org.apache.ignite.internal

Interface IgniteInternalFuture<R>

Type Parameters:

R - Type of the result for the future.

All Known Subinterfaces:

CacheQueryFuture<T>, GridCacheAtomicFuture<R>, GridCacheFuture<R>, GridCacheMvccFuture<T>, GridDhtFuture<T>, GridDhtTopologyFuture, GridNioFuture<R>

All Known Implementing Classes:

ComputeTaskInternalFuture, GridCacheDistributedFieldsQueryFuture, GridCacheDistributedQueryFuture, GridCacheLocalFieldsQueryFuture, GridCacheLocalQueryFuture, GridCacheMultiTxFuture, GridCacheQueryErrorFuture, GridCacheQueryFutureAdapter, GridCacheTxRecoveryFuture, GridCompoundFuture, GridCompoundIdentityFuture, GridDhtAssignmentFetchFuture, GridDhtAtomicUpdateFuture, GridDhtColocatedLockFuture, GridDhtEmbeddedFuture, GridDhtFinishedFuture, GridDhtForceKeysFuture, GridDhtGetFuture, GridDhtLockFuture, GridDhtPartitionsExchangeFuture, GridDhtTxFinishFuture, GridDhtTxPrepareFuture, GridEmbeddedFuture, GridFinishedFuture, GridFutureAdapter, GridLocalLockFuture, GridNearAtomicUpdateFuture, GridNearGetFuture, GridNearLockFuture, GridNearOptimisticTxPrepareFuture, GridNearPessimisticTxPrepareFuture, GridNearTxFinishFuture, GridNearTxPrepareFutureAdapter, GridNioEmbeddedFuture, GridNioFinishedFuture, GridNioFutureImpl, GridPartitionedGetFuture, GridServiceDeploymentFuture, GridWorkerFuture

public interface IgniteInternalFuture<R>

Extension for standard Future interface. It adds simplified exception handling, functional programming support and ability to listen for future completion via functional callback.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	cancel() Cancels this future.
<T> IgniteInternalFuture<T>	chain(IgniteClosure<? super IgniteInternalFuture<R>,T> doneCb) Make a chained future to convert result of this future (when complete) into a new format.
long	duration() Gets duration in milliseconds between start of the future and current time if future is not finished, or between start and finish of this future.
Throwable	error()
R	get() Synchronously waits for completion of the computation and returns computation result.
R	get(long timeout) Synchronously waits for completion of the computation for up to the timeout specified and returns computation result.
R	get(long timeout, TimeUnit unit) Synchronously waits for completion of the computation for up to the timeout specified and returns computation result.
boolean	isCancelled() Returns true if this computation was cancelled before it completed normally.
boolean	isDone() Checks if computation is done.
void	listen(IgniteInClosure<? super IgniteInternalFuture<R>> lsnr) Registers listener closure to be asynchronously notified whenever future completes.
R	result()
long	startTime() Gets start time for this future.

Method Detail

get

R get()
      throws IgniteCheckedException

Synchronously waits for completion of the computation and returns computation result.

Returns:

Computation result.

Throws:

IgniteInterruptedCheckedException - Subclass of IgniteCheckedException thrown if the wait was interrupted.

IgniteFutureCancelledCheckedException - Subclass of IgniteCheckedException throws if computation was cancelled.

IgniteCheckedException - If computation failed.

get

R get(long timeout)
      throws IgniteCheckedException

Synchronously waits for completion of the computation for up to the timeout specified and returns computation result. This method is equivalent to calling get(long, TimeUnit.MILLISECONDS).

Parameters:

timeout - The maximum time to wait in milliseconds.

Returns:

Computation result.

Throws:

IgniteInterruptedCheckedException - Subclass of IgniteCheckedException thrown if the wait was interrupted.

IgniteFutureTimeoutCheckedException - Subclass of IgniteCheckedException thrown if the wait was timed out.

IgniteFutureCancelledCheckedException - Subclass of IgniteCheckedException throws if computation was cancelled.

IgniteCheckedException - If computation failed.

get

R get(long timeout,
    TimeUnit unit)
      throws IgniteCheckedException

Synchronously waits for completion of the computation for up to the timeout specified and returns computation result.

Parameters:

timeout - The maximum time to wait.

unit - The time unit of the timeout argument.

Returns:

Computation result.

Throws:

IgniteInterruptedCheckedException - Subclass of IgniteCheckedException thrown if the wait was interrupted.

IgniteFutureTimeoutCheckedException - Subclass of IgniteCheckedException thrown if the wait was timed out.

IgniteFutureCancelledCheckedException - Subclass of IgniteCheckedException throws if computation was cancelled.

IgniteCheckedException - If computation failed.

cancel

boolean cancel()
               throws IgniteCheckedException

Cancels this future.

Returns:

True if future was canceled (i.e. was not finished prior to this call).

Throws:

IgniteCheckedException - If cancellation failed.

isDone

boolean isDone()

Checks if computation is done.

Returns:

True if computation is done, false otherwise.

isCancelled

boolean isCancelled()

Returns true if this computation was cancelled before it completed normally.

Returns:

True if this computation was cancelled before it completed normally.

startTime

long startTime()

Gets start time for this future.

Returns:

Start time for this future.

duration

long duration()

Gets duration in milliseconds between start of the future and current time if future is not finished, or between start and finish of this future.

Returns:

Time in milliseconds this future has taken to execute.

listen

void listen(IgniteInClosure<? super IgniteInternalFuture<R>> lsnr)

Registers listener closure to be asynchronously notified whenever future completes.

Parameters:

lsnr - Listener closure to register. If not provided - this method is no-op.

chain

<T> IgniteInternalFuture<T> chain(IgniteClosure<? super IgniteInternalFuture<R>,T> doneCb)

Make a chained future to convert result of this future (when complete) into a new format. It is guaranteed that done callback will be called only ONCE.

Parameters:

doneCb - Done callback that is applied to this future when it finishes to produce chained future result.

Returns:

Chained future that finishes after this future completes and done callback is called.

error

Throwable error()

Returns:

Error value if future has already been completed with error.

result

R result()

Returns:

Result value if future has already been completed normally.