RabbitMQ 消息类型
下面我们简单介绍下RabbitMQ的一些消息种类,并结合Java代码进行学习。
如果需要执行代码,需要下载RabbitMQ的客户端(例如java客户端: https://www.rabbitmq.com/java-client.html)
使用maven:
<dependency><groupId>com.rabbitmq</groupId><artifactId>amqp-client</artifactId><version>5.16.0</version></dependency>
注意先启动消费者,在启动生产者
5.x 版本系列需要 JDK 8
java-client 的文档:https://rabbitmq.github.io/rabbitmq-java-client/api/current/index.html
创建一个连接工具类ConnectionUtil
importcom.rabbitmq.client.Connection;importcom.rabbitmq.client.ConnectionFactory;importjava.io.IOException;importjava.util.concurrent.TimeoutException;/**
* 类描述:
* 连接工具类
* @author cfl
* @version 1.0
* @date 2022/10/10 13:49
*/publicclassConnectionUtil{/**
* 获取MQ的连接
* @return
*/publicstaticConnectiongetConnection()throwsIOException,TimeoutException{// 定义一个连接工厂ConnectionFactory factory =newConnectionFactory();// 设置服务地址
factory.setHost("localhost");// AMQP 5672
factory.setPort(5672);// vhost
factory.setVirtualHost("/vhost01");// 用户名
factory.setUsername("admin");// 密码
factory.setPassword("123456");return factory.newConnection();}}
simple 简单队列
P:消息生产者
红色:队列
C:消费者
3个对象:生产者 队列 消费者
生产者直接发送消息到队列,消费者直接从队列获取消息。发送消息时,只需要指定队列,不需要指定交换机,以及路由key,只有一个消费者。
示例
- 消息生产者:Send
importcom.goudong.modules.rabbitmq.demo.util.ConnectionUtil;importcom.rabbitmq.client.Channel;importcom.rabbitmq.client.Connection;importjava.io.IOException;importjava.util.concurrent.TimeoutException;/**
* 类描述:
* 简单队列,消息生产者
* @author cfl
* @version 1.0
* @date 2022/10/10 13:58
*/publicclassSend{privatestaticfinalStringQUEUE_NAME="test_simple_queue";publicstaticvoidmain(String[] args)throwsIOException,TimeoutException{// 获取一个连接Connection connection =ConnectionUtil.getConnection();// 从连接中获取一个通道Channel channel = connection.createChannel();// 声明一个队列
channel.queueDeclare(QUEUE_NAME,false,false,false,null);String message ="hello simple !";// 第一个参数是exchangeName(默认情况下代理服务器端是存在一个""名字的exchange的,
channel.basicPublish("",QUEUE_NAME,null, message.getBytes());System.out.println("send message");
channel.close();
connection.close();}}
- 消息消费者:Recv
importcom.goudong.modules.rabbitmq.demo.util.ConnectionUtil;importcom.rabbitmq.client.*;importjava.io.IOException;importjava.util.concurrent.TimeoutException;/**
* 类描述:
* 简单队列,消息消费者
* @author cfl
* @version 1.0
* @date 2022/10/10 14:00
*/publicclassRecv{privatestaticfinalStringQUEUE_NAME="test_simple_queue";publicstaticvoidmain(String[] args)throwsIOException,TimeoutException{// 获取连接Connection connection =ConnectionUtil.getConnection();// 创建通道Channel channel = connection.createChannel();// 队列声明
channel.queueDeclare(QUEUE_NAME,false,false,false,null);// 定义队列的消费者DefaultConsumer defaultConsumer =newDefaultConsumer(channel){// 获取到达的消息@OverridepublicvoidhandleDelivery(String consumerTag,Envelope envelope,AMQP.BasicProperties properties,byte[] body)throwsIOException{String msgString =newString(body,"utf-8");System.out.println("new api recv: "+ msgString);}};// 监听队列
channel.basicConsume(QUEUE_NAME,true, defaultConsumer);}}
简单队列的不足:耦合性高,生产者一一对应消费者(如果我想有多个消费者消费队列中消息,这时候就不行),队列名变更,这时候得同时变更。
work queues 工作队列
工作队列可以细分为轮询分发和公平分发。发送消息时,只需要指定队列,不需要指定交换机,以及路由key,设定多个消费者。
