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+ redone the JBossLTW (no dependency on the JBoss API) - removed JBoss jars - removed JBoss imports (Spring code doesn't rely on it) git-svn-id: https://src.springframework.org/svn/spring-framework/trunk@2364 50f2f4bb-b051-0410-bef5-90022cba6387pull/1/head
11 changed files with 227 additions and 466 deletions
@ -1,50 +0,0 @@
@@ -1,50 +0,0 @@
|
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/* |
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* Copyright 2002-2009 the original author or authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
|
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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package org.springframework.instrument.classloading.jboss; |
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|
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import java.security.ProtectionDomain; |
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import java.lang.instrument.ClassFileTransformer; |
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|
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import org.jboss.util.loading.Translator; |
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|
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/** |
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* ClassFileTransfomer to Translator bridge. |
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* |
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* @author Ales Justin |
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*/ |
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public class ClassFileTransformer2Translator implements Translator { |
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private ClassFileTransformer transformer; |
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|
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public ClassFileTransformer2Translator(ClassFileTransformer transformer) { |
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if (transformer == null) { |
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throw new IllegalArgumentException("Null transformer"); |
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} |
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this.transformer = transformer; |
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} |
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public byte[] transform(ClassLoader loader, |
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String className, |
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Class<?> classBeingRedefined, |
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ProtectionDomain protectionDomain, |
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byte[] classfileBuffer) throws Exception { |
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return transformer.transform(loader, className, classBeingRedefined, protectionDomain, classfileBuffer); |
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} |
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|
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public void unregisterClassLoader(ClassLoader loader) { |
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} |
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} |
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@ -1,78 +0,0 @@
@@ -1,78 +0,0 @@
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/* |
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* Copyright 2002-2009 the original author or authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
|
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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package org.springframework.instrument.classloading.jboss; |
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|
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import java.lang.reflect.Method; |
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|
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import org.jboss.classloader.spi.ClassLoaderSystem; |
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import org.jboss.classloader.spi.base.BaseClassLoader; |
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import org.jboss.classloader.spi.base.BaseClassLoaderDomain; |
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import org.jboss.classloader.spi.base.BaseClassLoaderPolicy; |
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import org.jboss.classloader.spi.base.BaseClassLoaderSystem; |
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import org.jboss.util.loading.Translator; |
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|
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/** |
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* Reflective wrapper around a JBoss_5.0.x class loader. Used to encapsulate the classloader-specific methods |
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* (discovered and called through reflection) from the load-time weaver. |
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* |
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* @author Ales Justin |
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*/ |
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public class JBoss50ClassLoader extends JBoss5ClassLoader { |
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private Method addTranslator; |
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private ClassLoaderSystem system; |
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public JBoss50ClassLoader(BaseClassLoader classLoader) { |
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super(classLoader); |
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} |
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protected void fallbackStrategy() throws Exception { |
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try { |
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// let's check if we have a patched policy, with translator per policy
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addTranslator = getMethod(BaseClassLoaderPolicy.class, "addTranslator"); |
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} |
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catch (Exception ignored) { |
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//log.info("Policy doesn't have addTranslator, falling back to ClassLoaderSystem.");
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Method getClassLoaderDomain = getMethod(BaseClassLoaderPolicy.class, "getClassLoaderDomain"); |
