/*
* RHQ Management Platform
* Copyright (C) 2005-2008 Red Hat, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation, and/or the GNU Lesser
* General Public License, version 2.1, also as published by the Free
* Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License and the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* and the GNU Lesser General Public License along with this program;
* if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.rhq.core.pc.plugin;
import java.io.File;
import java.lang.reflect.Field;
import java.net.URL;
import javax.management.ObjectName;
import javax.naming.InitialContext;
import org.testng.annotations.Test;
import org.rhq.core.pluginapi.measurement.MeasurementFacet;
@Test
public class RootPluginClassLoaderTest {
// this regex will match the core classes (classloader to exclude core classes)
private static final String CORE_REGEX = "org\\.rhq\\.(core|enterprise)\\..*";
// this regex is designed to not match any class (classloader to load everything)
private static final String NONE_REGEX = "this-will-match-nothing";
// this regex is designed to match all classes except for java.* classes (classloader to exclude everything but J2SE classes)
private static final String ALL_REGEX = "(?!java).*";
// this regex will match JMX classes (classloader to excluded JMX classes)
private static final String JMX_REGEX = "javax\\.management\\..*";
// this regex will match javax.* classes (classloader to excluded only Java extension classes)
private static final String JAVAX_REGEX = "javax\\..*";
private ClassLoader parentClassLoader = this.getClass().getClassLoader();
public void testChildFirst() throws Exception {
// this will exclude all classes in the parent classloaders
ClassLoader cl = new RootPluginClassLoader(new URL[] {}, parentClassLoader, ALL_REGEX);
try {
Class.forName("test.DummyObject", true, cl);
assert false : "Failed sanity check! How did the dummy object from the test jar get into our classloader?";
} catch (ClassNotFoundException ok) {
}
// we have pre-built a test jar with a test.DummyObject in it. It has this constant defined in it:
// public static final String DUMMY_CONSTANT = "dummy constant value";
// It also has a no-arg constructor and a "String getValue()" method that always returns a non-null string.
URL testJar = new File("target/test-classes/classloader-test.jar").toURI().toURL();
cl = new RootPluginClassLoader(new URL[] { testJar }, parentClassLoader, ALL_REGEX);
Class<?> clazz = Class.forName("test.DummyObject", true, cl);
Field field = clazz.getDeclaredField("DUMMY_CONSTANT");
assert "dummy constant value".equals(field.get(null)) : "Failed to obtain the constant value";
Object dummyObject = clazz.newInstance();
assert clazz.getMethod("getValue").invoke(dummyObject) != null : "Cannot invoke method on loaded class";
}
public void testHiddenClasses() throws Exception {
// this will hide all core plugin classes
ClassLoader cl = new RootPluginClassLoader(new URL[] {}, parentClassLoader, CORE_REGEX);
assert Class.forName(String.class.getName(), true, cl) != null : "Should always be able to get J2SE classes";
try {
Class.forName(MeasurementFacet.class.getName(), true, cl);
assert false : "The class should have been hidden!";
} catch (ClassNotFoundException ok) {
}
}
public void testHideJavaLang() throws Exception {
// just proves that we can even hide J2SE classes
ClassLoader cl = new RootPluginClassLoader(new URL[] {}, parentClassLoader, ".*");
try {
Class.forName(String.class.getName(), true, cl);
assert false : "The class should have been hidden!";
} catch (ClassNotFoundException ok) {
}
try {
Class.forName(Object.class.getName(), true, cl);
assert false : "The class should have been hidden!";
} catch (ClassNotFoundException ok) {
}
}
public void testUnhiddenClasses() throws Exception {
ClassLoader cl = new RootPluginClassLoader(new URL[] {}, parentClassLoader, NONE_REGEX);
assert Class.forName(String.class.getName(), true, cl) != null : "Should always be able to get J2SE classes";
assert Class.forName(MeasurementFacet.class.getName(), true, cl) != null;
cl = new RootPluginClassLoader(new URL[] {}, parentClassLoader, (String[]) null); // null regex means do not hide anything
assert Class.forName(String.class.getName(), true, cl) != null : "Should always be able to get J2SE classes";
assert Class.forName(MeasurementFacet.class.getName(), true, cl) != null;
}
public void testJMXClasses() throws Exception {
ClassLoader cl = new RootPluginClassLoader(new URL[] {}, parentClassLoader, (String[]) null); // null regex means do not hide anything
assert Class.forName(String.class.getName(), true, cl) != null : "Should always be able to get J2SE classes";
assert Class.forName(InitialContext.class.getName(), true, cl) != null;
assert Class.forName(ObjectName.class.getName(), true, cl) != null;
cl = new RootPluginClassLoader(new URL[] {}, parentClassLoader, JMX_REGEX);
assert Class.forName(String.class.getName(), true, cl) != null : "Should always be able to get J2SE classes";
assert Class.forName(InitialContext.class.getName(), true, cl) != null;
try {
Class.forName(ObjectName.class.getName(), true, cl);
assert false : "The class should have been hidden!";
} catch (ClassNotFoundException ok) {
}
cl = new RootPluginClassLoader(new URL[] {}, parentClassLoader, JAVAX_REGEX);
assert Class.forName(String.class.getName(), true, cl) != null : "Should always be able to get J2SE classes";
try {
Class.forName(ObjectName.class.getName(), true, cl);
assert false : "The JMX class should have been hidden!";
} catch (ClassNotFoundException ok) {
}
try {
Class.forName(InitialContext.class.getName(), true, cl);
assert false : "The class should have been hidden!";
} catch (ClassNotFoundException ok) {
}
}
}