Java Message Service (JMS)
The Java Message Service (JMS) API is a Java Message Oriented Middleware (MOM) API for sending messages between two or more clients. The following are JMS elements:
• MS provider: An implementation of the JMS interface for a Message Oriented Middleware (MOM). Providers are implemented as either a Java JMS implementation or an adapter to a non-Java MOM.
• JMS client: An application or process that produces and/or receives messages.
• JMS producer/publisher: A JMS client that creates and sends message.
• JMS consumer/subscriber: A JMS client that receives message.
• JMS message: An object that contains the data being transferred between JMS clients.
• JMS queue: A staging area that contains messages that have been sent and are waiting to be read (by only one consumer). Note that, contrary to what the name queue suggests, messages don't have to be delivered in the order sent. A JMS queue only guarantees that each message is processed only once.
• JMS topic: A distribution mechanism for publishing messages that are delivered to multiple subscribers.
The JMS API supports two models:
• Publish and subscribe
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