In the case of point-to-point messaging, the broker sends a message to an address configured with the anycast routing type, and the message is placed into a queue where it will be retrieved by a single consumer. Artemis, on the other hand, uses queues to support both types of messaging and uses routing types to impose the desired behavior. The ActiveMQ Classic architecture contains the broker, destinations, and client applications.Īs shown above, Classic sends point-to-point messages via queues and pub/sub messages via topics. The diagram below illustrates the components in an ActiveMQ Classic deployment. Both ActiveMQ versions are capable of point-to-point messaging-in which the broker routes each message to one of the available consumers in a round-robin pattern-and publish/subscribe (or “pub/sub”) messaging-in which the broker delivers each message to every consumer that is subscribed to the topic (in ActiveMQ Classic) or address (in ActiveMQ Artemis). The ActiveMQ broker routes each message through a messaging endpoint called a destination (in ActiveMQ Classic) or an address (in Artemis). How does ActiveMQ work?ĪctiveMQ sends messages between client applications- producers, which create messages and submit them for delivery, and consumers, which receive and process messages. In this post, we’ll look at how ActiveMQ works and explore some key ActiveMQ metrics you can monitor to understand the performance of your messaging infrastructure. Essentially, each of these technologies supports enterprise messaging through a loosely coupled infrastructure. Amazon also offers Amazon MQ, a managed implementation of ActiveMQ Classic. Once Artemis evolves to include all of the features available in the Classic version, Apache will support only a single version.ĪctiveMQ is comparable to other messaging systems, such as Apache Kafka, RabbitMQ, and Amazon Simple Queue Service. Apache currently offers two versions of ActiveMQ: Classic and Artemis. Using standards-based, asynchronous communication, ActiveMQ allows loose coupling of the services that make up an application, which is often foundational to enterprise messaging and distributed applications.ĪctiveMQ is a Java-based open source project developed by the Apache Software Foundation. Editor’s note (September 2021): This post has been updated to include new information about ActiveMQ Artemis.Īpache ActiveMQ is message-oriented middleware (MOM), a category of software that sends messages between applications.
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