
|
||||
// Initialise Server
|
||||
server.Init(
|
||||
server.Name("go.micro.srv.example"),
|
||||
)
|
||||
|
||||
// Register Subscribers
|
||||
server.Subscribe(
|
||||
server.NewSubscriber(
|
||||
"topic.go.micro.srv.example",
|
||||
new(subscriber.Example),
|
||||
),
|
||||
)
|
||||
|
||||
server.Subscribe(
|
||||
server.NewSubscriber(
|
||||
"topic.go.micro.srv.example",
|
||||
subscriber.Handler,
|
||||
),
|
||||
)
|
||||
|
||||
// Register Handler
|
||||
example.RegisterExampleHandler(
|
||||
server.DefaultServer, new(Example),
|
||||
)
|
||||
|
||||
// Run server
|
||||
if err := server.Run(); err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
}
|
||||
@ -1,58 +0,0 @@
|
||||
package handler
|
||||
|
||||
import (
|
||||
"log"
|
||||
|
||||
example "github.com/micro/go-micro/examples/server/proto/example"
|
||||
"github.com/micro/go-micro/metadata"
|
||||
"github.com/micro/go-micro/server"
|
||||
|
||||
"golang.org/x/net/context"
|
||||
)
|
||||
|
||||
type Example struct{}
|
||||
|
||||
func (e *Example) Call(ctx context.Context, req *example.Request, rsp *example.Response) error {
|
||||
md, _ := metadata.FromContext(ctx)
|
||||
log.Printf("Received Example.Call request with metadata: %v", md)
|
||||
rsp.Msg = server.DefaultOptions().Id + ": Hello " + req.Name
|
||||
return nil
|
||||
}
|
||||
|
||||
func (e *Example) Stream(ctx context.Context, stream server.Streamer) error {
|
||||
log.Print("Executing streaming handler")
|
||||
req := &example.StreamingRequest{}
|
||||
|
||||
// We just want to receive 1 request and then process here
|
||||
if err := stream.Recv(req); err != nil {
|
||||
log.Printf("Error receiving streaming request: %v", err)
|
||||
return err
|
||||
}
|
||||
|
||||
log.Printf("Received Example.Stream request with count: %d", req.Count)
|
||||
|
||||
for i := 0; i < int(req.Count); i++ {
|
||||
log.Printf("Responding: %d", i)
|
||||
|
||||
if err := stream.Send(&example.StreamingResponse{
|
||||
Count: int64(i),
|
||||
}); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (e *Example) PingPong(ctx context.Context, stream server.Streamer) error {
|
||||
for {
|
||||
req := &example.Ping{}
|
||||
if err := stream.Recv(req); err != nil {
|
||||
return err
|
||||
}
|
||||
log.Printf("Got ping %v", req.Stroke)
|
||||
if err := stream.Send(&example.Pong{Stroke: req.Stroke}); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -1,51 +0,0 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"log"
|
||||
|
||||
"github.com/micro/go-micro/cmd"
|
||||
"github.com/micro/go-micro/examples/server/handler"
|
||||
"github.com/micro/go-micro/examples/server/subscriber"
|
||||
"github.com/micro/go-micro/server"
|
||||
)
|
||||
|
||||
func main() {
|
||||
// optionally setup command line usage
|
||||
cmd.Init()
|
||||
|
||||
// Initialise Server
|
||||
server.Init(
|
||||
server.Name("go.micro.srv.example"),
|
||||
)
|
||||
|
||||
// Register Handlers
|
||||
server.Handle(
|
||||
server.NewHandler(
|
||||
new(handler.Example),
|
||||
),
|
||||
)
|
||||
|
||||
// Register Subscribers
|
||||
if err := server.Subscribe(
|
||||
server.NewSubscriber(
|
||||
"topic.go.micro.srv.example",
|
||||
new(subscriber.Example),
|
||||
),
|
||||
); err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
|
||||
if err := server.Subscribe(
|
||||
server.NewSubscriber(
|
||||
"topic.go.micro.srv.example",
|
||||
subscriber.Handler,
|
||||
),
|
||||
); err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
|
||||
// Run server
|
||||
if err := server.Run(); err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
}
|
||||
@ -1,355 +0,0 @@
|
||||
// Code generated by protoc-gen-go.
|
||||
// source: go-micro/examples/server/proto/example/example.proto
|
||||
// DO NOT EDIT!
|
||||
|
||||
/*
|
||||
Package go_micro_srv_example is a generated protocol buffer package.
|
||||
|
||||
It is generated from these files:
|
||||
go-micro/examples/server/proto/example/example.proto
|
||||
|
||||
It has these top-level messages:
|
||||
Message
|
||||
Request
|
||||
Response
|
||||
StreamingRequest
|
||||
StreamingResponse
|
||||
Ping
|
||||
Pong
|
||||
*/
|
||||
package go_micro_srv_example
|
||||
|
||||
import proto "github.com/golang/protobuf/proto"
|
||||
import fmt "fmt"
|
||||
import math "math"
|
||||
|
||||
import (
|
||||
client "github.com/micro/go-micro/client"
|
||||
server "github.com/micro/go-micro/server"
|
||||
context "golang.org/x/net/context"
|
||||
)
|
||||
|
||||
// Reference imports to suppress errors if they are not otherwise used.