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BaseClassLoaderDomain domain = invokeMethod(getClassLoaderDomain, getPolicy(), BaseClassLoaderDomain.class); |
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Method getClassLoaderSystem = getMethod(BaseClassLoaderDomain.class, "getClassLoaderSystem"); |
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BaseClassLoaderSystem system = invokeMethod(getClassLoaderSystem, domain, BaseClassLoaderSystem.class); |
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if (system instanceof ClassLoaderSystem) { |
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this.system = ClassLoaderSystem.class.cast(system); |
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} |
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else { |
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throw new IllegalArgumentException( |
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"ClassLoaderSystem must be instance of [" + ClassLoaderSystem.class.getName() + "]"); |
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} |
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} |
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} |
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|
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protected void addTranslator(Translator translator) { |
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if (addTranslator != null) { |
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try { |
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addTranslator.invoke(translator); |
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} |
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catch (Exception e) { |
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throw new IllegalArgumentException(e); |
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} |
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} |
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else { |
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system.setTranslator(translator); |
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} |
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} |
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} |
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@ -1,37 +0,0 @@
@@ -1,37 +0,0 @@
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/* |
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* Copyright 2002-2009 the original author or authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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package org.springframework.instrument.classloading.jboss; |
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|
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import org.jboss.classloader.spi.base.BaseClassLoader; |
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import org.jboss.util.loading.Translator; |
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|
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/** |
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* Reflective wrapper around a JBoss_5.1.x class loader. Used to encapsulate the classloader-specific methods |
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* (discovered and called through reflection) from the load-time weaver. |
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* |
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* @author <a href="mailto:ales.justin@jboss.org">Ales Justin</a> |
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*/ |
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public class JBoss51ClassLoader extends JBoss5ClassLoader { |
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public JBoss51ClassLoader(BaseClassLoader classLoader) { |
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super(classLoader); |
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} |
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protected void addTranslator(Translator translator) { |
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getPolicy().addTranslator(translator); |
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} |
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} |
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@ -1,120 +0,0 @@
@@ -1,120 +0,0 @@
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/* |
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* Copyright 2002-2009 the original author or authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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package org.springframework.instrument.classloading.jboss; |
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import java.lang.instrument.ClassFileTransformer; |
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import java.lang.reflect.Method; |
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import java.security.AccessController; |
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import java.security.PrivilegedExceptionAction; |
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|
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import org.jboss.classloader.spi.ClassLoaderPolicy; |
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import org.jboss.classloader.spi.base.BaseClassLoader; |
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import org.jboss.util.loading.Translator; |
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|
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import org.springframework.util.Assert; |
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import org.springframework.instrument.classloading.SimpleThrowawayClassLoader; |
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|
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/** |
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* Reflective wrapper around a JBoss5 class loader. Used to encapsulate the classloader-specific methods (discovered and |
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* called through reflection) from the load-time weaver. |
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* |
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* @author Ales Justin |
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* @author Marius Bogoevici |
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*/ |
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public abstract class JBoss5ClassLoader extends ReflectionHelper { |
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private final BaseClassLoader classLoader; |
