注册和启动服务的优雅性

优雅的启动服务和退出

package main

import (
    "fmt"
    "github.com/gorilla/mux"
    "goetcd/util"
    "log"
    "net/http"
    "os"
    "os/signal"
    "strconv"
    "syscall"
)

func main() {
    router := mux.NewRouter()

    router.HandleFunc("/product/{id:\\d+}", func(writer http.ResponseWriter, request *http.Request) {
        vars := mux.Vars(request)
        str := "get product ByID" + vars["id"]
        writer.Write([]byte(str))
    })
    serviceID := "p1"
    serviceName := "productservice"
    serviceAddr := "192.168.29.1"
    servicePort := 8081

    s := util.NewService()
    errChan := make(chan error)
    go func() {
        err := s.RegService(serviceID, serviceName, serviceAddr+strconv.Itoa(servicePort))
        if err != nil {
            errChan <- err
            return
        }
        err = http.ListenAndServe(":8081", router)
        if err != nil {
            errChan <- err
            return
        }
    }()

    go func() {
        sig := make(chan os.Signal)
        signal.Notify(sig, syscall.SIGINT, syscall.SIGTERM)
        errChan <- fmt.Errorf("%s", <-sig) //当接收到信号停止
    }()
    getErr := <-errChan
    fmt.Println("发生异常,服务正在停止")
    log.Fatal(getErr)
}

来自为知笔记(Wiz)