How to manage instrumentation in application deployed on JBoss?
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)
