Java Message Service

The Java Message Service is a Java API used for sending and receiving messages. It is vendor-independent, and is used almost universally in enterprise messaging systems such as that included in Java CAPS. JMS provides a standard, currently embodied in the JMS version 1.1 specification, which is an integral part of the Java Enterprise Edition (Java EE) Platform 5. The features of the JMS version 1.1 specification have been widely adopted in the Java CAPS JMS implementation, as described in this document. The use of JMS allows loosely coupled, reliable, asynchronous interactions among Java EE components and legacy systems capable of messaging.

Version 1.1 of the JMS API includes the following features:

• Message-driven beans, which enable the asynchronous consumption of JMS messages

• Message send and receive calls that can participate in Java Transaction API transactions

• Java EE Connector Architecture (JCA) interfaces that enable JMS implementations from different vendors to be externally plugged into a Java EE 5 application server

Additionally, the Java EE platform’s Enterprise JavaBeans (EJB) container architecture provides the following enhancements the JMS API:

• Concurrent consumption of messages

• Support for distributed transactions, so that database updates, message processing, and connections to EIS systems using the Java EE Connector Architecture can all participate in the same transaction context