docx4j doesn't work on Google App Engine

[ehinter]

It will run locally, but when you deploy it and try to run it there's this error:

Caused by: java.security.AccessControlException: access denied ("java.lang.RuntimePermission" "getClassLoader")
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:375)
at java.security.AccessController.checkPermission(AccessController.java:565)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:549)
at com.google.apphosting.runtime.security.CustomSecurityManager.checkPermission(CustomSecurityManager.java:56)
at java.lang.ClassLoader.checkClassLoaderPermission(ClassLoader.java:1556)
at java.lang.ClassLoader.getSystemClassLoader(ClassLoader.java:1475)
at org.docx4j.jaxb.Context.(Context.java:69)
... 67 more

I'm using version 3.0.0. Is there a workaround for this?

[plutext]

By way of general background, you may have seen http://www.docx4java.org/forums/docx-java-f6/docx4j-and-google-app-engine-gae-t775.html
and more importantly https://code.google.com/p/googleappengine/issues/detail?id=1267

But for your specific error, which relates to the getSystemClassLoader call at line 69, you should be able to simply delete the following lines from org.docx4j.jaxb.Context (or catch the AccessControlException)

    // This stuff is just debugging diagnostics
    searchManifestsForJAXBImplementationInfo( ClassLoader.getSystemClassLoader());
    if (Thread.currentThread().getContextClassLoader()==null) {
        log.warn("ContextClassLoader is null for current thread");
        // Happens with IKVM 
    } else if (ClassLoader.getSystemClassLoader()!=Thread.currentThread().getContextClassLoader()) {
        searchManifestsForJAXBImplementationInfo(Thread.currentThread().getContextClassLoader());
    }

[ehinter]

Hi,

Thanks for the reply. Yes, I found both of those other links but their issues were a bit different and neither really had a solution. I'll try commenting out the above lines but I was worried there would be other places that use the class loader that might cause a similar problem (e.g., line 122). I think ideally docx4j code should be modified to work on GAE out of the box if possible, but I'll see if commenting out the above lines works.

[ehinter]

Commenting out those lines fixed it, thanks.