com.espertech.esper.core.service

Interface ExpressionResultCacheForDeclaredExprLastValue

All Known Implementing Classes:

ExpressionResultCacheForDeclaredExprLastValueMulti, ExpressionResultCacheForDeclaredExprLastValueNone, ExpressionResultCacheForDeclaredExprLastValueSingle

public interface ExpressionResultCacheForDeclaredExprLastValue

On the level of expression declaration: a) for non-enum evaluation and for enum-evaluation a separate cache b) The cache is keyed by the prototype-node and verified by a events-per-stream (EventBean[]) that is maintained or rewritten.

NOTE: ExpressionResultCacheEntry should not be held onto since the instance returned can be reused.

Method Summary

Modifier and Type	Method and Description
boolean	cacheEnabled()
ExpressionResultCacheEntry<EventBean[],Object>	getDeclaredExpressionLastValue(Object node, EventBean[] eventsPerStream)
void	saveDeclaredExpressionLastValue(Object node, EventBean[] eventsPerStream, Object result)

Method Detail

cacheEnabled

boolean cacheEnabled()

getDeclaredExpressionLastValue

ExpressionResultCacheEntry<EventBean[],Object> getDeclaredExpressionLastValue(Object node,
                                                                              EventBean[] eventsPerStream)

saveDeclaredExpressionLastValue

void saveDeclaredExpressionLastValue(Object node,
                                     EventBean[] eventsPerStream,
                                     Object result)