Skip to content

Most visited

Recently visited

navigation

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.

See also:

Summary

Public constructors

InheritableThreadLocal()

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
From class java.lang.Object

Public constructors

InheritableThreadLocal

added in API level 1
InheritableThreadLocal ()

Protected methods

childValue

added in API level 1
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. This method is called from within the parent thread before the child is started.

This method merely returns its input argument, and should be overridden if a different behavior is desired.

Parameters
parentValue T: the parent thread's value

Returns
T the child thread's initial value

This site uses cookies to store your preferences for site-specific language and display options.

Get the latest Android developer news and tips that will help you find success on Google Play.

* Required Fields

Hooray!

Follow Google Developers on WeChat

Browse this site in ?

You requested a page in , but your language preference for this site is .

Would you like to change your language preference and browse this site in ? If you want to change your language preference later, use the language menu at the bottom of each page.

This class requires API level or higher

This doc is hidden because your selected API level for the documentation is . You can change the documentation API level with the selector above the left navigation.

For more information about specifying the API level your app requires, read Supporting Different Platform Versions.

Take a short survey?
Help us improve the Android developer experience. (Dec 2017 Android Platform & Tools Survey)