org.apache.calcite.util

Class TryThreadLocal<T>

java.lang.Object

java.lang.ThreadLocal<T>

org.apache.calcite.util.TryThreadLocal<T>

Type Parameters:

T - Value type

public class TryThreadLocal<T>
extends ThreadLocal<T>

Thread-local variable that returns a handle that can be closed.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	TryThreadLocal.Memo Remembers to set the value back.

Field Summary

Fields

Modifier and Type	Field and Description
private T	initialValue

Constructor Summary

Constructors

Modifier	Constructor and Description
private	TryThreadLocal(T initialValue)

Method Summary

Modifier and Type	Method and Description
protected T	initialValue()
static <T> TryThreadLocal<T>	of(T initialValue) Creates a TryThreadLocal.
TryThreadLocal.Memo	push(T value) Assigns the value as value for the current thread.

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

Field Detail

initialValue

private final T initialValue

Constructor Detail

TryThreadLocal

private TryThreadLocal(T initialValue)

Method Detail

of

public static <T> TryThreadLocal<T> of(T initialValue)

Creates a TryThreadLocal.

Parameters:

initialValue - Initial value

initialValue

protected final T initialValue()

Overrides:

initialValue in class ThreadLocal<T>

push

public TryThreadLocal.Memo push(T value)

Assigns the value as value for the current thread. Returns a TryThreadLocal.Memo which, when closed, will assign the value back to the previous value.