微服务分布式锁

 

 

分布式锁切面类

/**
 * Redis缓存分布式锁切面类
 * created by huangbaidong
 * created date 2017-03-30
 */
@Aspect
@Component
public class RedisCacheDistributedLockAspect {
    public static final Logger LOG = Logger.getLogger(RedisCacheDistributedLockAspect.class);

    @Value("${time.server.port}")
    private Integer port;
    @Value("${time.server.host}")
    private String host;
    
    @Resource
    private RedisUtil redisUtil;

    protected RedisBasedDistributedLock payingOrderLock = null;
    private static final String PAYING_ORDER_LOCK_KEY = "paying.order.lock";
    private static final long LOCK_EXPIRE = 5 * 1000;

    /**
     * 初始化锁信息
     */
    @PostConstruct
    public void init() {
        try {
            //时间服务器地址信息
            SocketAddress addr = new InetSocketAddress(host, port);
            //初始化锁
            payingOrderLock = new RedisBasedDistributedLock(redisUtil, PAYING_ORDER_LOCK_KEY, LOCK_EXPIRE, addr);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }



    /**
     * 在需要同步的方法前后加锁
     * @param jp
     * @return
     * @throws Throwable
     */
    @Around("execution(* com.coracle.positec.cache.impl.BsdOrderCacheImpl.add*(..))" +
            "|| execution(* com.coracle.positec.cache.impl.BsdOrderCacheImpl.remove*(..))" +
            "|| execution(* com.coracle.positec.cache.impl.BsdOrderCacheImpl.update*(..))" +
            "|| execution(* com.coracle.positec.cache.impl.BsdOrderCacheImpl.load*(..))")
    public Object payingOrderSyncLock(ProceedingJoinPoint jp) throws Throwable {
        Object o = null;
        if(payingOrderLock.tryLock(3, TimeUnit.SECONDS)) {
            try {
                o = jp.proceed(jp.getArgs());
            } finally {
                payingOrderLock.unlock();
            }
        }
        return o;
    }
}