The RabbitMQ STOMP plugin supports advanced queue features, which can be defined in the management interface but also from clients when the queue is created. No matter how these features have been declared, RabbitMQ requires that the client specifies the same feature settings anytime when this queue is used.
Apache ActiveMQ 5.12.0 resolves several issues, and provides significant improves to the AMQP and MQTT support in the broker as well as fixing issues with STOMP and MQTT over WebSockets plus much much more.
The RabbitMQ team announced the release of RabbitMQ 3.5.0. This release adds support for priority queues which were available as a plugin before. Performance is improved; in particular messages smaller than configurable size are embedded in the queue index to reduce I/O and memory consumption. Stability of clustering and autoheal partition handling is improved as well. A new pause_if_all_down partition handling mode is added. The management web UI now shows many more I/O statistics. Binary and source distributions of the new release can be found on the download page.
For application integration in Delphi and Free Pascal, Habarisoft offers a commercial client library for RabbitMQ 3.4.0 and newer.