/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.jci;
import java.io.File;
import org.apache.commons.io.FileUtils;
import org.apache.commons.jci.classes.ExtendedDump;
import org.apache.commons.jci.classes.SimpleDump;
import org.apache.commons.jci.compilers.CompilationResult;
import org.apache.commons.jci.compilers.JavaCompiler;
import org.apache.commons.jci.compilers.JavaCompilerSettings;
import org.apache.commons.jci.listeners.CompilingListener;
import org.apache.commons.jci.monitor.FilesystemAlterationMonitor;
import org.apache.commons.jci.problems.CompilationProblem;
import org.apache.commons.jci.problems.CompilationProblemHandler;
import org.apache.commons.jci.readers.ResourceReader;
import org.apache.commons.jci.stores.ResourceStore;
import org.apache.commons.jci.utils.ConversionUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
*
* @author tcurdt
*/
public final class CompilingClassLoaderTestCase extends AbstractTestCase {
private final Log log = LogFactory.getLog(CompilingClassLoaderTestCase.class);
private ReloadingClassLoader classloader;
private CompilingListener listener;
private FilesystemAlterationMonitor fam;
private final static class MockJavaCompiler implements JavaCompiler {
private final Log log = LogFactory.getLog(MockJavaCompiler.class);
public CompilationResult compile(String[] pResourcePaths, ResourceReader pReader, ResourceStore pStore, ClassLoader pClassLoader, JavaCompilerSettings pSettings ) {
for (int i = 0; i < pResourcePaths.length; i++) {
final String resourcePath = pResourcePaths[i];
final byte[] resourceContent = pReader.getBytes(resourcePath);
log.debug("resource " + resourcePath + " = " + ((resourceContent!=null)?new String(resourceContent):null) );
final byte[] data;
if ("jci/Simple.java".equals(resourcePath)) {
try {
data = SimpleDump.dump(new String(resourceContent));
} catch (Exception e) {
throw new RuntimeException("cannot handle resource " + resourcePath, e);
}
} else if ("jci/Extended.java".equals(resourcePath)) {
try {
data = ExtendedDump.dump();
} catch (Exception e) {
throw new RuntimeException("cannot handle resource " + resourcePath, e);
}
} else {
throw new RuntimeException("cannot handle resource " + resourcePath);
}
log.debug("compiling " + resourcePath + " (" + data.length + ")");
pStore.write(ConversionUtils.stripExtension(resourcePath) + ".class", data);
}
return new CompilationResult(new CompilationProblem[0]);
}
public CompilationResult compile(String[] pResourcePaths, ResourceReader pReader, ResourceStore pStore, ClassLoader pClassLoader) {
return compile(pResourcePaths, pReader, pStore, pClassLoader, null);
}
public CompilationResult compile(String[] pResourcePaths, ResourceReader pReader, ResourceStore pStore) {
return compile(pResourcePaths, pReader, pStore, null);
}
public void setCompilationProblemHandler(CompilationProblemHandler pHandler) {
}
public JavaCompilerSettings createDefaultSettings() {
return null;
}
}
@Override
protected void setUp() throws Exception {
super.setUp();
classloader = new ReloadingClassLoader(this.getClass().getClassLoader());
listener = new CompilingListener(new MockJavaCompiler());
listener.addReloadNotificationListener(classloader);
fam = new FilesystemAlterationMonitor();
fam.addListener(directory, listener);
fam.start();
}
private void initialCompile() throws Exception {
log.debug("initial compile");
listener.waitForFirstCheck();
writeFile("jci/Simple.java", "Simple1");
writeFile("jci/Extended.java", "Extended");
log.debug("waiting for compile changes to get applied");
listener.waitForCheck();
log.debug("*** ready to test");
}
public void testCreate() throws Exception {
initialCompile();
log.debug("loading Simple");
final Object simple = classloader.loadClass("jci.Simple").newInstance();
assertEquals("Simple1", simple.toString());
log.debug("loading Extended");
final Object extended = classloader.loadClass("jci.Extended").newInstance();
assertEquals("Extended:Simple1", extended.toString());
}
public void testChange() throws Exception {
initialCompile();
final Object simple = classloader.loadClass("jci.Simple").newInstance();
assertEquals("Simple1", simple.toString());
final Object extended = classloader.loadClass("jci.Extended").newInstance();
assertEquals("Extended:Simple1", extended.toString());
delay();
writeFile("jci/Simple.java", "Simple2");
listener.waitForCheck();
final Object simple2 = classloader.loadClass("jci.Simple").newInstance();
assertEquals("Simple2", simple2.toString());
final Object newExtended = classloader.loadClass("jci.Extended").newInstance();
assertEquals("Extended:Simple2", newExtended.toString());
}
public void testDelete() throws Exception {
initialCompile();
final Object simple = classloader.loadClass("jci.Simple").newInstance();
assertEquals("Simple1", simple.toString());
final Object extended = classloader.loadClass("jci.Extended").newInstance();
assertEquals("Extended:Simple1", extended.toString());
listener.waitForCheck();
log.debug("deleting source file");
assertTrue(new File(directory, "jci/Extended.java").delete());
listener.waitForCheck();
log.debug("loading Simple");
final Object oldSimple = classloader.loadClass("jci.Simple").newInstance();
assertEquals("Simple1", oldSimple.toString());
log.debug("trying to loading Extended");
try {
classloader.loadClass("jci.Extended").newInstance();
fail();
} catch(final ClassNotFoundException e) {
assertEquals("jci.Extended", e.getMessage());
}
log.debug("deleting whole directory");
FileUtils.deleteDirectory(new File(directory, "jci"));
listener.waitForCheck();
log.debug("trying to loading Simple");
try {
classloader.loadClass("jci.Simple").newInstance();
fail();
} catch(final ClassNotFoundException e) {
assertEquals("jci.Simple", e.getMessage());
}
}
public void testDeleteDependency() throws Exception {
initialCompile();
final Object simple = classloader.loadClass("jci.Simple").newInstance();
assertEquals("Simple1", simple.toString());
final Object extended = classloader.loadClass("jci.Extended").newInstance();
assertEquals("Extended:Simple1", extended.toString());
log.debug("deleting source file");
assertTrue(new File(directory, "jci/Simple.java").delete());
listener.waitForCheck();
log.debug("trying to load dependend class");
try {
classloader.loadClass("jci.Extended").newInstance();
fail();
} catch(final NoClassDefFoundError e) {
assertEquals("jci/Simple", e.getMessage());
}
}
@Override
protected void tearDown() throws Exception {
fam.removeListener(listener);
fam.stop();
super.tearDown();
}
}