/*
* 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.accumulo.start.classloader.vfs;
import java.io.File;
import org.apache.commons.io.FileUtils;
import org.apache.commons.vfs2.FileObject;
import org.apache.commons.vfs2.FileSystemException;
import org.apache.commons.vfs2.FileSystemManager;
import org.apache.commons.vfs2.impl.VFSClassLoader;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
public class AccumuloReloadingVFSClassLoaderTest {
private TemporaryFolder folder1 = new TemporaryFolder(new File(System.getProperty("user.dir") + "/target"));
String folderPath;
private FileSystemManager vfs;
@Before
public void setup() throws Exception {
Logger.getRootLogger().setLevel(Level.ERROR);
vfs = ContextManagerTest.getVFS();
folder1.create();
folderPath = folder1.getRoot().toURI().toString() + ".*";
FileUtils.copyURLToFile(this.getClass().getResource("/HelloWorld.jar"), folder1.newFile("HelloWorld.jar"));
}
FileObject[] createFileSystems(FileObject[] fos) throws FileSystemException {
FileObject[] rfos = new FileObject[fos.length];
for (int i = 0; i < fos.length; i++) {
if (vfs.canCreateFileSystem(fos[i]))
rfos[i] = vfs.createFileSystem(fos[i]);
else
rfos[i] = fos[i];
}
return rfos;
}
@Test
public void testConstructor() throws Exception {
FileObject testDir = vfs.resolveFile(folder1.getRoot().toURI().toString());
FileObject[] dirContents = testDir.getChildren();
AccumuloReloadingVFSClassLoader arvcl = new AccumuloReloadingVFSClassLoader(folderPath, vfs, new ReloadingClassLoader() {
@Override
public ClassLoader getClassLoader() {
return ClassLoader.getSystemClassLoader();
}
}, true);
VFSClassLoader cl = (VFSClassLoader) arvcl.getClassLoader();
FileObject[] files = cl.getFileObjects();
Assert.assertArrayEquals(createFileSystems(dirContents), files);
arvcl.close();
}
@Test
public void testReloading() throws Exception {
FileObject testDir = vfs.resolveFile(folder1.getRoot().toURI().toString());
FileObject[] dirContents = testDir.getChildren();
AccumuloReloadingVFSClassLoader arvcl = new AccumuloReloadingVFSClassLoader(folderPath, vfs, new ReloadingClassLoader() {
@Override
public ClassLoader getClassLoader() {
return ClassLoader.getSystemClassLoader();
}
}, 1000, true);
FileObject[] files = ((VFSClassLoader) arvcl.getClassLoader()).getFileObjects();
Assert.assertArrayEquals(createFileSystems(dirContents), files);
Class<?> clazz1 = arvcl.getClassLoader().loadClass("test.HelloWorld");
Object o1 = clazz1.newInstance();
Assert.assertEquals("Hello World!", o1.toString());
// Check that the class is the same before the update
Class<?> clazz1_5 = arvcl.getClassLoader().loadClass("test.HelloWorld");
Assert.assertEquals(clazz1, clazz1_5);
new File(folder1.getRoot(), "HelloWorld.jar").delete();
// VFS-487 significantly wait to avoid failure
Thread.sleep(7000);
// Update the class
FileUtils.copyURLToFile(this.getClass().getResource("/HelloWorld.jar"), folder1.newFile("HelloWorld2.jar"));
// Wait for the monitor to notice
// VFS-487 significantly wait to avoid failure
Thread.sleep(7000);
Class<?> clazz2 = arvcl.getClassLoader().loadClass("test.HelloWorld");
Object o2 = clazz2.newInstance();
Assert.assertEquals("Hello World!", o2.toString());
// This is false because they are loaded by a different classloader
Assert.assertFalse(clazz1.equals(clazz2));
Assert.assertFalse(o1.equals(o2));
arvcl.close();
}
// This test fails because of an error with the underlying monitor (ACCUMULO-1507/VFS-487). Uncomment when this has been addressed.
