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

boolean	cacheEnabled()
ExpressionResultCacheEntry<EventBean[],java.lang.Object>	getDeclaredExpressionLastValue(java.lang.Object node, EventBean[] eventsPerStream)
void	saveDeclaredExpressionLastValue(java.lang.Object node, EventBean[] eventsPerStream, java.lang.Object result)

Method Detail

cacheEnabled

boolean cacheEnabled()

getDeclaredExpressionLastValue

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

saveDeclaredExpressionLastValue

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