com.google.cloud.dataflow.sdk.util

Class ExecutableTrigger<W extends BoundedWindow>

java.lang.Object

com.google.cloud.dataflow.sdk.util.ExecutableTrigger<W>

Type Parameters:

W - BoundedWindow subclass used to represent the windows used.

All Implemented Interfaces:

Serializable

public class ExecutableTrigger<W extends BoundedWindow>
extends Object
implements Serializable

A wrapper around a trigger used during execution. While an actual trigger may appear multiple times (both in the same trigger expression and in other trigger expressions), the ExecutableTrigger wrapped around them forms a tree (only one occurrence).

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
static <W extends BoundedWindow> ExecutableTrigger<W>	create(Trigger<W> trigger)
static <W extends BoundedWindow> ExecutableTrigger<W>	createForOnceTrigger(Trigger.OnceTrigger<W> trigger, int nextUnusedIndex)
int	getFirstIndexAfterSubtree()
Trigger<W>	getSpec() Return the underlying trigger specification corresponding to this ExecutableTrigger.
ExecutableTrigger<W>	getSubTriggerContaining(int index)
int	getTriggerIndex()
void	invokeClear(Trigger.TriggerContext c) Invoke clear for the current this trigger.
Trigger.TriggerResult	invokeElement(Trigger.OnElementContext c) Invoke the Trigger.onElement(com.google.cloud.dataflow.sdk.transforms.windowing.Trigger<W>.OnElementContext) method for this trigger, ensuring that the bits are properly updated if the trigger finishes.
Trigger.MergeResult	invokeMerge(Trigger.OnMergeContext c) Invoke the Trigger.onMerge(com.google.cloud.dataflow.sdk.transforms.windowing.Trigger<W>.OnMergeContext) method for this trigger, ensuring that the bits are properly updated.
Trigger.TriggerResult	invokeTimer(Trigger.OnTimerContext c) Invoke the Trigger.onTimer(com.google.cloud.dataflow.sdk.transforms.windowing.Trigger<W>.OnTimerContext) method for this trigger, ensuring that the bits are properly updated if the trigger finishes.
boolean	isCompatible(ExecutableTrigger<W> other)
List<ExecutableTrigger<W>>	subTriggers()
String	toString()

Methods inherited from class java.lang.Object

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

Method Detail

create

public static <W extends BoundedWindow> ExecutableTrigger<W> create(Trigger<W> trigger)

createForOnceTrigger

public static <W extends BoundedWindow> ExecutableTrigger<W> createForOnceTrigger(Trigger.OnceTrigger<W> trigger,
                                                                                  int nextUnusedIndex)

subTriggers

public List<ExecutableTrigger<W>> subTriggers()

toString

public String toString()

Overrides:

toString in class Object

getSpec

public Trigger<W> getSpec()

Return the underlying trigger specification corresponding to this ExecutableTrigger.

getTriggerIndex

public int getTriggerIndex()

getFirstIndexAfterSubtree

public final int getFirstIndexAfterSubtree()

isCompatible

public boolean isCompatible(ExecutableTrigger<W> other)

getSubTriggerContaining

public ExecutableTrigger<W> getSubTriggerContaining(int index)

invokeElement

public Trigger.TriggerResult invokeElement(Trigger.OnElementContext c)
                                    throws Exception

Invoke the Trigger.onElement(com.google.cloud.dataflow.sdk.transforms.windowing.Trigger<W>.OnElementContext) method for this trigger, ensuring that the bits are properly updated if the trigger finishes.

Throws:

Exception

invokeTimer

public Trigger.TriggerResult invokeTimer(Trigger.OnTimerContext c)
                                  throws Exception

Invoke the Trigger.onTimer(com.google.cloud.dataflow.sdk.transforms.windowing.Trigger<W>.OnTimerContext) method for this trigger, ensuring that the bits are properly updated if the trigger finishes.

Throws:

Exception

invokeMerge

public Trigger.MergeResult invokeMerge(Trigger.OnMergeContext c)
                                throws Exception

Invoke the Trigger.onMerge(com.google.cloud.dataflow.sdk.transforms.windowing.Trigger<W>.OnMergeContext) method for this trigger, ensuring that the bits are properly updated.

Throws:

Exception

invokeClear

public void invokeClear(Trigger.TriggerContext c)
                 throws Exception

Invoke clear for the current this trigger.

Throws:

Exception