//
// This is caused by the filed being deleted and then readded in the same monitor tick. This causes the file to ultimately register the deletion over any
// other events.
@Test @Ignore
public void testFastDeleteAndReAdd() throws Exception {
FileObject testDir = vfs.resolveFile(folder1.getRoot().toURI().toString());
FileObject[] dirContents = testDir.getChildren();
AccumuloReloadingVFSClassLoader arvcl = new AccumuloReloadingVFSClassLoader(folderPath, vfs, new ReloadingClassLoader() {
@Override
public ClassLoader getClassLoader() {
return ClassLoader.getSystemClassLoader();
}
}, 1000, true);
FileObject[] files = ((VFSClassLoader) arvcl.getClassLoader()).getFileObjects();
Assert.assertArrayEquals(createFileSystems(dirContents), files);
Class<?> clazz1 = arvcl.getClassLoader().loadClass("test.HelloWorld");
Object o1 = clazz1.newInstance();
Assert.assertEquals("Hello World!", o1.toString());
// Check that the class is the same before the update
Class<?> clazz1_5 = arvcl.getClassLoader().loadClass("test.HelloWorld");
Assert.assertEquals(clazz1, clazz1_5);
new File(folder1.getRoot(), "HelloWorld.jar").delete();
// Update the class
FileUtils.copyURLToFile(this.getClass().getResource("/HelloWorld.jar"), folder1.newFile("HelloWorld.jar"));
//Wait for the monitor to notice
// VFS-487 significantly wait to avoid failure
Thread.sleep(7000);
Class<?> clazz2 = arvcl.getClassLoader().loadClass("test.HelloWorld");
Object o2 = clazz2.newInstance();
Assert.assertEquals("Hello World!", o2.toString());
// This is false because they are loaded by a different classloader
Assert.assertFalse(clazz1.equals(clazz2));
Assert.assertFalse(o1.equals(o2));
arvcl.close();
}
@Test
public void testModifiedClass() throws Exception {
FileObject testDir = vfs.resolveFile(folder1.getRoot().toURI().toString());
FileObject[] dirContents = testDir.getChildren();
AccumuloReloadingVFSClassLoader arvcl = new AccumuloReloadingVFSClassLoader(folderPath, vfs, new ReloadingClassLoader() {
@Override
public ClassLoader getClassLoader() {
return ClassLoader.getSystemClassLoader();
}
}, 1000, true);
FileObject[] files = ((VFSClassLoader) arvcl.getClassLoader()).getFileObjects();
Assert.assertArrayEquals(createFileSystems(dirContents), files);
ClassLoader loader1 = arvcl.getClassLoader();
Class<?> clazz1 = loader1.loadClass("test.HelloWorld");
Object o1 = clazz1.newInstance();
Assert.assertEquals("Hello World!", o1.toString());
// Check that the class is the same before the update
Class<?> clazz1_5 = arvcl.getClassLoader().loadClass("test.HelloWorld");
Assert.assertEquals(clazz1, clazz1_5);
// java does aggressive caching of jar files. When using java code to read jar files that are created in the same second, it will only see the first jar
// file
Thread.sleep(1000);
new File(folder1.getRoot(), "HelloWorld.jar").delete();
// Update the class
FileUtils.copyURLToFile(this.getClass().getResource("/HelloWorld2.jar"), folder1.newFile("HelloWorld.jar"));
// Wait for the monitor to notice
// VFS-487 significantly wait to avoid failure
Thread.sleep(7000);
Class<?> clazz2 = arvcl.getClassLoader().loadClass("test.HelloWorld");
Object o2 = clazz2.newInstance();
Assert.assertEquals("Hallo Welt", o2.toString());
// This is false because they are loaded by a different classloader
Assert.assertFalse(clazz1.equals(clazz2));
Assert.assertFalse(o1.equals(o2));
Class<?> clazz3 = loader1.loadClass("test.HelloWorld");
Object o3 = clazz3.newInstance();
Assert.assertEquals("Hello World!", o3.toString());
arvcl.close();
}
@After
public void tearDown() throws Exception {
folder1.delete();
}
}