example to set priority in message?

[Kannan]

I tried to set message priory like below mentioned code.  It didn’t work for
me.I am not sure what changes still needed to be done.


<route errorHandlerRef="deadLetterErrorHandler">
      <from ref="queue1" />
      <transacted ref="required" />
      <convertBodyTo type="com.domain.Message" />
      <choice>
        <when>
          <simple>${body.entity} is Foo</simple>
          <setHeader
headerName="JMSPriority"><constant>1</constant></setHeader>
          <to ref="olapQueue" />
        </when>
        <when>
          <simple>${body.entity} is Bar</simple>
          <setHeader
headerName="JMSPriority"><constant>2</constant></setHeader>
          <to ref="oltpQueue" />
        </when>
        <otherwise>
          <to ref="deadLetterQueue" />
        </otherwise>
      </choice>      
    </route>



<route errorHandlerRef="deadLetterErrorHandler">
      <from ref="queue1" />
       <resequence>
         <header>JMSPriority</header>        
         <to uri="mock:result" />
         <batch-config batchSize="300" batchTimeout="4000" />        
       </resequence>
      <choice>
        <when>
          <simple>${body} is Foo</simple>
          <bean ref="service" method="save" />
        </when>
        <when>
          <simple>${body.entity} is Bar</simple>
          <bean ref="userservice" method="update" />
        </when>
      </choice>
      <transacted ref="required" />
    </route>

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