/*
* 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.logging.tccl.logfactory;
import java.net.URL;
import junit.framework.Test;
import junit.framework.TestCase;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.logging.PathableClassLoader;
import org.apache.commons.logging.PathableTestSuite;
/**
* Verify that by default a custom LogFactoryImpl is loaded from the
* tccl classloader.
*/
public class TcclEnabledTestCase extends TestCase {
// ------------------------------------------- JUnit Infrastructure Methods
/**
* Return the tests included in this test suite.
*/
public static Test suite() throws Exception {
Class thisClass = TcclEnabledTestCase.class;
// Determine the URL to this .class file, so that we can then
// append the priority dirs to it. For tidiness, load this
// class through a dummy loader though this is not absolutely
// necessary...
PathableClassLoader dummy = new PathableClassLoader(null);
dummy.useExplicitLoader("junit.", Test.class.getClassLoader());
dummy.addLogicalLib("testclasses");
dummy.addLogicalLib("commons-logging");
String thisClassPath = thisClass.getName().replace('.', '/') + ".class";
URL baseUrl = dummy.findResource(thisClassPath);
// Now set up the desired classloader hierarchy. Everything goes into
// the parent classpath, but we exclude the custom LogFactoryImpl
// class.
//
// We then create a tccl classloader that can see the custom
// LogFactory class. Therefore if that class can be found, then the
// TCCL must have been used to load it.
PathableClassLoader emptyLoader = new PathableClassLoader(null);
PathableClassLoader parentLoader = new PathableClassLoader(null);
parentLoader.useExplicitLoader("junit.", Test.class.getClassLoader());
parentLoader.addLogicalLib("commons-logging");
parentLoader.addLogicalLib("testclasses");
// hack to ensure that the testcase classloader can't see
// the cust MyLogFactoryImpl
parentLoader.useExplicitLoader(
"org.apache.commons.logging.tccl.custom.", emptyLoader);
URL propsEnableUrl = new URL(baseUrl, "props_enable_tccl/");
parentLoader.addURL(propsEnableUrl);
PathableClassLoader tcclLoader = new PathableClassLoader(parentLoader);
tcclLoader.addLogicalLib("testclasses");
Class testClass = parentLoader.loadClass(thisClass.getName());
return new PathableTestSuite(testClass, tcclLoader);
}
/**
* Set up instance variables required by this test case.
*/
public void setUp() throws Exception {
LogFactory.releaseAll();
}
/**
* Tear down instance variables required by this test case.
*/
public void tearDown() {
LogFactory.releaseAll();
}
// ----------------------------------------------------------- Test Methods
/**
* Verify that MyLogFactoryImpl is only loadable via the tccl.
*/
public void testLoader() throws Exception {
ClassLoader thisClassLoader = this.getClass().getClassLoader();
ClassLoader tcclLoader = Thread.currentThread().getContextClassLoader();
// the tccl loader should NOT be the same as the loader that loaded this test class.
assertNotSame("tccl not same as test classloader", thisClassLoader, tcclLoader);
// MyLogFactoryImpl should not be loadable via parent loader
try {
Class clazz = thisClassLoader.loadClass(
"org.apache.commons.logging.tccl.custom.MyLogFactoryImpl");
fail("Unexpectedly able to load MyLogFactoryImpl via test class classloader");
assertNotNull(clazz); // silence warning about unused var
} catch(ClassNotFoundException ex) {
// ok, expected
}
// MyLogFactoryImpl should be loadable via tccl loader
try {
Class clazz = tcclLoader.loadClass(
"org.apache.commons.logging.tccl.custom.MyLogFactoryImpl");
assertNotNull(clazz);
} catch(ClassNotFoundException ex) {
fail("Unexpectedly unable to load MyLogFactoryImpl via tccl classloader");
}
}
/**
* Verify that the custom LogFactory implementation which is only accessable
* via the TCCL has successfully been loaded as specified in the config file.
* This proves that the TCCL was used to load that class.
*/
public void testTcclLoading() throws Exception {
LogFactory instance = LogFactory.getFactory();
assertEquals(
"Correct LogFactory loaded",
"org.apache.commons.logging.tccl.custom.MyLogFactoryImpl",
instance.getClass().getName());
}
}