org.aspectj/bcel-builder/testsrc/org/aspectj/apache/bcel/classfile/tests/NonCachingClassLoaderRepositoryTest.java

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package org.aspectj.apache.bcel.classfile.tests;

import java.util.ArrayList;
import java.util.List;

import junit.framework.TestCase;

import org.aspectj.apache.bcel.classfile.JavaClass;
import org.aspectj.apache.bcel.util.NonCachingClassLoaderRepository;

/**
 * @author Kristian Rosenvold
 */
public class NonCachingClassLoaderRepositoryTest extends TestCase {

	private final NonCachingClassLoaderRepository nonCachingClassLoaderRepository = new NonCachingClassLoaderRepository(
			NonCachingClassLoaderRepositoryTest.class.getClassLoader());

	protected void setUp() throws Exception {
		super.setUp();
	}

	abstract class DoneChecker implements Runnable {
		private volatile boolean success = false;
		private volatile boolean done = false;

		public boolean isSuccess() {
			return success;
		}

		public boolean isDone() {
			return done;
		}

		protected void setDone(boolean successFully) {
			success = successFully;
			done = true;
		}

		public abstract void run();
	}

	class Loader extends DoneChecker implements Runnable {
		public void run() {
			try {
				JavaClass javaClass = nonCachingClassLoaderRepository.loadClass(NonCachingClassLoaderRepositoryTest.class
						.getCanonicalName());
				nonCachingClassLoaderRepository.clear();
				setDone(true);
			} catch (Throwable e) {
				e.printStackTrace(System.out);
				setDone(false);
			}
		}
	}

	class Clearer extends DoneChecker implements Runnable {
		public void run() {
			try {
				nonCachingClassLoaderRepository.clear();
				setDone(true);
			} catch (Throwable e) {
				e.printStackTrace(System.out);
				setDone(false);
			}
		}
	}

	public void testConcurrency() throws ClassNotFoundException, InterruptedException {
		List<DoneChecker> loaders = new ArrayList<DoneChecker>();
		int i1 = 1000;
		for (int i = 0; i < i1; i++) {
			DoneChecker loader = new Loader();
			loaders.add(loader);
			new Thread(loader).start();
			DoneChecker clearer = new Clearer();
			loaders.add(clearer);
			new Thread(clearer).start();
		}

		for (int i = 0; i < i1 * 2; i++) {
			DoneChecker loader = loaders.get(i);
			while (!loader.isDone()) {
				Thread.sleep(10);
			}
			assertTrue("Loader " + i + " is supposed to run successfully", loader.isSuccess());
		}

	}

	protected void tearDown() throws Exception {
		super.tearDown();
	}

}