org.apache.flink.streaming.runtime.operators

Interface Triggerable

All Known Implementing Classes:

AbstractAlignedProcessingTimeWindowOperator, AccumulatingProcessingTimeWindowOperator, AggregatingProcessingTimeWindowOperator, EvictingWindowOperator, ExtractTimestampsOperator, TimestampsAndPeriodicWatermarksOperator, WindowOperator

@Internal
public interface Triggerable

This interface must be implemented by objects that are triggered by the timer service available to stream operators in StreamExecutionEnvironment.

Method Summary

Modifier and Type	Method and Description
void	trigger(long timestamp) This method is invoked with the timestamp for which the trigger was scheduled.

Method Detail

trigger

void trigger(long timestamp)
      throws Exception

This method is invoked with the timestamp for which the trigger was scheduled.

If the triggering is delayed for whatever reason (trigger timer was blocked, JVM stalled due to a garbage collection), the timestamp supplied to this function will still be the original timestamp for which the trigger was scheduled.

Parameters:

timestamp - The timestamp for which the trigger event was scheduled.

Throws:

Exception