- All Implemented Interfaces:
public class ForkJoinWorkerThread extends Thread
A thread managed by a
ForkJoinPool, which executes
ForkJoinTasks. This class is subclassable solely for the sake of adding functionality -- there are no overridable methods dealing with scheduling or execution. However, you can override initialization and termination methods surrounding the main task processing loop. If you do create such a subclass, you will also need to supply a custom
ForkJoinPool.ForkJoinWorkerThreadFactoryto use it in a
Nested Class Summary
Nested classes/interfaces declared in class java.lang.Thread
Fields declared in class java.lang.Thread
MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY
protectedCreates a ForkJoinWorkerThread operating in the given pool.
Method SummaryModifier and TypeMethodDescription
getPool()Returns the pool hosting this thread.
intReturns the unique index number of this thread in its pool.
onStart()Initializes internal state after construction but before processing any tasks.
(Throwable exception)Performs cleanup associated with termination of this worker thread.
run()This method is required to be public, but should never be called explicitly.
Methods declared in class java.lang.Thread
activeCount, checkAccess, clone, countStackFrames, currentThread, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, onSpinWait, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, suspend, toString, yield
(ForkJoinPool pool)Creates a ForkJoinWorkerThread operating in the given pool.
pool- the pool this thread works in
NullPointerException- if pool is null
getPoolpublic ForkJoinPool getPool()Returns the pool hosting this thread.
- the pool
getPoolIndexpublic int getPoolIndex()Returns the unique index number of this thread in its pool. The returned value ranges from zero to the maximum number of threads (minus one) that may exist in the pool, and does not change during the lifetime of the thread. This method may be useful for applications that track status or collect results per-worker-thread rather than per-task.
- the index number
onStartprotected void onStart()Initializes internal state after construction but before processing any tasks. If you override this method, you must invoke
super.onStart()at the beginning of the method. Initialization requires care: Most fields must have legal default values, to ensure that attempted accesses from other threads work correctly even before this thread starts processing tasks.
onTerminationprotected void onTermination
(Throwable exception)Performs cleanup associated with termination of this worker thread. If you override this method, you must invoke
super.onTerminationat the end of the overridden method.
exception- the exception causing this thread to abort due to an unrecoverable error, or
nullif completed normally
runpublic void run()This method is required to be public, but should never be called explicitly. It performs the main run loop to execute
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