[jboss-user] [Javassist] - How to manage instrumentation in application deployed on JBoss?

adesanctis [https://community.jboss.org/people/adesanctis] created the discussion "How to manage instrumentation in application deployed on JBoss?" To view the discussion, visit: https://community.jboss.org/message/715422#715422 -------------------------------------------------------------- Hello everybody, I'm trying to instrument classes in JBoss Enterprise application on JBoss EA5.0 Using this code: | | public byte[] transform(ClassLoader loader, | |         | String className, | |         | Class classBeingRedefined, | |         | ProtectionDomain protectionDomain, | |         | byte[] classfileBuffer) throws IllegalClassFormatException { | |     | // The class name contains slashes instead of periods, so use transform those to | |     | // dots for readability within the trace | |     | String dotClassName = className.replace('/', '.'); | |     | if (className.startsWith("$")) { | |         | return null; | |     | } | |     | // Only instrument a class once | |     | if (instrumentedClasses.contains(className)) { | |         | return null; | |     | } | |     | instrumentedClasses.add(className); | |     | // Skip in the list of class prefixes to skip | |     | for (MethodSelector classToSkip : classesToSkip) { | |         | if (dotClassName.startsWith(classToSkip.getPackageName())) { | |             | return null; | |         | } | |     | } | |     | if (logger.isInfoEnabled()) { | |         | logger.info("Checking class: " + className); | |     | } | |     | | |     | try { | |         | classPool.insertClassPath(new ByteArrayClassPath(className, classfileBuffer)); | | //        | classPool.insertClassPath(new ClassClassPath(this.getClass())); | |         | | | //        | classPool.insertClassPath(new ClassClassPath(classBeingRedefined.getClass())); | |         | *CtClass cc = classPool.get(dotClassName);* | | //        | CtClass cc = classPool.makeClass(new ByteArrayInputStream(classfileBuffer));        | | // In bold line where exception is raised. I suppose that arror is related to specific class loader used for load class. The question is: how to manage classes independently from class loader used? Is there a way to manage all possible case when working on JBoss? Thank you Alessandro 09:37:59,040 ERROR [STDERR] javassist.NotFoundException: com.arjuna.ats.internal.jta.recovery.arjunacore.RecoveryXids 09:37:59,040 ERROR [STDERR]     at javassist.ClassPool.get(ClassPool.java:436) 09:37:59,040 ERROR [STDERR]     at by.concept.applicationtracer.AdvancedTransformer.transform(AdvancedTransformer.java:163) 09:37:59,040 ERROR [STDERR]     at sun.instrument.TransformerManager.transform(TransformerManager.java:169) 09:37:59,040 ERROR [STDERR]     at sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:365) 09:37:59,040 ERROR [STDERR]     at java.lang.ClassLoader.defineClass1(Native Method) 09:37:59,040 ERROR [STDERR]     at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) 09:37:59,040 ERROR [STDERR]     at java.lang.ClassLoader.defineClass(ClassLoader.java:615) 09:37:59,040 ERROR [STDERR]     at org.jboss.classloader.spi.base.BaseClassLoader.access$200(BaseClassLoader.java:67) 09:37:59,040 ERROR [STDERR]     at org.jboss.classloader.spi.base.BaseClassLoader$2.run(BaseClassLoader.java:633) 09:37:59,040 ERROR [STDERR]     at org.jboss.classloader.spi.base.BaseClassLoader$2.run(BaseClassLoader.java:592) 09:37:59,040 ERROR [STDERR]     at java.security.AccessController.doPrivileged(Native Method) 09:37:59,040 ERROR [STDERR]     at org.jboss.classloader.spi.base.BaseClassLoader.loadClassLocally(BaseClassLoader.java:591) 09:37:59,040 ERROR [STDERR]     at org.jboss.classloader.spi.base.BaseClassLoader.loadClassLocally(BaseClassLoader.java:568) 09:37:59,040 ERROR [STDERR]     at org.jboss.classloader.spi.base.BaseDelegateLoader.loadClass(BaseDelegateLoader.java:135) 09:37:59,040 ERROR [STDERR]     at org.jboss.classloader.spi.filter.FilteredDelegateLoader.loadClass(FilteredDelegateLoader.java:131) 09:37:59,040 ERROR [STDERR]     at org.jboss.classloader.spi.base.ClassLoadingTask$ThreadTask.run(ClassLoadingTask.java:455) 09:37:59,040 ERROR [STDERR]     at org.jboss.classloader.spi.base.ClassLoaderManager.nextTask(ClassLoaderManager.java:267) 09:37:59,040 ERROR [STDERR]     at org.jboss.classloader.spi.base.ClassLoaderManager.process(ClassLoaderManager.java:166) 09:37:59,040 ERROR [STDERR]     at org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseClassLoaderDomain.java:276) 09:37:59,040 ERROR [STDERR]     at org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseClassLoaderDomain.java:1138) 09:37:59,040 ERROR [STDERR]     at org.jboss.classloader.spi.base.BaseClassLoader.loadClassFromDomain(BaseClassLoader.java:862) 09:37:59,040 ERROR [STDERR]     at org.jboss.classloader.spi.base.BaseClassLoader.doLoadClass(BaseClassLoader.java:502) 09:37:59,040 ERROR [STDERR]     at org.jboss.classloader.spi.base.BaseClassLoader.loadClass(BaseClassLoader.java:447) -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/715422#715422] Start a new discussion in Javassist at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]