Apache ActiveMQ is the most popular and powerful open source Message Broker and Enterprise Integration Patterns provider.

Apache ActiveMQ is fast, supports many Cross Language Clients and Protocols, comes with easy to use Enterprise Integration Patterns and many advanced features while fully supporting JMS 1.1 and J2EE 1.4.

New Features in 5.2

The new features and enhancements in this release include:

• Additional advisory messages for messages delivered/consumed fast producers/slow consumers, Usage limits, Slaves become masters etc.
• Enhanced ssl context configuration through spring/xbean
• New individual acknowledge mode for message consumption
• Ability to configure the automatic discarding of the items being sent to the dead letter queue
• Ability to limit the maximum number of connections to a Broker
• Ability to configure separate lock Datasource for JDBC Master slave.
• activemq-camel and activemq-connection-pool now have their own modules, no longer in activemq-core
• The default ActiveMQConnectionFactory brokerUrl now uses the failover transport.
• Uses Apache Camel 1.5.

ActiveMQ 5.2.0 Release