import com.rabbitmq.client.*;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
/**
* 验证优先级队列
* @author hxstrive.com 2022/2/24
*/
public class PriorityQueueDemo {
/** 交换器名称 */
private final String EXCHANGE_NAME = "exchange-" + PriorityQueueDemo.class.getSimpleName();
/** 队列名称 */
private final String QUEUE_NAME = "queue-" + PriorityQueueDemo.class.getSimpleName();
public static void main(String[] args) throws Exception {
PriorityQueueDemo demo = new PriorityQueueDemo();
demo.sender();
}
/**
* 生产者
* @throws Exception
*/
private void sender() throws Exception {
// 创建连接
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("127.0.0.1");
factory.setPort(5672);
Connection connection = factory.newConnection();
// 创建信道
Channel channel = connection.createChannel();
// 声明交换器
channel.exchangeDeclare(EXCHANGE_NAME, "topic");
// 声明队列
Map<String,Object> argss =new HashMap<String,Object>() ;
// 设置队列的优先级为10
argss.put("x-max-priority", 10);
channel.queueDeclare(QUEUE_NAME, true, false, true, argss) ;
channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "*.hxstrive.com");
// 发送消息
System.out.println("[Sender] Send Message...");
for(int i = 0; i < 5; i++) {
// 为每个消息设置随机优先级，优先级位于 0~10
int priority = (int)(Math.random()*11);
String message = "Priority Message priority=" + priority;
// 设置消息的优先级
AMQP.BasicProperties msgProps = new AMQP.BasicProperties.Builder()
.priority(priority).build();
channel.basicPublish(EXCHANGE_NAME, "www.hxstrive.com",
msgProps, message.getBytes());
System.out.println("[Sender] message = " + message);
}
// 启动消费者
consumer();
// 释放资源
channel.close();
connection.close();
}
/**
* 消费者
* @throws Exception
*/
private void consumer() throws Exception {
// 创建连接
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("127.0.0.1");
factory.setPort(5672);
Connection connection = factory.newConnection();
// 创建信道
final Channel channel = connection.createChannel();
// 声明交换器
channel.exchangeDeclare(EXCHANGE_NAME, "topic");
// 声明队列
Map<String,Object> argss =new HashMap<String,Object>() ;
// 设置队列的优先级为10
argss.put("x-max-priority", 10);
channel.queueDeclare(QUEUE_NAME, true, false, true, argss) ;
channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "*.hxstrive.com");
// 消费消息
System.out.println("[Consumer] Waiting Message...");
channel.basicConsume(QUEUE_NAME, false, new DefaultConsumer(channel){
@Override
public void handleDelivery(String consumerTag, Envelope envelope,
AMQP.BasicProperties properties, byte[] body) throws IOException {
try {
// 模拟费时超过
System.out.println("[Consumer] message = " + new String(body));
Thread.sleep(1000);
// 手动发送ACK确认消息
channel.basicAck(envelope.getDeliveryTag(), false);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
}
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