Package org.marketcetera.modules.cep.esper

Interface CEPEsperProcessor.ProcessingDelegate

All Known Implementing Classes:

CEPEsperProcessor.ExternalTimeDelegate, CEPEsperProcessor.RegularDelegate

Enclosing class:

CEPEsperProcessor

private static interface CEPEsperProcessor.ProcessingDelegate

Basic interface to describe a data flow processing delegate. This is going to be used by both the "straight-through to Esper" delegate and by the {#link ExternalTimeDelegate} that will behave differently in when external time is being used.

Method Summary

Modifier and Type	Method	Description
void	cancelRequest(DataFlowID inFlowID, RequestID inRequestID)	Cancels all existing and pending requests.
void	preProcessData(DataFlowID inFlowID, Object inData)	Invoked to allow every delegate to pre-process data before it is delivered to the esper runtime.
void	processRequest(String[] inStmts, DataEmitterSupport inSupport)	Sends the request to be processed.

Method Detail

processRequest

void processRequest(String[] inStmts,
                    DataEmitterSupport inSupport)
             throws RequestDataException

Sends the request to be processed.

Parameters:

inStmts - the query statements.

inSupport - the emitter support to emit data.

Throws:

RequestDataException - if there were errors processing the request.

cancelRequest

void cancelRequest(DataFlowID inFlowID,
                   RequestID inRequestID)

Cancels all existing and pending requests.

Parameters:

inFlowID - the flowID of the data flow to cancel.

inRequestID - the requestID of the data flow to cancel.

preProcessData

void preProcessData(DataFlowID inFlowID,
                    Object inData)
             throws StopDataFlowException

Invoked to allow every delegate to pre-process data before it is delivered to the esper runtime.

Parameters:

inFlowID - the data flowID.

inData - the received data.

Throws:

StopDataFlowException - if the data flow should be stopped.