Most visited

Recently visited

Results for

Added in API level 21

ForkJoinWorkerThread

public class ForkJoinWorkerThread
extends Thread

java.lang.Object
↳	java.lang.Thread
	↳	java.util.concurrent.ForkJoinWorkerThread

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.ForkJoinWorkerThreadFactory to use it in a ForkJoinPool.

Summary

Inherited constants

From class


    java.lang.Thread

Protected constructors
`ForkJoinWorkerThread(ForkJoinPool pool)` Creates a ForkJoinWorkerThread operating in the given pool.

Public methods
`ForkJoinPool`	`getPool()` Returns the pool hosting this thread.
`int`	`getPoolIndex()` Returns the unique index number of this thread in its pool.
`void`	`run()` This method is required to be public, but should never be called explicitly.

Protected methods
`void`	`onStart()` Initializes internal state after construction but before processing any tasks.
`void`	`onTermination(Throwable exception)` Performs cleanup associated with termination of this worker thread.

Inherited methods

From class


  
    java.lang.Thread

`static int`	`activeCount()` Returns an estimate of the number of active threads in the current thread's thread group and its subgroups.
`final void`	`checkAccess()` Determines if the currently running thread has permission to modify this thread.
`Object`	`clone()` Throws CloneNotSupportedException as a Thread can not be meaningfully cloned.
`int`	`countStackFrames()` This method was deprecated in API level 1. The definition of this call depends on `suspend()`, which is deprecated. Further, the results of this call were never well-defined.
`static Thread`	`currentThread()` Returns a reference to the currently executing thread object.
`void`	`destroy()` This method was deprecated in API level 1. This method was originally designed to destroy this thread without any cleanup. Any monitors it held would have remained locked. However, the method was never implemented. If if were to be implemented, it would be deadlock-prone in much the manner of `suspend()`. If the target thread held a lock protecting a critical system resource when it was destroyed, no thread could ever access this resource again. If another thread ever attempted to lock this resource, deadlock would result. Such deadlocks typically manifest themselves as "frozen" processes. For more information, see Why are Thread.stop, Thread.suspend and Thread.resume Deprecated?.
`static void`	`dumpStack()` Prints a stack trace of the current thread to the standard error stream.
`static int`	`enumerate(Thread[] tarray)` Copies into the specified array every active thread in the current thread's thread group and its subgroups.
`static Map<Thread, StackTraceElement[]>`	`getAllStackTraces()` Returns a map of stack traces for all live threads.
`ClassLoader`	`getContextClassLoader()` Returns the context ClassLoader for this Thread.
`static Thread.UncaughtExceptionHandler`	`getDefaultUncaughtExceptionHandler()` Returns the default handler invoked when a thread abruptly terminates due to an uncaught exception.
`long`	`getId()` Returns the identifier of this Thread.
`final String`	`getName()` Returns this thread's name.
`final int`	`getPriority()` Returns this thread's priority.
`StackTraceElement[]`	`getStackTrace()` Returns an array of stack trace elements representing the stack dump of this thread.
`Thread.State`	`getState()` Returns the state of this thread.
`final ThreadGroup`	`getThreadGroup()` Returns the thread group to which this thread belongs.
`Thread.UncaughtExceptionHandler`	`getUncaughtExceptionHandler()` Returns the handler invoked when this thread abruptly terminates due to an uncaught exception.
`static boolean`	`holdsLock(Object obj)` Returns `true` if and only if the current thread holds the monitor lock on the specified object.
`void`	`interrupt()` Interrupts this thread.
`static boolean`	`interrupted()` Tests whether the current thread has been interrupted.
`final boolean`	`isAlive()` Tests if this thread is alive.
`final boolean`	`isDaemon()` Tests if this thread is a daemon thread.
`boolean`	`isInterrupted()` Tests whether this thread has been interrupted.
`final void`	`join()` Waits for this thread to die.
`final void`	`join(long millis)` Waits at most `millis` milliseconds for this thread to die.
`final void`	`join(long millis, int nanos)` Waits at most `millis` milliseconds plus `nanos` nanoseconds for this thread to die.
`final void`	`resume()` This method was deprecated in API level 1. This method exists solely for use with `suspend()`, which has been deprecated because it is deadlock-prone. For more information, see Why are Thread.stop, Thread.suspend and Thread.resume Deprecated?.
`void`	`run()` If this thread was constructed using a separate `Runnable` run object, then that `Runnable` object's `run` method is called; otherwise, this method does nothing and returns.
`void`	`setContextClassLoader(ClassLoader cl)` Sets the context ClassLoader for this Thread.
`final void`	`setDaemon(boolean on)` Marks this thread as either a daemon thread or a user thread.
`static void`	`setDefaultUncaughtExceptionHandler(Thread.UncaughtExceptionHandler eh)` Set the default handler invoked when a thread abruptly terminates due to an uncaught exception, and no other handler has been defined for that thread.
`final void`	`setName(String name)` Changes the name of this thread to be equal to the argument `name`.
`final void`	`setPriority(int newPriority)` Changes the priority of this thread.
`void`	`setUncaughtExceptionHandler(Thread.UncaughtExceptionHandler eh)` Set the handler invoked when this thread abruptly terminates due to an uncaught exception.
`static void`	`sleep(long millis, int nanos)` Causes the currently executing thread to sleep (temporarily cease execution) for the specified number of milliseconds plus the specified number of nanoseconds, subject to the precision and accuracy of system timers and schedulers.
`static void`	`sleep(long millis)` Causes the currently executing thread to sleep (temporarily cease execution) for the specified number of milliseconds, subject to the precision and accuracy of system timers and schedulers.
`void`	`start()` Causes this thread to begin execution; the Java Virtual Machine calls the `run` method of this thread.
`final void`	`stop()` This method was deprecated in API level 1. This method is inherently unsafe. Stopping a thread with Thread.stop causes it to unlock all of the monitors that it has locked (as a natural consequence of the unchecked `ThreadDeath` exception propagating up the stack). If any of the objects previously protected by these monitors were in an inconsistent state, the damaged objects become visible to other threads, potentially resulting in arbitrary behavior. Many uses of `stop` should be replaced by code that simply modifies some variable to indicate that the target thread should stop running. The target thread should check this variable regularly, and return from its run method in an orderly fashion if the variable indicates that it is to stop running. If the target thread waits for long periods (on a condition variable, for example), the `interrupt` method should be used to interrupt the wait. For more information, see Why are Thread.stop, Thread.suspend and Thread.resume Deprecated?.
`final void`	`stop(Throwable obj)` This method was deprecated in API level 1. This method is inherently unsafe. See `stop()` for details. An additional danger of this method is that it may be used to generate exceptions that the target thread is unprepared to handle (including checked exceptions that the thread could not possibly throw, were it not for this method). For more information, see Why are Thread.stop, Thread.suspend and Thread.resume Deprecated?.
`final void`	`suspend()` This method was deprecated in API level 1. This method has been deprecated, as it is inherently deadlock-prone. If the target thread holds a lock on the monitor protecting a critical system resource when it is suspended, no thread can access this resource until the target thread is resumed. If the thread that would resume the target thread attempts to lock this monitor prior to calling `resume`, deadlock results. Such deadlocks typically manifest themselves as "frozen" processes. For more information, see Why are Thread.stop, Thread.suspend and Thread.resume Deprecated?.
`String`	`toString()` Returns a string representation of this thread, including the thread's name, priority, and thread group.
`static void`	`yield()` A hint to the scheduler that the current thread is willing to yield its current use of a processor.

