1 *java.lang.InheritableThreadLocal* *InheritableThreadLocal* This class extends T
3 public class InheritableThreadLocal
4 extends |java.lang.ThreadLocal|
6 |java.lang.InheritableThreadLocal_Description|
7 |java.lang.InheritableThreadLocal_Fields|
8 |java.lang.InheritableThreadLocal_Constructors|
9 |java.lang.InheritableThreadLocal_Methods|
11 ================================================================================
13 *java.lang.InheritableThreadLocal_Constructors*
14 |java.lang.InheritableThreadLocal()|
16 *java.lang.InheritableThreadLocal_Methods*
17 |java.lang.InheritableThreadLocal.childValue(T)|Computes the child's initial va
19 *java.lang.InheritableThreadLocal_Description*
21 This class extends ThreadLocal to provide inheritance of values from parent
22 thread to child thread: when a child thread is created, the child receives
23 initial values for all inheritable thread-local variables for which the parent
24 has values. Normally the child's values will be identical to the parent's;
25 however, the child's value can be made an arbitrary function of the parent's by
26 overriding the childValue method in this class.
28 Inheritable thread-local variables are used in preference to ordinary
29 thread-local variables when the per-thread-attribute being maintained in the
30 variable (e.g., User ID, Transaction ID) must be automatically transmitted to
31 any child threads that are created.
34 *java.lang.InheritableThreadLocal()*
36 public InheritableThreadLocal()
41 *java.lang.InheritableThreadLocal.childValue(T)*
43 protected |java.lang.Object| childValue(java.lang.Object parentValue)
45 Computes the child's initial value for this inheritable thread-local variable
46 as a function of the parent's value at the time the child thread is created.
47 This method is called from within the parent thread before the child is
50 This method merely returns its input argument, and should be overridden if a
51 different behavior is desired.
53 parentValue - the parent thread's value
55 Returns: the child thread's initial value