4.Rabbitmq Publish/Subscribe
【摘要】 前言发布订阅模式,如下所示:p: 生产者,生产消息;x: 交换机,接收消息;c1,c2: 消息队列代码build.gradleplugins { id 'java'}group 'com.nick'version '1.0-SNAPSHOT'sourceCompatibility = 1.8repositories { mavenCentral()}dependencies { ...
前言
发布订阅模式,如下所示:
p: 生产者,生产消息;
x: 交换机,接收消息;
c1,c2: 消息队列
代码
build.gradle
plugins {
id 'java'}
group 'com.nick'version '1.0-SNAPSHOT'sourceCompatibility = 1.8
repositories {
mavenCentral()
}
dependencies {
testCompile group: 'junit', name: 'junit', version: '4.12'
compile group: 'com.rabbitmq', name: 'amqp-client', version: '5.2.0'
compile group: 'org.slf4j', name: 'slf4j-api', version: '1.7.25'
compile group: 'org.slf4j', name: 'slf4j-simple', version: '1.7.25'
compile group: 'org.projectlombok', name: 'lombok', version: '1.18.0'}
EmitLog.java
package com.nick.publishSubscribe;import com.rabbitmq.client.Channel;import com.rabbitmq.client.Connection;import com.rabbitmq.client.ConnectionFactory;import java.util.concurrent.TimeoutException;public class EmitLog { private static final String EXCHANGE_NAME = "logs"; public static void main(String[] argv)
throws java.io.IOException, TimeoutException {
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("192.168.5.136");
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();
channel.exchangeDeclare(EXCHANGE_NAME, "fanout"); //String message = getMessage(argv);
String message = "hello publish and subscribe.";
channel.basicPublish(EXCHANGE_NAME, "key_nick", null, message.getBytes());
System.out.println(" [x] Sent '" + message + "'");
channel.close();
connection.close();
System.exit(0);
}
}
ReceiveLogs.java
package com.nick.publishSubscribe;import com.rabbitmq.client.*;import java.io.IOException;public class ReceiveLogs { private static final String EXCHANGE_NAME = "logs"; public static void main(String[] argv) throws Exception {
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("192.168.5.136");
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();
channel.exchangeDeclare(EXCHANGE_NAME, "fanout");
String queueName = channel.queueDeclare().getQueue();
channel.queueBind(queueName, EXCHANGE_NAME, "key_nick");
System.out.println(" [*] Waiting for messages. To exit press CTRL+C");
Consumer consumer = new DefaultConsumer(channel) { @Override
public void handleDelivery(String consumerTag, Envelope envelope,
AMQP.BasicProperties properties, byte[] body) throws IOException {
String message = new String(body, "UTF-8");
System.out.println(" [x] Received '" + message + "'");
}
};
channel.basicConsume(queueName, true, consumer);
}
}
执行效果
执行ReceiveLogs,再执行EmitLog查看日志打印,可以看到接收到了数据
详细代码
详细代码可以在github上下载:https://github.com/qiujiahong/rabbitmq_study
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