JbossMQ

A clean room implementation of the Java Message Service API part of the J2EE specification. It allows asynchronous delivery of messages in distributed systems with optional QOS parameters like persistence, guaranteed delivery or transactions. JBoss-4.x supports the JMS1.1 version of the spec. JBoss-3.2.x supports the JMS1.0.2b spec. It supports two messaging styles: Queue where a message is received by one client. Topic where a message is “broadcast” to multiple client subscribers. NOTE: JMS1.1 includes a combined model of Queue/Topic connections that can be used for both styles. Features Fire and Forget for asynchronous delivery. Guaranteed Delivery using persistent messages and durable subscriptions. JTA XA integration used by JBoss’s JMS Resource Adapter. Pluggable Invocation Layers to support different transport mechanisms, including http, rmi, tcp/ip and in memory invocations. Pluggable Security to support different security mechanisms. Pluggable Persistence to support different persistence mechanisms. High Availability in a clustered environment.