Package org.apache.poi.util

Class ThreadLocalUtil

java.lang.Object

org.apache.poi.util.ThreadLocalUtil

public class ThreadLocalUtil
extends Object

Small utility to allow to remove references held in ThreadLocals. This is sometimes necessary, e.g. when returning threads into a global thread pool. For each usage of ThreadLocal, a cleaner is registered via registerCleaner().

Method Summary

Modifier and Type	Method	Description
static void	clearAllThreadLocals()	Clear ThreadLocals of the current thread.
static void	registerCleaner(Runnable cleaner)	Intended for internal use only so other modules of Apache POi can add cleaners.

Methods inherited from class java.lang.Object

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

Method Detail

clearAllThreadLocals

public static void clearAllThreadLocals()

Clear ThreadLocals of the current thread. This can be used to clean out a thread before "returning" it to a thread-pool or a Web-Container like Tomcat. Usually org.apache.xmlbeans.ThreadLocalUtil#clearAllThreadLocals() should be called as well to clear out some more ThreadLocals which are created by the XMLBeans library internally.

registerCleaner

@Internal
public static void registerCleaner(Runnable cleaner)

Intended for internal use only so other modules of Apache POi can add cleaners.

Parameters:

cleaner - a runnable which clears some thread-local that is located outside of the "poi" module.