redis 消息的訂閱發佈 Java 實現 消息生產者 消息消費者

參考：https://www.cnblogs.com/qlqwjy/p/9763754.html

1.發佈消息（消息生產者 MessageProducer）：

public static final String CHANNEL_KEY = "channel:1";
jedis.publish(CHANNEL_KEY, message);

2.訂閱消息（消息消費者）：

/**
 * 消息消費者
 *
 * @author hxx
 */
public class MessageConsumer implements Runnable {

    /**
     * 頻道
     */
    public static final String CHANNEL_KEY = "channel:1";

    /**
     * 處理接收消息
     */
    private AlarmJedisPubSub alarmJedisPubSub = new AlarmJedisPubSub();

    /**
     * Logger
     */
    private static Logger LOG = LoggerFactory.getLogger(MessageConsumer.class);

    @Override
    public void run() {
        Jedis jedis = null;
        try {
            jedis = JedisPoolUtils.getPublicJedis();
            jedis.subscribe(alarmJedisPubSub, CHANNEL_KEY);
        }
        catch (Exception e) {
            LOG.error("消費消息失敗：" + e.getMessage(), e);
        }
        finally {
            JedisPoolUtils.returnRes(jedis);
        }
    }

    /**
     * 接收到消息後推給前端
     *
     * @author ab
     */
    class AlarmJedisPubSub extends JedisPubSub {
        @Override
        public void onMessage(String channel, String message) {
            LOG.info("接收到來自頻道" + channel + "的消息：" + message);
            ResinWebSocketListener.sendToOneUser(JSON.parseObject(message), message, "msg");
        }
    }

    /**
     * 測試
     *
     * @param args args
     */
    public static void main(String[] args) {
        MessageConsumer messageConsumer = new MessageConsumer();
        Thread t1 = new Thread(messageConsumer);
        t1.start();
    }
}