RabbitMQ Hello world(二)
简介：
Rabbitmq 是消息代理中间件，它接收或者发送消息。你可以把它想想宬一个邮局：当你把邮件放到邮箱时，你可以确定某一位邮递员可以准确的把邮件送到收件人手中，在这个比喻中，rabbitmq是一个邮箱，邮局及邮递员。
Rabbitmq和邮局的区别是，它不处理纸张，它接收，存储，转发二进制文件消息。
Rabbitmq 消息服务中几个术语。
- 生产者：发送消息。消息的产生者。
- 队列：在Rabbitmq内部，如同邮箱。尽管消息流转通过RabbitMq和你的应用，但是只被存储在对列里。对列只能绑定到主机内存并且磁盘限制，本质上是一个大的消息缓存。生产者发送消息到对列中，消费者从对列中接收数据。
- 消费者：接收消息，大部分接收程序等待接收消息。
Hello world
Maven
<dependency>
<groupId>com.rabbitmq</groupId>
<artifactId>amqp-client</artifactId>
<version>5.7.3</version>
</dependency>
RabitMqConnectionConfig.java
package com.rabitmq.config; import java.io.IOException; import java.util.concurrent.TimeoutException; import com.rabbitmq.client.Connection; import com.rabbitmq.client.ConnectionFactory; public class RabitMqConnectionConfig { //MQ 连接地址 private static final String RABIT_MQ_HOST = "localhost"; private static final int RABIT_MQ_PORT = 5672; private static final String RABIT_MQ_USER_NAME = "guest"; private static final String RABIT_MQ_USER_PASSWD = "guest"; // private static final String RABIT_TEST_EXCHANGE = "test_exchange"; public static final String RABIT_TEST_QUEUE = "test_rabit_mq"; /** * rabbitmq 连接器 * @return * @throws IOException * @throws TimeoutException */ public static Connection getConnection() throws IOException, TimeoutException { ConnectionFactory connectionFactory = new ConnectionFactory(); connectionFactory.setHost(RABIT_MQ_HOST); connectionFactory.setPort(RABIT_MQ_PORT); connectionFactory.setUsername(RABIT_MQ_USER_NAME); connectionFactory.setPassword(RABIT_MQ_USER_PASSWD); return connectionFactory.newConnection(); } /** * * @param connection * @throws IOException */ public static void closeConnection(Connection connection) throws IOException { if(connection != null) { connection.close(); } } }
RabitMqProducer.java
package com.rabitmq.producer; import java.io.IOException; import java.util.HashMap; import java.util.Map; import java.util.concurrent.TimeoutException; import com.rabbitmq.client.Channel; import com.rabbitmq.client.Connection; import com.rabitmq.config.RabitMqConnectionConfig; public class RabitMqProducer { //发布者名称 private String producerName; public RabitMqProducer(String producerName) { super(); this.producerName = producerName; } public void send(String message) { Connection connection = null; Channel channel = null; try { connection = RabitMqConnectionConfig.getConnection(); channel = connection.createChannel(); Map<String, Object> map = new HashMap<String, Object>(); map.put("x-queue-type", "classic"); channel.queueDeclare(RabitMqConnectionConfig.RABIT_TEST_QUEUE, true, false, false, map); // channel.queueBind(RABIT_TEST_QUEUE, RABIT_TEST_EXCHANGE, ""); // String sendMessage = "producerName:" + this.producerName + ",message:"+message; for (int i = 0; i < 1000;i++) { String sendMessage = "producerName:" + this.producerName + ",message:"+message + "----"+i; channel.basicPublish("", RabitMqConnectionConfig.RABIT_TEST_QUEUE, null, sendMessage.getBytes("utf-8")); System.out.println("sendMessage:["+ sendMessage +"]"); } } catch (IOException e) { e.printStackTrace(); } catch (TimeoutException e) { e.printStackTrace(); }finally { if(channel != null) { try { channel.close(); } catch (IOException e) { e.printStackTrace(); } catch (TimeoutException e) { e.printStackTrace(); } } if(connection != null) { try { connection.close(); } catch (IOException e) { e.printStackTrace(); } } } } public static void main(String[] args) { String message = "你好棒呀"; new RabitMqProducer("pro_aaa").send(message); new RabitMqProducer("pro_bbb").send(message); new RabitMqProducer("pro_ccc").send(message); new RabitMqProducer("pro_ddd").send(message); } }
RabitMqConsumer.java
package com.rabitmq.consumer; import java.io.IOException; import java.util.HashMap; import java.util.Map; import java.util.concurrent.TimeoutException; import com.rabbitmq.client.CancelCallback; import com.rabbitmq.client.Channel; import com.rabbitmq.client.Connection; import com.rabbitmq.client.DeliverCallback; import com.rabbitmq.client.Delivery; import com.rabitmq.config.RabitMqConnectionConfig; public class RabitMqConsumer { public RabitMqConsumer() { } public String receive(final String consumerName) { System.out.println( consumerName + " receive start" ); Connection connection =null; Channel channel = null; try { connection = RabitMqConnectionConfig.getConnection(); channel = connection.createChannel(); Map<String, Object> args = new HashMap<>(); args.put("x-queue-type", "classic"); channel.queueDeclare(RabitMqConnectionConfig.RABIT_TEST_QUEUE, true, false, false, args); channel.basicConsume(RabitMqConnectionConfig.RABIT_TEST_QUEUE, true, new DeliverCallback() { @Override public void handle(String consumerTag, Delivery message) throws IOException { String messageStr = new String(message.getBody(),"utf-8"); System.out.println("consumerName :" + consumerName + " ,deliver call back" + consumerTag + ",message:" + messageStr); } }, new CancelCallback() { @Override public void handle(String consumerTag) throws IOException { System.out.println("consumerName :" + consumerName + " ,Cancel call back :" + consumerTag); } }); } catch (IOException e) { e.printStackTrace(); } catch (TimeoutException e) { e.printStackTrace(); }finally { // if(channel != null) { // try { // channel.close(); // } catch (IOException e) { // e.printStackTrace(); // } catch (TimeoutException e) { // e.printStackTrace(); // } // } // if(connection != null) { // try { // connection.close(); // } catch (IOException e) { // e.printStackTrace(); // } // } } return ""; } public static void main(String[] args) { new RabitMqConsumer().receive("consumer_aaa"); new RabitMqConsumer().receive("consumer_bbb"); new RabitMqConsumer().receive("consumer_ccc"); new RabitMqConsumer().receive("consumer_ddd"); } }