为什么会出现工作队列,因为simple 队列是一一对应的,而且我们实际开发,生产者发送消息是毫不费力的,而消费者一般是要跟业务相结合的,消费者接收到消息之后就需要处理,可能需要花费时间,这时候队列就会积压了很多消息。
round robin 轮询分发
- 消息生产者:Send
importcom.goudong.modules.rabbitmq.demo.util.ConnectionUtil;importcom.rabbitmq.client.Channel;importcom.rabbitmq.client.Connection;importjava.io.IOException;importjava.util.concurrent.TimeoutException;/**
* 类描述:
* 工作队列,轮询分发,消息生产者
* @author cfl
* @version 1.0
* @date 2022/10/10 14:12
*/publicclassSend{publicstaticfinalStringQUEUE_NAME="test_round_robin_work_queue";/**
* |--> C2
* P ---> Queue ----|
* |--> C1
* @param args
* @throws IOException
* @throws TimeoutException
*/publicstaticvoidmain(String[] args)throwsIOException,TimeoutException,InterruptedException{// 获取连接Connection connection =ConnectionUtil.getConnection();// 获取channelChannel channel = connection.createChannel();// 声明队列
channel.queueDeclare(QUEUE_NAME,false,false,false,null);// 发送消息for(int i =0; i <50; i++){String msg="send hello "+ i;
channel.basicPublish("",QUEUE_NAME,null, msg.getBytes());System.out.println("【WQ】 send msg = "+ msg);Thread.sleep(i*20);}// 关闭资源
channel.close();
connection.close();}}
- 消息消费者:Recv1
importcom.goudong.modules.rabbitmq.demo.util.ConnectionUtil;importcom.rabbitmq.client.*;importjava.io.IOException;importjava.util.concurrent.TimeoutException;/**
* 类描述:
* 工作队列,轮询分发,消息消费者1号
* @author cfl
* @version 1.0
* @date 2022/10/10 14:14
*/publicclassRecv1{publicstaticfinalStringQUEUE_NAME="test_round_robin_work_queue";publicstaticvoidmain(String[] args)throwsIOException,TimeoutException{// 获取连接Connection connection =ConnectionUtil.getConnection();// 获取channelChannel channel = connection.createChannel();// 声明队列
channel.queueDeclare(QUEUE_NAME,false,false,false,null);// 定义一个消费者Consumer consumer =newDefaultConsumer(channel){// 消息到达,触发这个方法@OverridepublicvoidhandleDelivery(String consumerTag,Envelope envelope,AMQP.BasicProperties properties,byte[] body)throwsIOException{String msg =newString(body,"utf-8");System.out.println("Recv [1] msg = "+ msg);try{Thread.sleep(2000);}catch(InterruptedException e){
e.printStackTrace();}finally{System.out.println("Recv [1] done!");}}};// 监听队列boolean autoAck =true;
channel.basicConsume(QUEUE_NAME, autoAck, consumer);}}
- 消息消费者:Recv2
importcom.goudong.modules.rabbitmq.demo.util.ConnectionUtil;importcom.rabbitmq.client.*;importjava.io.IOException;importjava.util.concurrent.TimeoutException;/**
* 类描述:
* 工作队列,轮询分发,消息消费者2号
* @author cfl
* @version 1.0
* @date 2022/10/10 14:14
*/publicclassRecv2{publicstaticfinalStringQUEUE_NAME="test_round_robin_work_queue";publicstaticvoidmain(String[] args)throwsIOException,TimeoutException{// 获取连接Connection connection =ConnectionUtil.getConnection();// 获取channelChannel channel = connection.createChannel();// 声明队列
channel.queueDeclare(QUEUE_NAME,false,false,false,null);// 定义一个消费者DefaultConsumer defaultConsumer =newDefaultConsumer(channel){// 消息到达,触发这个方法@OverridepublicvoidhandleDelivery(String consumerTag,Envelope envelope,AMQP.BasicProperties properties,byte[] body)throwsIOException{String msg =newString(body,"utf-8");System.out.println("Recv [2] msg = "+ msg);try{Thread.sleep(1000);}catch(InterruptedException e){
