RocketMQ集成Springboot --Chapter5

RocketMQ tag过滤和sql92语法过滤

tag过滤

生产者，由于springboot没有专门对mq进行tag标记的方法，只是在topic:后面加上，所以只需 rocketMQTemplate.sendOneWay(“tagFilterBoot:TagA”,msg1);标记即可

生产者代码如下

    /**
     *生产者
     * tag过滤
     */
    @Test
    public void sendTagFilterMsg(){
        Message msg1 = MessageBuilder.withPayload("消息A").build();
        rocketMQTemplate.sendOneWay("tagFilterBoot:TagA",msg1);

        Message msg2 = MessageBuilder.withPayload("消息B").build();
        rocketMQTemplate.sendOneWay("tagFilterBoot:TagB",msg2);

        Message msg3 = MessageBuilder.withPayload("消息C").build();
        rocketMQTemplate.sendOneWay("tagFilterBoot:TagC",msg3);
    }

消费者在注解处添加selectorExpression = "TagA || TagC"表达式选项即可。

消费者代码如下

  /**
     *消费者
     * tag过滤
     */
@Component
@RocketMQMessageListener(consumerGroup = "tagFilterGroupBoot",topic = "tagFilterBoot",selectorExpression = "TagA || TagC")
public class TagFilterTopicListener implements RocketMQListener<MessageExt> {
    @Override
    public void onMessage(MessageExt messageExt) {
        System.out.println("收到的消息:"+new String(messageExt.getBody(), Charset.defaultCharset()));
    }
}

sql92过滤

生产者 setHeader就是设置属性

生产者代码如下

    /**
     * sql92过滤
     */
    @Test
    public void sendSQL92FilterMsg(){
        Message msg1 = MessageBuilder.withPayload("美女A，年龄22，体重45")
                .setHeader("age",22)
                .setHeader("weight",45)
                .build();
        rocketMQTemplate.sendOneWay("SQL92FilterBoot",msg1);

        Message msg2 = MessageBuilder.withPayload("美女B，年龄33，体重65")
                .setHeader("age",33)
                .setHeader("weight",65)
                .build();
        rocketMQTemplate.sendOneWay("SQL92FilterBoot",msg2);

        Message msg3 = MessageBuilder.withPayload("美女C，年龄55，体重99")
                .setHeader("age",55)
                .setHeader("weight",99)
                .build();
        rocketMQTemplate.sendOneWay("SQL92FilterBoot",msg3);
    }

消费者 只需要加上如下注解即可
selectorType = SelectorType.SQL92,selectorExpression = “age>23 and weight>80”
selectorType设置类型
selectorExpression过滤条件

消费者代码如下

@Component
@RocketMQMessageListener(consumerGroup = "SQL92FilterGroupBoot",topic = "SQL92FilterBoot",selectorType = SelectorType.SQL92,selectorExpression = "age>23 and weight>80")
public class SQL92FilterTopicListener implements RocketMQListener<MessageExt> {
    @Override
    public void onMessage(MessageExt messageExt) {
        System.out.println("收到的消息:"+new String(messageExt.getBody(), Charset.defaultCharset()));
    }
}