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in some of the examples for published/subscriber messaging, i see the use of setJMSCorrelationID() and setClientID(). &nbsp;the documentation for them don't seem to be very clear. &nbsp;what do they do? &nbsp;and are they essential? &nbsp;<br />
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i am try to create a durable subscriber, and i didn't use these two methods, and the subscriber seems to be working fine as far as getting messages that it subcribes for. &nbsp;
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in some of the examples for published/subscriber messaging, i see the use of setJMSCorrelationID() and setClientID().  the documentation for them don't seem to be very clear.  what do they do?  and are they essential?  

i am try to create a durable subscriber, and i didn't use these two methods, and the subscriber seems to be working fine as far as getting messages that it subcribes for.  

what does setJMSCorrelationID and setClientID

Java is a platform-independent, object-oriented programming language and run-time environment, designed to have as few implementation dependencies as possible such that developers can write one set of code across all platforms using libraries. Most devices will not run Java natively, and require a run-time component to be installed in order to execute a Java program.