Apache ActiveMQ is an

open source Open source is source code that is made freely available for possible modification and redistribution. Products include permission to use the source code, design documents, or content of the product. The open-source model is a decentralized sof ...

message broker written in Java together with a full Java Message Service (JMS) client. It provides "Enterprise Features" which in this case means fostering the communication from more than one client or server. Supported clients include Java via JMS 1.1 as well as several other "cross language" clients. The communication is managed with features such as

computer clustering A computer cluster is a set of computers that work together so that they can be viewed as a single system. Unlike grid computers, computer clusters have each node set to perform the same task, controlled and scheduled by software. The compo ...

and ability to use any database as a JMS persistence provider besides virtual memory, cache, and journal persistency. There's another broker under the ActiveMQ umbrella code-named ''Artemis''. It is based on the HornetQ code-base which was donated from the JBoss community to the Apache ActiveMQ community in 2015. Artemis is the "next generation" broker from ActiveMQ and will ultimately become the next major version of ActiveMQ.

History

The ActiveMQ project was originally created by its founders from LogicBlaze in 2004, as an open source message broker, hosted by CodeHaus. The code and ActiveMQ trademark were donated to the

Apache Software Foundation The Apache Software Foundation (ASF) is an American nonprofit corporation (classified as a 501(c)(3) organization in the United States) to support a number of open source software projects. The ASF was formed from a group of developers of the A ...

in 2007, where the founders continued to develop the codebase with the extended Apache community.

Technical features

ActiveMQ employs several modes for high availability, including both file-system and database row-level locking mechanisms, sharing of the persistence store via a shared filesystem, or true replication using Apache ZooKeeper. A horizontal scaling mechanism called a Network of Brokers, is also supported out of the box. ActiveMQ supports a relatively large number of transport protocols, including OpenWire, STOMP, MQTT,

AMQP The Advanced Message Queuing Protocol (AMQP) is an open standard application layer protocol for message-oriented middleware. The defining features of AMQP are message orientation, queuing, routing (including point-to-point and publish-and-su ...

, REST, and

WebSockets WebSocket is a computer communications protocol, providing full-duplex communication channels over a single TCP connection. The WebSocket protocol was standardized by the IETF as in 2011. The current API specification allowing web applications ...

Usage

ActiveMQ is used in enterprise service bus implementations such as

Apache ServiceMix Apache ServiceMix is an open-source software project to implement a distributed enterprise service bus (ESB). Architecture ServiceMix is based on the service-oriented architecture (SOA) model. It is a project of the Apache Software Foundation ...

and

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. Other projects using ActiveMQ include

Apache Camel Apache Camel is an open source framework for message-oriented middleware with a rule-based routing and mediation engine that provides a Java object-based implementation of the Enterprise Integration Patterns using an application programming inte ...

and Apache CXF in SOA infrastructure projects.

Benchmark

Coinciding with the release of Apache ActiveMQ 5.3, the world's first results for the SPECjms2007 industry standard benchmark were announced. Four results were submitted to the SPEC and accepted for publication. The results cover different topologies to analyze the scalability of Apache ActiveMQ in two dimensions.

Commercial support

Apache offers limited ActiveMQ support on a volunteer basis. Commercial companies specializing in ActiveMQ are recommended for users needing more extensive support.

References

Bibliography

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External links

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Official GitHub repository
{{DEFAULTSORT:Apache Activemq

ActiveMQ Apache ActiveMQ is an Open-source software, open source message broker written in Java together with a full Java Message Service (JMS) client. It provides "Enterprise Features" which in this case means fostering the communication from more than on ...

Enterprise application integration Java enterprise platform Message-oriented middleware Service-oriented architecture-related products