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What is Producer and Consumer?
JMS Interview Questions and Answers
(Continued from previous question...)
30. What is Producer and Consumer?
A1:
Messaging lets a servlet delegate processing to a
batch process either on the same machine or on a
separate machine. The servlet creates a message and
sends it to a queue. The servlet immediately completes
and when the batch process is ready, it processes the
message.
Messaging is therefore comprised of three main
components:
A Producer creates messages and sends them to a Queue.
The Producer could be something like a Servlet.
A Queue stores the messages from the Produces and
provides them to a Consumer when ready. The Queue is
implemented by the messaging provider.
A Consumer processes messages as they become available
in the Queue. The Consumer is typically a bean
implementing the MessageListener interface.
A2:
A producer is the client application that plays the
role of a message sender in JMS API.
A consumer is the client application that plays the
role of a message receiver in JMS API.
(Continued on next question...)
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