org.wso2.siddhi.core.query.processor.stream.window

Interface FindableProcessor

All Known Subinterfaces:

EventTable

All Known Implementing Classes:

EventWindow, ExternalTimeBatchWindowProcessor, ExternalTimeWindowProcessor, FirstUniqueWindowProcessor, FrequentWindowProcessor, InMemoryEventTable, LengthBatchWindowProcessor, LengthWindowProcessor, LossyFrequentWindowProcessor, SortWindowProcessor, TableWindowProcessor, TimeBatchWindowProcessor, TimeLengthWindowProcessor, TimeWindowProcessor, UniqueExternalTimeBatchWindowProcessor, UniqueWindowProcessor, WindowWindowProcessor

public interface FindableProcessor

Created on 12/8/14.

Method Summary

Modifier and Type	Method and Description
Finder	constructFinder(org.wso2.siddhi.query.api.expression.Expression expression, MatchingMetaStateHolder matchingMetaStateHolder, ExecutionPlanContext executionPlanContext, List<VariableExpressionExecutor> variableExpressionExecutors, Map<String,EventTable> eventTableMap) To construct a finder having the capability of finding events at the processor that corresponds to the incoming matchingEvent and the given matching expression logic.
StreamEvent	find(StateEvent matchingEvent, Finder finder) To find events from the processor event pool, that the matches the matchingEvent based on finder logic.

Method Detail

find

StreamEvent find(StateEvent matchingEvent,
                 Finder finder)

To find events from the processor event pool, that the matches the matchingEvent based on finder logic.

Parameters:

matchingEvent - the event to be matched with the events at the processor

finder - the execution element responsible for finding the corresponding events that matches the matchingEvent based on pool of events at Processor

Returns:

the matched events

constructFinder

Finder constructFinder(org.wso2.siddhi.query.api.expression.Expression expression,
                       MatchingMetaStateHolder matchingMetaStateHolder,
                       ExecutionPlanContext executionPlanContext,
                       List<VariableExpressionExecutor> variableExpressionExecutors,
                       Map<String,EventTable> eventTableMap)

To construct a finder having the capability of finding events at the processor that corresponds to the incoming matchingEvent and the given matching expression logic.

Parameters:

expression - the matching expression

matchingMetaStateHolder - the meta structure of the incoming matchingEvent

executionPlanContext - current execution plan context

variableExpressionExecutors - the list of variable ExpressionExecutors already created

eventTableMap - map of event tables

Returns:

finder having the capability of finding events at the processor against the expression and incoming matchingEvent