完善 rabbitmq 用例注释
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罗祥
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@ -20,18 +20,18 @@ import org.springframework.stereotype.Component;
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public class RabbitmqConsumer {
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@RabbitListener(bindings = @QueueBinding(
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value = @Queue(value = RabbitInfo.QUEUE_NAME, durable = RabbitInfo.QUEUE_DURABLE),
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exchange = @Exchange(value = RabbitInfo.EXCHANGE_NAME, type = RabbitInfo.EXCHANGE_TYPE),
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key = RabbitInfo.ROUTING_KEY)
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value = @Queue(value = RabbitInfo.QUEUE_NAME, durable = RabbitInfo.QUEUE_DURABLE),
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exchange = @Exchange(value = RabbitInfo.EXCHANGE_NAME, type = RabbitInfo.EXCHANGE_TYPE),
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key = RabbitInfo.ROUTING_KEY)
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)
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@RabbitHandler
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public void onMessage(Message message, Channel channel) throws Exception {
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MessageHeaders headers = message.getHeaders();
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// 获取消息头信息和消息体
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log.info("msgInfo:{} ; payload:{} ",headers.get("msgInfo"),message.getPayload());
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// DELIVERY_TAG 是一个自增的数值
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log.info("msgInfo:{} ; payload:{} ", headers.get("msgInfo"), message.getPayload());
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// DELIVERY_TAG 代表 RabbitMQ 向该Channel投递的这条消息的唯一标识ID，是一个单调递增的正整数
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Long deliveryTag = (Long) headers.get(AmqpHeaders.DELIVERY_TAG);
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// 第二个参数代表是否一次签收多条,当该参数为 true 时，则可以一次性确认 delivery_tag 小于等于传入值的所有消息
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// 第二个参数代表是否一次签收多条,当该参数为 true 时，则可以一次性确认 DELIVERY_TAG 小于等于传入值的所有消息
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channel.basicAck(deliveryTag, false);
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}
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@ -1,14 +1,14 @@
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spring:
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rabbitmq:
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addresses: 192.168.0.108:5672
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addresses: 127.0.0.1:5672
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# RabbitMQ 默认的用户名和密码都是guest 而虚拟主机名称是 "/"
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# 如果配置其他虚拟主机地址，需要预先用管控台或者图形界面创建 图形界面地址 http://主机地址:15672
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username: admin
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password: admin
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virtual-host: my_vhost
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username: guest
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password: guest
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virtual-host: /
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listener:
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simple:
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# 签收模式设置为手工签收
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# 为了保证信息能够被正确消费,建议签收模式设置为手工签收,并在代码中实现手工签收
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acknowledge-mode: manual
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# 侦听器调用者线程的最小数量
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concurrency: 10
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@ -1,6 +1,7 @@
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package com.heibaiying.rabbitmq.producer;
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import lombok.extern.slf4j.Slf4j;
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import org.apache.tomcat.util.codec.binary.Base64;
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import org.springframework.amqp.rabbit.connection.CorrelationData;
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import org.springframework.amqp.rabbit.core.RabbitTemplate;
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import org.springframework.beans.factory.annotation.Autowired;
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@ -9,6 +10,7 @@ import org.springframework.messaging.MessageHeaders;
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import org.springframework.messaging.support.MessageBuilder;
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import org.springframework.stereotype.Component;
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import java.io.UnsupportedEncodingException;
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import java.util.Map;
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/**
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@ -22,22 +24,28 @@ public class RabbitmqProducer {
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@Autowired
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private RabbitTemplate rabbitTemplate;
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public void sendSimpleMessage( Map<String, Object> headers,Object message,
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public void sendSimpleMessage(Map<String, Object> headers, Object message,
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String messageId, String exchangeName, String key) {
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// 自定义消息头
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MessageHeaders messageHeaders = new MessageHeaders(headers);
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// 创建消息
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Message<Object> msg = MessageBuilder.createMessage(message, messageHeaders);
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// 确认的回调 确认消息是否到达 Broker 服务器
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/* 确认的回调 确认消息是否到达 Broker 服务器 其实就是是否到达交换器
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如果发送时候指定的交换器不存在 ack就是false 代表消息不可达 */
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rabbitTemplate.setConfirmCallback((correlationData, ack, cause) -> {
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//当ack为false时才表示消息不可达，才需要进行对应的消息补偿机制
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log.info("correlationData：{} , ack:{}", correlationData.getId(),ack);
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log.info("correlationData：{} , ack:{}", correlationData.getId(), ack);
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if (!ack) {
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System.out.println("进行对应的消息补偿机制");
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}
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});
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// 消息失败的回调
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/* 消息失败的回调
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* 例如消息已经到达交换器上，但路由键匹配任何绑定到该交换器的队列，会触发这个回调，此时 replyText: NO_ROUTE
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*/
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rabbitTemplate.setReturnCallback((message1, replyCode, replyText, exchange, routingKey) -> {
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log.info("message:{}; replyCode{}; replyText{} ;", message1.getBody(), replyCode, replyText);
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log.info("message:{}; replyCode: {}; replyText: {} ; exchange:{} ; routingKey:{}",
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message1, replyCode, replyText, exchange, routingKey);
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});
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// 在实际中ID 应该是全局唯一 能够唯一标识消息
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// 在实际中ID 应该是全局唯一 能够唯一标识消息 消息不可达的时候触发ConfirmCallback回调方法时可以获取该值，进行对应的错误处理
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CorrelationData correlationData = new CorrelationData(messageId);
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rabbitTemplate.convertAndSend(exchangeName, key, msg, correlationData);
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}
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@ -1,11 +1,11 @@
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spring:
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rabbitmq:
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addresses: 192.168.0.108:5672
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addresses: 127.0.0.1:5672
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# RabbitMQ 默认的用户名和密码都是guest 而虚拟主机名称是 "/"
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# 如果配置其他虚拟主机地址，需要预先用管控台或者图形界面创建 图形界面地址 http://主机地址:15672
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username: admin
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password: admin
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virtual-host: my_vhost
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username: guest
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password: guest
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virtual-host: /
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# 是否启用发布者确认 具体确认回调实现见代码
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publisher-confirms: true
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# 是否启用发布者返回 具体返回回调实现见代码
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@ -21,6 +21,9 @@ public class RabbitmqProducerTests {
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@Autowired
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private RabbitmqProducer producer;
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/***
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* 发送消息体为简单数据类型的消息
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*/
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@Test
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public void send() {
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Map<String, Object> heads = new HashMap<>();
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@ -31,6 +34,9 @@ public class RabbitmqProducerTests {
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}
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/***
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* 发送消息体为bean的消息
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*/
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@Test
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public void sendBean() {
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String id = String.valueOf(Math.round(Math.random() * 10000));
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