Integration with Guice?

[mumrah]

Any idea how this would play with Guice?

[mumrah]

Bump?

[mumrah]

Answering my own question here. It's actually fairly straightforward to use this with Guice. Instead of using JclObjectFactory to create objects, you simply bind the classes loaded by JCL into Guice.

Suppose you have SomeInterface in the system classpath, and SomeImpl in a jar to be loaded by JCL.

JarClassLoader jcl = new JarClassLoader();
jcl.add("some.jar");
Class<SomeInterface> clazz = (Class<SomeInterface>)jcl.loadClass("SomeImpl");
Injector injector = Guice.createInjector(new AbstractModule() {
    @Override
    protected void configure() {
      bind(SomeInterface.class).to(clazz);
    }
});

SomeInterface something = injector.getInstance(SomeInterface.class); // This returns SomeImpl

The trick is that SomeInterface cannot be in "some.jar" (or Guice for that matter). This makes it a bit tricky to organize your dependencies, but you should be able to use a "provided" scope in your build tool to ensure some.jar (or a directory of jars) does not include classes that will be loaded by the main (non-JCL) classloader.

[mumrah]

I've made a sample project showing this in more detail here: https://github.com/mumrah/guice-jcl

[kamranzafar]

great stuff.. apologies for not replying to this thread earlier as I didn't get a chance to test jcl with guice. But your contribution is very helpful. Thanks