How does jms listener work

MessageListener ; import javax. TextMessage ; import org. Logger ; import org. LoggerFactory ; import org. Autowired ; import org. JmsListener ; import org. JmsTemplate ; import org.

Testing the JMS listener We change the existing test case to check if our different message listeners work. TimeUnit ; import org. EmbeddedActiveMQBroker ; import org. ClassRule ; import org.

Test ; import org. RunWith ; import org. SpringBootTest ; import org. SimpleMessageListenerContainer ; import org. To scale out, you can for example have 10 clients all connected to the same queue - but only one of them will receive a particular message.

If no clients are connected, message will stay on the queue until someone connects or the message times out. Topic: all clients will receive a copy of each message.

Typically used in a subscriber scenario where many endpoints are potentially interested in each message. A durable subscriber can even be down for a while; message will be kept until subscriber is up again or the message times out. If no clients are connected and there are no durable subscribers, message will be dropped. In PTP model , one message is delivered to one receiver only. It is like broadcasting. Here, Topic is used as a message oriented middleware that is responsible to hold and deliver messages.

Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. How does JMS Receive work internally? Ask Question. Asked 10 years, 6 months ago. Active 4 years, 4 months ago. Viewed 23k times. Question 1: Is my basic understanding of JMS correct?

Question 2: Does receive typically block if no messages are avaiable? Question 3: How does JMS scale? Improve this question. Travis Travis 2, 4 4 gold badges 24 24 silver badges 46 46 bronze badges. Instructions on getting the source here. You may want to read the architecture and concepts sections in the docs too, it may help you reduce the scope of your questions somewhat. Add a comment. Active Oldest Votes. I am trying to answer few questions based on my experience on JMS.

I am not sure if you are looking answer for a particular JMS compliant messaging framework? Improve this answer. I realize that JMS is just a specification, so I basically read your answer as "it is implementation dependent" which is totally acceptable.

A more general question might be how does an asychronous messaging architecture scale without a negative performance impact assuming all subscribers are either polling, opening connections and blocking, or waiting for a broadcast. For example, Active MQ is a JMS server that is provided by Apache provider My assumption on publishing is that the JMS Provider simply waits until a message is published, then stores it in a queue memory or database-backed, depending on implementation.

Does receive typically block if no messages are avaiable? If so, how is blocking achieved? Aniket Thakur Aniket Thakur 61k 35 35 gold badges silver badges bronze badges.

You have four main components: JMS Provider is the component that mediates the messages between producer and consumer. How does Spring JMS listener work? Category: sports rowing. A JMS listener will pick up the message and send a status message to two different status queues. What is the purpose of JMS? What is JMS and how it works? Where is JMS used? What is JMS topic vs queue? What is a JMS queue? How does a message queue work? What is ActiveMQ used for? What is message listener container?

What is JMS and Activemq? What is JMS template in spring? What is the use of JmsTemplate in spring? In the onMessage method, you define the actions to be taken when a message arrives.

You register the message listener with a specific MessageConsumer by using the setMessageListener method. For example, if you define a class named Listener that implements the MessageListener interface, you can register the message listener as follows:.

After you register the message listener, you call the start method on the Connection to begin message delivery.