io.crate.executor.task

Class NoopTask

java.lang.Object

io.crate.executor.task.NoopTask

All Implemented Interfaces:

Task

public class NoopTask
extends java.lang.Object
implements Task

Field Summary

Fields

Modifier and Type	Field and Description
static NoopTask	INSTANCE_EMPTY_RESULT
static NoopTask	INSTANCE_ZERO_ROWS

Method Summary

Modifier and Type	Method and Description
java.util.List<? extends com.google.common.util.concurrent.ListenableFuture<TaskResult>>	result() Get the result of the task execution as a list of ListenableFuture instances.
void	start() start the execution
void	upstreamResult(java.util.List<? extends com.google.common.util.concurrent.ListenableFuture<TaskResult>> result) let this class get to know the result of the former ("upstream") task

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE_EMPTY_RESULT

public static final NoopTask INSTANCE_EMPTY_RESULT

INSTANCE_ZERO_ROWS

public static final NoopTask INSTANCE_ZERO_ROWS

Method Detail

start

public void start()

Description copied from interface: Task

start the execution

Specified by:

start in interface Task

result

public java.util.List<? extends com.google.common.util.concurrent.ListenableFuture<TaskResult>> result()

Description copied from interface: Task

Get the result of the task execution as a list of ListenableFuture instances. This method may be called before Task.start() is called.

Specified by:

result in interface Task

upstreamResult

public void upstreamResult(java.util.List<? extends com.google.common.util.concurrent.ListenableFuture<TaskResult>> result)

Description copied from interface: Task

let this class get to know the result of the former ("upstream") task

Specified by:

upstreamResult in interface Task

Parameters:

result - the result of the "upstream" task.