ActiveMQ is an open source, Apache 2.0 licensed, high performance Messaging Fabric consisting of a scalable cluster of Message Brokers and a complete JMS 1.1 provider which integrates seamlessly into J2EE containers, light weight containers and any Java application.

Features

• JMS 1.1 / J2EE 1.4 compliant
• full support for JCA resource adaptors and inbound & outbound messaging so that ActiveMQ should auto-deploy in any J2EE 1.4 compliant server
• support for transient, persistent, transactional and XA messaging
• supports pluggable transport protocols such as in-VM, TCP, SSL, NIO, UDP, multicast, JGroups and JXTA transports
• supports pluggable persistence such as JDBC, JDBM and Berkeley DB
• designed for high performance clustering, client-server, peer based communication
• REST API to provide technology agnostic and language neutral web based API to messaging
• Streamlets to support web streaming support to web browsers using pure DHTML, allowing web browsers to be part of the messaging fabric
• Axis Support so that ActiveMQ can be easily dropped into Apache Axis runtimes to provide reliable messaging
• Spring Support so that ActiveMQ can be easily embedded into Spring applications and configured using Spring's XML configuration mechanism
• can be used as an in memory JMS provider, ideal for unit testing
• Composite Destinations support to allow many destinations to be used in one simple atomic JMS operation
• JSR 77 / 88 support for easy deployment & management & hot deployment
• reuse the Geronimo stack
• provides an implementation of ActiveCluster
• aims to provide a full ESB as well as a JMS bus
• rules based message routing via Drools