/
lock.go
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/
lock.go
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// Copyright 2020 Douyu
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package etcdv3
import (
"context"
"time"
"go.etcd.io/etcd/client/v3/concurrency"
)
// Mutex ...
type Mutex struct {
s *concurrency.Session
m *concurrency.Mutex
}
// NewMutex ...
func (client *Client) NewMutex(key string, opts ...concurrency.SessionOption) (mutex *Mutex, err error) {
mutex = &Mutex{}
// 默认session ttl = 60s
mutex.s, err = concurrency.NewSession(client.Client, opts...)
if err != nil {
return
}
mutex.m = concurrency.NewMutex(mutex.s, key)
return
}
// Lock ...
func (mutex *Mutex) Lock(timeout time.Duration) (err error) {
ctx, cancel := context.WithTimeout(context.Background(), timeout)
defer cancel()
return mutex.m.Lock(ctx)
}
// TryLock ...
func (mutex *Mutex) TryLock(timeout time.Duration) (err error) {
ctx, cancel := context.WithTimeout(context.Background(), timeout)
defer cancel()
return mutex.m.Lock(ctx)
}
// Unlock ...
func (mutex *Mutex) Unlock() (err error) {
err = mutex.m.Unlock(context.TODO())
if err != nil {
return
}
return mutex.s.Close()
}