jedis:subscribe(订阅)断线重连(reconnect)

	/**
	 * 创建消息线程,订阅指定的频道<br>
	 * @param channels 频道名列表
	 */
	private void open(final String... channels){

		Runnable run = new Runnable(){
			String[] subs = channels;
			@Override
			public void run() {
				// 如果连接异常则释放当前连接对象重新申请连接
				for(;;){/** 无限循环,JVM结束时自动关闭线程 */
					try{
						// 获取Jedis实例执行频道订阅
						getJedis().subscribe(jedisPubSub,subs);
						break;
					} catch (JedisConnectionException e) {
						// 释放当前连接再试
						releaseJedis();
						logger.error("Subscribing failed. {}", e.getMessage());
						// 延时后再试
						try {
							Thread.sleep(RECONNECT_DELAY_MILLS);
						} catch (InterruptedException e1) {
						}
						// 从channelSubs获取所有注册频道，重新注册
						subs = channelSubs.keySet().toArray(new String[0]);
					}catch (Exception e) {
						logger.error("Subscribing failed.", e);
					}
				}
			}};
		// subscribeExecutor是一个线程池，JVM结束时自动关闭
		subscribeExecutor.execute(run);
	}