se.jiderhamn.classloader.leak.prevention.cleanup

Class ThreadLocalCleanUp

java.lang.Object

se.jiderhamn.classloader.leak.prevention.cleanup.ThreadLocalCleanUp

All Implemented Interfaces:

ClassLoaderPreMortemCleanUp, MustBeAfter<ClassLoaderPreMortemCleanUp>

Direct Known Subclasses:

WarningThreadLocalCleanUp

public class ThreadLocalCleanUp
extends Object
implements ClassLoaderPreMortemCleanUp, MustBeAfter<ClassLoaderPreMortemCleanUp>

Clear ThreadLocals for which ThreadLocal.remove() has not been called, in case either the ThreadLocal is a custom one (subclassed in the protected ClassLoader), or the value is loaded by (or is) the protected ClassLoader. This must be done after threads have been stopped, or new ThreadLocals may be added by those threads.

Author:

Mattias Jiderhamn

Field Summary

Fields

Modifier and Type	Field and Description
protected Field	java_lang_Thread_inheritableThreadLocals
protected Field	java_lang_Thread_threadLocals
protected Field	java_lang_ThreadLocal$ThreadLocalMap_table
protected Field	java_lang_ThreadLocal$ThreadLocalMap$Entry_value

Constructor Summary

Constructors

Constructor and Description
ThreadLocalCleanUp()

Method Summary

Modifier and Type	Method and Description
void	cleanUp(ClassLoaderLeakPreventor preventor) Perform cleanup actions needed to make provided ClassLoaderLeakPreventor.classLoader ready for garbage collection.
protected void	forEachThreadLocalInThread(ClassLoaderLeakPreventor preventor, Thread thread)
Class<? extends ClassLoaderPreMortemCleanUp>[]	mustBeBeforeMe() Needs to be done after StopThreadsCleanUp, since new ThreadLocals may be added when threads are shutting down.
protected void	processLeak(ClassLoaderLeakPreventor preventor, Thread thread, Reference<?> entry, ThreadLocal<?> threadLocal, Object value, String message) After having detected potential ThreadLocal leak, this method is called.
protected void	processThreadLocalMap(ClassLoaderLeakPreventor preventor, Thread thread, Object threadLocalMap)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

java_lang_Thread_threadLocals

protected Field java_lang_Thread_threadLocals

java_lang_Thread_inheritableThreadLocals

protected Field java_lang_Thread_inheritableThreadLocals

java_lang_ThreadLocal$ThreadLocalMap_table

protected Field java_lang_ThreadLocal$ThreadLocalMap_table

java_lang_ThreadLocal$ThreadLocalMap$Entry_value

protected Field java_lang_ThreadLocal$ThreadLocalMap$Entry_value

Constructor Detail

ThreadLocalCleanUp

public ThreadLocalCleanUp()

Method Detail

mustBeBeforeMe

public Class<? extends ClassLoaderPreMortemCleanUp>[] mustBeBeforeMe()

Needs to be done after StopThreadsCleanUp, since new ThreadLocals may be added when threads are shutting down.

Specified by:

mustBeBeforeMe in interface MustBeAfter<ClassLoaderPreMortemCleanUp>

cleanUp

public void cleanUp(ClassLoaderLeakPreventor preventor)

Description copied from interface: ClassLoaderPreMortemCleanUp

Perform cleanup actions needed to make provided ClassLoaderLeakPreventor.classLoader ready for garbage collection.

Specified by:

cleanUp in interface ClassLoaderPreMortemCleanUp

forEachThreadLocalInThread

protected void forEachThreadLocalInThread(ClassLoaderLeakPreventor preventor,
                                          Thread thread)

processThreadLocalMap

protected void processThreadLocalMap(ClassLoaderLeakPreventor preventor,
                                     Thread thread,
                                     Object threadLocalMap)
                              throws IllegalAccessException

Throws:

IllegalAccessException

processLeak

protected void processLeak(ClassLoaderLeakPreventor preventor,
                           Thread thread,
                           Reference<?> entry,
                           ThreadLocal<?> threadLocal,
                           Object value,
                           String message)

After having detected potential ThreadLocal leak, this method is called. Default implementation tries to clear the entry to avoid a leak.