使用redisson構建簡單的分佈式鎖

1.增長依賴

<dependency>
      <groupId>org.redisson</groupId>
      <artifactId>redisson</artifactId>
      <version>2.9.0</version>
    </dependency>
    <!--com.fasterxml.jackson.dataformat.avro.PackageVersion-->
    <dependency>
      <groupId>com.fasterxml.jackson.dataformat</groupId>
      <artifactId>jackson-dataformat-avro</artifactId>
      <version>2.9.0</version>
    </dependency>

2.初始化redission

import lombok.extern.slf4j.Slf4j;
import org.redisson.Redisson;
import org.redisson.config.Config;
import org.springframework.stereotype.Component;
import javax.annotation.PostConstruct;
@Slf4j
@Component
public class RedissonManager {
//redisson支持單實例模式，不支持分佈式
    private Config config = new Config();
    private Redisson redisson = null;
    private final static String redis1Ip = PropertiesUtil.getProperty("redis1.ip");
    private final static Integer redis1Port = Integer.parseInt(PropertiesUtil.getProperty("redis1.port"));
    //注入到Spring容器的話，使用@PostConstruct或者靜態塊初始化，效果是同樣的{}
    @PostConstruct
    private void init() {
        try {
            ////127.0.0.1:6379
//            config.useSingleServer().setAddress(new StringBuilder().append(redis1Ip).append(":").append(redis1Port).toString());
            //單主模式
//            config.useMasterSlaveServers().setMasterAddress(new StringBuilder().append(redis1Ip).append(":").append(redis1Port).toString());
            //主從模式
//            config.useMasterSlaveServers().setMasterAddress("127.0.0.1:6379").addSlaveAddress("127.0.0.1:6380");
//            redisson = (Redisson) Redisson.create(config);
            log.info("初始化Redisson結束");
        } catch (Exception e) {
            log.error("redisson init error", e);
        }
    }
//    {
//        init();
//    }
    public Redisson getRedisson() {
        return redisson;
    }

}

 

3.使用

/**
     * Redisson分佈式鎖實現
     * @throws InterruptedException
     */
//    @Scheduled(cron="0 */1 * * * ?")//每1分鐘(每一個1分鐘的整數倍)
    public void closeOrderTaskV4() throws InterruptedException {
        RLock lock = redissonManager.getRedisson().getLock(Const.REDIS_LOCK.CLOSE_ORDER_TASK_LOCK);
        boolean getLock = false;
        try {
            if(getLock = lock.tryLock(2,5, TimeUnit.SECONDS)){//trylock增長鎖
                log.info("===獲取{},ThreadName:{}",Const.REDIS_LOCK.CLOSE_ORDER_TASK_LOCK,Thread.currentThread().getName());
                int hour = Integer.parseInt(PropertiesUtil.getProperty("close.order.task.time.hour","2"));
                iOrderService.closeOrder(hour);
            }else{
                log.info("===沒有得到分佈式鎖:{}",Const.REDIS_LOCK.CLOSE_ORDER_TASK_LOCK);
            }
        }finally {
            if(!getLock){
                return;
            }
            log.info("===釋放分佈式鎖:{}",Const.REDIS_LOCK.CLOSE_ORDER_TASK_LOCK);
            lock.unlock();
        }
    }