Use Spring JMS to realize asynchronous news transmission
Use Spring JMS to realize asynchronous news transmission
introduce:
Spring JMS is one of the modules used in the Spring framework to interact with message agents.It provides a simple and powerful way to achieve asynchronous news transmission.Through Spring JMS, developers can decoup up important business logic from the main application so that they can handle it asynchronous.
Spring JMS is mainly based on Java Message Service (JMS). JMS is a specification for providing a message transmission mechanism for distributed applications.Using JMS can reliably pass messages between different applications.Spring JMS provides simpler API and easy -to -use features to interact with JMS.
step:
In the Spring framework, the use of Spring JMS to achieve asynchronous message transmission needs to complete the following steps:
1. Configure JMS connection factory:
First of all, you need to configure the JMS connection factory for the connection with the message agent.You can use the Spring configuration file (such as Application.properties) to set up related parameters connecting the factory.
2. Create a JMS template:
Next, you need to create a JMSTEMPLATE object for sending and receiving messages.JMSTEMPLATE is one of the core categories of Spring JMS. It provides a series of simple and convenient methods to send and receive messages.
3. Write a message monitor:
Create a message monitor for asynchronous receiving messages.You can use Spring's MESSAGELISTENER interface as the foundation and implement the onMessage method to process the received messages.
4. Registration message monitor:
Register the message monitor on the JMSTEMPlate object for processing when the message arrives.You can use the timeout of the receiving message to set the receiving message using the setReceivetimeout method of the Spring's JmsTemPlate.
5. Send message:
Use JMSTEMPlate to send messages to the specified destination (such as queue or theme).
Example code:
Below is a simple sample code that uses Spring JMS to implement asynchronous messages:
1. Configure the JMS connection factory (Application.properties):
spring.activemq.broker-url=tcp://localhost:61616
spring.activemq.user=admin
spring.activemq.password=admin
2. Create jmstemplate:
@Configuration
public class JmsConfig {
@Value("${spring.activemq.broker-url}")
private String brokerUrl;
@Bean
public ConnectionFactory connectionFactory() {
ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory();
connectionFactory.setBrokerURL(brokerUrl);
connectionFactory.setTrustAllPackages(true);
return connectionFactory;
}
@Bean
public JmsTemplate jmsTemplate(ConnectionFactory connectionFactory) {
JmsTemplate jmsTemplate = new JmsTemplate();
jmsTemplate.setConnectionFactory(connectionFactory);
return jmsTemplate;
}
}
3. Write a message monitor:
@Component
public class MessageListenerImpl implements MessageListener {
@Override
public void onMessage(Message message) {
try {
TextMessage textMessage = (TextMessage) message;
System.out.println("Received message: " + textMessage.getText());
} catch (JMSException e) {
e.printStackTrace();
}
}
}
4. Registration message monitor:
@SpringBootApplication
public class Application {
@Autowired
private JmsTemplate jmsTemplate;
@Bean
public DefaultMessageListenerContainer messageListenerContainer() {
DefaultMessageListenerContainer container = new DefaultMessageListenerContainer();
container.setConnectionFactory(jmsTemplate.getConnectionFactory());
container.setDestinationName("sample.queue");
container.setMessageListener(new MessageListenerAdapter(new MessageListenerImpl()));
return container;
}
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
5. Send message:
@RestController
@RequestMapping("/message")
public class MessageController {
@Autowired
private JmsTemplate jmsTemplate;
@PostMapping("/")
public void sendMessage(@RequestBody String message) {
jmsTemplate.send("sample.queue", session -> session.createTextMessage(message));
}
}
Through the above steps, you can use Spring JMS to transfer asynchronous messages.When the message sent to the message agent, the message monitor will receive and process them asynchronously.This method can improve the performance of the application while providing better scalability and maintenance.
