boolean function ( ) { return false ; }
returns true if this trigger supports merging of trigger state and can therefore be used with a org.apache.flink.streaming.api.windowing.assigners.mergingwindowassigner . if this returns true you must properly implement #onmerge window , onmergecontext concode_field_sep long serialVersionUID concode_field_sep long getCurrentWatermark concode_elem_sep TriggerResult onEventTime concode_elem_sep TriggerResult onProcessingTime concode_elem_sep S getPartitionedState concode_elem_sep void clear concode_elem_sep void onMerge concode_elem_sep ValueState<S> getKeyValueState concode_elem_sep ValueState<S> getKeyValueState concode_elem_sep MetricGroup getMetricGroup concode_elem_sep void deleteProcessingTimeTimer concode_elem_sep long getCurrentProcessingTime concode_elem_sep void deleteEventTimeTimer concode_elem_sep TriggerResult onElement concode_elem_sep void mergePartitionedState concode_elem_sep void registerEventTimeTimer concode_elem_sep void registerProcessingTimeTimer