e.printStackTrace();}finally{System.out.println("Recv [2] done!");}}};// 监听队列boolean autoAck =true;
channel.basicConsume(QUEUE_NAME, autoAck, defaultConsumer);}}
现象:
- 消费者1 和消费者2处理消息的数量是一样的。
- 消费者1:偶数。
- 消费者2:奇数。
- 这种方式叫做轮询分发(round-robin)结果就是不管谁忙或者谁清闲 都不会多给一个消息,任务总是你一个我一个。
fair dispatch 公平分发
公平分发,需要消费者进行手动回执
// MQ一次只发一个请求给消费者,当消费者处理完消息后会手动回执,然后MQ再发一个消息给消费者
channel.basicQos(1);boolean autoAck =false;//false 手动回执,处理完消息后,告诉MQ
channel.basicConsume(QUEUE_NAME, autoAck, defaultConsumer);
- 消息生产者:Send
importcom.goudong.modules.rabbitmq.demo.util.ConnectionUtil;importcom.rabbitmq.client.Channel;importcom.rabbitmq.client.Connection;importjava.io.IOException;importjava.util.concurrent.TimeoutException;/**
* 类描述:
* 工作队列,公平分发,消息生产者
* @author cfl
* @version 1.0
* @date 2022/10/10 14:30
*/publicclassSend{publicstaticfinalStringQUEUE_NAME="test_fair_dispatch_work_queue";/**
* |--> C2
* P ---> Queue ----|
* |--> C1
* @param args
* @throws IOException
* @throws TimeoutException
*/publicstaticvoidmain(String[] args)throwsIOException,TimeoutException,InterruptedException{// 获取连接Connection connection =ConnectionUtil.getConnection();// 获取channelChannel channel = connection.createChannel();// 声明队列
channel.queueDeclare(QUEUE_NAME,false,false,false,null);/**
* 每个消费者 发送确认消息之前,消息队列不发送下一个消息到消费者,一次只处理一个消息
* 限制发送给同一个消费者 不得超过一条消息
*/
channel.basicQos(1);// 发送消息for(int i =0; i <50; i++){String msg="send hello "+ i;
channel.basicPublish("",QUEUE_NAME,null, msg.getBytes());System.out.println("【WQ】 send msg = "+ msg);Thread.sleep(i*5);}// 关闭资源
channel.close();
connection.close();}}
- 消息消费者:Recv1
importcom.goudong.modules.rabbitmq.demo.util.ConnectionUtil;importcom.rabbitmq.client.*;importjava.io.IOException;importjava.util.concurrent.TimeoutException;/**
* 类描述:
* 工作队列,公平分发,消息消费者1号
* @author cfl
* @version 1.0
* @date 2022/10/10 14:14
*/publicclassRecv1{publicstaticfinalStringQUEUE_NAME="test_fair_dispatch_work_queue";publicstaticvoidmain(String[] args)throwsIOException,TimeoutException{// 获取连接Connection connection =ConnectionUtil.getConnection();// 获取channelChannel channel = connection.createChannel();// 声明队列
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
channel.basicQos(1);// 定义一个消费者Consumer consumer =newDefaultConsumer(channel){// 消息到达,触发这个方法@OverridepublicvoidhandleDelivery(String consumerTag,Envelope envelope,AMQP.BasicProperties properties,byte[] body)throwsIOException{String msg =newString(body,"utf-8");System.out.println("Recv [1] msg = "+ msg);try{Thread.sleep(2000);}catch(InterruptedException e){
e.printStackTrace();}finally{System.out.println("Recv [1] done!");// 手动回执 false 表示只确认 envelope.DelivertTag 这条消息,true 表示确认 小于等于 b.DelivertTag 的所有消息(批量确认)
channel.basicAck(envelope.getDeliveryTag(),false);}}};// 监听队列// boolean autoAck = true; //自动应答boolean autoAck =false;//手动应答
channel.basicConsume(QUEUE_NAME, autoAck, consumer);}}
- 消息消费者:Recv2
importcom.goudong.modules.rabbitmq.demo.util.ConnectionUtil;importcom.rabbitmq.client.*;importjava.io.IOException;importjava.util.concurrent.TimeoutException;/**
