JMS APIs provide an interface to send, receive, and authenticate asynchronous messages through Java. They let you develop a client connecting to a message engine. The message engine used in WildFly is Active MQ Artemis, a substitute for the deprecated JBoss Messaging. The difference between this specification and the older one is simplicity of use and development thanks to the new annotations. These annotations will be covered in detail in Chapter 8, Working with Messaging.
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