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 millis, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long millis)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

From interface


  
    java.lang.Runnable

Protected constructors

ForkJoinWorkerThread

Added in API level 21

ForkJoinWorkerThread (ForkJoinPool pool)

Creates a ForkJoinWorkerThread operating in the given pool.

Parameters
`pool`	`ForkJoinPool`: the pool this thread works in

Throws
`NullPointerException`	if pool is null

Public methods

getPool

Added in API level 21

ForkJoinPool getPool ()

Returns the pool hosting this thread.

Returns
`ForkJoinPool`	the pool

getPoolIndex

Added in API level 21

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.

Returns
`int`	the index number

run

Added in API level 21

void run ()

This method is required to be public, but should never be called explicitly. It performs the main run loop to execute ForkJoinTasks.

Protected methods

onStart

Added in API level 21

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.

onTermination

Added in API level 21

void onTermination (Throwable exception)

Performs cleanup associated with termination of this worker thread. If you override this method, you must invoke super.onTermination at the end of the overridden method.

Parameters
`exception`	`Throwable`: the exception causing this thread to abort due to an unrecoverable error, or `null` if completed normally

Interfaces

Classes

Enums

Exceptions

Most visited

Recently visited

Results for

ForkJoinWorkerThread

Summary

Inherited constants

Protected constructors

Public methods

Protected methods

Inherited methods

Protected constructors

ForkJoinWorkerThread

Public methods

getPool

getPoolIndex

run

Protected methods

onStart

onTermination