* 类描述:
* 工作队列,公平分发,消息消费者2号
* @author cfl
* @version 1.0
* @date 2022/10/10 14:14
*/publicclassRecv2{publicstaticfinalStringQUEUE_NAME="test_fair_dispatch_work_queue";publicstaticvoidmain(String[] args)throwsIOException,TimeoutException{// 获取连接Connection connection =ConnectionUtil.getConnection();// 获取channelChannel channel = connection.createChannel();// 声明队列
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
channel.basicQos(1);// 定义一个消费者DefaultConsumer defaultConsumer =newDefaultConsumer(channel){// 消息到达,触发这个方法@OverridepublicvoidhandleDelivery(String consumerTag,Envelope envelope,AMQP.BasicProperties properties,byte[] body)throwsIOException{String msg =newString(body,"utf-8");System.out.println("Recv [2] msg = "+ msg);try{Thread.sleep(1000);}catch(InterruptedException e){
e.printStackTrace();}finally{System.out.println("Recv [2] done!");// 手动回执 false 表示只确认 envelope.DelivertTag 这条消息,true 表示确认 小于等于 b.DelivertTag 的所有消息(批量确认)
channel.basicAck(envelope.getDeliveryTag(),false);}}};// 监听队列boolean autoAck =false;//false 手动回执
channel.basicConsume(QUEUE_NAME, autoAck, defaultConsumer);}}
现象:消费者2 处理的消息比消费者1多,能者多劳
publish/subscribe 发布-订阅模式
- 一个生产者,多个消费者,需要新建fanout交换机
- 每个消费者都有自己的队列,并绑定到交换机上
- 生产者没有直接把消息发送到队列,而是发送到交换机
- 消息发送时需要指定交换机,消息接收时需要指定队列
- 生产者发送的消息,经过交换机,到达队列。就能实现一个消息被多个消费者消费
注册成功时,既要发邮件,又要发短信
示例
- 消息生产者:Send
importcom.goudong.modules.rabbitmq.demo.util.ConnectionUtil;importcom.rabbitmq.client.Channel;importcom.rabbitmq.client.Connection;importjava.io.IOException;importjava.util.concurrent.TimeoutException;/**
* 类描述:
* 发布订阅模式队列,消息生产者
* @author cfl
* @version 1.0
* @date 2022/10/10 14:51
*/publicclassSend{publicstaticfinalStringEXCHANGE_NAME="test_exchange_fanout";publicstaticvoidmain(String[] args)throwsIOException,TimeoutException{Connection connection =ConnectionUtil.getConnection();Channel channel = connection.createChannel();// 声明交换机
channel.exchangeDeclare(EXCHANGE_NAME,"fanout");//分发// 发送消息String msg ="hello ps";
channel.basicPublish(EXCHANGE_NAME,"",null, msg.getBytes());System.out.println("Send msg = "+ msg);
channel.close();
connection.close();}}
消息哪去了?? 丢失了,因为交换机没有存储的能力,在rabbitmq里面只有队列有存储的能力。因为还没有队列绑定到这个交换机,所以数据丢失了。
- 消息消费者:Recv1
importcom.goudong.modules.rabbitmq.demo.util.ConnectionUtil;importcom.rabbitmq.client.*;importjava.io.IOException;importjava.util.concurrent.TimeoutException;/**
* 类描述:
* 发布订阅模式队列,消息消费者1号
* @author cfl
* @version 1.0
* @date 2022/10/10 14:59
*/publicclassRecv1{publicstaticfinalStringQUEUE_NAME="test_queue_fanout_email";publicstaticfinalStringEXCHANGE_NAME="test_exchange_fanout";publicstaticvoidmain(String[] args)throwsIOException,TimeoutException{// 获取连接Connection connection =ConnectionUtil.getConnection();// 获取channelChannel channel = connection.createChannel();// 声明队列
channel.queueDeclare(QUEUE_NAME,false,false,false,null);// 保证一次只分发一个
channel.basicQos(1);// 绑定到交换机 转发器
channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,"");// 定义一个消费者Consumer consumer =newDefaultConsumer(channel){// 消息到达,触发这个方法@OverridepublicvoidhandleDelivery(String consumerTag,Envelope envelope,AMQP.BasicProperties properties,byte[] body)throwsIOException{String msg =newString(body,"utf-8");System.out.println("Recv [1] msg = "+ msg);try{Thread.sleep(2000);}catch(InterruptedException e){