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private ClassLoaderPolicy policy; |
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@SuppressWarnings("unchecked") |
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protected JBoss5ClassLoader(BaseClassLoader classLoader) { |
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Assert.notNull(classLoader, "ClassLoader must not be null"); |
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this.classLoader = classLoader; |
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try { |
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SecurityManager sm = System.getSecurityManager(); |
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if (sm != null) { |
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AccessController.doPrivileged(new InstantiationAction()); |
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} |
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else { |
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doInstantiate(); |
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} |
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} |
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catch (Exception e) { |
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throw new IllegalStateException( |
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"Could not initialize JBoss ClassLoader because JBoss5 API classes are not available", e); |
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} |
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} |
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|
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/** |
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* Get the policy. |
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* |
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* @return the policy |
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*/ |
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protected ClassLoaderPolicy getPolicy() { |
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return policy; |
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} |
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/** |
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* Do instantiate method, variables. |
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* |
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* @throws Exception for any error |
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*/ |
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private void doInstantiate() throws Exception { |
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Method getPolicy = getMethod(BaseClassLoader.class, "getPolicy"); |
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policy = invokeMethod(getPolicy, classLoader, ClassLoaderPolicy.class); |
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fallbackStrategy(); |
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} |
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|
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/** |
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* The fallback strategy. |
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* |
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* @throws Exception for any error |
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*/ |
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protected void fallbackStrategy() throws Exception { |
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} |
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|
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public void addTransformer(ClassFileTransformer transformer) { |
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Assert.notNull(transformer, "ClassFileTransformer must not be null"); |
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Translator translator = new ClassFileTransformer2Translator(transformer); |
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addTranslator(translator); |
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} |
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|
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/** |
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* Add the translator. |
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* |
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* @param translator the translator |
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*/ |
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protected abstract void addTranslator(Translator translator); |
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public ClassLoader getInternalClassLoader() { |
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return classLoader; |
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} |
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public ClassLoader getThrowawayClassLoader() { |
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return new SimpleThrowawayClassLoader(classLoader); |
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} |
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/** Instantiation action. */ |
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private class InstantiationAction implements PrivilegedExceptionAction { |
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public Object run() throws Exception { |
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doInstantiate(); |
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return null; |
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} |
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} |
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} |
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@ -1,120 +0,0 @@
@@ -1,120 +0,0 @@
|
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/* |
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* Copyright 2002-2009 the original author or authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
|
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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package org.springframework.instrument.classloading.jboss; |
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|
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import java.lang.instrument.ClassFileTransformer; |
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import java.lang.reflect.Method; |
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|