|
||||
var _ = proto.Marshal
|
||||
var _ = fmt.Errorf
|
||||
var _ = math.Inf
|
||||
|
||||
type Message struct {
|
||||
Say string `protobuf:"bytes,1,opt,name=say" json:"say,omitempty"`
|
||||
}
|
||||
|
||||
func (m *Message) Reset() { *m = Message{} }
|
||||
func (m *Message) String() string { return proto.CompactTextString(m) }
|
||||
func (*Message) ProtoMessage() {}
|
||||
func (*Message) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
|
||||
|
||||
type Request struct {
|
||||
Name string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
|
||||
}
|
||||
|
||||
func (m *Request) Reset() { *m = Request{} }
|
||||
func (m *Request) String() string { return proto.CompactTextString(m) }
|
||||
func (*Request) ProtoMessage() {}
|
||||
func (*Request) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
|
||||
|
||||
type Response struct {
|
||||
Msg string `protobuf:"bytes,1,opt,name=msg" json:"msg,omitempty"`
|
||||
}
|
||||
|
||||
func (m *Response) Reset() { *m = Response{} }
|
||||
func (m *Response) String() string { return proto.CompactTextString(m) }
|
||||
func (*Response) ProtoMessage() {}
|
||||
func (*Response) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
|
||||
|
||||
type StreamingRequest struct {
|
||||
Count int64 `protobuf:"varint,1,opt,name=count" json:"count,omitempty"`
|
||||
}
|
||||
|
||||
func (m *StreamingRequest) Reset() { *m = StreamingRequest{} }
|
||||
func (m *StreamingRequest) String() string { return proto.CompactTextString(m) }
|
||||
func (*StreamingRequest) ProtoMessage() {}
|
||||
func (*StreamingRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{3} }
|
||||
|
||||
type StreamingResponse struct {
|
||||
Count int64 `protobuf:"varint,1,opt,name=count" json:"count,omitempty"`
|
||||
}
|
||||
|
||||
func (m *StreamingResponse) Reset() { *m = StreamingResponse{} }
|
||||
func (m *StreamingResponse) String() string { return proto.CompactTextString(m) }
|
||||
func (*StreamingResponse) ProtoMessage() {}
|
||||
func (*StreamingResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{4} }
|
||||
|
||||
type Ping struct {
|
||||
Stroke int64 `protobuf:"varint,1,opt,name=stroke" json:"stroke,omitempty"`
|
||||
}
|
||||
|
||||
func (m *Ping) Reset() { *m = Ping{} }
|
||||
func (m *Ping) String() string { return proto.CompactTextString(m) }
|
||||
func (*Ping) ProtoMessage() {}
|
||||
func (*Ping) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{5} }
|
||||
|
||||
type Pong struct {
|
||||
Stroke int64 `protobuf:"varint,1,opt,name=stroke" json:"stroke,omitempty"`
|
||||
}
|
||||
|
||||
func (m *Pong) Reset() { *m = Pong{} }
|
||||
func (m *Pong) String() string { return proto.CompactTextString(m) }
|
||||
func (*Pong) ProtoMessage() {}
|
||||
func (*Pong) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{6} }
|
||||
|
||||
func init() {
|
||||
proto.RegisterType((*Message)(nil), "go.micro.srv.example.Message")
|
||||
proto.RegisterType((*Request)(nil), "go.micro.srv.example.Request")
|
||||
proto.RegisterType((*Response)(nil), "go.micro.srv.example.Response")
|
||||
proto.RegisterType((*StreamingRequest)(nil), "go.micro.srv.example.StreamingRequest")
|
||||
proto.RegisterType((*StreamingResponse)(nil), "go.micro.srv.example.StreamingResponse")
|
||||
proto.RegisterType((*Ping)(nil), "go.micro.srv.example.Ping")
|
||||
proto.RegisterType((*Pong)(nil), "go.micro.srv.example.Pong")
|
||||
}
|
||||
|
||||
// Reference imports to suppress errors if they are not otherwise used.
