CRUDControllers in a module fail to render

[ianrae]

From the bottom up:

• play2-crud defines CRUDController
• my play module twixt (https://github.com/ianrae/twixt) defines TwixtController which extends CRUDController.
• my app (https://github.com/ianrae/m8) defines SampleController which extends TwixtController

m8 crashes, apparently confused where to look for sampleForm.scala.html. It exists in the app but play-crud perhaps is looking in twixt (since that's where the class that derived from CRUDController is.

java.lang.NoClassDefFoundError: views/html/SampleForm (wrong name: views/html/sa
mpleForm)
java.lang.NoClassDefFoundError: views/html/SampleForm (wrong name: views/html/sa
mpleForm)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:14
2)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:14
2)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at play.utils.crud.TemplateController.call(TemplateController.java:83)
at play.utils.crud.TemplateController.call(TemplateController.java:83)
at play.utils.dyn.DynamicCrudController.render(DynamicCrudController.jav
a:75)
at play.utils.dyn.DynamicCrudController.render(DynamicCrudController.jav
a:75)

---

NOTE. If I copy TwixtController up into the m8 app and derive SampleController from it, everything works fine.

[hakandilek]

Hi @ianrae,

can yo please provide a full sample under https://github.com/hakandilek/play2-crud/tree/master/samples to reproduce the problem.

I can try to identify the problem better then.

[ianrae]

I'm trying to figure out how to do that -- i think i need two github repos to do it :(

I found a workaround. In ClasspathScanningControllerRegistry.scanCrud(), add bulder.addUrls to add "org.mef.twixt" explicitly. Now all my controllers are seen. Not sure how to make this into a way that play2-crud can expose to library developers such as myself. Perhaps a value in the .conf file?

 ConfigurationBuilder builder = new ConfigurationBuilder().setUrls(
            ClasspathHelper.forPackage("", cls));
        builder.addUrls(ClasspathHelper.forPackage("org.mef.twixt"));

final Reflections reflections = new Reflections(builder.setScanners(new SubTypesScanner(),
            new TypeAnnotationsScanner()).addClassLoaders(cls));

[hakandilek]

instead of 2 repos you can create a branch.

[ianrae]

Hi Hakan. I have submitted a pull request with two projects that are in samples/issue54. Let me know what you think. Thanks.