What is message passing?

Message passing is a general term for a variety of strategies for high-level, structured interclient communication. For example, a mobile agent framework could provide classes and methods with which two agents (on two different computers) send each other messages. The steps required to send and receive messages are specific to the framework. JMS supports two common message passing strategies, namely, point-to-point and publish/subscribe. JMS can be utilized by any (Java-based) distributed software components; of course, the JMS middleware must be available.