1 Reply Latest reply on Mar 25, 2006 2:09 PM by kbillewicz

    Pooling and caching stateful session bean

    kbillewicz
    kbillewicz Mar 25, 2006 1:58 PM

      I would like to turn on pooling for my stateful session bean.

      When I'm trying to configure <container-configuration> with pooling but without cache I'm getting during bean deployment on server an error that <cache-policy-conf> is required.

      Whem I'm configuring cache, getting an exception (on the standalone client) during executing create() method on Home Interface:

      java.lang.NullPointerException
 at org.jboss.ejb.StatefulSessionContainer.createSession(StatefulSessionContainer.java:248)
 at org.jboss.ejb.StatefulSessionContainer.createHome(StatefulSessionContainer.java:323)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 ...
 at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:86)
 at $Proxy0.create(Unknown Source)
 at com.example.client.HelloClient.main(HelloClient.java:31)


      I have prepared config files as follows:

      ejb-jar.xml: 
      <enterprise-beans>

 <!-- Session Beans -->
 <session >
 <description><![CDATA[]]></description>
 <display-name>Hello</display-name>

 <ejb-name>Hello</ejb-name>

 <home>com.example.HelloHome</home>
 <remote>com.example.Hello</remote>
 <local-home>com.example.HelloLocalHome</local-home>
 <local>com.example.HelloLocal</local>
 <ejb-class>com.example.HelloBean</ejb-class>
 <session-type>Stateful</session-type>
 <transaction-type>Container</transaction-type>

 </session>
 ...


      jboss.xml: 
      <enterprise-beans>

 <session>
 <ejb-name>Hello</ejb-name>
 <jndi-name>ejb/Hello</jndi-name>
 <local-jndi-name>HelloLocal</local-jndi-name>
 <configuration-name>Hello</configuration-name>
 <method-attributes>
 </method-attributes>
 </session>
 </enterprise-beans>

 <container-configurations>
 <container-configuration>
 <container-name>Hello</container-name>
 <instance-pool>org.jboss.ejb.plugins.StatefulSessionInstancePool</instance-pool>
 <instance-cache>org.jboss.ejb.plugins.StatefulSessionInstanceCache</instance-cache>
 <persistence-manager>org.jboss.ejb.plugins.StatefulSessionFilePersistenceManager</persistence-manager>
 <container-pool-conf>
 <MaximumSize>3</MaximumSize>
 </container-pool-conf>
 <container-cache-conf>
 <cache-policy>org.jboss.ejb.plugins.LRUEnterpriseContextCachePolicy</cache-policy>
 <cache-policy-conf>
 <min-capacity>50</min-capacity>
 <max-capacity>1000000</max-capacity>
 <overager-period>300</overager-period>
 <max-bean-age>600</max-bean-age>
 <resizer-period>400</resizer-period>
 <max-cache-miss-period>60</max-cache-miss-period>
 <min-cache-miss-period>1</min-cache-miss-period>
 <cache-load-factor>0.75</cache-load-factor>
 </cache-policy-conf>
 </container-cache-conf>
 </container-configuration>
 </container-configurations>

 ...


      Have you any idea what can be wrong here? I had been working on it for several hours and haven't found any solution.

      Best regards,
      Konrad

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