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import org.jboss.classloader.spi.base.BaseClassLoader; |
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|
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import org.springframework.instrument.classloading.LoadTimeWeaver; |
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import org.springframework.util.Assert; |
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import org.springframework.util.ClassUtils; |
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|
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/** |
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* {@link LoadTimeWeaver} implementation for JBoss5's instrumentable ClassLoader. |
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* |
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* @author Ales Justin |
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*/ |
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public class JBoss5LoadTimeWeaver extends ReflectionHelper implements LoadTimeWeaver { |
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private JBoss5ClassLoader classLoader; |
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|
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public JBoss5LoadTimeWeaver() { |
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this(ClassUtils.getDefaultClassLoader()); |
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} |
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|
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public JBoss5LoadTimeWeaver(ClassLoader classLoader) { |
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Assert.notNull(classLoader, "ClassLoader must not be null"); |
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BaseClassLoader bcl = determineClassLoader(classLoader); |
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if (bcl == null) { |
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throw new IllegalArgumentException( |
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classLoader + " and its parents are not suitable ClassLoaders: " + "An [" + |
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BaseClassLoader.class.getName() + "] implementation is required."); |
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} |
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this.classLoader = createClassLoaderWrapper(bcl); |
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} |
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|
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/** |
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* Create a JBoss5 classloader wrapper based on the underlying JBossAS version. |
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* |
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* @param bcl the base classloader |
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* @return new JBoss5 classloader wrapper |
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*/ |
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protected JBoss5ClassLoader createClassLoaderWrapper(BaseClassLoader bcl) { |
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int versionNumber = 0; |
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String tag; |
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|
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try { |
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// BCL should see Version class
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Class<?> versionClass = bcl.loadClass("org.jboss.Version"); |
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Method getInstance = getMethod(versionClass, "getInstance"); |
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Object version = getInstance.invoke(null); // static method
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|
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Method getMajor = getMethod(versionClass, "getMajor"); |
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versionNumber += 100 * invokeMethod(getMajor, version, Integer.class); |
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Method getMinor = getMethod(versionClass, "getMinor"); |
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versionNumber += 10 * invokeMethod(getMinor, version, Integer.class); |
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Method getRevision = getMethod(versionClass, "getRevision"); |
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versionNumber += invokeMethod(getRevision, version, Integer.class); |
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Method getTag = getMethod(versionClass, "getTag"); |
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tag = invokeMethod(getTag, version, String.class); |
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} |
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catch (Exception e) { |
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//log.warn("Exception creating JBoss5 CL wrapper: " + e + ", falling back to JBoss50ClassLoader wrapper.");
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return new JBoss50ClassLoader(bcl); |
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} |
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|
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if (versionNumber < 500) // this only works on new MC code
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{ |
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throw new IllegalArgumentException( |
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"JBoss5LoadTimeWeaver can only be used on new JBoss Microcontainer ClassLoader."); |
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} |
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else if (versionNumber <= 501 || (versionNumber == 510 && "Beta1".equals(tag))) { |
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return new JBoss50ClassLoader(bcl); |
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} |
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else { |
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return new JBoss51ClassLoader(bcl); |
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} |
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} |
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|
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/** |
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* Find first BaseClassLoader implementation. |
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* |
