org.glowroot.agent.plugin.api.util

Class FastThreadLocal<T>

java.lang.Object

org.glowroot.agent.plugin.api.util.FastThreadLocal<T>

public class FastThreadLocal<T>
extends Object

Wrapper that implements optimized ThreadLocal access pattern ideal for heavily used ThreadLocals. It is faster to use a mutable holder object and always perform ThreadLocal.get() and never use ThreadLocal.set(), because the value is more likely to be found in the ThreadLocalMap direct hash slot and avoid the slow path ThreadLocalMap.getEntryAfterMiss(). Important: this thread local will live in ThreadLocalMap forever, so use with care.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	FastThreadLocal.Holder<T>

Constructor Summary

Constructors

Constructor and Description
FastThreadLocal()

Method Summary

Modifier and Type	Method and Description
T	get()
FastThreadLocal.Holder<T>	getHolder()
protected T	initialValue()
void	set(T value)

Methods inherited from class java.lang.Object

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

Constructor Detail

FastThreadLocal

public FastThreadLocal()

Method Detail

get

public T get()

getHolder

public FastThreadLocal.Holder<T> getHolder()

initialValue

protected T initialValue()

set

public void set(T value)