org.mule.transport.polling.watermark.selector

Class WatermarkSelector

java.lang.Object

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

Direct Known Subclasses:

ComparableWatermarkSelector, FirstItemWatermarkSelector, LastItemWatermarkSelector, WatermarkSelectorWrapper

public abstract class WatermarkSelector
extends Object

A watermark selector receives values and selects which one should be the new watermark value

Since:

3.5.0

Field Summary

Fields

Modifier and Type	Field and Description
protected Object	value The selected value

Constructor Summary

Constructors

Constructor and Description
WatermarkSelector()

Method Summary

Methods

Modifier and Type	Method and Description
abstract void	acceptValue(Object value) Receives a value which is candidate to become the new watermark value.
Object	getSelectedValue() Returns the selected value.
void	reset() Returns this selector to a blank state so that it can be reused

Methods inherited from class java.lang.Object

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

Field Detail

value

protected Object value

The selected value

Constructor Detail

WatermarkSelector

public WatermarkSelector()

Method Detail

acceptValue

public abstract void acceptValue(Object value)

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

getSelectedValue

public Object getSelectedValue()

Returns the selected value. This contract does not guarantee idempotency. Continuous invocations to this method might return different values if acceptValue(Object) is invoked in between. Thread-safeness is also not guaranteed by this contract

Returns:

the selected value

reset

public void reset()

Returns this selector to a blank state so that it can be reused