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Change "maxSession" ActivationConfigProperty dynamically on MDB
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created by <a href="https://community.jboss.org/people/hushen.savani">Hushen Savani</a> in <i>EJB3</i> - <a href="https://community.jboss.org/message/649827#649827">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi Community,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>     I am using JBossAS-5.1.0.GA with HornetQ-2.2.5.Final. I am using Message Driven Beans in my application. I wanted to configure MDBs maxSession and maxPoolSize configurable instead of hardcoding inside the code. So, I have converted my MDB to AspectDomain and configured parameters in *-aop.xml. Following is my sample-aop.xml file:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="text-decoration: underline;"><strong>sample-aop.xml</strong></span>: </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code jive-xml"><span class="jive-xml-tag"><?xml version="1.0" encoding="UTF-8"?></span>
<span class="jive-xml-tag"><aop xmlns="urn:jboss:aop-beans:1.0"></span>
 
   <span class="jive-xml-tag"><domain name="ProcessingEntitiesQueueListenerMDB" extends="Message Driven Bean" inheritBindings="true"></span>
      <span class="jive-xml-tag"><annotation expr="!class(@org.jboss.ejb3.annotation.DefaultActivationSpecs)"></span>
         @org.jboss.ejb3.annotation.DefaultActivationSpecs (value={@javax.ejb.ActivationConfigProperty(propertyName=<span class="jive-xml-quote">destinationType</span>, propertyValue=<span class="jive-xml-quote">javax.jms.Queue</span>), @javax.ejb.ActivationConfigProperty(propertyName=<span class="jive-xml-quote">destination</span>, propertyValue=<span class="jive-xml-quote">queue/mocmProcessingQueue</span>), @javax.ejb.ActivationConfigProperty(propertyName=<span class="jive-xml-quote">maxSession</span>, propertyValue=<span class="jive-xml-quote">30</span>)})
      <span class="jive-xml-tag"></annotation></span>
 
     <span class="jive-xml-tag"><annotation expr="class(*) AND !class(@org.jboss.ejb3.annotation.Pool)"></span>
         @org.jboss.ejb3.annotation.Pool (value=<span class="jive-xml-quote">StrictMaxPool</span>, maxSize=30, timeout=1000000)
      <span class="jive-xml-tag"></annotation></span>
   <span class="jive-xml-tag"></domain></span>
<span class="jive-xml-tag"><domain name="HornetQSessionBean" extends="Stateless Bean" inheritBindings="true"></span>
      <span class="jive-xml-tag"><annotation expr="!class(@org.jboss.annotation.ejb.PoolClass)"></span>
          @org.jboss.annotation.ejb.PoolClass (value=org.jboss.ejb3.StrictMaxPool.class, maxSize=20000, timeout=10000)
      <span class="jive-xml-tag"></annotation></span>
   <span class="jive-xml-tag"></domain></span>
<span class="jive-xml-tag"></aop></span>
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="text-decoration: underline;"><strong>And My Message Driven Bean is as following</strong></span>:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code jive-java">@MessageDriven
@AspectDomain(<font color="red">"ProcessingEntitiesQueueListenerMDB"</font>)
@TransactionManagement(value= TransactionManagementType.CONTAINER)
@TransactionAttribute(value= TransactionAttributeType.NOT_SUPPORTED)
@ResourceAdapter(<font color="red">"hornetq-ra.rar"</font>)
<font color="navy"><b>public</b></font> <font color="navy"><b>class</b></font> ProcessingEntitiesQueueListenerMDB <font color="navy"><b>implements</b></font> MessageListener <font color="navy">{</font>
     ......
     ......
     .....
<font color="navy">}</font>
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>After deploying the sample-aop.xml, I am able to control these parameters as per I configure.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Now, what happens here is that, if I chage maxSession/max Pool size equals to 40 from 30 on runtime, the changes are not reflected dynamically. Hence, I tried redeploying sample-aop.xml on runtime. But again, new values to these parameters are not bound to my MDB on runtime. </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Pl. suggest some pointers on the same to change these binding dynamically on runtime.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thank you.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Best Regards,</p><p> Hushen Savani</p></div>
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