8_多服务运行.md

运行多个服务

gin可以在多个端口启动服务，例如：

package main
 
import (
	"log"
	"net/http"
	"time"
 
	"github.com/gin-gonic/gin"
	"golang.org/x/sync/errgroup"
)
 
var (
	g errgroup.Group
)
 
func router01() http.Handler {
	e := gin.New()
	e.Use(gin.Recovery())
	e.GET("/", func(c *gin.Context) {
		c.JSON(
			http.StatusOK,
			gin.H{
				"code":  http.StatusOK,
				"error": "Welcome server 01",
			},
		)
	})
 
	return e
}
 
func router02() http.Handler {
	e := gin.New()
	e.Use(gin.Recovery())
	e.GET("/", func(c *gin.Context) {
		c.JSON(
			http.StatusOK,
			gin.H{
				"code":  http.StatusOK,
				"error": "Welcome server 02",
			},
		)
	})
 
	return e
}
 
func main() {
	server01 := &http.Server{
		Addr:         ":8080",
		Handler:      router01(),
		ReadTimeout:  5 * time.Second,
		WriteTimeout: 10 * time.Second,
	}
 
	server02 := &http.Server{
		Addr:         ":8081",
		Handler:      router02(),
		ReadTimeout:  5 * time.Second,
		WriteTimeout: 10 * time.Second,
	}
   // 借助errgroup.Group或者自行开启两个goroutine分别启动两个服务
	g.Go(func() error {
		return server01.ListenAndServe()
	})
 
	g.Go(func() error {
		return server02.ListenAndServe()
	})
 
	if err := g.Wait(); err != nil {
		log.Fatal(err)
	}
}