/**************************************************************************************
* 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 BSD-style license *
* a copy of which has been included with this distribution in the license.txt file. *
**************************************************************************************/
package org.codehaus.aspectwerkz.extension.hotswap;
import org.codehaus.aspectwerkz.hook.impl.ClassPreProcessorHelper;
import org.codehaus.aspectwerkz.hook.RuntimeClassProcessor;
import org.codehaus.aspectwerkz.exception.WrappedRuntimeException;
import org.codehaus.aspectwerkz.joinpoint.management.JoinPointManager;
/**
* In process HotSwap - Java level API
* <p/>
* When used, the hook* classes (AspectWerkz - core) MUST be in bootclasspath to ensure correct behavior and lookup of
* the ClassPreProcessor singleton and the cache
*
* @author <a href="mailto:alex@gnilux.com">Alexandre Vasseur</a>
*/
public class HotSwapClient {
static {
System.loadLibrary("aspectwerkz");
}
/**
* Native method to calls the JVM C level API
*
* @param className
* @param klazz
* @param newBytes
* @param newLength
* @return
*/
private static native int hotswap(String className, Class klazz, byte[] newBytes, int newLength);
/**
* In process hotswap
*
* @param klazz
* @param newBytes
*/
public static void hotswap(Class klazz, byte[] newBytes) {
int code = hotswap(klazz.getName(), klazz, newBytes, newBytes.length);
//System.out.println("hotswap " + klazz.getName());
if (code != 0) {
throw new RuntimeException("HotSwap failed for " + klazz.getName() + ": " + code);
}
}
/**
* AspectWerkz HotSwap, uses the ClassPreProcessor if capable of Runtime weaving The given Class is hotswap after
* transformation based on the current definitions
*
* @param klazz
*/
public static void hotswap(Class klazz) {
if ((
ClassPreProcessorHelper.class.getClassLoader() !=
ClassPreProcessorHelper.getClassPreProcessor().getClass().getClassLoader()
)
&& (ClassPreProcessorHelper.class.getClassLoader() != null)) {
throw new RuntimeException(
"AspectWerkz is misconfigured for HotSwap cache to work: "
+ ClassPreProcessorHelper.class.getClassLoader() +
" incompatible with "
+
ClassPreProcessorHelper.getClassPreProcessor().getClass().getClassLoader()
);
}
// Note: the following will not reset the JoinPointManager - see 1.0 instead.
try {
RuntimeClassProcessor runtimeProcessor = (RuntimeClassProcessor)ClassPreProcessorHelper.getClassPreProcessor();
hotswap(klazz, runtimeProcessor.preProcessActivate(klazz));
// trash the join points
//JoinPointManager joinPointManager = JoinPointManager.getJoinPointManager(klazz, "N/A/notneeded");
//joinPointManager.reset();
JoinPointManager.reset(klazz);
} catch (Throwable t) {
throw new WrappedRuntimeException(t);
}
}
}