demo/etcd/lock/test.go

package main

import (
	"context"
	"fmt"
	clientv3 "go.etcd.io/etcd/client/v3"
	"go.etcd.io/etcd/client/v3/concurrency"
	"time"
)

func main() {
	cli, err := clientv3.New(clientv3.Config{
		Endpoints:   []string{"106.54.33.152:2379"},
		DialTimeout: 5 * time.Second,
	})
	if err != nil {
		panic(err)
	}
	defer cli.Close()

	for i := 0; i < 10; i++ {

		go func(i int) {
			m, err := NewPciLock(cli)
			if err != nil {
				fmt.Printf("Error creating")
			}
			m.IsOwner()
			err = m.Lock(context.Background())
			if err != nil {
				fmt.Printf("Failed to lock: %v\n", err)
				return
			}
			if i == 1 {
				time.Sleep(time.Second * 10)
			}
			fmt.Println(i)
			err = m.Unlock(context.Background())
			if err != nil {
				fmt.Printf("Failed to Unlock: %v\n", err)
				return
			}
		}(i)
	}
	time.Sleep(time.Second * 15)
}

func NewPciLock(etcd *clientv3.Client) (*concurrency.Mutex, error) {
	session, err := concurrency.NewSession(etcd, concurrency.WithTTL(5))
	if err != nil {
		return nil, err
	}

	m := concurrency.NewMutex(session, "hstack/server/pciLock")

	return m, nil
}