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package com.gc.easy.redis.service;

import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.concurrent.TimeUnit;

/**
 * @Auther: gc.x
 * @Date: 2020/8/6 15:03
 * @Description:
 */
@Component
public class RedissonDistributedLocker implements DistributedLocker {

    @Autowired
    private RedissonClient redissonClient;

    // lock(), 拿不到lock就不罢休，不然线程就一直block
    @Override
    public RLock lock(String lockKey) {
        RLock lock = redissonClient.getLock(lockKey);
        lock.lock();
        return lock;
    }

    // leaseTime为加锁时间，单位为秒
    @Override
    public RLock lock(String lockKey, long leaseTime) {
        RLock lock = redissonClient.getLock(lockKey);
        lock.lock(leaseTime, TimeUnit.SECONDS);
        return null;
    }

    // timeout为加锁时间，时间单位由unit确定
    @Override
    public RLock lock(String lockKey, TimeUnit unit, long timeout) {
        RLock lock = redissonClient.getLock(lockKey);
        lock.lock(timeout, unit);
        return lock;
    }

    @Override
    public boolean tryLock(String lockKey, TimeUnit unit, long waitTime, long leaseTime) {
        RLock lock = redissonClient.getLock(lockKey);
        try {
            return lock.tryLock(waitTime, leaseTime, unit);
        } catch (InterruptedException e) {
            return false;
        }
    }

    @Override
    public void unlock(String lockKey) {
        RLock lock = redissonClient.getLock(lockKey);
        lock.unlock();
    }

    @Override
    public void unlock(RLock lock) {
        lock.unlock();
    }

    @Override
    public void release(String lockKey) {
        RLock lock = redissonClient.getLock(lockKey);
        //查询当前线程是否保持此锁定
        if (lock.isHeldByCurrentThread()) {
            lock.unlockAsync();
        }
    }
}