JMS实战2

最新推荐文章于 2024-08-27 15:34:47 发布

wangqiaowqo

最新推荐文章于 2024-08-27 15:34:47 发布

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分类专栏： activemq

本文链接：https://blog.youkuaiyun.com/wangqiaowqo/article/details/84686659

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本文介绍了一种基于Java消息服务(JMS)的消息监听及处理机制。通过自定义的抽象类`AbstractDdshowMessageListener`实现了消息监听的基础功能，并通过具体的实现类如`SendGiftMessageListener`来发送特定类型的消息。同时，详细描述了如何创建和发送`ScreenStatMessage`消息，并展示了如何在消费者端监听并处理此类消息。

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1、封装MessageListener


public abstract class AbstractDdshowMessageListener implements MessageListener {

    protected Logger logger = LoggerFactory.getLogger(getClass());

    @Override
    public void onMessage(Message message){
        logger.debug("Received a message: {}", message.toString());

        StopWatch stopWatch = new Slf4JStopWatch(this.getClass().getName(),
                LoggerFactory.getLogger(LoggingStopWatch.DEFAULT_LOGGER_NAME));
        try {
            doOnMessage(message);
        }finally {
            stopWatch.stop();
        }
    }

    protected abstract void doOnMessage(Message message);

}

2、SendGiftMessageListener 生产者
AbstractDdshowMessageListener 的实现


public class SendGiftMessageListener extends AbstractDdshowMessageListener implements
        InitializingBean {

    @Autowired
    private JmsTemplate jmsTemplate;

    @Autowired
    @Qualifier("imQueue")
    private Queue imQueue;

    @Autowired
    @Qualifier("screenStatQueue")
    private Queue screenStatQueue;

   // 本场排行榜统计
            jmsTemplate.send(screenStatQueue, new ScreenStatMessage(record.getOriginUserId(),
                    record.getTargetUserId(), record.getScreenId(), record.getGiftCoins()));

}

3、消息体ScreenStatMessage


public class ScreenStatMessage implements MessageCreator {
public ScreenStatMessage(int originUserId, int targetUserId, int screenId, int coins) {
        this.originUserId = originUserId;
        this.targetUserId = targetUserId;
        this.screenId = screenId;
        this.coins = coins;
    }

    public ScreenStatMessage(MapMessage message) throws IllegalArgumentException {
        try {
            this.setOriginUserId(message.getInt("originUserId"));
            this.setTargetUserId(message.getInt("targetUserId"));
            this.setScreenId(message.getInt("screenId"));
            this.setCoins(message.getInt("coins"));
        } catch (JMSException ex) {
            throw new IllegalArgumentException(ex);
        }
    }

    public ScreenStatMessage() {
    }

    @Override
    public String toString() {
        return "ScreenStatMessage{" + "originUserId=" + originUserId + ", targetUserId="
                + targetUserId + ", screenId=" + screenId + ", coins=" + coins + '}';
    }

    @Override
    public Message createMessage(Session session) throws JMSException {
        MapMessage message = session.createMapMessage();
        message.setInt("originUserId", this.getOriginUserId());
        message.setInt("targetUserId", this.getTargetUserId());
        message.setInt("screenId", this.getScreenId());
        message.setInt("coins", this.getCoins());
        return message;
    }

}

4、消息配置
applicationContext-mq.xml

<amq:queue id="screenStatQueue" physicalName="${jms.destination.queue.screenstat}" />

5、监听器
applicationContext-listener.xml 在consumer中监听消息，然后发新消息


<context:annotation-config />
	<context:component-scan base-package="com.youku.ddshow" />

	<jms:listener-container concurrency="${jms.listener-container.concurrency}" destination-type="queue">
		<!-- 礼物赠送记录消息监听者 -->
		<jms:listener id="giftSendMessageContainer" destination="${jms.destination.queue.sendgift}"
			ref="giftSendMessageListener" />
</jms:listener-container>

<bean id="giftSendMessageListener" class="com.youku.ddshow.consumer.SendGiftMessageListener">
		<property name="luckyGiftConfigurations" ref="luckyGiftConfiguration" />
	</bean>

6、消费者监听
applicationContext-listener.xml
通过 ${jms.destination.queue.screenstat}


<!-- 场次统计 -->
		<jms:listener destination="${jms.destination.queue.screenstat}" ref="screenStatMessageListener"/>

7、消息名称定义
system-online.properties


jms.destination.queue.screenstat=Q.DDSHOW.SCREENSTAT

8、消费者
applicationContext-listener.xml

<!-- 场次统计 -->
	<bean id="screenStatMessageListener" class="com.youku.ddshow.consumer.ScreenStatMessageListener" />

ScreenStatMessageListener


public class ScreenStatMessageListener extends AbstractDdshowMessageListener {
    @Override
    protected void doOnMessage(Message message) {
        if (message instanceof MapMessage) {
            MapMessage mapMessage = (MapMessage) message;
            ScreenStatMessage statMessage = new ScreenStatMessage(mapMessage);

            int originUserId = statMessage.getOriginUserId();
            int targetUserId = statMessage.getTargetUserId();
            int screenId = statMessage.getScreenId();
            int coins = statMessage.getCoins();

            // 统计
            stat(originUserId, targetUserId, screenId, coins);
        }
    }
}