0.Binding-綁定
Exchange和Exchange、Queue之間的連接關係。
1.Queue-消息隊列
消息隊列,實際存儲消息數據。
Durability:是否持久化,Durable:是,Transient:否
Auto delete:如選yes,代表當最後一個監聽被移除之後,該Queue會被自動刪除
2.Message-消息
服務器和應用之間傳送的消息
本質上就是一段數據,由Properties和Payload(Body)組成
常用屬性:delivery mode、headers(自定義屬性)
其他屬性:content_type、content_ encoding、priority
correlation_id、replay_to、message_id
timestamp、type、user_id、app_id、cluster_id
3.Virtual host-虛擬機
虛擬地址,用於進行邏輯隔離,最上層的消息路由
一個Virtual host裏面可以有若干個Exchange和Queue
同一個Virtual host裏面不能有系統名稱的Exchange和Queue
4.關於消息的demo
獲取連接相關的代碼和之前demo一樣
4.1 生產者代碼
package com.star.movie.message;
import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.star.movie.common.Constant;
import java.util.HashMap;
import java.util.Map;
/**
* @Description:Procuder
* @author:kaili
* @Date: 2019-04-21 23:05
**/
public class MessageProducer {
public static void main(String[] args) throws Exception {
//2 通過連接工廠創建連接
Connection connection = Constant.getConnection();
//3 通過connection創建一個Channel
Channel channel = connection.createChannel();
Map<String, Object> headers = new HashMap<>();
headers.put("my1", "111");
headers.put("my2", "222");
AMQP.BasicProperties properties = new AMQP.BasicProperties.Builder()
.deliveryMode(2)
.contentEncoding("UTF-8")
.expiration("50000")
.headers(headers)
.build();
//4 通過Channel發送數據
for(int i=0; i < 5; i++){
String msg = "Hello RabbitMQ!";
//1 exchange 2 routingKey
channel.basicPublish("", "test001", properties, msg.getBytes());
}
//5 記得要關閉相關的連接
channel.close();
connection.close();
}
}
4.2 消費者代碼
package com.star.movie.message;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.QueueingConsumer;
import com.rabbitmq.client.QueueingConsumer.Delivery;
import com.star.movie.common.Constant;
import java.util.Map;
/**
* @Description:Consumer
* @author:kaili
* @Date: 2019-04-21 23:06
**/
public class MessageConsumer {
public static void main(String[] args) throws Exception {
//2 通過連接工廠創建連接
Connection connection = Constant.getConnection();
//3 通過connection創建一個Channel
Channel channel = connection.createChannel();
//4 聲明(創建)一個隊列
String queueName = "test001";
channel.queueDeclare(queueName, true, false, false, null);
//5 創建消費者
QueueingConsumer queueingConsumer = new QueueingConsumer(channel);
//6 設置Channel
channel.basicConsume(queueName, true, queueingConsumer);
while(true){
//7 獲取消息
Delivery delivery = queueingConsumer.nextDelivery();
String msg = new String(delivery.getBody());
System.err.println("消費端: " + msg);
Map<String, Object> headers = delivery.getProperties().getHeaders();
System.err.println("headers get my1 value: " + headers.get("my1"));
//Envelope envelope = delivery.getEnvelope();
}
}
}
4.3 啓動項目
首先啓動消費者代碼
然後啓動生產者代碼
觀察消費者的控制檯
head中封裝的消息在消費者端獲取到了