Plugin usage from another plugin

Hi,

I'm writing my own plugin and would like to use the Monitoring Plugin from my plugin.

In my own java class:

import org.jivesoftware.openfire.plugin.MonitoringPlugin;

……..

MonitoringPlugin plugin = (MonitoringPlugin)XMPPServer.getInstance().getPluginManager().getPlugin("monito ring");

but during building with

ant -f build/build.xml -Dplugin=myPlugin plugin

I obtain:

[of.javac] /Volumes/Sources/Openfire/src/plugins/myPlugin/src/java/org/jivesoftware/openfi re/plugin/myPlugin/ServiceManager.java:25: error: cannot find symbol

[of.javac] import org.jivesoftware.openfire.plugin.MonitoringPlugin;

[of.javac]                                        ^

[of.javac]   symbol:   class MonitoringPlugin

[of.javac]   location: package org.jivesoftware.openfire.plugin