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From Elvis Stansvik <elvst...@gmail.com>
Subject Re: Composite destinations in old style ActiveMQ Spring configuration
Date Fri, 05 Jul 2013 13:34:52 GMT
With some help from dejanb on IRC I figured it out. It was a simple matter
of passing "${jms.queue.audit},my_new_queue" as defaultDestinationName of
the JmsTemplate, so much easier than I thought :)

Best regards,
Elvis Stansvik

2013/7/4 Elvis Stansvik <elvstone@gmail.com>

> Hi everyone,
>
> I've recently been tasked with writing an application that should receive
> messages from an existing Spring application (a game server) that uses
> ActiveMQ. The game server currently sends messages on a queue called
> ${jms.queue.audit}, from which another application (called the "auditor")
> receives.
>
> What I need to do is configure a new queue, parallell to the
> ${jms.queue.audit} queue, from which my new application can receive. The
> new application should receive exactly the same messages as the auditor.
>
> Since I'm new to both Spring, JMS and ActiveMQ, I first felt a bit lost.
> But I understand that what I need to is probably to configure a composite
> destination [1], let's call it ${jms.queue.game_events}, which fans out
> into two separate queues ${jms.queue.audit} and ${jms.queue.new_queue}.
> E.g. like this:
>
> ${jms.queue.game_events} ----> ${jms.queue.new_queue}
>                      |
>                      v
>      ${jms.queue.audit}
>
> I'd then reconfigure the game server to send messages on the virtual queue
> ${jms.queue.game_events}, and they would be delivered both to my new
> application and to the auditor.
>
> Looking at the relevant section of the Spring XML configuration for the
> game server, it looks like:
>
> <!-- JMS Configuration -->
>
> <bean id="jmsFailoverConnectionFactory"
> class="org.apache.activemq.ActiveMQConnectionFactory">
> <property name="brokerURL" value="failover:tcp://${jms.host}:${jms.port}"/>
>  <property name="copyMessageOnSend" value="false"/>
> </bean>
>
>  <bean id="jmsConnectionFactory"
> class="org.apache.activemq.ActiveMQConnectionFactory">
> <property name="brokerURL" value="tcp://${jms.host}:${jms.port}"/>
>  <property name="copyMessageOnSend" value="false"/>
> </bean>
>
>  <!-- JVM Dispatch Bridge Broker -->
>
> <bean id="jvmBroker" class="org.apache.activemq.broker.BrokerService"
> init-method="start" destroy-method="stop">
>  <property name="persistent" value="true"/>
> <property name="dataDirectory" value="${broker.store}"/>
>  <property name="transportConnectorURIs">
> <list>
> <value>vm://localhost</value>
>  </list>
> </property>
> <property name="useJmx" value="false"/>
>  <property name="jmsBridgeConnectors">
> <list>
> <bean class="org.apache.activemq.network.jms.JmsQueueConnector">
>  <property name="outboundQueueConnectionFactory"
> ref="jmsFailoverConnectionFactory"/>
> <property name="outboundQueueBridges">
>  <list>
> <!-- audit -->
> <bean class="org.apache.activemq.network.jms.OutboundQueueBridge">
>  <constructor-arg value="${jms.queue.audit}"/>
> </bean>
> <!-- generic history -->
>  <bean class="org.apache.activemq.network.jms.OutboundQueueBridge">
> <constructor-arg value="${jms.queue.generichistory}"/>
>  </bean>
> </list>
> </property>
>  </bean>
> </list>
> </property>
>  </bean>
>
> <bean id="jvmConnectionFactory"
> class="org.apache.activemq.ActiveMQConnectionFactory">
>  <property name="brokerURL" value="vm://localhost"/>
> <property name="copyMessageOnSend" value="false"/>
>  </bean>
>
> <!-- Audit Factory -->
>
> <bean id="auditFactory"
> class="com.straycatstudios.wsc.server.framework.audit.JmsAuditFactory"
>   depends-on="jvmBroker">
> <constructor-arg index="0">
> <bean class="com.straycatstudios.wsc.common.spring.messaging.JmsSender">
>  <constructor-arg>
> <bean class="org.springframework.jms.core.JmsTemplate">
>  <property name="connectionFactory" ref="jvmConnectionFactory"/>
> <property name="defaultDestinationName" value="${jms.queue.audit}"/>
>  <property name="messageConverter">
> <bean
> class="com.straycatstudios.wsc.server.framework.audit.EventMessageConverter">
>  <constructor-arg index="0" ref="simpleMessageConverter"/>
> </bean>
>  </property>
> </bean>
> </constructor-arg>
>  </bean>
> </constructor-arg>
> </bean>
>
> So it looks like it is using standard beans to set up the BrokerService
> and other ActiveMQ stuff, instead of using the new style of embedding
> ActiveMQ XML configuration inside the Spring XML. The JmsAuditFactory is
> the class that does the sending, taking a JmsSender as constructor argument.
>
> So finally, my question is: How I would go about setting up this composite
> destination with a minimal amount of modifications to the Spring XML
> configuration? The
>
> The example at [1] only shows how to do it with the new approach of Spring
> configuration, but I'd rather not do invasive things such as converting the
> whole thing to the new embedded style, as I'm afraid I'd screw things up.
>
> Very grateful for any tips/pointers on how to proceed. The full Spring
> configuration of the game server is at http://paste.kde.org/789248/raw/ ,
> in case the above paste is not enough (or mangled).
>
> Best regards,
> Elvis Stansvik
>
> [1]
> http://activemq.apache.org/virtual-destinations.html#VirtualDestinations-CompositeDestinations
>

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