|
||||
var _ context.Context
|
||||
var _ client.Option
|
||||
var _ server.Option
|
||||
|
||||
// Client API for Example service
|
||||
|
||||
type ExampleClient interface {
|
||||
Call(ctx context.Context, in *Request, opts ...client.CallOption) (*Response, error)
|
||||
Stream(ctx context.Context, in *StreamingRequest, opts ...client.CallOption) (Example_StreamClient, error)
|
||||
PingPong(ctx context.Context, opts ...client.CallOption) (Example_PingPongClient, error)
|
||||
}
|
||||
|
||||
type exampleClient struct {
|
||||
c client.Client
|
||||
serviceName string
|
||||
}
|
||||
|
||||
func NewExampleClient(serviceName string, c client.Client) ExampleClient {
|
||||
if c == nil {
|
||||
c = client.NewClient()
|
||||
}
|
||||
if len(serviceName) == 0 {
|
||||
serviceName = "go.micro.srv.example"
|
||||
}
|
||||
return &exampleClient{
|
||||
c: c,
|
||||
serviceName: serviceName,
|
||||
}
|
||||
}
|
||||
|
||||
func (c *exampleClient) Call(ctx context.Context, in *Request, opts ...client.CallOption) (*Response, error) {
|
||||
req := c.c.NewRequest(c.serviceName, "Example.Call", in)
|
||||
out := new(Response)
|
||||
err := c.c.Call(ctx, req, out, opts...)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return out, nil
|
||||
}
|
||||
|
||||
func (c *exampleClient) Stream(ctx context.Context, in *StreamingRequest, opts ...client.CallOption) (Example_StreamClient, error) {
|
||||
req := c.c.NewRequest(c.serviceName, "Example.Stream", &StreamingRequest{})
|
||||
stream, err := c.c.Stream(ctx, req, opts...)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if err := stream.Send(in); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return &exampleStreamClient{stream}, nil
|
||||
}
|
||||
|
||||
type Example_StreamClient interface {
|
||||
SendMsg(interface{}) error
|
||||
RecvMsg(interface{}) error
|
||||
Close() error
|
||||
Recv() (*StreamingResponse, error)
|
||||
}
|
||||
|
||||
type exampleStreamClient struct {
|
||||
stream client.Streamer
|
||||
}
|
||||
|
||||
func (x *exampleStreamClient) Close() error {
|
||||
return x.stream.Close()
|
||||
}
|
||||
|
||||
func (x *exampleStreamClient) SendMsg(m interface{}) error {
|
||||
return x.stream.Send(m)
|
||||
}
|
||||
|
||||
func (x *exampleStreamClient) RecvMsg(m interface{}) error {
|
||||
return x.stream.Recv(m)
|
||||
}
|
||||
|
||||
func (x *exampleStreamClient) Recv() (*StreamingResponse, error) {
|
||||
m := new(StreamingResponse)
|
||||
err := x.stream.Recv(m)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return m, nil
|
||||
}
|
||||
|
||||
func (c *exampleClient) PingPong(ctx context.Context, opts ...client.CallOption) (Example_PingPongClient, error) {
|
||||
req := c.c.NewRequest(c.serviceName, "Example.PingPong", &Ping{})
|
||||
stream, err := c.c.Stream(ctx, req, opts...)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return &examplePingPongClient{stream}, nil
|
||||
}
|
||||
|
||||
type Example_PingPongClient interface {
|
||||
SendMsg(interface{}) error
|
||||
RecvMsg(interface{}) error
|
||||
Close() error
|
||||
Send(*Ping) error
|
||||
Recv() (*Pong, error)
|
||||
}
|
||||
|
||||
type examplePingPongClient struct {
|
||||
stream client.Streamer
|
||||
}
|
||||
|
||||
func (x *examplePingPongClient) Close() error {
|
||||
return x.stream.Close()
|
||||
}
|
||||
|
||||
func (x *examplePingPongClient) SendMsg(m interface{}) error {
|
||||
return x.stream.Send(m)
|
||||
}
|
||||
|
||||
func (x *examplePingPongClient) RecvMsg(m interface{}) error {
|
||||
return x.stream.Recv(m)
|
||||
}
|
||||
|
||||
func (x *examplePingPongClient) Send(m *Ping) error {
|
||||
return x.stream.Send(m)
|
||||
}
|
||||
|
||||
func (x *examplePingPongClient) Recv() (*Pong, error) {
|
||||
m := new(Pong)
|
||||
err := x.stream.Recv(m)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return m, nil
|
||||
}
|
||||
|
||||
// Server API for Example service
|
||||
|
||||
type ExampleHandler interface {
|
||||
Call(context.Context, *Request, *Response) error
|
||||
Stream(context.Context, *StreamingRequest, Example_StreamStream) error
