Simple MQ
在此之前,先安裝rabbitMQ,我是在docker上直接部署的,docker-compose.yml
如下:
version: '3'
services:
rabbitmq:
image: rabbitmq:management-alpine
container_name: rabbitmq
environment:
- RABBITMQ_DEFAULT_USER=你的用戶名 # 創建rabbitMQ用戶名和密碼
- RABBITMQ_DEFAULT_PASS=你的密碼
restart: always
ports:
- "15672:15672"
- "5672:5672"
logging:
driver: "json-file"
options:
max-size: "200k"
max-file: "10"
建議大家,以後的部署全部在docker上完成,這是非常方便的。部署完成後直接在瀏覽器中輸入:
你的ip:15672
就能訪問rabbitMQ客戶端了。比如我的 192.168.116.128:15672,就能看到下面的內容:
輸入你剛纔設置的賬號和密碼,即可進入客戶端。
rabbitMQ使用階段
最簡單的消息隊列,官網傳送門:
包含一個消費者,一個生產者,一個MQ
接下來引入需要的依賴:
<dependencies>
<!-- https://mvnrepository.com/artifact/com.rabbitmq/amqp-client -->
<dependency>
<groupId>com.rabbitmq</groupId>
<artifactId>amqp-client</artifactId>
<version>5.7.3</version>
</dependency>
</dependencies>
包含一個消費者,一個生產者,代碼如下:
建立連接(連接工具類):
public class RabbitConnection {
public static Connection getConnection() throws IOException, TimeoutException {
ConnectionFactory factory = new ConnectionFactory();
// address
factory.setHost("192.168.119.129"); // 這是我的linux主機地址,docker下安裝MQ
factory.setUsername("king");
factory.setPassword("123456");
factory.setVirtualHost("/vhosts"); // 節點
return factory.newConnection();
}
}
生產者:
public class Send {
private static final String QUEUE_NAME = "simple_mq"; //消息隊列名稱
public static void main(String[] args) throws IOException, TimeoutException {
Connection connection = RabbitConnection.getConnection();
Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
String message = "hello simple_mq"; // 發送的消息
channel.basicPublish("", QUEUE_NAME, null, message.getBytes());
System.out.println(" [x] Sent.......... '" + message + "'");
}
}
消費者:
public class ReceiV {
private static final String QUEUE_NAME = "simple_mq";
public static void main(String[] args) throws IOException, TimeoutException {
Connection connection = RabbitConnection.getConnection();
Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
System.out.println(" [*] Waiting for messages. To exit press CTRL+C");
DeliverCallback deliverCallback = (consumerTag, delivery) -> {
String message = new String(delivery.getBody(), "UTF-8");
System.out.println(" [x] Received '" + message + "'");
};
channel.basicConsume(QUEUE_NAME, true, deliverCallback, consumerTag -> { });
}
}
如果這裏報錯 lambda ~~~~level 5之類的錯誤,加上下面的內容到pom中:
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
這裏我們啓動兩個Application,發現,只要是啓動一次send,消費者後臺就會接收到message,進行消費。