org.powermock.classloading

Interface ClassloaderExecutor

All Known Implementing Classes:

AbstractClassloaderExecutor, SingleClassloaderExecutor

public interface ClassloaderExecutor

A ClassLoaderExecutor can run any code in any classloader. E.g. assume you have a classloader called myClassloader and you want to execute a (void) method called myMethod in myObject using this CL:

     SingleClassloaderExecutor cle = new SingleClassloaderExecutor(myClassloader);
     cle.execute(new Runnable() {
          public void run() {
             myObject.myMethod();
          }
     });
 

What happens is that the entire object graph of myObject is deep-cloned into the myClassloader classloader and then the myObject.myMethod() is executed.

You can also execute methods that return something:

     SingleClassloaderExecutor cle = new SingleClassloaderExecutor(myClassloader);
     MyResult result = cle.execute(new Callable() {
          public MyResult call() throws Exception {
             return myObject.myMethod();
          }
     });
 

Here we imagine that myObject.myMethod() returns an object of type MyResult. Again the entire state will be deep-cloned to myClassloader and then the myObject.myMethod() is executed. The result of the method call is deep-cloned back into the original classloader (the one that made the call to cle.execute(..)) and is ready for use.

Note that the SingleClassloaderExecutor requires a deep cloner implementing the DeepClonerSPI present in the class-path.

Method Summary

Modifier and Type	Method and Description
<T> T	execute(java.util.concurrent.Callable<T> callable)
void	execute(java.lang.Runnable runnable)

Method Detail

execute

<T> T execute(java.util.concurrent.Callable<T> callable)

execute

void execute(java.lang.Runnable runnable)