RunnableFutureTask

Kotlin |Java

@UnstableApi
public abstract class RunnableFutureTask<R, E extends Exception> implements RunnableFuture

A RunnableFuture that supports additional uninterruptible operations to query whether execution has started and finished.

Parameters
`<R>`	The type of the result.
`<E extends Exception>`	The type of any `ExecutionException` cause.

Summary

Protected constructors
`RunnableFutureTask()`

Public methods
`final void`	`blockUntilFinished()` Blocks until the task has finished, or has been canceled without having been started.
`final void`	`blockUntilStarted()` Blocks until the task has started, or has been canceled without having been started.
`final boolean`	`cancel(boolean interruptIfRunning)`
`final R`	`@UnknownNull get()`
`final R`	`@UnknownNull get(long timeout, TimeUnit unit)`
`final boolean`	`isCancelled()`
`final boolean`	`isDone()`
`final void`	`run()`

Protected methods
`void`	`cancelWork()` Cancels any work being done by `doWork`.
`abstract R`	`@UnknownNull doWork()` Performs the work or computation.

Inherited methods

From java.util.concurrent.Future

`Throwable`	`exceptionNow()`
`V`	`resultNow()`
`Future.State`	`state()`

Protected constructors

RunnableFutureTask

protected RunnableFutureTask()

Public methods

blockUntilFinished

public final void blockUntilFinished()

Blocks until the task has finished, or has been canceled without having been started.

blockUntilStarted

public final void blockUntilStarted()

Blocks until the task has started, or has been canceled without having been started.

cancel

public final boolean cancel(boolean interruptIfRunning)

get

@UnknownNull
public final R get()

Throws
`java.util.concurrent.ExecutionException`
`java.lang.InterruptedException`

get

@UnknownNull
public final R get(long timeout, TimeUnit unit)

Throws
`java.util.concurrent.ExecutionException`
`java.lang.InterruptedException`
`java.util.concurrent.TimeoutException`

isCancelled

public final boolean isCancelled()

isDone

public final boolean isDone()

run

public final void run()

Protected methods

cancelWork

protected void cancelWork()

Cancels any work being done by doWork. If doWork is currently executing then the thread on which it's executing may be interrupted immediately after this method returns.

The default implementation does nothing.

doWork

@UnknownNull
protected abstract R doWork()

Performs the work or computation.

Returns
`R`	The computed result.

Throws
`E`	If an error occurred.