org.apache.river.outrigger

Class AvailabilityRegistrationWatcher.VisibilityEventSender

java.lang.Object

org.apache.river.outrigger.AvailabilityRegistrationWatcher.VisibilityEventSender

All Implemented Interfaces:

EventSender

Enclosing class:

AvailabilityRegistrationWatcher

private class AvailabilityRegistrationWatcher.VisibilityEventSender
extends Object
implements EventSender

Common implementation of EventSender for visibility events

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	isVisible true if this is a visibility event
private long	ourSeqNumber the sequence number this event should have
private EntryRep	rep the EntryRep for the entry that became visible

Constructor Summary

Constructors

Modifier	Constructor and Description
private	VisibilityEventSender(EntryRep rep, boolean isVisible, long ourSeqNumber) Create a new VisibilityEventSender that will send a new OutriggerAvailabilityEvent.

Method Summary

Modifier and Type	Method and Description
void	cancelRegistration() Called when the event sending infrastructure decides to give up on the event registration associated with this sender.
void	sendEvent(JavaSpace source, long now, ProxyPreparer preparer) Send a remote event to the encapsulated listener of the encapsulated type, with the encapsulated handback, sequence number.

Methods inherited from class java.lang.Object

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

Field Detail

rep

private final EntryRep rep

the EntryRep for the entry that became visible

ourSeqNumber

private final long ourSeqNumber

the sequence number this event should have

isVisible

private final boolean isVisible

true if this is a visibility event

Constructor Detail

VisibilityEventSender

private VisibilityEventSender(EntryRep rep,
                              boolean isVisible,
                              long ourSeqNumber)

Create a new VisibilityEventSender that will send a new OutriggerAvailabilityEvent.

Parameters:

rep - the EntryRep for the entry that became visible/available

isVisible - true if this is a visibility event

ourSeqNumber - the sequence number this event should have

Method Detail

sendEvent

public void sendEvent(JavaSpace source,
                      long now,
                      ProxyPreparer preparer)
               throws UnknownEventException,
                      IOException,
                      ClassNotFoundException

Description copied from interface: EventSender

Send a remote event to the encapsulated listener of the encapsulated type, with the encapsulated handback, sequence number. No locks should be held while calling the listener. This method may be called more than once if all previous tries failed. This call may do nothing and return normally if it is determined that delivering the event is no longer useful. It is assumed that once this method returns normally it will not be called again.

Specified by:

sendEvent in interface EventSender

Parameters:

source - the source the event object sent to the lister should have.

now - The current time.

preparer - to apply to the listener if it has been recovered from a store and not yet re-prepared in this VM.

Throws:

UnknownEventException - if the call to the listener does. Note, this will not cause the watcher to remove itself.

IOException - if the listener can not be unmarshalled. May throw RemoteException if the call to the listener or preparer does

ClassNotFoundException - if the listener needs to be unmarshalled and a necessary class can not be found.

cancelRegistration

public void cancelRegistration()

Description copied from interface: EventSender

Called when the event sending infrastructure decides to give up on the event registration associated with this sender.

Specified by:

cancelRegistration in interface EventSender