JMS ~ high load where you can add queue’s in front of it to handle weight
Asysnchronous , Message Oriented Middleware
JMS Message Type
Queue point to point messaging
Topic – publish /subscribe messaging
A Session is created from the Connection. Unit of work, transactional capability. Responsible for creation of various JMS message types.
Producer (put message on), Consumer (pull message off)
Destination – point to point or topic are examples
Spring has a JmsTemplate : delegates to collaborators to handle some of work
Message Converter – conver from objects to messages (SimpleMessageConverter)
DestinationResolver – resolve destination names (DynamicDestinationResolver or JNDIDestinationResolver)
Sending messages – one line methods or callback methods
producer call back or session callbacks
MessageDrivenBeans wait for the message. MessageConverters can be used on recption side.
JMS MessageListener aysnchronous reception
Spring has light light weight mechanism for listen for messages, as compared to EJB
SimpleMessageListenerContainer or DefaultMessageListenerContainer
Spring supports 2 phase commit
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