Wat is ActiveMQ topic?
3 min readWhat Is an ActiveMQ Topic? ActiveMQ topic is a pipeline of messages where a message comes in and goes to every subscriber.
What is queue and Topic in ActiveMQ?
Queue is JMS managed object used for holding messages waiting for subscribers to consume. When all subscribers consumed the message , message will be removed from queue. Topic is that all subscribers to a topic receive the same message when the message is published. Follow this answer to receive notifications.
What is a topic in queue?
A topic subscription resembles a virtual queue that receives copies of the messages that are sent to the topic. Consumers receive messages from a subscription identically to the way they receive messages from a queue.
What is ActiveMQ advisory topic?
ActiveMQ supports advisory messages which allows you to watch the system using regular JMS messages. Currently we have advisory messages that support: consumers, producers and connections starting and stopping. temporary destinations being created and destroyed. messages expiring on topics and queues.
What is difference between queue and topic?
The main difference between queue and topic is that queue is the message-oriented middleware used in point to point message domain, while the topic is the message-oriented middleware used in publisher- subscriber message domain.
What is topic in Java?
It is the way a client specifies the identity of a topic to JMS API methods. For those methods that use a Destination as a parameter, a Topic object may used as an argument . For example, a Topic can be used to create a MessageConsumer and a MessageProducer by calling: Session.
How do I create a topic in ActiveMQ?
That’s where ActiveMQ comes in.
- Step 1: Download and start ActiveMQ. …
- Step 2: Download the JMS Example file. …
- Step 4: Open three additional console windows. …
- Step 3: Do the Maven Install. …
- Step 4: Start the JMS Consumers and Producer for Topic-based Messaging. …
- Step 5: Send JMS messages to the Topic.
What is difference between RabbitMQ and ActiveMQ?
ActiveMQ is used in enterprise projects to store multiple instances and supports clustering environments based on the JMS messaging specification. RabbitMQ is a message broker which is executed in low-level AMQP protocol and acts as an intermediator between two application in the communication process.
What is ActiveMQ JMS?
ActiveMQ is a JMS provider. A JMS provider forms the software framework for facilitating the use of JMS concepts inside an application. A single node of ActiveMQ which allows clients to connect to it and use these messaging concepts is called an “ActiveMQ Broker.” So, ActiveMQ is a message broker that implements JMS.
What is WebLogic topic?
What is an Oracle WebLogic JMS Topic ? Messages are put on Queues or on Topics. If a message is put on a Topic, many application can read it. In this case we can speak about “Publish/Subscribe (pub/sub)” messaging model.
What is connection factory in WebLogic?
Connection factories are resources that enable JMS clients to create JMS connections. A connection factory supports concurrent use, enabling multiple threads to access the object simultaneously. Oracle WebLogic Server supports the default connection factory defined by the Java EE 7 specification.
What is JMS connection factory?
A connection factory is an object that a JMS client (a JMS program that uses the JMS API) uses to create a connection with a JNDI provider (a messaging provider such as IBM® MQ).
