import com.rabbitmq.client.*;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
/**
* 使用 channel.exchangeDeclare 声明一个备份交换器
* @author hxstrive.com 2022/2/22
*/
public class ExchangeAe1 {
public static void main(String[] args) throws Exception {
ExchangeAe1 demo = new ExchangeAe1();
demo.consumer();
demo.consumer2();
demo.sender();
}
/**
* 生产者
* @throws Exception
*/
private void sender() throws Exception {
// 创建连接工厂
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("127.0.0.1");
factory.setPort(5672);
// 创建连接
Connection connection = factory.newConnection();
// 创建信道
Channel channel = connection.createChannel();
// 声明交换器
// 下面交换器用作备份交换器，该交换器的所有消息均路由到 unroutedQueue 队列
channel.exchangeDeclare("myAe","fanout",
true , false, null) ;
channel.queueDeclare("unroutedQueue", true,
false , false, null);
channel.queueBind("unroutedQueue","myAe","");
// 下面交换器通过 alternate-exchange 参数设置一个备份交换器
// 将交换器 myAe 设置为 normalExchange 的交换器
Map<String, Object> exchangeArgs = new HashMap<String, Object>();
exchangeArgs.put("alternate-exchange", "myAe");
channel.exchangeDeclare("normalExchange","direct",
true, false, exchangeArgs);
channel.queueDeclare("normalQueue", true,
false , false , null);
channel.queueBind("normalQueue", "normalExchange", "normalKey");
// 发送消息
System.out.println("[Sender] 开始发送消息...");
// 该消息将路由给 normalQueue 队列
channel.basicPublish("normalExchange", "normalKey",
null, "hello message1".getBytes());
System.out.println("[Sender] 发送消息 “hello message1”");
// 该消息不能匹配任何队列，将发往备份交换器
channel.basicPublish("normalExchange", "www.hxstrive.com",
null, "hello message2".getBytes());
System.out.println("[Sender] 发送消息 “hello message2”");
// 关闭连接
channel.close();
connection.close();
}
/**
* 消费者
* @throws Exception
*/
private void consumer() throws Exception {
// 创建连接工厂
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("127.0.0.1");
factory.setPort(5672);
// 创建连接
Connection connection = factory.newConnection();
// 创建信道
Channel channel = connection.createChannel();
// 声明队列
channel.queueDeclare("normalQueue", true,
false , false , null);
// 消费消息
System.out.println("[Consumer] 开始消费消息...");
channel.basicConsume("normalQueue", true, new DefaultConsumer(channel){
@Override
public void handleDelivery(String consumerTag, Envelope envelope,
AMQP.BasicProperties properties, byte[] body) throws IOException {
System.out.println("[Consumer] body = " + new String(body));
}
});
}
/**
* 消费者
* @throws Exception
*/
private void consumer2() throws Exception {
// 创建连接工厂
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("127.0.0.1");
factory.setPort(5672);
// 创建连接
Connection connection = factory.newConnection();
// 创建信道
Channel channel = connection.createChannel();
// 声明队列
channel.queueDeclare("unroutedQueue", true,
false , false , null);
// 消费消息
System.out.println("[Consumer2] 开始消费消息...");
channel.basicConsume("unroutedQueue", true, new DefaultConsumer(channel){
@Override
public void handleDelivery(String consumerTag, Envelope envelope,
AMQP.BasicProperties properties, byte[] body) throws IOException {
System.out.println("[Consumer2] body = " + new String(body));
}
});
}
}