|
||||
PingPong(context.Context, Example_PingPongStream) error
|
||||
}
|
||||
|
||||
func RegisterExampleHandler(s server.Server, hdlr ExampleHandler) {
|
||||
s.Handle(s.NewHandler(&Example{hdlr}))
|
||||
}
|
||||
|
||||
type Example struct {
|
||||
ExampleHandler
|
||||
}
|
||||
|
||||
func (h *Example) Call(ctx context.Context, in *Request, out *Response) error {
|
||||
return h.ExampleHandler.Call(ctx, in, out)
|
||||
}
|
||||
|
||||
func (h *Example) Stream(ctx context.Context, stream server.Streamer) error {
|
||||
m := new(StreamingRequest)
|
||||
if err := stream.Recv(m); err != nil {
|
||||
return err
|
||||
}
|
||||
return h.ExampleHandler.Stream(ctx, m, &exampleStreamStream{stream})
|
||||
}
|
||||
|
||||
type Example_StreamStream interface {
|
||||
SendMsg(interface{}) error
|
||||
RecvMsg(interface{}) error
|
||||
Close() error
|
||||
Send(*StreamingResponse) error
|
||||
}
|
||||
|
||||
type exampleStreamStream struct {
|
||||
stream server.Streamer
|
||||
}
|
||||
|
||||
func (x *exampleStreamStream) Close() error {
|
||||
return x.stream.Close()
|
||||
}
|
||||
|
||||
func (x *exampleStreamStream) SendMsg(m interface{}) error {
|
||||
return x.stream.Send(m)
|
||||
}
|
||||
|
||||
func (x *exampleStreamStream) RecvMsg(m interface{}) error {
|
||||
return x.stream.Recv(m)
|
||||
}
|
||||
|
||||
func (x *exampleStreamStream) Send(m *StreamingResponse) error {
|
||||
return x.stream.Send(m)
|
||||
}
|
||||
|
||||
func (h *Example) PingPong(ctx context.Context, stream server.Streamer) error {
|
||||
return h.ExampleHandler.PingPong(ctx, &examplePingPongStream{stream})
|
||||
}
|
||||
|
||||
type Example_PingPongStream interface {
|
||||
SendMsg(interface{}) error
|
||||
RecvMsg(interface{}) error
|
||||
Close() error
|
||||
Send(*Pong) error
|
||||
Recv() (*Ping, error)
|
||||
}
|
||||
|
||||
type examplePingPongStream struct {
|
||||
stream server.Streamer
|
||||
}
|
||||
|
||||
func (x *examplePingPongStream) Close() error {
|
||||
return x.stream.Close()
|
||||
}
|
||||
|
||||
func (x *examplePingPongStream) SendMsg(m interface{}) error {
|
||||
return x.stream.Send(m)
|
||||
}
|
||||
|
||||
func (x *examplePingPongStream) RecvMsg(m interface{}) error {
|
||||
return x.stream.Recv(m)
|
||||
}
|
||||
|
||||
func (x *examplePingPongStream) Send(m *Pong) error {
|
||||
return x.stream.Send(m)
|
||||
}
|
||||
|
||||
func (x *examplePingPongStream) Recv() (*Ping, error) {
|
||||
m := new(Ping)
|
||||
if err := x.stream.Recv(m); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return m, nil
|
||||
}
|
||||
|
||||
var fileDescriptor0 = []byte{
|
||||
// 270 bytes of a gzipped FileDescriptorProto
|
||||
0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x84, 0x91, 0x5f, 0x4b, 0xc3, 0x30,
|
||||
0x14, 0xc5, 0x17, 0x56, 0xdb, 0x79, 0xfd, 0x83, 0x06, 0x99, 0x52, 0x50, 0x34, 0x0f, 0xba, 0x17,
|
||||
0xd3, 0xa1, 0x7e, 0x03, 0x11, 0x7d, 0x11, 0x64, 0x3e, 0xfb, 0x10, 0xc7, 0x25, 0x0c, 0x9b, 0xa6,
|
||||
0xe6, 0x66, 0x43, 0x3f, 0xbb, 0x2f, 0x6e, 0x69, 0x3b, 0xc6, 0xec, 0xf0, 0x29, 0x70, 0x7e, 0xe7,
|
||||
0x5c, 0xce, 0x21, 0x70, 0xa7, 0xed, 0xb5, 0x99, 0x8c, 0x9d, 0xcd, 0xf0, 0x4b, 0x99, 0x32, 0x47,
|
||||
0xca, 0x08, 0xdd, 0x0c, 0x5d, 0x56, 0x3a, 0xeb, 0x97, 0x6a, 0xf3, 0xca, 0xa0, 0xf2, 0x23, 0x6d,
|
||||
0x65, 0x48, 0x49, 0x72, 0x33, 0x59, 0x33, 0xd1, 0x87, 0xe4, 0x19, 0x89, 0x94, 0x46, 0xbe, 0x03,
|
||||
0x5d, 0x52, 0xdf, 0x27, 0xec, 0x9c, 0x0d, 0xb6, 0xc5, 0x31, 0x24, 0x23, 0xfc, 0x9c, 0x22, 0x79,
|
||||
0xbe, 0x0b, 0x51, 0xa1, 0x0c, 0x2e, 0x41, 0x6f, 0x84, 0x54, 0xda, 0x82, 0x42, 0xc2, 0x90, 0xae,
|
||||
0xc1, 0x05, 0x1c, 0xbc, 0x7a, 0x87, 0xca, 0x4c, 0x0a, 0xdd, 0x44, 0xf7, 0x60, 0x6b, 0x6c, 0xa7,
|
||||
0x85, 0x0f, 0x96, 0xae, 0x10, 0x70, 0xb8, 0x62, 0xa9, 0x8f, 0xac, 0x79, 0xfa, 0x10, 0xbd, 0xcc,
|
||||
0x31, 0xdf, 0x87, 0x98, 0xbc, 0xb3, 0x1f, 0xb8, 0xa2, 0xdb, 0xbf, 0xfa, 0xcd, 0x0f, 0x83, 0xe4,
|
||||
0xa1, 0x1a, 0xc3, 0x1f, 0x21, 0xba, 0x57, 0x79, 0xce, 0x4f, 0x65, 0xdb, 0x56, 0x59, 0xb7, 0x4a,
|
||||
