go iris Multi service implementation framework Demo： adopt （ monitor 8083 Port of ） service 1 Interface startup in （ monitor 8084 Port of ） service 2

Preface

One 、DEMO Example

1. Import and stock in

The code is as follows （ Example ）：

package main

import (
	"context"
	"fmt"
	"log"
	"time"

	"github.com/kataras/iris/v12"
	"golang.org/x/sync/errgroup"
)

var g errgroup.Group
var sig string
var app2 *iris.Application

func main() {
    
	sig = "start"
	g.Go(startApp1)

	if err := g.Wait(); err != nil {
    
		fmt.Println(fmt.Sprintf("startup service failed, err:%v\n", err))
	}

}
func startApp1() error {
    
	app := iris.New()

	app.Handle("GET", "/hello1", hello1)
	app.Handle("GET", "/restart", restart)
	log.Println("http://localhost:8083/hello1")
	log.Println("http://localhost:8084/hello2")
	log.Println("http://localhost:8083/restart")
	err := app.Listen(":8083")
	return err
}
func startApp2() error {
    
	var err error
	app2 = iris.New()
	app2.Handle("GET", "/hello2", hello2)
	err = app2.Listen(":8084")
	return err
}

func restart(c iris.Context) {
    
	if sig == "start" {
    
		g.Go(startApp2)
		fmt.Println(" Started http://localhost:8084")
		sig = "restart"
	} else if sig == "restart" {
    
		// lsnrctl stop 
		ctx, cancel := context.WithTimeout(context.Background(), 60*time.Second)
		defer cancel()
		if err := app2.Shutdown(ctx); nil != err {
    
			log.Fatalf("server shutdown failed, err: %v\n", err)
		}
		log.Println("server gracefully shutdown")

		fmt.Println(" Has stopped http://localhost:8084")
		// Start listening 
		g.Go(startApp2)
		//app2.Listen(":8084")
		fmt.Println(" Started http://localhost:8084")
		sig = "restart"
	}

	c.WriteString(" Restarted ")
}
func hello1(c iris.Context) {
    
	c.WriteString("hello app1")
}
func hello2(c iris.Context) {
    
	c.WriteString("hello app2")
}

summary

1. Start the program , service 1 Listening port http://localhost:8083, Contains interfaces ：http://localhost:8083/hello1 and http://localhost:8083/restart
2. adopt http://localhost:8083/restart Interface start service 2
3. service 2 After starting , Its interface http://localhost:8084/hello2 Normal use