com.groiss.ds

Class ThreadLocal2<T>

java.lang.Object

java.lang.ThreadLocal<T>

com.groiss.ds.ThreadLocal2<T>

public class ThreadLocal2<T>
extends java.lang.ThreadLocal<T>

Same as java.lang.ThreadLocal, plus monitoring utility

Constructor Summary

Constructors

Constructor and Description
ThreadLocal2() Creates a ThreadLocal variable.

Method Summary

Methods

Modifier and Type	Method and Description
T	get() Returns the value in the calling thread's copy of this ThreadLocal variable.
java.util.Map<java.lang.Thread,T>	getThreads() Returns the HashMap, keys are the threads
protected T	initialValue() Returns the calling thread's initial value for this ThreadLocal variable.
void	remove()
void	set(T value) Sets the calling thread's instance of this ThreadLocal variable to the given value.

Methods inherited from class java.lang.Object

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

Constructor Detail

ThreadLocal2

public ThreadLocal2()

Creates a ThreadLocal variable.

Method Detail

initialValue

protected T initialValue()

Returns the calling thread's initial value for this ThreadLocal variable. This method will be called once per accessing thread for each ThreadLocal, the first time each thread accesses the variable with get or set. If the programmer desires ThreadLocal variables to be initialized to some value other than null, ThreadLocal must be subclassed, and this method overridden. Typically, an anonymous inner class will be used. Typical implementations of initialValue will call an appropriate constructor and return the newly constructed object.

Overrides:

initialValue in class java.lang.ThreadLocal<T>

Returns:

the initial value for this ThreadLocal

get

public T get()

Returns the value in the calling thread's copy of this ThreadLocal variable. Creates and initializes the copy if this is the first time the thread has called this method.

Overrides:

get in class java.lang.ThreadLocal<T>

Returns:

the value of this ThreadLocal

set

public void set(T value)

Sets the calling thread's instance of this ThreadLocal variable to the given value. This is only used to change the value from the one assigned by the initialValue method, and many applications will have no need for this functionality.

Overrides:

set in class java.lang.ThreadLocal<T>

Parameters:

value - the value to be stored in the calling threads' copy of this ThreadLocal.

getThreads

public java.util.Map<java.lang.Thread,T> getThreads()

Returns the HashMap, keys are the threads

Returns:

the HashMap of values

remove

public void remove()

Overrides:

remove in class java.lang.ThreadLocal<T>