模式说明:
- 队列与交换机的绑定,不能是任意绑定了,而是要指定一个RoutingKey(路由key)
- 消息的发送方在向Exchange发送消息时,也必须指定消息的RoutingKey
- Exchange不再把消息交给每一个绑定的队列,而是根据消息的RoutingKey进行判断,只有队列的Routingkey与消息的Routingkey完全一致,才会接收到消息
生产者示例代码
package com.rabbitmq.producer;
import com.rabbitmq.client.BuiltinExchangeType;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
/**
* 发送消息
*/
public class Producer_Routing {
public static void main(String[] args) throws IOException, TimeoutException {
//1.创建连接工厂
ConnectionFactory factory = new ConnectionFactory();
//2. 设置参数
factory.setHost("172.16.98.133");//ip 默认值 localhost
factory.setPort(5672); //端口 默认值 5672
factory.setVirtualHost("/bgt");//虚拟机 默认值/
factory.setUsername("testuser");//用户名 默认 guest
factory.setPassword("111111");//密码 默认值 guest
//3. 创建连接 Connection
Connection connection = factory.newConnection();
//4. 创建Channel
Channel channel = connection.createChannel();
/*
exchangeDeclare(String exchange, BuiltinExchangeType type, boolean durable, boolean autoDelete, boolean internal, Map<String, Object> arguments)
参数:
1. exchange:交换机名称
2. type:交换机类型
DIRECT("direct"),:定向
FANOUT("fanout"),:扇形(广播),发送消息到每一个与之绑定队列。
TOPIC("topic"),通配符的方式
HEADERS("headers");参数匹配
3. durable:是否持久化
4. autoDelete:自动删除
5. internal:内部使用。 一般false
6. arguments:参数
*/
String exchangeName = "test_direct";
//5. 创建交换机
channel.exchangeDeclare(exchangeName, BuiltinExchangeType.DIRECT,true,false,false,null);
//6. 创建队列
String queue1Name = "test_direct_queue1";
String queue2Name = "test_direct_queue2";
channel.queueDeclare(queue1Name,true,false,false,null);
channel.queueDeclare(queue2Name,true,false,false,null);
//7. 绑定队列和交换机
/*
queueBind(String queue, String exchange, String routingKey)
参数:
1. queue:队列名称
2. exchange:交换机名称
3. routingKey:路由键,绑定规则
如果交换机的类型为fanout ,routingKey设置为""
*/
//队列1绑定 error
channel.queueBind(queue1Name,exchangeName,"error");
//队列2绑定 info error warning
channel.queueBind(queue2Name,exchangeName,"info");
channel.queueBind(queue2Name,exchangeName,"error");
channel.queueBind(queue2Name,exchangeName,"warning");
String body = "日志信息:张三调用了delete方法...出错误了。。。日志级别:error...";
//8. 发送消息
channel.basicPublish(exchangeName,"error",null,body.getBytes());
//9. 释放资源
channel.close();
connection.close();
}
}
消费者示例代码
消费者监听队列queue2Name,因此能接收到消息.
package com.rabbitmq.consumer;
import com.rabbitmq.client.*;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
public class Consumer_Routing1 {
public static void main(String[] args) throws IOException, TimeoutException {
//1.创建连接工厂
ConnectionFactory factory = new ConnectionFactory();
//2. 设置参数
factory.setHost("172.16.98.133");//ip 默认值 localhost
factory.setPort(5672); //端口 默认值 5672
factory.setVirtualHost("/bgt");//虚拟机 默认值/
factory.setUsername("testuser");//用户名 默认 guest
factory.setPassword("111111");//密码 默认值 guest
//3. 创建连接 Connection
Connection connection = factory.newConnection();
//4. 创建Channel
Channel channel = connection.createChannel();
String queue1Name = "test_direct_queue1";
String queue2Name = "test_direct_queue2";
/*
basicConsume(String queue, boolean autoAck, Consumer callback)
参数:
1. queue:队列名称
2. autoAck:是否自动确认
3. callback:回调对象
*/
// 接收消息
Consumer consumer = new DefaultConsumer(channel){
/*
回调方法,当收到消息后,会自动执行该方法
1. consumerTag:标识
2. envelope:获取一些信息,交换机,路由key...
3. properties:配置信息
4. body:数据
*/
@Override
public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
System.out.println("body:"+new String(body));
System.out.println("将日志信息打印到控制台.....");
}
};
//监听队列2
channel.basicConsume(queue2Name,true,consumer);
}
}