| /* |
| * Copyright 2001-2004 The Apache Software Foundation. |
| * |
| * Licensed 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.logging; |
| |
| import junit.framework.Test; |
| import junit.framework.TestCase; |
| import junit.framework.TestSuite; |
| |
| /** |
| * testcase to emulate container and application isolated from container |
| * @author baliuka |
| * @version $Id$ |
| */ |
| public class LoadTest extends TestCase{ |
| //TODO: need some way to add service provider packages |
| static private String LOG_PCKG[] = {"org.apache.commons.logging", |
| "org.apache.commons.logging.impl"}; |
| |
| static class AppClassLoader extends ClassLoader{ |
| |
| java.util.Map classes = new java.util.HashMap(); |
| |
| AppClassLoader(ClassLoader parent){ |
| super(parent); |
| } |
| |
| private Class def(String name)throws ClassNotFoundException{ |
| |
| Class result = (Class)classes.get(name); |
| if(result != null){ |
| return result; |
| } |
| |
| try{ |
| |
| java.io.InputStream is = this.getClass().getClassLoader(). |
| getResourceAsStream( name.replace('.','\\') + ".class" ); |
| java.io.ByteArrayOutputStream out = new java.io.ByteArrayOutputStream(); |
| |
| while(is.available() > 0){ |
| out.write(is.read()); |
| } |
| |
| byte data [] = out.toByteArray(); |
| |
| result = super.defineClass(name, data, 0, data.length ); |
| classes.put(name,result); |
| |
| return result; |
| |
| }catch(java.io.IOException ioe){ |
| |
| throw new ClassNotFoundException( name + " caused by " |
| + ioe.getMessage() ); |
| } |
| |
| |
| } |
| |
| // not very trivial to emulate we must implement "findClass", |
| // but it will delegete to junit class loder first |
| public Class loadClass(String name)throws ClassNotFoundException{ |
| |
| //isolates all logging classes, application in the same classloader too. |
| //filters exeptions to simlify handling in test |
| for(int i = 0; i < LOG_PCKG.length; i++ ){ |
| if( name.startsWith( LOG_PCKG[i] ) && |
| name.indexOf("Exception") == -1 ){ |
| return def(name); |
| } |
| } |
| return super.loadClass(name); |
| } |
| |
| } |
| |
| |
| |
| public void testInContainer()throws Exception{ |
| |
| //problem can be in this step (broken app container or missconfiguration) |
| //1. Thread.currentThread().setContextClassLoader(ClassLoader.getSystemClassLoader()); |
| //2. Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader()); |
| // we expect this : |
| // 1. Thread.currentThread().setContextClassLoader(appLoader); |
| // 2. Thread.currentThread().setContextClassLoader(null); |
| |
| Class cls = reload(); |
| Thread.currentThread().setContextClassLoader(cls.getClassLoader()); |
| execute(cls); |
| |
| cls = reload(); |
| Thread.currentThread().setContextClassLoader(null); |
| execute(cls); |
| |
| |
| cls = reload(); |
| Thread.currentThread().setContextClassLoader(ClassLoader.getSystemClassLoader()); |
| try{ |
| execute(cls); |
| fail("SystemClassLoader"); |
| }catch( LogConfigurationException ok ){ |
| |
| } |
| |
| |
| cls = reload(); |
| Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader()); |
| try{ |
| execute(cls); |
| fail("ContainerClassLoader"); |
| }catch( LogConfigurationException ok ){ |
| |
| } |
| |
| } |
| |
| private Class reload()throws Exception{ |
| |
| Class testObjCls = null; |
| |
| AppClassLoader appLoader = new AppClassLoader( this.getClass(). |
| getClassLoader() |
| |
| ); |
| try{ |
| |
| testObjCls = appLoader.loadClass(UserClass.class.getName()); |
| |
| }catch(ClassNotFoundException cnfe){ |
| throw cnfe; |
| }catch(Throwable t){ |
| t.printStackTrace(); |
| fail("AppClassLoader failed "); |
| } |
| |
| assertTrue( "app isolated" ,testObjCls.getClassLoader() == appLoader ); |
| |
| |
| return testObjCls; |
| |
| |
| } |
| |
| |
| private void execute(Class cls)throws Exception{ |
| |
| cls.newInstance(); |
| |
| } |
| |
| |
| |
| /** Creates a new instance of LoadTest */ |
| public LoadTest(String testName) { |
| super(testName); |
| } |
| |
| |
| |
| |
| public static void main(String[] args){ |
| String[] testCaseName = { LoadTest.class.getName() }; |
| junit.textui.TestRunner.main(testCaseName); |
| } |
| |
| public static Test suite() { |
| TestSuite suite = new TestSuite(); |
| |
| suite.addTestSuite(LoadTest.class); |
| |
| return suite; |
| } |
| |
| } |