org.wso2.siddhi.core.query.selector.attribute.aggregator.incremental

Class IncrementalDataAggregator

java.lang.Object

org.wso2.siddhi.core.query.selector.attribute.aggregator.incremental.IncrementalDataAggregator

public class IncrementalDataAggregator
extends Object

This class implements the logic to aggregate data that is in-memory or in tables, in incremental data processing. In-memory data is required to be aggregated when retrieving values from an aggregate. Table data (tables used to persist incremental aggregates) needs to be aggregated when querying aggregate data from a different server (apart from the server, which was used to define the aggregation).

Constructor Summary

Constructors

Constructor and Description
IncrementalDataAggregator(List<org.wso2.siddhi.query.api.aggregation.TimePeriod.Duration> incrementalDurations, org.wso2.siddhi.query.api.aggregation.TimePeriod.Duration aggregateForDuration, List<ExpressionExecutor> baseExecutors, ExpressionExecutor timestampExecutor, MetaStreamEvent metaStreamEvent)

Method Summary

Modifier and Type	Method and Description
ComplexEventChunk<StreamEvent>	aggregateInMemoryData(Map<org.wso2.siddhi.query.api.aggregation.TimePeriod.Duration,IncrementalExecutor> incrementalExecutorMap)
ComplexEventChunk<StreamEvent>	aggregateTableData(Map<org.wso2.siddhi.query.api.aggregation.TimePeriod.Duration,Table> aggregationTables, GroupByKeyGenerator groupByKeyGenerator)

Methods inherited from class java.lang.Object

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

Constructor Detail

IncrementalDataAggregator

public IncrementalDataAggregator(List<org.wso2.siddhi.query.api.aggregation.TimePeriod.Duration> incrementalDurations,
                                 org.wso2.siddhi.query.api.aggregation.TimePeriod.Duration aggregateForDuration,
                                 List<ExpressionExecutor> baseExecutors,
                                 ExpressionExecutor timestampExecutor,
                                 MetaStreamEvent metaStreamEvent)

Method Detail

aggregateInMemoryData

public ComplexEventChunk<StreamEvent> aggregateInMemoryData(Map<org.wso2.siddhi.query.api.aggregation.TimePeriod.Duration,IncrementalExecutor> incrementalExecutorMap)

aggregateTableData

public ComplexEventChunk<StreamEvent> aggregateTableData(Map<org.wso2.siddhi.query.api.aggregation.TimePeriod.Duration,Table> aggregationTables,
                                                         GroupByKeyGenerator groupByKeyGenerator)