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

Interface FindableProcessor

All Known Implementing Classes:

AbstractRecordTable, AggregateWindowProcessor, ExternalTimeBatchWindowProcessor, ExternalTimeWindowProcessor, FrequentWindowProcessor, InMemoryTable, LengthBatchWindowProcessor, LengthWindowProcessor, LossyFrequentWindowProcessor, SortWindowProcessor, Table, TableWindowProcessor, TimeBatchWindowProcessor, TimeLengthWindowProcessor, TimeWindowProcessor, Window, WindowWindowProcessor

public interface FindableProcessor

Interface for all processors which holds a collection of events and supports traversing and finding events from that collection. find() will be used by Pattern and Join Processors to get matching event.

Method Summary

Modifier and Type	Method and Description
CompiledCondition	compileCondition(org.wso2.siddhi.query.api.expression.Expression condition, MatchingMetaInfoHolder matchingMetaInfoHolder, SiddhiAppContext siddhiAppContext, List<VariableExpressionExecutor> variableExpressionExecutors, Map<String,Table> tableMap, String queryName) 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, CompiledCondition compiledCondition) To find events from the processor event pool, that the matches the matchingEvent based on finder logic.

Method Detail

find

StreamEvent find(StateEvent matchingEvent,
                 CompiledCondition compiledCondition)

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

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

Returns:

the matched events

compileCondition

CompiledCondition compileCondition(org.wso2.siddhi.query.api.expression.Expression condition,
                                   MatchingMetaInfoHolder matchingMetaInfoHolder,
                                   SiddhiAppContext siddhiAppContext,
                                   List<VariableExpressionExecutor> variableExpressionExecutors,
                                   Map<String,Table> tableMap,
                                   String queryName)

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:

condition - the matching condition

matchingMetaInfoHolder - the meta structure of the incoming matchingEvent

siddhiAppContext - current siddhi app context

variableExpressionExecutors - the list of variable ExpressionExecutors already created

tableMap - map of event tables

queryName - query name of findable processor belongs to.

Returns:

compiled Condition having the capability of matching events against the incoming matchingEvent