org.mule.transport.polling.watermark.selector

Class ComparableWatermarkSelector

java.lang.Object

org.mule.transport.polling.watermark.selector.WatermarkSelector

org.mule.transport.polling.watermark.selector.ComparableWatermarkSelector

Direct Known Subclasses:

MaxValueWatermarkSelector, MinValueWatermarkSelector

public abstract class ComparableWatermarkSelector
extends WatermarkSelector

Base class for WatermarkSelectors that evaluate Comparable objects. When a non Comparable value is received, is is discarded.

Since:

3.5.0

Field Summary

Fields inherited from class org.mule.transport.polling.watermark.selector.WatermarkSelector

value

Constructor Summary

Constructors

Constructor and Description
ComparableWatermarkSelector()

Method Summary

Methods

Modifier and Type	Method and Description
void	acceptValue(Object value) Receives a value which is candidate to become the new watermark value.
protected abstract int	comparableQualifier() Returns an int value according to the Comparable contract (-1, 0, 1).

Methods inherited from class org.mule.transport.polling.watermark.selector.WatermarkSelector

getSelectedValue, reset

Methods inherited from class java.lang.Object

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

Constructor Detail

ComparableWatermarkSelector

public ComparableWatermarkSelector()

Method Detail

comparableQualifier

protected abstract int comparableQualifier()

Returns an int value according to the Comparable contract (-1, 0, 1). Then the result of the comparation matches this method's return value, then the selected value is updated

acceptValue

public final void acceptValue(Object value)

Description copied from class: WatermarkSelector

Receives a value which is candidate to become the new watermark value. No thread-safeness is guaranteed by this contract. It's up to each client/implementation to handle that

Specified by:

acceptValue in class WatermarkSelector