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 so ...

message broker A message broker (also known as an integration broker or interface engine) is an intermediary computer program module that translates a message from the formal messaging protocol of the sender to the formal messaging protocol of the receiver. Mess ...

written in Java together with a full

Java Message Service The Jakarta Messaging API (formerly Java Message Service or JMS API) is a Java application programming interface (API) for message-oriented middleware. It provides generic messaging models, able to handle the producer–consumer problem, that can ...

(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 In computing, a database is an organized collection of data stored and accessed electronically. Small databases can be stored on a file system, while large databases are hosted on computer clusters or cloud storage. The design of databases ...

as a JMS persistence provider besides

virtual memory In computing, virtual memory, or virtual storage is a memory management technique that provides an "idealized abstraction of the storage resources that are actually available on a given machine" which "creates the illusion to users of a very ...

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, and

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persistency. There's another broker under the ActiveMQ umbrella code-named ''Artemis''. It is based on the

HornetQ HornetQ is an open-source asynchronous messaging project from JBoss. It is an example of Message-oriented middleware. HornetQ is an open source project to build a multi-protocol, embeddable, very high performance, clustered, asynchronous messaging ...

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 ...

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 Apache ZooKeeper is an open-source server for highly reliable distributed coordination of cloud applications. It is a project of the Apache Software Foundation. ZooKeeper is essentially a service (systems architecture), service for distributed co ...

. 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,

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MQTT MQTT (originally an initialism of MQ Telemetry Transport) is a lightweight, publish-subscribe, machine to machine network protocol for Message queue/Message queuing service. It is designed for connections with remote locations that have devices ...

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-subsc ...

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, 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 An enterprise service bus (ESB) implements a communication system between mutually interacting software applications in a service-oriented architecture (SOA). It represents a software architecture for distributed computing, and is a special varia ...

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 Apache CXF is an open source software project developing a Web services framework. It originated as the combination of Celtix developed by IONA Technologies and XFire developed by a team hosted at Codehaus in 2006. These two projects were combin ...

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 Spec may refer to: *Specification (technical standard), an explicit set of requirements to be satisfied by a material, product, or service **datasheet, or "spec sheet" People * Spec Harkness (1887-1952), American professional baseball pitcher ...

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

* *

External links

*
Official GitHub repository
{{DEFAULTSORT:Apache Activemq

ActiveMQ Apache ActiveMQ is an 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 one client or server. Su ...

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