org.janusgraph.diskstorage.keycolumnvalue.scan

Class EmptyScanJobFuture

java.lang.Object

org.janusgraph.diskstorage.keycolumnvalue.scan.EmptyScanJobFuture

All Implemented Interfaces:

Future<ScanMetrics>, ScanJobFuture

public class EmptyScanJobFuture
extends Object
implements ScanJobFuture

Constructor Summary

Constructors

Constructor and Description
EmptyScanJobFuture()

Method Summary

Modifier and Type	Method and Description
boolean	cancel(boolean mayInterruptIfRunning)
ScanMetrics	get()
ScanMetrics	get(long timeout, TimeUnit unit)
ScanMetrics	getIntermediateResult() Returns a set of potentially incomplete and still-changing metrics for this job.
boolean	isCancelled()
boolean	isDone()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

EmptyScanJobFuture

public EmptyScanJobFuture()

Method Detail

getIntermediateResult

public ScanMetrics getIntermediateResult()

Description copied from interface: ScanJobFuture

Returns a set of potentially incomplete and still-changing metrics for this job. This is not guaranteed to be the same object as the one returned by Future.get(), nor will the metrics visible through the object returned by this method necessarily eventually converge on the same values in the object returned by Future.get(), though the implementation should attempt to provide both properties when practical.

The metrics visible through the object returned by this method may also change their values between reads. In other words, this is not necessarily an immutable snapshot.

If the job has failed and the implementation is capable of quickly detecting that, then the implementation should throw an ExecutionException. Returning metrics in case of failure is acceptable, but throwing an exception is preferred.

Specified by:

getIntermediateResult in interface ScanJobFuture

Returns:

metrics for a potentially still-running job

cancel

public boolean cancel(boolean mayInterruptIfRunning)

Specified by:

cancel in interface Future<ScanMetrics>

isCancelled

public boolean isCancelled()

Specified by:

isCancelled in interface Future<ScanMetrics>

isDone

public boolean isDone()

Specified by:

isDone in interface Future<ScanMetrics>

get

public ScanMetrics get()
                throws InterruptedException,
                       ExecutionException

Specified by:

get in interface Future<ScanMetrics>

Throws:

InterruptedException

ExecutionException

get

public ScanMetrics get(long timeout,
                       TimeUnit unit)
                throws InterruptedException,
                       ExecutionException,
                       TimeoutException

Specified by:

get in interface Future<ScanMetrics>

Throws:

InterruptedException

ExecutionException

TimeoutException