Package org.apache.jackrabbit.oak.spi.commit

Class ChangeDispatcher

java.lang.Object

org.apache.jackrabbit.oak.spi.commit.ChangeDispatcher

All Implemented Interfaces:

Observable, Observer

public class ChangeDispatcher
extends Object
implements Observable, Observer

A ChangeDispatcher instance dispatches content changes to registered Observers.

Changes are reported by calling contentChanged(NodeState, CommitInfo).

The addObserver(Observer) method registers an Observer for receiving notifications for all changes reported to this instance.

Constructor Summary

Constructors

Constructor	Description
ChangeDispatcher(@NotNull NodeState root)	Create a new instance for dispatching content changes

Method Summary

Modifier and Type	Method	Description
@NotNull Closeable	addObserver(Observer observer)	Register a new Observer for receiving notifications about changes reported to this change dispatcher.
void	contentChanged(@NotNull NodeState root, @NotNull CommitInfo info)	Observes a content change.

Methods inherited from class java.lang.Object

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

Constructor Detail

ChangeDispatcher

public ChangeDispatcher(@NotNull
                        @NotNull NodeState root)

Create a new instance for dispatching content changes

Parameters:

root - current root node state

Method Detail

addObserver

@NotNull
public @NotNull Closeable addObserver(Observer observer)

Register a new Observer for receiving notifications about changes reported to this change dispatcher. Changes are reported synchronously and clients need to ensure to no block any length of time (e.g. by relaying through a BackgroundObserver).

Clients need to call Closeable.close() close} on the returned Closeable instance to stop receiving notifications.

Specified by:

addObserver in interface Observable

Returns:

a Closeable instance

contentChanged

public void contentChanged(@NotNull
                           @NotNull NodeState root,
                           @NotNull
                           @NotNull CommitInfo info)

Description copied from interface: Observer

Observes a content change. See the Observer class javadocs and relevant repository and observer registration details for more information on when and how this method gets called.

Specified by:

contentChanged in interface Observer

Parameters:

root - root state of the repository

info - commit information