Routing路由模式
- 需要设置类型为direct的交换机,交换机和队列进行绑定,并且指定routing key,当发送消息到交换机后,交换机会根据routing key将消息发送到对应的队列
- 应用场景:在不同策略下,使用不同的消费者去使用该模式。
- 代码层面:交换机与队列绑定时,必须指定routing key;在发送消息时,也必须给对应的消息指定routing key。
![image](https://img2020.cnblogs.com/blog/2254188/202111/2254188-20211111151029545-114030942.png)
- 生产者代码:
public class Producer {
public static void main(String[] args) throws Exception {
Connection connection = ConnectionUtil.getConnection();
Channel channel = connection.createChannel();
String exchangeName = "test_direct";
// 创建交换机
channel.exchangeDeclare(exchangeName,BuiltinExchangeType.DIRECT,true,false,false,null);
// 创建队列
String queue1Name = "test_direct_queue1";
String queue2Name = "test_direct_queue2";
// 声明(创建)队列
channel.queueDeclare(queue1Name,true,false,false,null);
channel.queueDeclare(queue2Name,true,false,false,null);
// 队列绑定交换机
// 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 message = "日志信息:张三调用了delete方法.错误了,日志级别warning";
// 发送消息
/**
* 参数1:交换机名称
* 参数2:路由key,简单模式可以传递队列名称
* 参数3:配置信息
* 参数4:消息内容
*/
channel.basicPublish(exchangeName,"warning",null,message.getBytes());
System.out.println(message);
channel.close();
connection.close();
}
}
public class Consumer1 {
public static void main(String[] args) throws Exception {
Connection connection = ConnectionUtil.getConnection();
Channel channel = connection.createChannel();
String queue1Name = "test_direct_queue1";
Consumer consumer = new DefaultConsumer(channel){
@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.....");
}
};
channel.basicConsume(queue1Name,true,consumer);
}
}
public class Consumer2 {
public static void main(String[] args) throws Exception {
Connection connection = ConnectionUtil.getConnection();
Channel channel = connection.createChannel();
String queue2Name = "test_direct_queue2";
Consumer consumer = new DefaultConsumer(channel){
@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.....");
}
};
channel.basicConsume(queue2Name,true,consumer);
}
}