Topic消费模型
java
复制代码
* 通配符模型
* 生产者必须指定完整且准确的路由key
* 消费者可以使用通配符
* *：可以替代一级的任意字符 add.* ==> add.user add.goods
* #：可以替代多级的任意字符 add.# ==> add.user.name add.user.name.firstName
生产者
java
复制代码
package com.example.demo02.mq.topic;
import com.example.demo02.mq.util.ConnectionUtils;
import com.rabbitmq.client.BuiltinExchangeType;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import java.io.IOException;
/**
* @author Allen
* 4/11/2024 10:15 AM
* @version 1.0
* @description: 通配符模型发送者
* 通配符模型
* 生产者必须指定完整且准确的路由key
* 消费者可以使用通配符
* *：可以替代一级的任意字符 add.* ==> add.user add.goods
* #：可以替代多级的任意字符 add.# ==> add.user.name add.user.name.firstName
*/
public class TopicSender {
public static void main(String[] args) throws Exception {
// 1：获取连接
Connection connection = ConnectionUtils.getConnection();
// 2：创建通道
Channel channel = connection.createChannel();
// 3：声明交换机
channel.exchangeDeclare("topic.exchange", BuiltinExchangeType.TOPIC,false);
// 4：发送消息 路由Key写法 goods.add 不要使用通配符
String msg1 = "商品新增了，Topic模型，routing key 为 goods.add";
String msg2 = "商品修改了，Topic模型，routing key 为 goods.update";
String msg3 = "商品删除了，Topic模型，routing key 为 goods.delete";
String msg4 = "用户新增了，Topic模型，routing key 为 user.add";
String msg5 = "用户修改了，Topic模型，routing key 为 user.update";
String msg6 = "用户删除了，Topic模型，routing key 为 user.delete";
String msg7 = "添加了用户名字，Topic模型，routing key 为 user.add.name";
String msg8 = "添加了用户年龄，Topic模型，routing key 为 user.add.age";
String msg9 = "修改了用户名字，Topic模型，routing key 为 user.update.name";
String msg10 = "修改了用户年龄，Topic模型，routing key 为 user.update.age";
channel.basicPublish("topic.exchange","goods.add",null,msg1.getBytes());
channel.basicPublish("topic.exchange","goods.update",null,msg2.getBytes());
channel.basicPublish("topic.exchange","goods.delete",null,msg3.getBytes());
channel.basicPublish("topic.exchange","user.add",null,msg4.getBytes());
channel.basicPublish("topic.exchange","user.update",null,msg5.getBytes());
channel.basicPublish("topic.exchange","user.delete",null,msg6.getBytes());
channel.basicPublish("topic.exchange","user.add.name",null,msg7.getBytes());
channel.basicPublish("topic.exchange","user.add.age",null,msg8.getBytes());
channel.basicPublish("topic.exchange","user.update.name",null,msg9.getBytes());
channel.basicPublish("topic.exchange","user.update.age",null,msg10.getBytes());
// 5：关闭连接
channel.close();
connection.close();
}
}
消费者1
java
复制代码
package com.example.demo02.mq.topic;
import com.example.demo02.mq.util.ConnectionUtils;
import com.rabbitmq.client.*;
import java.io.IOException;
/**
* @author Allen
* 4/11/2024 10:22 AM
* @version 1.0
*
* @description: 通配符模型接收者1
*/
public class TopicReceiver1 {
public static void main(String[] args) throws Exception {
// 1：获取连接
Connection connection = ConnectionUtils.getConnection();
// 2：创建通道
Channel channel = connection.createChannel();
// 3：声明交换机
channel.exchangeDeclare("topic.exchange", BuiltinExchangeType.TOPIC,false);
// 4：声明队列
channel.queueDeclare("topic.queue1", false, false, false, null);
// 5：绑定队列到交换机 使用通配符* 一级任意字符 # 多级任意字符
channel.queueBind("topic.queue1", "topic.exchange", "goods.*");
// 6：消费消息
Consumer consumer = new DefaultConsumer(channel){
@Override
public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
System.out.println("商品模块接收到的消息是：" + new String(body));
channel.basicAck(envelope.getDeliveryTag(),false);
}
};
channel.basicConsume("topic.queue1",false,consumer);
}
}
消费者2
java
复制代码
package com.example.demo02.mq.topic;
import com.example.demo02.mq.util.ConnectionUtils;
import com.rabbitmq.client.*;
import java.io.IOException;
/**
* @author Allen
* 4/11/2024 10:22 AM
* @version 1.0
*
* @description: 通配符模型接收者2
*/
public class TopicReceiver2 {
public static void main(String[] args) throws Exception {
// 1：获取连接
Connection connection = ConnectionUtils.getConnection();
// 2：创建通道
Channel channel = connection.createChannel();
// 3：声明交换机
channel.exchangeDeclare("topic.exchange", BuiltinExchangeType.TOPIC,false);
// 4：声明队列
channel.queueDeclare("topic.queue2", false, false, false, null);
// 5：绑定队列到交换机 使用通配符 user.* user.#
channel.queueBind("topic.queue2", "topic.exchange", "user.#");
// 6：消费消息
Consumer consumer = new DefaultConsumer(channel){
@Override
public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
System.out.println("用户模块接收到的消息是：" + new String(body));
channel.basicAck(envelope.getDeliveryTag(),false);
}
};
channel.basicConsume("topic.queue2",false,consumer);
}
}
结果
