feat: add lock

examples/etcd/main.go

@@ -80,7 +80,7 @@ func startServer() (*machinery.Server, error) {
 	}
 
 	// lock := redislock.New(cnf, []string{"localhost:6379"}, 3, 2)
-	lock, err := etcdlock.New(cnf, "http://127.0.0.1:2379", 3)
+	lock, err := etcdlock.New(context.Background(), "http://127.0.0.1:2379", 3)
 	if err != nil {
 		return nil, err
 	}

locks/etcd/etcd.go

@@ -7,7 +7,6 @@ import (
 	"strings"
 	"time"
 
-	"github.com/RichardKnop/machinery/v2/config"
 	"github.com/RichardKnop/machinery/v2/locks/iface"
 	"github.com/RichardKnop/machinery/v2/log"
 	clientv3 "go.etcd.io/etcd/client/v3"
@@ -15,49 +14,55 @@ import (
 )
 
 var (
-	ErrRedisLockFailed = errors.New("redis lock: failed to acquire lock")
+	// ErrLockFailed ..
+	ErrLockFailed = errors.New("etcd lock: failed to acquire lock")
 )
 
 type etcdLock struct {
-	globalConf *config.Config
-	conf       clientv3.Config
 	cli     *clientv3.Client
 	retries int
 }
 
-func New(cnf *config.Config, endpoint string, retries int) (iface.Lock, error) {
-	etcdConf := clientv3.Config{Endpoints: []string{endpoint}}
+// New ..
+func New(ctx context.Context, endpoint string, retries int) (iface.Lock, error) {
+	etcdConf := clientv3.Config{
+		Endpoints:   []string{endpoint},
+		Context:     ctx,
+		DialTimeout: time.Second * 5,
+	}
+
 	cli, err := clientv3.New(etcdConf)
 	if err != nil {
 		return nil, err
 	}
 
 	lock := etcdLock{
-		globalConf: cnf,
-		conf:       etcdConf,
 		cli:     cli,
 		retries: retries,
 	}
 
 	return &lock, nil
-
 }
 
+// LockWithRetries ..
 func (r etcdLock) LockWithRetries(key string, unixTsToExpireNs int64) error {
-	for i := 0; i < r.retries; i++ {
+	i := 0
+	for ; i < r.retries; i++ {
 		err := r.Lock(key, unixTsToExpireNs)
 		if err == nil {
 			// 成功拿到锁，返回
 			return nil
 		}
 
-		log.INFO.Printf("acquired lock=%s failed, retries=%d, err=%s", key, i, err)
+		log.DEBUG.Printf("acquired lock=%s failed, retries=%d, err=%s", key, i, err)
 		time.Sleep(time.Millisecond * 100)
 	}
 
-	return ErrRedisLockFailed
+	log.INFO.Printf("acquired lock=%s failed, retries=%d", key, i)
+	return ErrLockFailed
 }
 
+// Lock ..
 func (r etcdLock) Lock(key string, unixTsToExpireNs int64) error {
 	now := time.Now().UnixNano()
 	ttl := time.Duration(unixTsToExpireNs + 1 - now)