org.sakaiproject.util
Class EventObservingCourier

java.lang.Object
  org.sakaiproject.util.ObservingCourier
      org.sakaiproject.util.EventObservingCourier

All Implemented Interfaces:

EventListener, Observer, ObservingCourier, org.sakaiproject.tool.api.SessionBindingListener

public class EventObservingCourier
extends ObservingCourier
implements org.sakaiproject.tool.api.SessionBindingListener

EventObservingCourier is an ObservingCourier that watches Events, of a particular reference root. It automatically registers / un-registers as an observer with the event service.

Field Summary

protected org.sakaiproject.event.api.EventTrackingService	m_eventTrackingService Constructor discovered injected EventTrackingService.
protected String	m_resourcePattern The event resource pattern - we watch for only events that start with this

Fields inherited from class org.sakaiproject.util.ObservingCourier

m_courierService, m_deliveryId, m_elementId, m_enabled, m_location

Constructor Summary

EventObservingCourier(String location, String elementId, String resourcePattern)
Construct.

Method Summary

boolean	check(Object arg) Check to see if we want to process or ignore this update.
String	getResourcePattern()
void	setResourcePattern(String pattern)
void	valueBound(org.sakaiproject.tool.api.SessionBindingEvent event) SessionBindingListener implementation
void	valueUnbound(org.sakaiproject.tool.api.SessionBindingEvent event)

Methods inherited from class org.sakaiproject.util.ObservingCourier

disable, enable, getDeliveryId, getElementId, getEnabled, getLocation, justDelivered, setDeliveryId, setElementId, update

Methods inherited from class java.lang.Object

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

Field Detail

m_eventTrackingService

protected org.sakaiproject.event.api.EventTrackingService m_eventTrackingService

Constructor discovered injected EventTrackingService.

m_resourcePattern

protected String m_resourcePattern

The event resource pattern - we watch for only events that start with this

Constructor Detail

EventObservingCourier

public EventObservingCourier(String location,
                             String elementId,
                             String resourcePattern)

Construct.

Parameters:

location - The key identifying the Portal Page Instance.

elementId - The key identifying the element on the Portal Page that would need a courier delivered message when things change.

The - event resource pattern - we watch for only events whose ref start with this.

Method Detail

getResourcePattern

public String getResourcePattern()

setResourcePattern

public void setResourcePattern(String pattern)

check

public boolean check(Object arg)

Check to see if we want to process or ignore this update.

Specified by:

check in interface ObservingCourier

Overrides:

check in class ObservingCourier

Parameters:

arg - The arg from the update.

Returns:

true to continue, false to quit.

valueBound

public void valueBound(org.sakaiproject.tool.api.SessionBindingEvent event)

SessionBindingListener implementation

Specified by:

valueBound in interface org.sakaiproject.tool.api.SessionBindingListener

valueUnbound

public void valueUnbound(org.sakaiproject.tool.api.SessionBindingEvent event)

Specified by:

valueUnbound in interface org.sakaiproject.tool.api.SessionBindingListener