org.apache.beam.runners.samza.runtime

Class SamzaTimerInternalsFactory<K>

java.lang.Object

org.apache.beam.runners.samza.runtime.SamzaTimerInternalsFactory<K>

All Implemented Interfaces:

org.apache.beam.runners.core.TimerInternalsFactory<K>

public class SamzaTimerInternalsFactory<K>
extends java.lang.Object
implements org.apache.beam.runners.core.TimerInternalsFactory<K>

TimerInternalsFactory that creates Samza TimerInternals. This class keeps track of the TimerInternals.TimerData added to the sorted timer set, and removes the ready timers when the watermark is advanced.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SamzaTimerInternalsFactory.TimerKeyCoder<K> Coder for TimerKey.

Method Summary

Modifier and Type	Method and Description
org.joda.time.Instant	getInputWatermark()
org.joda.time.Instant	getOutputWatermark()
void	removeProcessingTimer(KeyedTimerData<K> keyedTimerData)
java.util.Collection<KeyedTimerData<K>>	removeReadyTimers() The method is called when watermark comes.
void	setInputWatermark(org.joda.time.Instant watermark)
void	setOutputWatermark(org.joda.time.Instant watermark)
org.apache.beam.runners.core.TimerInternals	timerInternalsForKey(K key)

Methods inherited from class java.lang.Object

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

Method Detail

timerInternalsForKey

public org.apache.beam.runners.core.TimerInternals timerInternalsForKey(K key)

Specified by:

timerInternalsForKey in interface org.apache.beam.runners.core.TimerInternalsFactory<K>

setInputWatermark

public void setInputWatermark(org.joda.time.Instant watermark)

setOutputWatermark

public void setOutputWatermark(org.joda.time.Instant watermark)

removeReadyTimers

public java.util.Collection<KeyedTimerData<K>> removeReadyTimers()

The method is called when watermark comes. It compares timers in memory buffer with watermark to prepare ready timers. When memory buffer is empty, it asks store to reload timers into buffer. note that the number of timers returned may be larger than memory buffer size.

Returns:

a collection of ready timers to be fired

removeProcessingTimer

public void removeProcessingTimer(KeyedTimerData<K> keyedTimerData)

getInputWatermark

public org.joda.time.Instant getInputWatermark()

getOutputWatermark

public org.joda.time.Instant getOutputWatermark()