java.lang
Class InheritableThreadLocal
java.lang.Object
java.lang.ThreadLocal
java.lang.InheritableThreadLocal
public class InheritableThreadLocal
- extends ThreadLocal
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.
- Since:
- 1.2
- Version:
- 1.17, 03/12/05
- Author:
- Josh Bloch and Doug Lea
- See Also:
ThreadLocal
InheritableThreadLocal
public InheritableThreadLocal()