ADF Bindings are corrupted when non-ADF Bound resource is referenced first

I have an application that uses ADF BC binding on JSF pages. I recently wrote an image servlet which pulls an image out of the DB and writes it back to the response (so that it can be referenced in an <img> tag, for example). I wrote it to use BC4J to fetch the image BLOB, but it does not reference any page bindings. I use the following to get the app module:
        ImageAmImpl imageAm = (ImageAmImpl) Configuration
          .createRootApplicationModule( "myTestPackage.ImageAm",
                                        "ImageAmLocal" );and the following in a finally block at the end to release it:
        Configuration.releaseRootApplicationModule( imageAm, true );In debugging the image servlet I found that if I hit the image servlet before anything else, my data bindings for other pages appeared to be corrupted.
For example:
Server starts
Then I go to http://127.0.0.1:7101/myApp/imageServlet?imageId=760
Then I go to http://127.0.0.1:7101/myApp/faces/testListPage.jspx which contains an ADF data bound table, and the table is empty.
Similarly:
Server starts
Then I go to http://127.0.0.1:7101/myApp/faces/testListPage.jspx and the table is populated fine.
Then I go to http://127.0.0.1:7101/myApp/imageServlet?imageId=760
I then go back to the table, it’s still populated, but I then have an edit button allowing me to edit an item in the table and my LOV drop down lists (based on ADF bindings) are not populated.
After doing some poking around in web.xml, I realized that only the faces servlet was behind the oracle.adf.model.servlet.ADFBindingFilter. I put the imageServlet behind this filter and everything is working fine now. I’m at a bit of a loss, though, as to why this works. I would expect the binding filter to only be required for resources that access ADF bindings, and the image servlet does not … it operates directly on a checked out app module. While the problem appears to be resolved, I'd like to have a better understanding of why it was broken in the first place and why putting the image servlet behind the ADF Binding filter fixed it.

As far as I can understand, Configuration.createRootApplicationModule() should not be used. This method call is intended for use in an unmanaged mode, i.e. Java client.
Check-out some of the following:
Check Your App for Misuse of Configuration.createRootApplicationModule()
When should I use Configuration.createRootApplicationModule(), and when not?
Regards,
Nick
Edited by: Nick Haralabidis on May 18, 2010 12:15 PM

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