001/* 002 * Copyright 2002-2015 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.instrument.classloading.jboss; 018 019import java.lang.instrument.ClassFileTransformer; 020 021import org.springframework.instrument.classloading.LoadTimeWeaver; 022import org.springframework.instrument.classloading.SimpleThrowawayClassLoader; 023import org.springframework.util.Assert; 024import org.springframework.util.ClassUtils; 025 026/** 027 * {@link LoadTimeWeaver} implementation for JBoss's instrumentable ClassLoader. 028 * Autodetects the specific JBoss version at runtime: currently supports 029 * JBoss AS 6 and 7, as well as WildFly 8 and 9 (as of Spring 4.2). 030 * 031 * <p><b>NOTE:</b> On JBoss 6, to avoid the container loading the classes before the 032 * application actually starts, one needs to add a <tt>WEB-INF/jboss-scanning.xml</tt> 033 * file to the application archive - with the following content: 034 * <pre class="code"><scanning xmlns="urn:jboss:scanning:1.0"/></pre> 035 * 036 * <p>Thanks to Ales Justin and Marius Bogoevici for the initial prototype. 037 * 038 * @author Costin Leau 039 * @author Juergen Hoeller 040 * @since 3.0 041 */ 042public class JBossLoadTimeWeaver implements LoadTimeWeaver { 043 044 private final JBossClassLoaderAdapter adapter; 045 046 047 /** 048 * Create a new instance of the {@link JBossLoadTimeWeaver} class using 049 * the default {@link ClassLoader class loader}. 050 * @see org.springframework.util.ClassUtils#getDefaultClassLoader() 051 */ 052 public JBossLoadTimeWeaver() { 053 this(ClassUtils.getDefaultClassLoader()); 054 } 055 056 /** 057 * Create a new instance of the {@link JBossLoadTimeWeaver} class using 058 * the supplied {@link ClassLoader}. 059 * @param classLoader the {@code ClassLoader} to delegate to for weaving 060 * (must not be {@code null}) 061 */ 062 public JBossLoadTimeWeaver(ClassLoader classLoader) { 063 Assert.notNull(classLoader, "ClassLoader must not be null"); 064 if (classLoader.getClass().getName().startsWith("org.jboss.modules")) { 065 // JBoss AS 7 or WildFly 066 this.adapter = new JBossModulesAdapter(classLoader); 067 } 068 else { 069 // JBoss AS 6 070 this.adapter = new JBossMCAdapter(classLoader); 071 } 072 } 073 074 075 @Override 076 public void addTransformer(ClassFileTransformer transformer) { 077 this.adapter.addTransformer(transformer); 078 } 079 080 @Override 081 public ClassLoader getInstrumentableClassLoader() { 082 return this.adapter.getInstrumentableClassLoader(); 083 } 084 085 @Override 086 public ClassLoader getThrowawayClassLoader() { 087 return new SimpleThrowawayClassLoader(getInstrumentableClassLoader()); 088 } 089 090}