e.printStackTrace();}finally{System.out.println("Recv [1] done!");// 手动回执 false 表示只确认 envelope.DelivertTag 这条消息,true 表示确认 小于等于 b.DelivertTag 的所有消息(批量确认)
channel.basicAck(envelope.getDeliveryTag(),false);}}};// 监听队列boolean autoAck =false;
channel.basicConsume(QUEUE_NAME, autoAck, consumer);}}
- 消息消费者:Recv2
importjava.io.IOException;importjava.util.concurrent.TimeoutException;/**
* 类描述:
* 发布订阅模式队列,消息消费者1号
* @author cfl
* @version 1.0
* @date 2022/10/10 14:59
*/publicclassRecv2{publicstaticfinalStringQUEUE_NAME="test_queue_fanout_sms";publicstaticfinalStringEXCHANGE_NAME="test_exchange_fanout";publicstaticvoidmain(String[] args)throwsIOException,TimeoutException{// 获取连接Connection connection =ConnectionUtil.getConnection();// 获取channelChannel channel = connection.createChannel();// 声明队列
channel.queueDeclare(QUEUE_NAME,false,false,false,null);// 绑定到交换机 转发器
channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,"");// 保证一次只分发一个
channel.basicQos(1);// 定义一个消费者Consumer consumer =newDefaultConsumer(channel){// 消息到达,触发这个方法@OverridepublicvoidhandleDelivery(String consumerTag,Envelope envelope,AMQP.BasicProperties properties,byte[] body)throwsIOException{String msg =newString(body,"utf-8");System.out.println("Recv [2] msg = "+ msg);try{Thread.sleep(2000);}catch(InterruptedException e){
e.printStackTrace();}finally{System.out.println("Recv [2] done!");// 手动回执 false 表示只确认 envelope.DelivertTag 这条消息,true 表示确认 小于等于 b.DelivertTag 的所有消息(批量确认)
channel.basicAck(envelope.getDeliveryTag(),false);}}};// 监听队列boolean autoAck =false;
channel.basicConsume(QUEUE_NAME, autoAck, consumer);}}
现象:消费者1和消费者2都受到了消息。
routing 路由选择通配符模式
- direct交换机类型
- 生产者需要将交换机和routing key绑定
- 消费者需要将队列,交换机,routing key 三者绑定
- 每个消息会根据不同的Routing key,发送到不同的消费者队列
- 不支持通配符(
*
,#
)
示例
- 消息生产者:Send
importcom.goudong.modules.rabbitmq.demo.util.ConnectionUtil;importcom.rabbitmq.client.Channel;importcom.rabbitmq.client.Connection;importjava.io.IOException;importjava.util.concurrent.TimeoutException;/**
* 类描述:
* 路由模式队列,消息生产者
* @author cfl
* @version 1.0
* @date 2022/10/10 15:12
*/publicclassSend{publicstaticfinalStringEXCHANGE_NAME="test_exchange_direct";publicstaticvoidmain(String[] args)throwsIOException,TimeoutException{Connection connection =ConnectionUtil.getConnection();Channel channel = connection.createChannel();// exchange direct:直连
channel.exchangeDeclare(EXCHANGE_NAME,"direct");String msg ="hello direct !";// routing keyString routingKey ="info";
channel.basicPublish(EXCHANGE_NAME, routingKey,null, msg.getBytes());System.out.println("send :"+ msg);
channel.close();
connection.close();}}
- 消息消费者:Recv1
importcom.goudong.modules.rabbitmq.demo.util.ConnectionUtil;importcom.rabbitmq.client.*;importjava.io.IOException;importjava.util.concurrent.TimeoutException;/**
* 类描述:
* 路由模式队列,消息消费者1号
* @author cfl
* @version 1.0
* @date 2022/10/10 15:13