0xcf, 0x36, 0xe1, 0xaa, 0x91, 0xe8, 0xf0, 0x37, 0x88, 0xab, 0xa2, 0xfc, 0xb2, 0xdd, 0xbb, 0xbe,
|
||||
0x34, 0xbd, 0xfa, 0xd7, 0xd7, 0x1c, 0x1f, 0x32, 0xfe, 0x04, 0xbd, 0xc5, 0xc6, 0xb0, 0x27, 0x6d,
|
||||
0x0f, 0x2e, 0x78, 0xba, 0x89, 0xcd, 0x73, 0xa2, 0x33, 0x60, 0x43, 0xf6, 0x1e, 0x87, 0xbf, 0xbd,
|
||||
0xfd, 0x0d, 0x00, 0x00, 0xff, 0xff, 0x53, 0xb5, 0xeb, 0x31, 0x13, 0x02, 0x00, 0x00,
|
||||
}
|
||||
@ -1,37 +0,0 @@
|
||||
syntax = "proto3";
|
||||
|
||||
package go.micro.srv.example;
|
||||
|
||||
service Example {
|
||||
rpc Call(Request) returns (Response) {}
|
||||
rpc Stream(StreamingRequest) returns (stream StreamingResponse) {}
|
||||
rpc PingPong(stream Ping) returns (stream Pong) {}
|
||||
}
|
||||
|
||||
message Message {
|
||||
string say = 1;
|
||||
}
|
||||
|
||||
message Request {
|
||||
string name = 1;
|
||||
}
|
||||
|
||||
message Response {
|
||||
string msg = 1;
|
||||
}
|
||||
|
||||
message StreamingRequest {
|
||||
int64 count = 1;
|
||||
}
|
||||
|
||||
message StreamingResponse {
|
||||
int64 count = 1;
|
||||
}
|
||||
|
||||
message Ping {
|
||||
int64 stroke = 1;
|
||||
}
|
||||
|
||||
message Pong {
|
||||
int64 stroke = 1;
|
||||
}
|
||||
@ -1,20 +0,0 @@
|
||||
package subscriber
|
||||
|
||||
import (
|
||||
"log"
|
||||
|
||||
example "github.com/micro/go-micro/examples/server/proto/example"
|
||||
"golang.org/x/net/context"
|
||||
)
|
||||
|
||||
type Example struct{}
|
||||
|
||||
func (e *Example) Handle(ctx context.Context, msg *example.Message) error {
|
||||
log.Print("Handler Received message: ", msg.Say)
|
||||
return nil
|
||||
}
|
||||
|
||||
func Handler(ctx context.Context, msg *example.Message) error {
|
||||
log.Print("Function Received message: ", msg.Say)
|
||||
return nil
|
||||
}
|
||||
@ -1,79 +0,0 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"log"
|
||||
|
||||
"github.com/micro/go-micro/cmd"
|
||||
"github.com/micro/go-micro/examples/server/handler"
|
||||
"github.com/micro/go-micro/examples/server/subscriber"
|
||||
"github.com/micro/go-micro/server"
|
||||
"golang.org/x/net/context"
|
||||
)
|
||||
|
||||
func logWrapper(fn server.HandlerFunc) server.HandlerFunc {
|
||||
return func(ctx context.Context, req server.Request, rsp interface{}) error {
|
||||
log.Printf("[Log Wrapper] Before serving request method: %v", req.Method())
|
||||
err := fn(ctx, req, rsp)
|
||||
log.Printf("[Log Wrapper] After serving request")
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
func logSubWrapper(fn server.SubscriberFunc) server.SubscriberFunc {
|
||||
return func(ctx context.Context, req server.Publication) error {
|
||||
log.Printf("[Log Sub Wrapper] Before serving publication topic: %v", req.Topic())
|
||||
err := fn(ctx, req)
|
||||
log.Printf("[Log Sub Wrapper] After serving publication")
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
func main() {
|
||||
// optionally setup command line usage
|
||||
cmd.Init()
|
||||
|
||||
md := server.DefaultOptions().Metadata
|
||||
md["datacenter"] = "local"
|
||||
|
||||
server.DefaultServer = server.NewServer(
|
||||
server.WrapHandler(logWrapper),
|
||||
server.WrapSubscriber(logSubWrapper),
|
||||
server.Metadata(md),
|
||||
)
|
||||
|
||||
// Initialise Server
|
||||
server.Init(
|
||||
server.Name("go.micro.srv.example"),
|
||||
)
|
||||
|
||||
// Register Handlers
|
||||
server.Handle(
|
||||
server.NewHandler(
|
||||
new(handler.Example),
|
||||
),
|
||||
)
|
||||
|
||||
// Register Subscribers
|
||||
if err := server.Subscribe(
|
||||
server.NewSubscriber(
|
||||
"topic.go.micro.srv.example",
|
||||
new(subscriber.Example),
|
||||
),
|
||||
); err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
|
||||
if err := server.Subscribe(
|
||||
server.NewSubscriber(
|
||||
"topic.go.micro.srv.example",
|
||||
subscriber.Handler,
|
||||
),
|
||||
); err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
|
||||
// Run server
|
||||
if err := server.Run(); err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
}
|
||||
@ -1,37 +0,0 @@
|
||||
# Service
|
||||
|
||||
This is an example of creating a micro service.
