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Retrieve messages with maximum priority

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Hi All,
I need to retrieve messages from a queue with maximum priority. Hope i cannot set a MessageSelector query like this 'MAX(JMSPriority)'. Hence, i am creating two message consumers say consumerWithExpeditedPriority with MessageSelector string as 'JMSPriority > 4' and consumerWithNormalPriority with MessageSelector string as 'JMSPriority <= 4'.
First i am attempting to receive through the first consumer and if the message is null, i am trying out the second.
Is this the good way of implementation? Moreover, here i could classify only 2 levels of priority (normal and expedited) since i created two consumers. Actually, i needed all the 10 levels of JMSPriority to be handled out separately.

Please provide your valuable suggestions

Thanks and Regards,
Balaji N
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