[jboss-user] [JBoss Messaging] - Single MDB Instance Required
Hello community,
i am developing an Event Driven architecture using j2ee (MDB) on JBoss. In this
Architecture the incoming business events (raw events) will be fetched by a MDB, wich
forward the raw events to Event Stream Processor. My Problem is that JBoss instantiate
multiple instances of my MDB. It means the same event will be delivered repeatedly. I just
tried to force JBoss to limit the number of MDB instances. But it was useless. My
jboss.xml look like this:
<?xml version="1.0"?>
<!DOCTYPE jboss PUBLIC
"-//JBoss//DTD JBOSS 3.2//EN"
"http://www.jboss.org/j2ee/dtd/jboss_3_2.dtd">
<!-- The jboss.xml descriptor for the jrmp-comp.jar ejb unit -->
<enterprise-beans>
<message-driven>
<ejb-name>EventInputAdapterBean</ejb-name>
<destination-jndi-name>topic/rawEventTopic</destination-jndi-name>
<configuration-name>Standard Message Driven Bean</configuration-name>
<invoker-bindings>
<invoker-proxy-binding-name>event-message-driven-bean</invoker-proxy-binding-name>
</invoker-bindings>
</message-driven>
<message-driven>
<ejb-name>ComplexEventInputAdapterBean</ejb-name>
<destination-jndi-name>topic/complexEventTopic</destination-jndi-name>
<configuration-name>Standard Message Driven Bean</configuration-name>
<invoker-bindings>
<invoker-proxy-binding-name>event-message-driven-bean</invoker-proxy-binding-name>
</invoker-bindings>
</message-driven>
</enterprise-beans>
<invoker-proxy-bindings>
<invoker-proxy-binding>
event-message-driven-bean
<invoker-mbean>default</invoker-mbean>
<proxy-factory>org.jboss.ejb.plugins.jms.JMSContainerInvoker</proxy-factory>
<proxy-factory-config>
DefaultJMSProvider
StdJMSPool
1
1
10
queue/DLQ
10
0
</proxy-factory-config>
</invoker-proxy-binding>
</invoker-proxy-bindings>
i also made some changes in conf/jbossstandard.xml. The referenced configuration
"Standard Message Driven Bean" like following:
<container-configuration>
<container-name>Standard Message Driven Bean</container-name>
<call-logging>false</call-logging>
<invoker-proxy-binding-name>message-driven-bean</invoker-proxy-binding-name>
<container-interceptors>
org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor
org.jboss.ejb.plugins.LogInterceptor
org.jboss.ejb.plugins.RunAsSecurityInterceptor
<!-- CMT -->
org.jboss.ejb.plugins.TxInterceptorCMT
org.jboss.ejb.plugins.CallValidationInterceptor
org.jboss.ejb.plugins.MessageDrivenInstanceInterceptor
<!-- BMT -->
org.jboss.ejb.plugins.MessageDrivenInstanceInterceptor
org.jboss.ejb.plugins.MessageDrivenTxInterceptorBMT
org.jboss.ejb.plugins.CallValidationInterceptor
org.jboss.resource.connectionmanager.CachedConnectionInterceptor
</container-interceptors>
<instance-pool>org.jboss.ejb.plugins.MessageDrivenInstancePool</instance-pool>
<instance-cache></instance-cache>
<persistence-manager></persistence-manager>
<container-pool-conf>
1
true
</container-pool-conf>
</container-configuration>
can you please tell me, what my mistake is.
thanks
Saeed
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