org.apache.jackrabbit.oak.spi.commit

Class DiffObserver

java.lang.Object

org.apache.jackrabbit.oak.spi.commit.DiffObserver

All Implemented Interfaces:

Observer

public abstract class DiffObserver
extends Object
implements Observer

Abstract base class for observers that use a content diff to determine what changed between two consecutive observed states of the repository. Subclasses just need to provide the diff handler by implementing the getRootDiff(NodeState, NodeState, CommitInfo) method.

Constructor Summary

Constructors

Constructor and Description
DiffObserver()

Method Summary

Modifier and Type	Method and Description
void	contentChanged(NodeState root, CommitInfo info) Observes a content change.
protected abstract NodeStateDiff	getRootDiff(NodeState before, NodeState after, CommitInfo info) Returns the diff handler to be used for the given content change.

Methods inherited from class java.lang.Object

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

Constructor Detail

DiffObserver

public DiffObserver()

Method Detail

getRootDiff

protected abstract NodeStateDiff getRootDiff(@Nonnull
                                             NodeState before,
                                             @Nonnull
                                             NodeState after,
                                             @Nonnull
                                             CommitInfo info)

Returns the diff handler to be used for the given content change.

Parameters:

before - state of the repository before this changes

after - state of the repository after this changes

info - local commit information, or null if not available

Returns:

diff handler for this change

contentChanged

public final void contentChanged(@Nonnull
                                 NodeState root,
                                 @Nonnull
                                 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