/**************************************************************************************
* Copyright (c) Jonas Bon�r, Alexandre Vasseur. All rights reserved. *
* http://aspectwerkz.codehaus.org *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the LGPL license *
* a copy of which has been included with this distribution in the license.txt file. *
**************************************************************************************/
package org.codehaus.aspectwerkz.extension.jrockit;
import org.codehaus.aspectwerkz.hook.ClassPreProcessor;
import org.codehaus.aspectwerkz.hook.impl.ClassPreProcessorHelper;
import com.bea.jvm.JVMFactory;
import com.jrockit.management.rmp.RmpSocketListener;
/**
* JRockit (tested with 7SP4 and 8.1) preprocessor Adapter based on JMAPI <p/>JRockit has a low
* level API for hooking ClassPreProcessor, allowing the use of online weaving at full speed.
* Moreover, JRockit does not allow java.lang.ClassLoader overriding thru -Xbootclasspath/p option.
* <p/>The main difference with standard AspectWerkz online mode is that the ClassPreProcessor
* implementation and all third party jars CAN reside in the standard classpath. <p/>The command
* line tool will look like:
* <code>"%JAVA_COMMAND%" -Xmanagement:class=org.codehaus.aspectwerkz.extension.jrockit.JRockitPreProcessor
* -cp "%ASPECTWERKZ_HOME%\target\aspectwerkz-extensions-%ASPECTWERKZ_VERSION%.jar;%ASPECTWERKZ_HOME%\lib\javassist-3.0RC1.jar;%ASPECTWERKZ_HOME%\lib\aspectwerkz-core-%ASPECTWERKZ_VERSION%.jar;%ASPECTWERKZ_HOME%\lib\aspectwerkz-%ASPECTWERKZ_VERSION%.jar;%ASPECTWERKZ_LIBS%"
* -Daspectwerkz.home="%ASPECTWERKZ_HOME%" -Daspectwerkz.transform.verbose=yes %*</code>
* Note: there can be some NoClassDefFoundError due to classpath limitation - as described in
* http://edocs.bea.com/wls/docs81/adminguide/winservice.html <p/>In order to use the BEA JRockit
* management server (for further connection of management console or runtime analyzer), the regular
* option -Xmanagement will not have any effect. Instead, use <code>-Dmanagement</code>.
*
* @author <a href="mailto:alex@gnilux.com">Alexandre Vasseur </a>
* @author <a href="mailto:jboner@codehaus.org">Jonas Bon�r </a>
*/
public class JRockitPreProcessor implements com.bea.jvm.ClassPreProcessor {
/**
* Concrete AspectWerkz preprocessor.
*/
private static ClassPreProcessor s_preProcessor;
private static boolean START_RMP_SERVER = false;
static {
String clpp = System.getProperty(
"aspectwerkz.classloader.preprocessor",
"org.codehaus.aspectwerkz.transform.AspectWerkzPreProcessor");
START_RMP_SERVER = System.getProperties().containsKey("management");
try {
// note: CLPP loaded by current thread classloader which is bootstrap classloader
// caution: forcing loading thru Thread.setContextClassLoader() or
// ClassLoader.getSystemClassLoader()
// does not work. We then do a filtering on the caller classloader - see preProcess(..)
//preProcessor = (ClassPreProcessor) Class.forName(clpp).newInstance();
s_preProcessor = ClassPreProcessorHelper.getClassPreProcessor();
//(ClassPreProcessor)ClassLoader.getSystemClassLoader().loadClass(clpp).newInstance();
//s_preProcessor.initialize(null);
} catch (Exception e) {
throw new ExceptionInInitializerError(
"could not initialize jrockit preprocessor due to: " + e.toString());
}
}
/**
* The JMAPI ClassPreProcessor must be self registrating
*/
public JRockitPreProcessor() {
if (START_RMP_SERVER) {
// the management server will be spawned in a new thread
RmpSocketListener management = new RmpSocketListener();
}
JVMFactory.getJVM().getClassLibrary().setClassPreProcessor(this);
}
/**
* Weave a class
*
* @param caller classloader
* @param name of the class to weave
* @param bytecode original
* @return bytecode weaved
*/
public byte[] preProcess(ClassLoader caller, String name, byte[] bytecode) {
if (caller == null || caller.getParent() == null) {
return bytecode;
} else {
return s_preProcessor.preProcess(name, bytecode, caller);
}
}
/**
* Utility for testing
*/
public static void main(String args[]) throws Throwable {
// uncomment this lines to programmaticaly configure at runtime the CLPP
JRockitPreProcessor pp = new JRockitPreProcessor();//self registration
Class loadedCP = Class.forName("java.math.BigDecimal");
while (true) {
System.out.print(".");
/*
* ClassLoader nonDelegatingCL = new VerifierClassLoader( new URL[]{(new
* File(args[0])).toURL()}, ClassLoader.getSystemClassLoader() ); Class loaded =
* nonDelegatingCL.loadClass(
* org.codehaus.aspectwerkz.extension.jrockit.JRockitPreProcessor.class.getName() );
*/
Thread.sleep(500);
}
}
}