Backing file init method always called for proxy portlets

Hello,
We are currently using Weblogic Portal 10 MP1. Deployed within our Portal EAR is a local proxy portlet and attached to this proxy portlet is a backing file, which currently implements the init() and prerender() methods from the backing interface.
When this is placed in a page that is within a desktop, the init() method is always invoked no matter which page you access within the desktop. As I understand it from the documentation, if you have "tree optimization" turned on, then the init() method will only be called when rendering the actual page the proxy portlet is in. But this doesn't seem to be the case. However, if I define a standard Java portlet within the EAR and attach a backing file, then the init() follows the rules when tree optimization is turned on or off.
Does anyone know if this is a defect within the portal framework, or is this expected and proxy portlets do not follow this rule?
And I guess, if it is a defect or known limitation, is there a possible workaround? I assume the simplest workaround will be to move the logic into the prerender() method.
Regards,
Jonathan

Hello Jonathan,
Tree optimization is a tricky thing- some portlets may still be initialized even when the page they are on isn't visible. The rules for which get initialized and which don't are very complicated and depend on a number of things, so it is just best to not rely on the init() method not getting called.
By far the best option for your use-case is to have the proxy portlet listen to the "onRefresh" event, and move the logic from the backing file's init() method into an event-handling method in the backing file, then have this method called when the refresh event is received. Here's a sample portion of the .portlet file for doing this:
<netuix:handlePortalEvent event="onRefresh" eventLabel="onRefreshEvent">
<netuix:invokeBackingFileMethod method="handleRefreshEvent"/>
</netuix:handlePortalEvent>The "onRefresh" event is sent to the portlet only when it is visible on the page, so it should work perfectly for your use-case.
Kevin

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** (I am using Websphere)**_

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