A durable subscriber is an MDB that will receive its messages even if it goes down. To make a MDB into a durable subscriber, you need to add a couple of lines to the ejb-jar.xml and weblogic-ejb-jar.xml.
The Ejb-Jar
<?xml version="1.0" encoding="UTF-8"?>
<ejb-jar id="ejb-jar_ID" version="2.1" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/ejb-jar_2_1.xsd">
<display-name>Event Logging Component</display-name>
<enterprise-beans>
<message-driven>
<ejb-name>EventLoggingMDB</ejb-name>
<ejb-class>uk.gov.hmrc.candi.service.ejb.EventLoggingMDB</ejb-class>
<transaction-type>Container</transaction-type>
<message-destination-type>javax.jms.Topic</message-destination-type>
<activation-config>
<activation-config-property>
<activation-config-property-name>subscriptionDurability</activation-config-property-name>
<activation-config-property-value>Durable</activation-config-property-value>
</activation-config-property>
</activation-config>
</message-driven>
</enterprise-beans>
<assembly-descriptor>
<container-transaction>
<method>
<ejb-name>EventLoggingMDB</ejb-name>
<method-name>*</method-name>
</method>
<trans-attribute>Required</trans-attribute>
</container-transaction>
</assembly-descriptor>
</ejb-jar>
The Weblogic-Ejb-Jar
<?xml version="1.0" encoding="UTF-8" ?>
<weblogic-ejb-jar xmlns="http://www.bea.com/ns/weblogic/10.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.bea.com/ns/weblogic/10.0 http://www.bea.com/ns/weblogic/10.0/weblogic-ejb-jar.xsd">
<weblogic-enterprise-bean>
<ejb-name>EventLoggingMDB</ejb-name>
<message-driven-descriptor>
<pool>
<max-beans-in-free-pool>1</max-beans-in-free-pool>
<initial-beans-in-free-pool>1</initial-beans-in-free-pool>
</pool>
<destination-jndi-name>EventTopic</destination-jndi-name>
<connection-factory-jndi-name>weblogic.jms.XAConnectionFactory</connection-factory-jndi-name>
<jms-client-id>EventLoggingClient</jms-client-id>
<max-messages-in-transaction>1</max-messages-in-transaction>
</message-driven-descriptor>
</weblogic-enterprise-bean>
</weblogic-ejb-jar>
