com.github.likavn.eventbus.provider.redis.RLock Maven / Gradle / Ivy
/**
* Copyright 2023-2033, likavn ([email protected]).
*
* 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 com.github.likavn.eventbus.provider.redis;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.script.DefaultRedisScript;
import java.util.Collections;
/**
* redis分布式锁
*
* @author likavn
* @date 2023/2/22
**/
public class RLock {
/**
* 分布式锁过期时间,单位：秒
*/
private static final Long LOCK_REDIS_TIMEOUT = 30L;
private final StringRedisTemplate stringRedisTemplate;
private final DefaultRedisScript lockRedisScript;
public RLock(StringRedisTemplate stringRedisTemplate, DefaultRedisScript lockRedisScript) {
this.stringRedisTemplate = stringRedisTemplate;
this.lockRedisScript = lockRedisScript;
}
/**
* 获取锁,默认超时时间30s
*
* @param key key
* @return t
*/
public boolean getLock(String key) {
return getLock(key, LOCK_REDIS_TIMEOUT);
}
/**
* 获取锁
*
* @param key key
* @param timeout 超时时间，单位：秒
* @return t
*/
public boolean getLock(String key, long timeout) {
Boolean flag = stringRedisTemplate.execute(lockRedisScript, Collections.singletonList(key), "" + timeout);
return Boolean.TRUE.equals(flag);
}
/**
* 释放锁
*
* @param key k
*/
public void releaseLock(String key) {
stringRedisTemplate.delete(key);
}
}