INTERVIEW QUESTIONS J2EE JMS DETAILS

Question: According to Section 3.4 of the JMS Specification, a client can effectively set only three of the message header fields. All the others are set either by the JMS provider or by the send or publish method. Why do all the fields have a setter method, when any client setting will be overridden when the message is sent or when the JMS provider delivers it? Wouldn't it make sense to allow only getter methods for most of the fields?

Answer: A: The specification requires setter methods mainly for consistency, so that each message header field has both a getter and setter method. Another reason is to allow a receiving client to change a field after a message is received but before it is passed to some other part of an application for processing. Although most setter methods are used very rarely, they are provided to give programmers flexibility.

A: The specification requires setter methods mainly for consistency, so that each message header field has both a getter and setter method. Another reason is to allow a receiving client to change a field after a message is received but before it is passed to some other part of an application for processing. Although most setter methods are used very rarely, they are provided to give programmers flexibility. Source: CoolInterview.com

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