|
||||
|
||||
## Prereqs
|
||||
|
||||
Micro services need a discovery system so they can find each other. Micro uses consul by default but
|
||||
its easily swapped out with etcd, kubernetes, or various other systems. We'll run consul for convenience.
|
||||
|
||||
Install consul
|
||||
```shell
|
||||
brew install consul
|
||||
```
|
||||
|
||||
Alternative instructions - [https://www.consul.io/intro/getting-started/install.html](https://www.consul.io/intro/getting-started/install.html)
|
||||
|
||||
Run Consul
|
||||
|
||||
```shell
|
||||
consul agent -dev -advertise=127.0.0.1
|
||||
```
|
||||
|
||||
## Run the example
|
||||
|
||||
Run the service
|
||||
|
||||
```shell
|
||||
go run main.go
|
||||
```
|
||||
|
||||
Run the client
|
||||
|
||||
```shell
|
||||
go run main.go --run_client
|
||||
```
|
||||
|
||||
And that's all there is to it.
|
||||
@ -1,86 +0,0 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"os"
|
||||
|
||||
"github.com/micro/cli"
|
||||
"github.com/micro/go-micro"
|
||||
proto "github.com/micro/go-micro/examples/service/proto"
|
||||
"golang.org/x/net/context"
|
||||
)
|
||||
|
||||
/*
|
||||
|
||||
Example usage of top level service initialisation
|
||||
|
||||
*/
|
||||
|
||||
type Greeter struct{}
|
||||
|
||||
func (g *Greeter) Hello(ctx context.Context, req *proto.HelloRequest, rsp *proto.HelloResponse) error {
|
||||
rsp.Greeting = "Hello " + req.Name
|
||||
return nil
|
||||
}
|
||||
|
||||
// Setup and the client
|
||||
func runClient(service micro.Service) {
|
||||
// Create new greeter client
|
||||
greeter := proto.NewGreeterClient("greeter", service.Client())
|
||||
|
||||
// Call the greeter
|
||||
rsp, err := greeter.Hello(context.TODO(), &proto.HelloRequest{Name: "John"})
|
||||
if err != nil {
|
||||
fmt.Println(err)
|
||||
return
|
||||
}
|
||||
|
||||
// Print response
|
||||
fmt.Println(rsp.Greeting)
|
||||
}
|
||||
|
||||
func main() {
|
||||
// Create a new service. Optionally include some options here.
|
||||
service := micro.NewService(
|
||||
micro.Name("greeter"),
|
||||
micro.Version("latest"),
|
||||
micro.Metadata(map[string]string{
|
||||
"type": "helloworld",
|
||||
}),
|
||||
|
||||
// Setup some flags. Specify --run_client to run the client
|
||||
|
||||
// Add runtime flags
|
||||
// We could do this below too
|
||||
micro.Flags(cli.BoolFlag{
|
||||
Name: "run_client",
|
||||
Usage: "Launch the client",
|
||||
}),
|
||||
)
|
||||
|
||||
// Init will parse the command line flags. Any flags set will
|
||||
// override the above settings. Options defined here will
|
||||
// override anything set on the command line.
|
||||
service.Init(
|
||||
// Add runtime action
|
||||
// We could actually do this above
|
||||
micro.Action(func(c *cli.Context) {
|
||||
if c.Bool("run_client") {
|
||||
runClient(service)
|
||||
os.Exit(0)
|
||||
}
|
||||
}),
|
||||
)
|
||||
|
||||
// By default we'll run the server unless the flags catch us
|
||||
|
||||
// Setup the server
|
||||
|
||||
// Register handler
|
||||
proto.RegisterGreeterHandler(service.Server(), new(Greeter))
|
||||
|
||||
// Run the server
|
||||
if err := service.Run(); err != nil {
|
||||
fmt.Println(err)
|
||||
}
|
||||
}
|
||||
@ -1,124 +0,0 @@
|
||||
// Code generated by protoc-gen-go.
|
||||
// source: go-micro/examples/service/proto/greeter.proto
|
||||
// DO NOT EDIT!
|
||||
|
||||
/*
|
||||
Package greeter is a generated protocol buffer package.
|
||||
|
||||
It is generated from these files:
|
||||
go-micro/examples/service/proto/greeter.proto
|
||||
|
||||
It has these top-level messages:
|
||||
HelloRequest
|
||||
HelloResponse
|
||||
*/
|
||||
package greeter
|
||||
|
||||
import proto "github.com/golang/protobuf/proto"
|
||||
import fmt "fmt"
|
||||
import math "math"
|
||||
|
||||
import (
|
||||
client "github.com/micro/go-micro/client"
|
||||
server "github.com/micro/go-micro/server"
|
||||
context "golang.org/x/net/context"
|
||||
)
|
||||
|
||||
// Reference imports to suppress errors if they are not otherwise used.
