org.springframework.instrument.classloading.jboss.JBossLoadTimeWeaver Maven / Gradle / Ivy
/*
* Copyright 2002-2015 the original author or authors.
*
* 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.springframework.instrument.classloading.jboss;
import java.lang.instrument.ClassFileTransformer;
import org.springframework.instrument.classloading.LoadTimeWeaver;
import org.springframework.instrument.classloading.SimpleThrowawayClassLoader;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;
/**
* {@link LoadTimeWeaver} implementation for JBoss's instrumentable ClassLoader.
* Autodetects the specific JBoss version at runtime: currently supports
* JBoss AS 6 and 7, as well as WildFly 8 and 9 (as of Spring 4.2).
*
* NOTE: On JBoss 6, to avoid the container loading the classes before the
* application actually starts, one needs to add a WEB-INF/jboss-scanning.xml
* file to the application archive - with the following content:
*
<scanning xmlns="urn:jboss:scanning:1.0"/>
*
* Thanks to Ales Justin and Marius Bogoevici for the initial prototype.
*
* @author Costin Leau
* @author Juergen Hoeller
* @since 3.0
*/
public class JBossLoadTimeWeaver implements LoadTimeWeaver {
private final JBossClassLoaderAdapter adapter;
/**
* Create a new instance of the {@link JBossLoadTimeWeaver} class using
* the default {@link ClassLoader class loader}.
* @see org.springframework.util.ClassUtils#getDefaultClassLoader()
*/
public JBossLoadTimeWeaver() {
this(ClassUtils.getDefaultClassLoader());
}
/**
* Create a new instance of the {@link JBossLoadTimeWeaver} class using
* the supplied {@link ClassLoader}.
* @param classLoader the {@code ClassLoader} to delegate to for weaving
* (must not be {@code null})
*/
public JBossLoadTimeWeaver(ClassLoader classLoader) {
Assert.notNull(classLoader, "ClassLoader must not be null");
if (classLoader.getClass().getName().startsWith("org.jboss.modules")) {
// JBoss AS 7 or WildFly
this.adapter = new JBossModulesAdapter(classLoader);
}
else {
// JBoss AS 6
this.adapter = new JBossMCAdapter(classLoader);
}
}
@Override
public void addTransformer(ClassFileTransformer transformer) {
this.adapter.addTransformer(transformer);
}
@Override
public ClassLoader getInstrumentableClassLoader() {
return this.adapter.getInstrumentableClassLoader();
}
@Override
public ClassLoader getThrowawayClassLoader() {
return new SimpleThrowawayClassLoader(getInstrumentableClassLoader());
}
}