*/publicclassRecv1{publicstaticfinalStringEXCHANGE_NAME="test_exchange_direct";publicstaticfinalStringQUEUE_NAME="test_queue_direct_1";publicstaticvoidmain(String[] args)throwsIOException,TimeoutException{Connection connection =ConnectionUtil.getConnection();Channel channel = connection.createChannel();// 声明队列
channel.queueDeclare(QUEUE_NAME,false,false,false,null);// 绑定队列到交换机,并绑定 routingKey
channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,"error");// 保证一次只分发一个
channel.basicQos(1);// 定义一个消费者Consumer consumer =newDefaultConsumer(channel){// 消息到达,触发这个方法@OverridepublicvoidhandleDelivery(String consumerTag,Envelope envelope,AMQP.BasicProperties properties,byte[] body)throwsIOException{String msg =newString(body,"utf-8");System.out.println("Recv [1] msg = "+ msg);try{Thread.sleep(1000);}catch(InterruptedException e){
e.printStackTrace();}finally{// 手动回执 false 表示只确认 envelope.DelivertTag 这条消息,true 表示确认 小于等于 b.DelivertTag 的所有消息(批量确认)
channel.basicAck(envelope.getDeliveryTag(),false);System.out.println("Recv [1] done!");}}};// 监听队列 autoAck(消息应答):false 手动回执 (消息回执 channel.basicAck(envelope.getDeliveryTag(), false);)
channel.basicConsume(QUEUE_NAME,false, consumer);}}
- 消息消费者:Recv2
importcom.goudong.modules.rabbitmq.demo.util.ConnectionUtil;importcom.rabbitmq.client.*;importjava.io.IOException;importjava.util.concurrent.TimeoutException;/**
* 类描述:
* 路由模式队列,消息消费者2号
* @author cfl
* @version 1.0
* @date 2022/10/10 15:13
*/publicclassRecv2{publicstaticfinalStringEXCHANGE_NAME="test_exchange_direct";publicstaticfinalStringQUEUE_NAME="test_queue_direct_2";publicstaticvoidmain(String[] args)throwsIOException,TimeoutException{Connection connection =ConnectionUtil.getConnection();Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,"error");
channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,"info");
channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,"waring");
channel.basicQos(1);Consumer consumer =newDefaultConsumer(channel){@OverridepublicvoidhandleDelivery(String consumerTag,Envelope envelope,AMQP.BasicProperties properties,byte[] body)throwsIOException{String msg =newString(body,"utf-8");System.out.println("Recv [2] msg = "+ msg);try{Thread.sleep(1000);}catch(InterruptedException e){
e.printStackTrace();}finally{// 手动回执 false 表示只确认 envelope.DelivertTag 这条消息,true 表示确认 小于等于 b.DelivertTag 的所有消息(批量确认)
channel.basicAck(envelope.getDeliveryTag(),false);System.out.println("Recv [2] done!");}}};
channel.basicConsume(QUEUE_NAME,false, consumer);}}
现象:队列绑定的路由key和消息发送时指定的路由key匹配时,才会接收到消息。
Topics 主题
- Topic交换机类型,生产者需要申明topic交换机,并指定routing key。
- 和路由模式类似,但是Topic可以支持通配符,
#
匹配一个或者多个字符;*
匹配一个字符
商品:发布、删除、修改、查询
- 消息生产者:Send
importcom.goudong.modules.rabbitmq.demo.util.ConnectionUtil;importcom.rabbitmq.client.Channel;importcom.rabbitmq.client.Connection;importjava.io.IOException;importjava.util.concurrent.TimeoutException;/**
* 类描述:
* 主题队列,消息生产者
* @author cfl
* @version 1.0
* @date 2022/10/10 15:21
*/publicclassSend{publicstaticfinalStringEXCHANGE_NAME="test_exchange_topic";publicstaticvoidmain(String[] args)throwsIOException,TimeoutException{Connection connection =ConnectionUtil.getConnection();Channel channel = connection.createChannel();// 声明交换机 topic:主题模式