|
||||
var _ = proto.Marshal
|
||||
var _ = fmt.Errorf
|
||||
var _ = math.Inf
|
||||
|
||||
type HelloRequest struct {
|
||||
Name string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
|
||||
}
|
||||
|
||||
func (m *HelloRequest) Reset() { *m = HelloRequest{} }
|
||||
func (m *HelloRequest) String() string { return proto.CompactTextString(m) }
|
||||
func (*HelloRequest) ProtoMessage() {}
|
||||
func (*HelloRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
|
||||
|
||||
type HelloResponse struct {
|
||||
Greeting string `protobuf:"bytes,2,opt,name=greeting" json:"greeting,omitempty"`
|
||||
}
|
||||
|
||||
func (m *HelloResponse) Reset() { *m = HelloResponse{} }
|
||||
func (m *HelloResponse) String() string { return proto.CompactTextString(m) }
|
||||
func (*HelloResponse) ProtoMessage() {}
|
||||
func (*HelloResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
|
||||
|
||||
func init() {
|
||||
proto.RegisterType((*HelloRequest)(nil), "HelloRequest")
|
||||
proto.RegisterType((*HelloResponse)(nil), "HelloResponse")
|
||||
}
|
||||
|
||||
// Reference imports to suppress errors if they are not otherwise used.
|
||||
var _ context.Context
|
||||
var _ client.Option
|
||||
var _ server.Option
|
||||
|
||||
// Client API for Greeter service
|
||||
|
||||
type GreeterClient interface {
|
||||
Hello(ctx context.Context, in *HelloRequest, opts ...client.CallOption) (*HelloResponse, error)
|
||||
}
|
||||
|
||||
type greeterClient struct {
|
||||
c client.Client
|
||||
serviceName string
|
||||
}
|
||||
|
||||
func NewGreeterClient(serviceName string, c client.Client) GreeterClient {
|
||||
if c == nil {
|
||||
c = client.NewClient()
|
||||
}
|
||||
if len(serviceName) == 0 {
|
||||
serviceName = "greeter"
|
||||
}
|
||||
return &greeterClient{
|
||||
c: c,
|
||||
serviceName: serviceName,
|
||||
}
|
||||
}
|
||||
|
||||
func (c *greeterClient) Hello(ctx context.Context, in *HelloRequest, opts ...client.CallOption) (*HelloResponse, error) {
|
||||
req := c.c.NewRequest(c.serviceName, "Greeter.Hello", in)
|
||||
out := new(HelloResponse)
|
||||
err := c.c.Call(ctx, req, out, opts...)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return out, nil
|
||||
}
|
||||
|
||||
// Server API for Greeter service
|
||||
|
||||
type GreeterHandler interface {
|
||||
Hello(context.Context, *HelloRequest, *HelloResponse) error
|
||||
}
|
||||
|
||||
func RegisterGreeterHandler(s server.Server, hdlr GreeterHandler) {
|
||||
s.Handle(s.NewHandler(&Greeter{hdlr}))
|
||||
}
|
||||
|
||||
type Greeter struct {
|
||||
GreeterHandler
|
||||
}
|
||||
|
||||
func (h *Greeter) Hello(ctx context.Context, in *HelloRequest, out *HelloResponse) error {
|
||||
return h.GreeterHandler.Hello(ctx, in, out)
|
||||
}
|
||||
|
||||
var fileDescriptor0 = []byte{
|
||||
// 153 bytes of a gzipped FileDescriptorProto
|
||||
0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xe2, 0xd2, 0x4d, 0xcf, 0xd7, 0xcd,
|
||||
0xcd, 0x4c, 0x2e, 0xca, 0xd7, 0x4f, 0xad, 0x48, 0xcc, 0x2d, 0xc8, 0x49, 0x2d, 0xd6, 0x2f, 0x4e,
|
||||
0x2d, 0x2a, 0xcb, 0x4c, 0x4e, 0xd5, 0x2f, 0x28, 0xca, 0x2f, 0xc9, 0xd7, 0x4f, 0x2f, 0x4a, 0x4d,
|
||||
0x2d, 0x49, 0x2d, 0xd2, 0x03, 0xf3, 0x94, 0x64, 0xb8, 0x78, 0x3c, 0x52, 0x73, 0x72, 0xf2, 0x83,
|
||||
0x52, 0x0b, 0x4b, 0x53, 0x8b, 0x4b, 0x84, 0x78, 0xb8, 0x58, 0xf2, 0x12, 0x73, 0x53, 0x25, 0x18,
|
||||
0x15, 0x18, 0x35, 0x38, 0x95, 0x14, 0xb9, 0x78, 0xa1, 0xb2, 0xc5, 0x05, 0xf9, 0x79, 0xc5, 0xa9,
|
||||
0x42, 0x02, 0x5c, 0x1c, 0x60, 0xfd, 0x99, 0x79, 0xe9, 0x12, 0x4c, 0x20, 0x25, 0x46, 0xc6, 0x5c,
|
||||
0xec, 0xee, 0x10, 0x13, 0x85, 0x34, 0xb8, 0x58, 0xc1, 0xaa, 0x85, 0x78, 0xf5, 0x90, 0xcd, 0x94,
|
||||
0xe2, 0xd3, 0x43, 0x31, 0x44, 0x89, 0x21, 0x89, 0x0d, 0x6c, 0xb9, 0x31, 0x20, 0x00, 0x00, 0xff,
|
||||
0xff, 0x0f, 0xa9, 0x59, 0xb3, 0xad, 0x00, 0x00, 0x00,
|
||||
}
|
||||
@ -1,13 +0,0 @@
|
||||
syntax = "proto3";
|
||||
|
||||
service Greeter {
