Package cl.obcom.desktopfx.util

Class ThreadSHA256

java.lang.Object

java.lang.ThreadLocal<MessageDigest>

cl.obcom.desktopfx.util.ThreadSHA256

public final class ThreadSHA256
extends ThreadLocal<MessageDigest>

Provides a SHA-256 MessageDigest local to the current running Thread.

Method Summary

Modifier and Type	Method	Description
static MessageDigest	getInstance()	Returns a SHA-256 MessageDigest instance local to current Thread.
protected MessageDigest	initialValue()	Returns the current thread's "initial value" for this thread-local variable.

Methods inherited from class java.lang.ThreadLocal

get, remove, set, withInitial

Methods inherited from class java.lang.Object

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

Method Details

initialValue

protected MessageDigest initialValue()

Returns the current thread's "initial value" for this thread-local variable. This method will be invoked the first time a thread accesses the variable with the ThreadLocal.get() method, unless the thread previously invoked the ThreadLocal.set(T) method, in which case the initialValue method will not be invoked for the thread. Normally, this method is invoked at most once per thread, but it may be invoked again in case of subsequent invocations of ThreadLocal.remove() followed by ThreadLocal.get().

Overrides:

initialValue in class ThreadLocal<MessageDigest>

Returns:

the initial value for this thread-local.

Throws:

InternalError - if an error occurs creating the initial value-

getInstance

public static MessageDigest getInstance()

Returns a SHA-256 MessageDigest instance local to current Thread.

Returns:

a SHA-256 MessageDigest instance local to current Thread.