ChangeDispatcher (The Adobe AEM Quickstart and Web Application. 6.6.0)

java.lang.Object
- org.apache.jackrabbit.oak.spi.commit.ChangeDispatcher

All Implemented Interfaces:

Observable, Observer
```
public class ChangeDispatcher
extends java.lang.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

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`@NotNull java.io.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 java.io.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