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

Class EmptyObserver

java.lang.Object

org.apache.jackrabbit.oak.spi.commit.EmptyObserver

All Implemented Interfaces:

Observer

public class EmptyObserver
extends Object
implements Observer

Basic content change observer that doesn't do anything. Useful as a "null object" for cases where another observer has not been configured, thus avoiding an extra null check when invoking the observer.

Field Summary

Fields

Modifier and Type	Field	Description
static final EmptyObserver	INSTANCE	Static instance of this class, useful as a "null object".

Constructor Summary

Constructors

Constructor	Description
EmptyObserver()

Method Summary

Modifier and Type	Method	Description
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

Field Details

INSTANCE

public static final EmptyObserver INSTANCE

Static instance of this class, useful as a "null object".

Constructor Details

EmptyObserver

public EmptyObserver()

Method Details

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