|
||||
rpc Hello(HelloRequest) returns (HelloResponse) {}
|
||||
}
|
||||
|
||||
message HelloRequest {
|
||||
string name = 1;
|
||||
}
|
||||
|
||||
message HelloResponse {
|
||||
string greeting = 2;
|
||||
}
|
||||
@ -1,3 +0,0 @@
|
||||
# Client/Server Wrapper
|
||||
|
||||
This is an example using wrappers or middleware
|
||||
@ -1,116 +0,0 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"os"
|
||||
|
||||
"github.com/micro/cli"
|
||||
"github.com/micro/go-micro"
|
||||
"github.com/micro/go-micro/client"
|
||||
proto "github.com/micro/go-micro/examples/service/proto"
|
||||
"github.com/micro/go-micro/metadata"
|
||||
"github.com/micro/go-micro/server"
|
||||
"golang.org/x/net/context"
|
||||
)
|
||||
|
||||
/*
|
||||
|
||||
Example usage of top level service initialisation including wrappers
|
||||
|
||||
*/
|
||||
|
||||
type logWrapper struct {
|
||||
client.Client
|
||||
}
|
||||
|
||||
func (l *logWrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
|
||||
md, _ := metadata.FromContext(ctx)
|
||||
fmt.Printf("[Log Wrapper] ctx: %v service: %s method: %s\n", md, req.Service(), req.Method())
|
||||
return l.Client.Call(ctx, req, rsp)
|
||||
}
|
||||
|
||||
// Implements client.Wrapper as logWrapper
|
||||
func logWrap(c client.Client) client.Client {
|
||||
return &logWrapper{c}
|
||||
}
|
||||
|
||||
// Implements the server.HandlerWrapper
|
||||
func logHandlerWrapper(fn server.HandlerFunc) server.HandlerFunc {
|
||||
return func(ctx context.Context, req server.Request, rsp interface{}) error {
|
||||
fmt.Printf("[Log Wrapper] Before serving request method: %v\n", req.Method())
|
||||
err := fn(ctx, req, rsp)
|
||||
fmt.Println("[Log Wrapper] After serving request")
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
type Greeter struct{}
|
||||
|
||||
func (g *Greeter) Hello(ctx context.Context, req *proto.HelloRequest, rsp *proto.HelloResponse) error {
|
||||
rsp.Greeting = "Hello " + req.Name
|
||||
return nil
|
||||
}
|
||||
|
||||
// Setup and the client
|
||||
func runClient(service micro.Service) {
|
||||
// Create new greeter client
|
||||
greeter := proto.NewGreeterClient("greeter", service.Client())
|
||||
|
||||
// Call the greeter
|
||||
rsp, err := greeter.Hello(context.TODO(), &proto.HelloRequest{Name: "John"})
|
||||
if err != nil {
|
||||
fmt.Println(err)
|
||||
return
|
||||
}
|
||||
|
||||
// Print response
|
||||
fmt.Println(rsp.Greeting)
|
||||
}
|
||||
|
||||
func main() {
|
||||
// Create a new service. Optionally include some options here.
|
||||
service := micro.NewService(
|
||||
micro.Client(client.NewClient(client.Wrap(logWrap))),
|
||||
micro.Server(server.NewServer(server.WrapHandler(logHandlerWrapper))),
|
||||
micro.Name("greeter"),
|
||||
micro.Version("latest"),
|
||||
micro.Metadata(map[string]string{
|
||||
"type": "helloworld",
|
||||
}),
|
||||
|
||||
// Setup some flags. Specify --run_client to run the client
|
||||
|
||||
// Add runtime flags
|
||||
// We could do this below too
|
||||
micro.Flags(cli.BoolFlag{
|
||||
Name: "run_client",
|
||||
Usage: "Launch the client",
|
||||
}),
|
||||
)
|
||||
|
||||
// Init will parse the command line flags. Any flags set will
|
||||
// override the above settings. Options defined here will
|
||||
// override anything set on the command line.
|
||||
service.Init(
|
||||
// Add runtime action
|
||||
// We could actually do this above
|
||||
micro.Action(func(c *cli.Context) {
|
||||
if c.Bool("run_client") {
|
||||
runClient(service)
|
||||
os.Exit(0)
|
||||
}
|
||||
}),
|
||||
)
|
||||
|
||||
// By default we'll run the server unless the flags catch us
|
||||
|
||||
// Setup the server
|
||||
|
||||
// Register handler
|
||||
proto.RegisterGreeterHandler(service.Server(), new(Greeter))
|
||||
|
||||
// Run the server
|
||||
if err := service.Run(); err != nil {
|
||||
fmt.Println(err)
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user