activemq durable topic

1. What is a durable topic?
2. How do I create a durable subscriber in ActiveMQ?
3. What is ActiveMQ topic?
4. How can I increase my ActiveMQ performance?
5. What is durable topic JMS?
6. What is JMS Queue and Topic?
7. What is a durable queue?
8. What is durable subscriber?
9. What is topic and queue?
10. What is a JMS topic?
11. What is a topic in messaging?
12. What is a virtual topic?

What is a durable topic?

Once a client registers to receive messages for a topic, a durable topic keeps messages for that client when the client is disconnected.

How do I create a durable subscriber in ActiveMQ?

Subscribers can subscribe to a topic on ActiveMQ as durable subscribers by using the createDurableSubscriber() method available in javax. jms. Session class. To create a non-durable subscriber, instead of using the session.

What is ActiveMQ topic?

ActiveMQ topic is a pipeline of messages where a message comes in and goes to every subscriber. Both ActiveMQ queue and ActiveMQ topic are places where messages are sent. The difference is in who receives the message. The ActiveMQ queue is a dynamic queue.

How can I increase my ActiveMQ performance?

By default, ActiveMQ strikes a balance between the two, so there are some things you can change to increase throughput.

1. Async Publishing. First some background: ...
2. Pre-fetch Sizes for Consumers. ...
3. Optimized Acknowledge. ...
4. Straight through Session Consumption. ...
5. File based Persistence. ...
6. Performance guides.

What is durable topic JMS?

A durable subscriber registers a durable subscription with a unique identity that is retained by the JMS provider. ... If a durable subscription has no active subscriber, the JMS provider retains the subscription's messages until they are received by the subscription or until they expire.

What is JMS Queue and Topic?

A JMS destination is an object (a JMS queue or a JMS topic) that represents the target of messages that the client produces and the source of messages that the client consumes. In point-to-point messaging, destinations represent queues; in publish/subscribe messaging, destinations represent topics.

What is a durable queue?

Durable queues keep messages around persistently for any suitable consumer to consume them. Durable queues do not need to concern themselves with which consumer is going to consume the messages at some point in the future. There is just one copy of a message that any consumer in the future can consume.

What is durable subscriber?

A durable subscriber registers a durable subscription by specifying a unique identity that is retained by the JMS provider. ... If a durable subscription has no active subscriber, the JMS provider retains the subscription's messages until they are received by the subscription or until they expire.

What is topic and queue?

Queue is JMS managed object used for holding messages waiting for subscribers to consume. ... Topic is that all subscribers to a topic receive the same message when the message is published.

What is a JMS topic?

The term JMS topic is used to refer to the JMS destination (an instance of javax. jms. Topic) that applications interact with, and that an administrator configures as a JMS resource of the default messaging provider. ... JMS applications can publish messages to, and subscribe to messages from, JMS topics.

What is a topic in messaging?

A topic is the subject of the information that is published in a publish/subscribe message. Messages in point-to-point systems are sent to a specific destination address. ... In content-based systems, messages are sent to subscribers based on the contents of the message itself.

What is a virtual topic?

Virtual topics are a combination of topics and queues. Producers will write messages to a topic while listeners will consume from their own queue. ActiveMQ will copy and duplicate each message from the topic to the actual consumer queues. Even if a consumer is offline, no messages will be lost. ...