RabbitMQ消息生产与消费

对象	作用
ConnectionFactory	获取连接工厂
Connection	一个连接
Channel	数据通信信道，可发送和接收消息
Queue	具体的消息存储队列
Producer & Consumer	生产者和消费者

Maven 依赖

<dependency>
			<groupId>com.rabbitmq</groupId>
			<artifactId>amqp-client</artifactId>
			<version>3.6.5</version>
</dependency>

Provider

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;

public class Procuder {
	public static void main(String[] args) throws Exception {
		//1 创建一个ConnectionFactory, 并进行配置
		ConnectionFactory connectionFactory = new ConnectionFactory();
		connectionFactory.setHost("192.168.11.76");
		connectionFactory.setPort(5672);
		connectionFactory.setVirtualHost("/");
		
		//2 通过连接工厂创建连接
		Connection connection = connectionFactory.newConnection();
		
		//3 通过connection创建一个Channel
		Channel channel = connection.createChannel();
		
		//4 通过Channel发送数据
		for(int i=0; i < 5; i++){
			String msg = "Hello RabbitMQ!";
			//1 exchange   2 routingKey
			channel.basicPublish("", "test001", null, msg.getBytes());
		}

		//5 记得要关闭相关的连接
		channel.close();
		connection.close();
	}
}

channel.basicPublish()

queue：队列的名称，字符串即可
durable：是否持久化
exclusive：是否独占，就是说这个队列只有我这一个 channel 可以监听，可以保证顺序消费
autoDelete：队列与 Exchange 脱离，就会自动删除
arguments：扩展参数，null 就好

Customer

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.Envelope;
import com.rabbitmq.client.QueueingConsumer;
import com.rabbitmq.client.QueueingConsumer.Delivery;

public class Consumer {

	public static void main(String[] args) throws Exception {
		
		//1 创建一个ConnectionFactory, 并进行配置
		ConnectionFactory connectionFactory = new ConnectionFactory();
		connectionFactory.setHost("192.168.11.76");
		connectionFactory.setPort(5672);
		connectionFactory.setVirtualHost("/");
		
		//2 通过连接工厂创建连接
		Connection connection = connectionFactory.newConnection();
		
		//3 通过connection创建一个Channel
		Channel channel = connection.createChannel();
		
		//4 声明（创建）一个队列
		String queueName = "test001";
		channel.queueDeclare(queueName, true, false, false, null);
		
		//5 创建消费者
		QueueingConsumer queueingConsumer = new QueueingConsumer(channel);
		
		//6 设置Channel
		channel.basicConsume(queueName, true, queueingConsumer);
		
		while(true){
			//7 获取消息
			Delivery delivery = queueingConsumer.nextDelivery();
			String msg = new String(delivery.getBody());
			System.err.println("消费端: " + msg);
			//Envelope envelope = delivery.getEnvelope();
		}
		
	}
}

channel.basicConsume()

queue，队列名称
autoAck，是否自动签收，返回 ack，保证高可用的时候
callback：具体的操作对象