Links User Guide Reference Apache Tomcat Development | The Apache Tomcat 5.5 Servlet/JSP ContainerMonitoring and Managing Tomcat| Introduction |
Monitoring is a very important question today. Looking inside the running
server, grab some statistic data or reconfigure some aspects are
daily administration tasks.
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| Manage Tomcat with JMX remote Ant Tasks |
To simplify JMX usage with Apache Ant 1.6.x, a set of tasks is provided
that may be used with antlib. The tasks can also be defined explicitly. An
Ant project that defines the tasks is provided and can be imported into
your project.
antlib support: Copy your catalina-ant.jar from $CATALINA_HOME/server/lib to $ANT_HOME/lib.
The following example shows the JMX Accessor usage:
<project name="Catalina Ant JMX"
xmlns:jmx="antlib:org.apache.catalina.ant.jmx"
default="state"
basedir=".">
<property name="jmx.server.name" value="localhost" />
<property name="jmx.server.port" value="9012" />
<property name="cluster.server.address" value="192.168.1.75" />
<property name="cluster.server.port" value="9025" />
<target name="state" description="Show JMX Cluster state">
<jmx:open
host="${jmx.server.name}"
port="${jmx.server.port}"
username="controlRole"
password="tomcat"/>
<jmx:get
name="Catalina:type=IDataSender,host=localhost,senderAddress=${cluster.server.address},senderPort=${cluster.server.port}"
attribute="connected"
resultproperty="IDataSender.backup.connected"
echo="false"
/>
<jmx:get
name="Catalina:type=ClusterSender,host=localhost"
attribute="senderObjectNames"
resultproperty="senderObjectNames"
echo="false"
/>
<!-- get current maxActiveSession from ClusterTest application
echo it to ant output and store at
property <em>clustertest.maxActiveSessions.orginal</em>
-->
<jmx:get
name="Catalina:type=Manager,path=/ClusterTest,host=localhost"
attribute="maxActiveSessions"
resultproperty="clustertest.maxActiveSessions.orginal"
echo="true"
/>
<!-- set maxActiveSession to 100
-->
<jmx:set
name="Catalina:type=Manager,path=/ClusterTest,host=localhost"
attribute="maxActiveSessions"
value="100"
type="int"
/>
<!-- get all sessions and split result as delimiter <em>SPACE</em> for easy
access all session ids directly with ant property sessions.[0..n].
-->
<jmx:invoke
name="Catalina:type=Manager,path=/ClusterTest,host=localhost"
operation="listSessionIds"
resultproperty="sessions"
echo="false"
delimiter=" "
/>
<!-- Access session attribute <em>Hello</em> from first session.
-->
<jmx:invoke
name="Catalina:type=Manager,path=/ClusterTest,host=localhost"
operation="getSessionAttribute"
resultproperty="Hello"
echo="false"
>
<arg value="${sessions.0}"/>
<arg value="Hello"/>
</jmx:invoke>
<!-- Query for all application manager.of the server from all hosts
and bind all attributes from all found manager mbeans.
-->
<jmx:query
name="Catalina:type=Manager,*"
resultproperty="manager"
echo="true"
attributebinding="true"
/>
<!-- echo the create properties -->
<echo>
senderObjectNames: ${senderObjectNames.0}
IDataSender.backup.connected: ${IDataSender.backup.connected}
session: ${sessions.0}
manager.length: ${manager.length}
manager.0.name: ${manager.0.name}
manager.1.name: ${manager.1.name}
hello: ${Hello}
manager.ClusterTest.0.name: ${manager.ClusterTest.0.name}
manager.ClusterTest.0.activeSessions: ${manager.ClusterTest.0.activeSessions}
manager.ClusterTest.0.counterSend_EVT_SESSION_EXPIRED: ${manager.ClusterTest.0.counterSend_EVT_SESSION_EXPIRED}
manager.ClusterTest.0.counterSend_EVT_GET_ALL_SESSIONS: ${manager.ClusterTest.0.counterSend_EVT_GET_ALL_SESSIONS}
</echo>
</target>
</project>
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import: Import the JMX Accessor Project with
<import file="${CATALINA.HOME}/bin/jmxaccessor-tasks.xml" /> and
reference the tasks with jmxOpen, jmxSet, jmxGet,
jmxQuery, jmxInvoke,jmxEquals and jmxCondition.
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