NotificationsHandler (bw-util-jms 4.0.29 API)

java.lang.Object
- org.bedework.util.jms.NotificationsHandler

Direct Known Subclasses:

JmsNotificationsHandlerImpl
```
public abstract class NotificationsHandler
extends Object
```
Handler which may be called to notify the system that something changed.
Some implementations may be able to call immediately changes take effect, for example the bedework hibernate implementation can call at the point a calendar is changed. Others may have to poll to determine if something has changed.

Author:

Mike Douglass

Constructor Summary

Constructors
Constructor Description

NotificationsHandler()

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`abstract void`	`post(SysEvent ev)`	Called to notify container that an event occurred.
`abstract void`	`registerListener(SysEventListener l, boolean persistent)`	Register a listener.
`abstract void`	`removeListener(SysEventListener l)`	Remove a listener.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - NotificationsHandler
```
public NotificationsHandler()
```
- Method Detail
  - post
```
public abstract void post(SysEvent ev)
                   throws NotificationException
```
    Called to notify container that an event occurred.
    
    Parameters:
    
    ev - the event
    
    Throws:
    
    NotificationException - on fatal error
  - registerListener
```
public abstract void registerListener(SysEventListener l,
                                      boolean persistent)
                               throws NotificationException
```
    Register a listener.
    
    Parameters:
    
    l - the listener
    
    persistent - true if this listener is to be stored in the database and reregistered at each system startup.
    
    Throws:
    
    NotificationException - on fatal error
  - removeListener
```
public abstract void removeListener(SysEventListener l)
                             throws NotificationException
```
    Remove a listener. If persistent it will be deleted from the database.
    
    Parameters:
    
    l - the listener
    
    Throws:
    
    NotificationException - on fatal error