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| Apache ActiveMQ ™ -- Delete Inactive Destinations |
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| <div class="wiki-content maincontent"><div class="confluence-information-macro confluence-information-macro-information"><p class="title">Inactive Destination</p><span class="aui-icon aui-icon-small aui-iconfont-info confluence-information-macro-icon"></span><div class="confluence-information-macro-body">An 'inactive' destination is one that has had no messages pending and no consumers connected for some configured period of time.</div></div><div class="confluence-information-macro confluence-information-macro-information"><span class="aui-icon aui-icon-small aui-iconfont-info confluence-information-macro-icon"></span><div class="confluence-information-macro-body">By default the broker does <em>not</em> check for inactive destinations. This as governed by the default values for the following options: <strong><code>schedulePeriodForDestinationPurge="0"</code></strong> and <strong><code>gcInactiveDestinations="false"</code></strong>.</div></div><p>However, the broker can be configured to purge inactive destinations. To do so requires using specially configured destination policy entries in combination with the broker attribute: <strong><code>schedulePeriodForDestinationPurge > 0</code></strong>.</p><p>Example:</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeContent panelContent pdl"> |
| <pre class="brush: xml; gutter: false; theme: Default" style="font-size:12px;"><broker xmlns="http://activemq.apache.org/schema/core" schedulePeriodForDestinationPurge="10000"> |
| |
| <destinationPolicy> |
| <policyMap> |
| <policyEntries> |
| <policyEntry queue=">" gcInactiveDestinations="true" inactiveTimoutBeforeGC="30000"/> |
| </policyEntries> |
| </policyMap> |
| </destinationPolicy> |
| |
| </broker></pre> |
| </div></div><p>In this example the broker will check for inactive destinations every <strong><code>10</code></strong> seconds, as determined by <strong><code>schedulePeriodForDestinationPurge="10000"</code></strong>. When a destination purge is triggered the broker will delete any queue that has been empty for longer than <strong><code>inactiveTimoutBeforeGC="30000"</code></strong> milliseconds (default: <strong><code>60000</code></strong> milliseconds) and for which <strong><code>gcInactiveDestinations="true"</code></strong> is set on its corresponding destination policy entry.</p><p>When a destination is removed the broker will log a message like:</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeContent panelContent pdl"> |
| <pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">INFO Queue - TEST.QUEUE Inactive for longer than 30000 ms - removing ...</pre> |
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