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Code Block
xml
xml
<iPOJO xmlns:extender="org.apache.felix.ipojo.extender">
	<Component<component
		classNameclassname="org.apache.felix.ipojo.extender.myextender">
		
                <!—Extender-- Extender Pattern handler configuration -->
		<extender:extender 
                  extension="My-Extension"
                  onArrival="onBundleArrival" 
                  onDeparture="onBundleDeparture" 
                />

		<callback transition="invalidate" method="stopping" />
		<callback transition="validate" method="starting" />
		<provides />
	</Component>component>
</iPOJO>

Notice that, this handler is an external handler. So, it uses the "org.apache.felix.ipojo.extender" namespace.
Once described, you can implement your component. The methods specified methods will be called when a matching bundle arrives or leaves.
In the previous example, these methods could be:

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