What is JMS (Java Message Service)?

JMS is a Java API specification, not a product, that defines a standard way for Java applications to create, send, receive, and read messages. It describes interfaces such as ConnectionFactory, Destination, Session, and MessageProducer/Consumer that any compliant broker must support.

ActiveMQ, Artemis, and IBM MQ are all examples of brokers that implement this contract. Because the API is standardized, application code written against JMS interfaces can often switch brokers with minimal changes, which is why JMS is described as vendor-neutral messaging middleware for Java.

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