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* @param classLoader the classloader |
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* @return BaseClassLoader instance or null if not found |
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*/ |
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private BaseClassLoader determineClassLoader(ClassLoader classLoader) { |
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for (ClassLoader cl = classLoader; cl != null; cl = cl.getParent()) { |
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if (cl instanceof BaseClassLoader) { |
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return (BaseClassLoader) cl; |
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} |
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} |
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return null; |
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} |
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|
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public void addTransformer(ClassFileTransformer transformer) { |
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classLoader.addTransformer(transformer); |
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} |
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|
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public ClassLoader getInstrumentableClassLoader() { |
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return classLoader.getInternalClassLoader(); |
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} |
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|
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public ClassLoader getThrowawayClassLoader() { |
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return classLoader.getThrowawayClassLoader(); |
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} |
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} |
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@ -0,0 +1,148 @@
@@ -0,0 +1,148 @@
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/* |
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* Copyright 2006-2009 the original author or authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* 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
|
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* |
||||
* 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. |
||||
*/ |
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package org.springframework.instrument.classloading.jboss; |
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|
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import java.lang.instrument.ClassFileTransformer; |
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import java.lang.reflect.Constructor; |
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import java.lang.reflect.Method; |
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|
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import org.springframework.util.Assert; |
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import org.springframework.util.ReflectionUtils; |
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|
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/** |
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* Reflective wrapper around a JBoss 5 class loader methods (discovered and called |
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* through reflection) for load time weaving. |
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* |
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* @author Costin Leau |
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*/ |
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class JBossClassLoaderAdapter { |
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|
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private static final String TRANSLATOR_ADAPTER_NAME = "org.jboss.classloader.spi.translator.ClassFileTransformer2Translator"; |
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private static final String TRANSLATOR_NAME = "org.jboss.util.loading.Translator"; |
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private static final String POLICY_NAME = "org.jboss.classloader.spi.base.BaseClassLoaderPolicy"; |
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private static final String DOMAIN_NAME = "org.jboss.classloader.spi.base.BaseClassLoaderDomain"; |
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private static final String DEDICATED_SYSTEM = "org.jboss.classloader.spi.ClassLoaderSystem"; |
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private static final String LOADER_NAME = "org.jboss.classloader.spi.base.BaseClassLoader"; |
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private static final String GET_POLICY = "getPolicy"; |
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private static final String GET_DOMAIN = "getClassLoaderDomain"; |
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private static final String GET_SYSTEM = "getClassLoaderSystem"; |
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|
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// available since JBoss AS 5.1.0 / MC 2.0.6 (allows multiple transformers to be added)
|
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private static final String ADD_TRANSLATOR_NAME = "addTranslator"; |
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// available since JBoss AS 5.0.0 / MC 2.0.1 (allows only one transformer to be added)
|
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private static final String SET_TRANSLATOR_NAME = "setTranslator"; |
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|
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private final ClassLoader classLoader; |
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private final Constructor<?> constructor; |
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private final Method addTranslator; |
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private final Object target; |
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|
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JBossClassLoaderAdapter(ClassLoader classLoader) { |
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Class<?> clazzLoaderType = null; |
||||
try { |
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// resolve BaseClassLoader.class
|
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clazzLoaderType = classLoader.loadClass(LOADER_NAME); |
||||
|
||||
ClassLoader clazzLoader = null; |
||||
