golang/registry/etcd/go-client/app/client.go

package main

import (
	"context"
	"fmt"
	"os"
	"os/signal"
	"syscall"
	"time"
)

import (
	"github.com/dubbogo/gost/log"
)

import (
	hessian "github.com/apache/dubbo-go-hessian2"
	"github.com/apache/dubbo-go/common/logger"
	_ "github.com/apache/dubbo-go/common/proxy/proxy_factory"
	"github.com/apache/dubbo-go/config"
	_ "github.com/apache/dubbo-go/protocol/dubbo"
	_ "github.com/apache/dubbo-go/registry/protocol"

	_ "github.com/apache/dubbo-go/filter/filter_impl"

	_ "github.com/apache/dubbo-go/cluster/cluster_impl"
	_ "github.com/apache/dubbo-go/cluster/loadbalance"

	// import etcdv3 to init etcdv3 registry
	_ "github.com/apache/dubbo-go/registry/etcdv3"
)

var (
	survivalTimeout int = 10e9
)

// they are necessary:
// 		export CONF_CONSUMER_FILE_PATH="xxx"
// 		export APP_LOG_CONF_FILE="xxx"
func main() {
	hessian.RegisterPOJO(&User{})
	config.Load()
	time.Sleep(3e9)

	gxlog.CInfo("\n\n\nstart to test dubbo")
	user := &User{}
	err := userProvider.GetUser(context.TODO(), []interface{}{"A001"}, user)
	if err != nil {
		panic(err)
	}
	gxlog.CInfo("response result: %v\n", user)
	initSignal()
}

func initSignal() {
	signals := make(chan os.Signal, 1)
	// It is not possible to block SIGKILL or syscall.SIGSTOP
	signal.Notify(signals, os.Interrupt, os.Kill, syscall.SIGHUP,
		syscall.SIGQUIT, syscall.SIGTERM, syscall.SIGINT)
	for {
		sig := <-signals
		logger.Infof("get signal %s", sig.String())
		switch sig {
		case syscall.SIGHUP:
			// reload()
		default:
			time.AfterFunc(time.Duration(survivalTimeout), func() {
				logger.Warnf("app exit now by force...")
				os.Exit(1)
			})

			// The program exits normally or timeout forcibly exits.
			fmt.Println("app exit now...")
			return
		}
	}
}