package jnpf.flowable.util;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.data.redis.core.RedisTemplate;
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import org.springframework.data.redis.core.script.DefaultRedisScript;
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import org.springframework.data.redis.core.script.RedisScript;
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import org.springframework.stereotype.Component;
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import java.util.Collections;
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import java.util.concurrent.TimeUnit;
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/**
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* 类的描述
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*
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* @author JNPF@YinMai Info. Co., Ltd
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* @version 5.0.x
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* @since 2025/1/9 14:19
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*/
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@Component
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public class RedisLock {
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private static final String LOCK_KEY_PREFIX = "workflow-lock:";
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@Autowired
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private RedisTemplate<String, Object> redisTemplate;
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private String getLockKey(String lockName) {
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return LOCK_KEY_PREFIX + lockName;
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}
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// false表示设置失败
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public boolean lock(String lockName, String lockValue, long expireTime, TimeUnit unit) {
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Boolean result = redisTemplate.opsForValue().setIfAbsent(getLockKey(lockName), lockValue, unit.toSeconds(expireTime), TimeUnit.SECONDS);
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return result != null && result;
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}
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public boolean unlock(String lockName, String lockValue) {
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String script = "if redis.call('get', KEYS[1]) == ARGV[1] then return redis.call('del', KEYS[1]) else return 0 end";
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RedisScript<Long> redisScript = new DefaultRedisScript<>(script, Long.class);
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Long result = redisTemplate.execute(redisScript, Collections.singletonList(getLockKey(lockName)), Collections.singletonList(lockValue));
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return result != null && result > 0;
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}
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}
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