psdi.app.eventresponse

Class RespondingEventListener

java.lang.Object

psdi.app.eventresponse.RespondingEventListener

All Implemented Interfaces:

EventListener

public class RespondingEventListener
extends java.lang.Object
implements EventListener

This object is created to respond to all events and redirect those to the members of the ER set that match the source and event name. It also supports matching immediate changes, before ER Mbos are saved to the database.

Author:

neville

Method Summary

Modifier and Type	Method and Description
void	eventAction(EventMessage em) Searches for responders to the EventAction of the event.
boolean	eventValidate(EventMessage em) Method to respond to the eventValidate action.
static RespondingEventListener	getListener() Returns the listener object.
static MXLogger	getLogger() Returns the logger object.
void	postCommitEventAction(EventMessage em) Searches for responders to the post-commit of the event.
void	preSaveEventAction(EventMessage em) Searches for responders to the PreSave part of the event.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getListener

public static RespondingEventListener getListener()
                                           throws java.rmi.RemoteException,
                                                  MXException

Returns the listener object. Creates one if not in existance yet.

Returns:

the listener

Throws:

java.rmi.RemoteException

MXException

getLogger

public static MXLogger getLogger()

Returns the logger object. Creates one if not in existence yet.

Returns:

the MXLogger

eventValidate

public boolean eventValidate(EventMessage em)
                      throws MXException

Method to respond to the eventValidate action.

Specified by:

eventValidate in interface EventListener

Returns:

If no ERs match the source & event name, false is returned and the MXServer won't inform the listener of preSave, event, and postCommit actions. If there are ERs, even if they don't have actions for eventValidate, then true is returned.

Throws:

MXException - The first EventResponse, whose validate action throws an exception, halts the validation process and that exception is passed up to the source. This will prevent the event from continuing. In this way ER's can be used to prevent status changes or such.

preSaveEventAction

public void preSaveEventAction(EventMessage em)
                        throws MXException

Searches for responders to the PreSave part of the event. Exceptions thrown are written to the error log, but do not prevent all responders from getting a chance at the event.

Specified by:

preSaveEventAction in interface EventListener

Parameters:

em - The event to respond to.

Throws:

MXException

eventAction

public void eventAction(EventMessage em)
                 throws MXException

Searches for responders to the EventAction of the event. Exceptions thrown are written to the error log, but do not prevent all responders from getting a chance at the event.

Specified by:

eventAction in interface EventListener

Parameters:

em - The event to respond to.

Throws:

MXException

postCommitEventAction

public void postCommitEventAction(EventMessage em)
                           throws MXException

Searches for responders to the post-commit of the event. Exceptions thrown are written to the error log, but do not prevent all responders from getting a chance at the event.

Specified by:

postCommitEventAction in interface EventListener

Parameters:

em - The event to respond to.

Throws:

MXException