How do I configure a automatic expiration for DLQ

[gchakra]

1.For the dead letter queue ActiveMQ.DLQ, I would like to configure a policy
whereby messages in DLQ get deleted after they have resided in DLQ for 5
days.
I couldnt see how to do it in the documentation.
My current activemq.xml configuration file is below...how do I modify it for
autoexpiring my DLQ messages after 5 days...


<beans xmlns="http://www.springframework.org/schema/beans";
xmlns:amq="http://activemq.apache.org/schema/core";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://activemq.apache.org/schema/core
http://activemq.apache.org/schema/core/activemq-core.xsd";>
        <bean
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
                <property name="locations">
                        
<value>file:${activemq.base}/conf/credentials.properties</value>
                </property>
        </bean>
        <broker xmlns="http://activemq.apache.org/schema/core";
brokerName="localhost" dataDirectory="${activemq.base}/data"
destroyApplicationContextOnStop="true">
                <destinationPolicy>
                        <policyMap>
                                <policyEntries>
                                        <policyEntry topic=">" 
producerFlowControl="false" memoryLimit="1mb"
useCache="false">
                                                <pendingSubscriberPolicy>
                                                        <vmCursor />
                                                </pendingSubscriberPolicy>
                                        </policyEntry>
                                        <policyEntry queue=">" 
producerFlowControl="false" memoryLimit="1mb"
useCache="false">
                                                <dispatchPolicy>
                                                        
<roundRobinDispatchPolicy />
                                                </dispatchPolicy>
                                        </policyEntry>
                                </policyEntries>
                        </policyMap>
                </destinationPolicy>
                <managementContext>
                        <managementContext createConnector="false"/>
                </managementContext>
                <persistenceAdapter>
                        <kahaDB directory="${activemq.base}/data/kahadb"
ignoreMissingJournalfiles="true" checkForCorruptJournalFiles="true"
checksumJournalFiles="true" journalMaxFileLength="64mb" />
                </persistenceAdapter>
                <transportConnectors>
                        <transportConnector name="openwire" 
uri="tcp://0.0.0.0:61616"/>
                </transportConnectors>
        </broker>
        <import resource="jetty.xml"/>
</beans>


2. What is the impact of adding the following plugin to the broker in
activemq.xml configuration XML
<broker xmlns="http://activemq.apache.org/schema/core";
brokerName="localhost" dataDirectory="$
{activemq.base}/data" destroyApplicationContextOnStop="true">
<plugins>
<discardingDLQBrokerPlugin dropAll="true" dropTemporaryTopics="true"
dropTemporaryQueues="true" />
</plugins>
</broker>





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