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From "Filip Hanik (JIRA)" <j...@apache.org>
Subject [jira] Created: (AMQ-1892) Broker plugin to allow automatic discarding of the items being sent to the dead letter queue
Date Fri, 15 Aug 2008 22:41:52 GMT
Broker plugin to allow automatic discarding of the items being sent to the dead letter queue
--------------------------------------------------------------------------------------------

                 Key: AMQ-1892
                 URL: https://issues.apache.org/activemq/browse/AMQ-1892
             Project: ActiveMQ
          Issue Type: New Feature
          Components: Broker
    Affects Versions: 5.1.0, 5.0.0
            Reporter: Filip Hanik
             Fix For: 5.2.0
         Attachments: discarding-dlq-plugin.zip

A very simple, yet very useful plugin to the broker. This allows one to configure queues and
topics, all or matched based on regular expressions, to drop messages being sent to the DLQ

extremely useful when one uses constant pending message limit strategy or the other eviction
rules, but don't want to incur the overhead of yet another consumer to clear the DLQ

Configuration looks like

     <plugins>
       <bean
         xmlns="http://www.springframework.org/schema/beans"
         id="discardingDlqBroker"
         class="org.apache.activemq.plugin.DiscardingDLQBroker">
 
         <property name="dropAll" value="true"/>
         <property name="dropTemporaryTopics" value="true"/>
         <property name="dropTemporaryQueues" value="true"/>
 
         <!--drops by destination name, using java regular expressions
             http://java.sun.com/j2se/1.5.0/docs/api/java/util/regex/Pattern.html
             delimited by spaces, so destination names cannot contain spaces
         <property name="dropOnly" value="topic_1 queue_1"/>
         -->
 
         <!--how frequently do we output how many messages we have dropped - use 0 for
disable-->
         <property name="reportInterval" value="1000"/>
       </bean>
     </plugins>


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