// walk the hierarchy to detect the instrumentation aware classloader
|
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for (ClassLoader cl = classLoader; cl != null && clazzLoader == null; cl = cl.getParent()) { |
||||
if (clazzLoaderType.isInstance(cl)) { |
||||
clazzLoader = cl; |
||||
} |
||||
} |
||||
|
||||
if (clazzLoader == null) { |
||||
throw new IllegalArgumentException(classLoader + " and its parents are not suitable ClassLoaders: " |
||||
+ "A [" + LOADER_NAME + "] implementation is required."); |
||||
} |
||||
|
||||
this.classLoader = clazzLoader; |
||||
|
||||
// BaseClassLoader#getPolicy
|
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Method method = clazzLoaderType.getDeclaredMethod(GET_POLICY); |
||||
ReflectionUtils.makeAccessible(method); |
||||
Object policy = method.invoke(this.classLoader); |
||||
|
||||
Object addTarget = null; |
||||
Method addMethod = null; |
||||
|
||||
// try the 5.1.x hooks
|
||||
// check existence of BaseClassLoaderPolicy#addTranslator(Translator)
|
||||
Class<?> translatorClass = classLoader.loadClass(TRANSLATOR_NAME); |
||||
Class<?> clazz = classLoader.loadClass(POLICY_NAME); |
||||
try { |
||||
addMethod = clazz.getDeclaredMethod(ADD_TRANSLATOR_NAME, translatorClass); |
||||
addTarget = policy; |
||||
} catch (NoSuchMethodException ex) { |
||||
} |
||||
|
||||
// fall back to 5.0.x method
|
||||
if (addMethod == null) { |
||||
|
||||
// BaseClassLoaderPolicy#getClassLoaderDomain
|
||||
method = clazz.getDeclaredMethod(GET_DOMAIN); |
||||
ReflectionUtils.makeAccessible(method); |
||||
Object domain = method.invoke(policy); |
||||
|
||||
// BaseClassLoaderDomain#getClassLoaderSystem
|
||||
clazz = classLoader.loadClass(DOMAIN_NAME); |
||||
method = clazz.getDeclaredMethod(GET_SYSTEM); |
||||
ReflectionUtils.makeAccessible(method); |
||||
Object system = method.invoke(domain); |
||||
addTarget = system; |
||||
|
||||
// resolve ClassLoaderSystem
|
||||
clazz = classLoader.loadClass(DEDICATED_SYSTEM); |
||||
|
||||
Assert.isInstanceOf(clazz, system, "JBoss LoadTimeWeaver requires JBoss loader system of type " |
||||
+ clazz.getName() + " on JBoss 5.0.x"); |
||||
|
||||
// ClassLoaderSystem#setTranslator
|
||||
addMethod = clazz.getDeclaredMethod(SET_TRANSLATOR_NAME, translatorClass); |
||||
} |
||||
|
||||
this.addTranslator = addMethod; |
||||
this.target = addTarget; |
||||
|
||||
// resolve Transformer2TranslatorUtil constructor
|
||||
clazz = classLoader.loadClass(TRANSLATOR_ADAPTER_NAME); |
||||
this.constructor = clazz.getDeclaredConstructor(ClassFileTransformer.class); |
||||
|
||||
} catch (Exception ex) { |
||||
throw new IllegalStateException( |
||||
"Could not initialize JBoss LoadTimeWeaver because the JBoss 5 API classes are not available", ex); |
||||
} |
||||
} |
||||
|
||||
public void addTransformer(ClassFileTransformer transformer) { |
||||
Object translator = null; |
||||
try { |
||||
translator = this.constructor.newInstance(transformer); |
||||
} catch (Exception ex) { |
||||
throw new IllegalStateException("Could not instantiate a JBoss class translator", ex); |
||||
} |
||||
|
||||
try { |
||||
addTranslator.invoke(target, translator); |
||||
} catch (Exception ex) { |
||||
throw new IllegalStateException("Could not add transformer on JBoss classloader " + classLoader, ex); |
||||
} |
||||
} |
||||
|
||||
public ClassLoader getClassLoader() { |
||||
return classLoader; |
||||
} |
||||
} |
||||
@ -0,0 +1,69 @@
@@ -0,0 +1,69 @@
|
||||
/* |
||||
* Copyright 2002-2009 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. |
||||
* |
||||
* <p><b>NOTE:</b> Requires JBoss AS version 5.0.0 or higher. |
||||
* |
||||
* <p>Thanks to Ales Justin and Marius Bogoevici for the initial prototype.</p> |
||||
* |
||||
* @author Costin Leau |
||||
*/ |
||||
public class JBossLoadTimeWeaver implements LoadTimeWeaver { |
||||
|
||||
private final JBossClassLoaderAdapter classLoader; |
||||
|
||||
/** |
||||
* Creates 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()); |
||||
} |
||||
|
||||
/** |
||||
* Creates a new instance of the {@link JBossLoadTimeWeaver} class using |
||||
* the supplied {@link ClassLoader}. |
||||
* @param classLoader the <code>ClassLoader</code> to delegate to for |
||||
* weaving (must not be <code>null</code>) |
||||
*/ |
||||
public JBossLoadTimeWeaver(ClassLoader classLoader) { |
||||
Assert.notNull(classLoader, "ClassLoader must not be null"); |
||||
this.classLoader = new JBossClassLoaderAdapter(classLoader); |
||||
} |
||||
|
||||
public void addTransformer(ClassFileTransformer transformer) { |
||||
this.classLoader.addTransformer(transformer); |
||||
} |
||||
|
||||
public ClassLoader getInstrumentableClassLoader() { |
||||
return this.classLoader.getClassLoader(); |
||||
} |
||||
|
||||
public ClassLoader getThrowawayClassLoader() { |
||||
return new SimpleThrowawayClassLoader(getInstrumentableClassLoader()); |
||||
} |
||||
} |
||||
@ -1,59 +0,0 @@
@@ -1,59 +0,0 @@
|
||||
/* |
||||
* Copyright 2002-2009 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.reflect.Method; |
||||
|
||||
/** |
||||
* Reflection helper. |
||||
* |
||||
* @author Ales Justin |
||||
*/ |
||||
public abstract class ReflectionHelper { |
||||
|
||||
/** |
||||
* Get method from class. |
||||
* |
||||
* @param clazz the owner class
|
||||
* @param name the method name |
||||
* @return declared method |
||||
* @throws Exception for any error |
||||
*/ |
||||
protected static Method getMethod(Class<?> clazz, String name) throws Exception { |
||||
Method method = clazz.getDeclaredMethod(name); |
||||
method.setAccessible(true); |
||||
return method; |
||||
} |
||||
|
||||
/** |
||||
* Invoke method and check the result. |
||||
* |
||||
* @param method the method |
||||
* @param target the target |
||||
* @param expectedType the expected type |
||||
* @param <T> the exact type |
||||
* @return invocation's result |
||||
* @throws Exception for any error |
||||
*/ |
||||
protected static <T> T invokeMethod(Method method, Object target, Class<T> expectedType) throws Exception { |
||||
Object result = method.invoke(target); |
||||
if (expectedType.isInstance(result) == false) { |
||||
throw new IllegalArgumentException("Returned result must be instance of [" + expectedType.getName() + "]"); |
||||
} |
||||
|
||||
return expectedType.cast(result); |
||||
} |
||||
} |
||||
@ -0,0 +1,8 @@
@@ -0,0 +1,8 @@
|
||||
|
||||
/** |
||||
* |
||||
* Support for class instrumentation on JBoss AS 5.x / JBoss MC 2.0.x. |
||||
* |
||||
*/ |
||||
package org.springframework.instrument.classloading.jboss; |
||||
|
||||
Loading…
Reference in new issue