com.neurosys.etl.process

Interface ListeningProcess<PROCESS>

All Known Implementing Classes:

OrderItemProductChangeListener

public interface ListeningProcess<PROCESS>

A process that listens to other Processes

Author:

Arjun Dhar

Method Summary

Modifier and Type	Method and Description
void	onChange(ProcessState ps, Process.Event event, Process.EventPoint ep) If this Process has registered with another Process, then this serves as a CallBack; where the calling process will pass the event details and itself to this method, so on the given change event the current process may now how to react.

Method Detail

onChange

void onChange(ProcessState ps,
              Process.Event event,
              Process.EventPoint ep)

If this Process has registered with another Process, then this serves as a CallBack; where the calling process will pass the event details and itself to this method, so on the given change event the current process may now how to react.

In a Asynchronous / Concurrent scenario, the ProcessState maybe modified. It may be wise to copy/clone it before processing it. The calling code makes no guarantee of reliability of the state of the object. Example: A batch is being processed, if the batch is a Collection it could be cleared by the code @ any point.
The code firing the event will always call this synchronously, so it is upto the listening Process to to do this synchronously or asynchronously.

Parameters:

ps - as ProcessState

event - as Process.Event

ep - as Process.EventPoint