channel.exchangeDeclare(EXCHANGE_NAME,"topic");String message ="商品...";// goods.delete 只有消费者2号能收到(goods.#)
channel.basicPublish(EXCHANGE_NAME,"goods.delete",null, message.getBytes());// 两个消费者都能收到// channel.basicPublish(EXCHANGE_NAME, "goods.add", null, message.getBytes());System.out.println("send message = "+ message);
channel.close();
connection.close();}}
- 消息消费者:Recv1
importcom.goudong.modules.rabbitmq.demo.util.ConnectionUtil;importcom.rabbitmq.client.*;importjava.io.IOException;importjava.util.concurrent.TimeoutException;/**
* 类描述:
* 主题队列,消息消费者1号
* @author cfl
* @version 1.0
* @date 2022/10/10 15:21
*/publicclassRecv1{publicstaticfinalStringEXCHANGE_NAME="test_exchange_topic";publicstaticfinalStringQUEUE_NAME="test_queue_topic_1";publicstaticvoidmain(String[] args)throwsIOException,TimeoutException{Connection connection =ConnectionUtil.getConnection();Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME,false,false,false,null);//绑定 商品新增 goods.add
channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,"goods.add");
channel.basicQos(1);//定义消费者Consumer consumer =newDefaultConsumer(channel){@OverridepublicvoidhandleDelivery(String consumerTag,Envelope envelope,AMQP.BasicProperties properties,byte[] body)throwsIOException{String msg =newString(body,"utf-8");System.out.println("[1] recv msg: "+ msg);try{Thread.sleep(1000);}catch(InterruptedException e){
e.printStackTrace();}finally{System.out.println("[1] recv done!");// 手动回执 false 表示只确认 envelope.DelivertTag 这条消息,true 表示确认 小于等于 b.DelivertTag 的所有消息(批量确认)
channel.basicAck(envelope.getDeliveryTag(),false);}}};// 监听队列
channel.basicConsume(QUEUE_NAME,false, consumer);}}
- 消息消费者:Recv2
importcom.goudong.modules.rabbitmq.demo.util.ConnectionUtil;importcom.rabbitmq.client.*;importjava.io.IOException;importjava.util.concurrent.TimeoutException;/**
* 类描述:
* 主题队列,消息消费者2号
* @author cfl
* @version 1.0
* @date 2022/10/10 15:21
*/publicclassRecv2{publicstaticfinalStringEXCHANGE_NAME="test_exchange_topic";publicstaticfinalStringQUEUE_NAME="test_queue_topic_2";publicstaticvoidmain(String[] args)throwsIOException,TimeoutException{Connection connection =ConnectionUtil.getConnection();Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME,false,false,false,null);//绑定 goods.# (`#` 匹配一个或者多个字符)
channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,"goods.#");
channel.basicQos(1);//定义消费者Consumer consumer =newDefaultConsumer(channel){@OverridepublicvoidhandleDelivery(String consumerTag,Envelope envelope,AMQP.BasicProperties properties,byte[] body)throwsIOException{String msg =newString(body,"utf-8");System.out.println("[2] recv msg: "+ msg);try{Thread.sleep(1000);}catch(InterruptedException e){
e.printStackTrace();}finally{System.out.println("[2] recv done!");// 手动回执 false 表示只确认 envelope.DelivertTag 这条消息,true 表示确认 小于等于 b.DelivertTag 的所有消息(批量确认)
channel.basicAck(envelope.getDeliveryTag(),false);}}};// 监听队列
channel.basicConsume(QUEUE_NAME,false, consumer);}}
现象:只有满足生产者指定的路由模式,才会将消息发送到队列。
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