Module org.elasticsearch.server

Package org.elasticsearch.cluster.routing.allocation.allocator

Class ContinuousComputation<T>

java.lang.Object

org.elasticsearch.cluster.routing.allocation.allocator.ContinuousComputation<T>

public abstract class ContinuousComputation<T>
extends Object

Asynchronously runs some computation using at most one thread but expects the input value changes over time as it's running. Newer input values are assumed to be fresher and trigger a recomputation. If a computation never starts before a fresher value arrives then it is skipped.

Constructor Summary

Constructors

Constructor	Description
ContinuousComputation(Executor executor)

Method Summary

Modifier and Type	Method	Description
protected boolean	isFresh(T input)
void	onNewInput(T input)	Called when the input value has changed.
protected abstract void	processInput(T input)	Process the given input.

Methods inherited from class java.lang.Object

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

Constructor Details

ContinuousComputation

public ContinuousComputation(Executor executor)

Parameters:

executor - the Executor with which to execute the computation

Method Details

onNewInput

public void onNewInput(T input)

Called when the input value has changed. If no newer value is received then eventually either the computation will run on this value.

isFresh

protected boolean isFresh(T input)

Returns:

true iff the given input is the latest known input.

processInput

protected abstract void processInput(T input)

Process the given input.

Parameters:

input - the value that was last received by onNewInput(T) before invocation.