Message Queuing RABBITMQ and spring

1.RabbitMQ Introduction

RABBITMQ is a popular open source Message Queuing system, developed in Erlang language. RABBITMQ is the standard implementation of the AMQP (Advanced Message Queuing protocol).
Official website: http://www.rabbitmq.com/

2.Spring Integrated RabbitMQ2.1 maven Configuration

//pom.xml<dependency>      <groupId>com.rabbitmq</groupId>      <artifactId>amqp-client</artifactId>      <version>3.5.1</version>    </dependency>    <dependency>        <groupId>org.springframework.amqp</groupId>        <artifactId>spring-rabbit</artifactId>        <version>1.4.5.RELEASE</version>    </dependency>

2.2 RABBMITMQ configuration file

//rabbitmq-config.propertiesmq.host=127.0.0.1mq.username=testmq.password=123456mq.port=5672mq.vhost=testmq

2.3 Spring Configuration

Application-mq.xml<beans xmlns= "Http://www.springframework.org/schema/beans" xmlns:xsi= "http://www.w3.org/ 2001/xmlschema-instance "xmlns:rabbit=" Http://www.springframework.org/schema/rabbit "xsi:schemalocation="/HTTP/ Www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www . springframework.org/schema/rabbit Http://www.springframework.org/schema/rabbit/spring-rabbit-1.0.xsd "> < DESCRIPTION&GT;RABBITMQ Connection Service Configuration </description> <!--connection configuration-<rabbit:connection-factory id= "connectionf Actory "host=" ${mq.host} "Username=" ${mq.username} "password=" ${mq.password} "port=" ${mq.port} "virtual-host=" ${ Mq.vhost} "/> <rabbit:admin connection-factory=" ConnectionFactory "/> <!--spring Template declaration--< Rabbit:template exchange= "Amqpexchange" id= "Amqptemplate" connection-factory= "ConnectionFactory" Message-converter = "Jsonmessageconverter"/> <!--Message object JSON conversion class--&Gt <bean id= "Jsonmessageconverter" class= " Org.springframework.amqp.support.converter.Jackson2JsonMessageConverter "/> </beans>

3. Use RabbitMQ3.1 in spring to declare a Message Queuing queue

//application-mq.xml<rabbit:queue id="test_queue_key" name="test_queue_key" durable="true" auto-delete="false" exclusive="false" />

Description

Durable: whether to persist

Exclusive: Only private queues that the creator can use, automatically deleted after disconnection

Auto_delete: Automatically delete queues when all consumer client connections are disconnected

3.2 Switch Definition

//application-mq.xml<rabbit:direct-exchange name="test-mq-exchange" durable="true" auto-delete="false" id="test-mq-exchange">    <rabbit:bindings>        <rabbit:binding queue="test_queue_key" key="test_queue_key"/>    </rabbit:bindings></rabbit:direct-exchange>

Description

Rabbit:direct-exchange: Defines the Exchange Mode as direct, meaning that the message is not forwarded until it exactly matches a specific routing key .

Rabbit:binding: Set Message queue matching key

3.3 Sending a message producer

//MQProducer.javapublic interface MQProducer {    /**     * 发送消息到指定队列     * @param queueKey     * @param object     */    public void sendDataToQueue(String queueKey, Object object);}

@Servicepublic class MQProducerImpl implements MQProducer {    @Autowired    private AmqpTemplate amqpTemplate;    private final static Logger LOGGER = Logger.getLogger(MQProducerImpl.class);    /* (non-Javadoc)     * @see com.stnts.tita.rm.api.mq.MQProducer#sendDataToQueue(java.lang.String, java.lang.Object)     */    @Override    public void sendDataToQueue(String queueKey, Object object) {        try {            amqpTemplate.convertAndSend(queueKey, object);        } catch (Exception e) {            LOGGER.error(e);        }    }}

Description

Convertandsend: Converting a Java object to a message sent to a switch that matches key exchange, where JSON conversion is configured, this is the form of converting a Java object into a JSON string. Original: Convert a Java object to an AMQP Message and send it to a default exchange with a specific routing key.

3.4 Receiving Messages asynchronously consumer

Defining listeners

//QueueListenter.java@Componentpublic class QueueListenter implements MessageListener {    @Override    public void onMessage(Message msg) {        try{            System.out.print(msg.toString());        }catch(Exception e){            e.printStackTrace();        }    }}

Monitoring Configuration

//application-mq.xml<rabbit:listener-container connection-factory="connectionFactory" acknowledge="auto">    <rabbit:listener queues="test_queue" ref="queueListenter"/></rabbit:listener-container>

Description

Queues: Listener queue, multiple words separated by commas (,)

Ref: Listener

3.5 JUnit Test

//TestQueue.java@RunWith(value = SpringJUnit4ClassRunner.class)@ContextConfiguration(locations = {    "classpath:/ApplicationContext/ApplicationContext-mq.xml"})public class TestQueue{    @Autowired    MQProducer mqProducer;    final String queue_key = "test_queue";    @Test    public void send(){        Map<String,Object> msg = new HashMap()<>;        msg.put("data","hello,rabbmitmq!");        mqProducer.sendDataToQueue(query_key,msg);    }}

Running the test program, run with JUnit, sends a message to Test_queue, which, after the listener hears the message, prints the message.

At this point, the spring and RABBMITMQ integration, configuration, and use have been completed.

Message Queuing RABBITMQ and spring