InheritableThreadLocal

public class InheritableThreadLocal
extends ThreadLocal<T>

java.lang.Object
↳	java.lang.ThreadLocal<T>
	↳	java.lang.InheritableThreadLocal<T>

This class extends ThreadLocal to provide inheritance of values from parent thread to child thread: when a child thread is created, the child receives initial values for all inheritable thread-local variables for which the parent has values. Normally the child's values will be identical to the parent's; however, the child's value can be made an arbitrary function of the parent's by overriding the childValue method in this class.

Inheritable thread-local variables are used in preference to ordinary thread-local variables when the per-thread-attribute being maintained in the variable (e.g., User ID, Transaction ID) must be automatically transmitted to any child threads that are created.

Note: During the creation of a new thread, it is possible to opt out of receiving initial values for inheritable thread-local variables.

See also:

ThreadLocal

Summary

Public constructors
`InheritableThreadLocal()` Creates an inheritable thread local variable.

Protected methods
`T`	`childValue(T parentValue)` Computes the child's initial value for this inheritable thread-local variable as a function of the parent's value at the time the child thread is created.

Inherited methods

From class


        
          java.lang.ThreadLocal

`T`	`get()` Returns the value in the current thread's copy of this thread-local variable.
`T`	`initialValue()` Returns the current thread's "initial value" for this thread-local variable.
`void`	`remove()` Removes the current thread's value for this thread-local variable.
`void`	`set(T value)` Sets the current thread's copy of this thread-local variable to the specified value.
`static <S> ThreadLocal<S>`	`)">withInitial(Supplier<? extends S> supplier)` Creates a thread local variable.

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Public constructors