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Apache Jackrabbit Oak repository upgrade

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Table of contents

Introduction

Apache Jackrabbit Oak is an implementation of JCR 2.0 specification. https://jackrabbit.apache.org/oak/

This project provides an example of Jackrabbit Oak repository upgrade.

Read the full documentation of the project.

The project consists of two application versions.

The first application repository configuration file is "repository-first-version/src/main.resources/cnd.config".

The second application repository configuration file is "repository-second-version/src/main.resources/cnd.config".

The following are the main assumptions:

  • The repository is an Oak Segment Tar (Tar file based Segment NodeStore)
  • The repository contains custom node types
  • The applications use the same Jackrabbit Oak version

The upgrade from the first repository to the second repository consists of:

  • Remove the mixin "app:attributes" that contains the property "app:hidden"
  • Add a new property "app:system" into an existent mixin "app:properties"
  • Remove the property "app:deletable" from the mixin "app:properties"
  • Add a new mixin "app:describable" with a property "app:description"

The repositories contain a versionable node "app:file" with a version-related mixin "app:versionInfo".

The upgrade procedure updates the node and node history properties definition.

Build project

mvn clean install

First Application

First Application Configuration

Configure the absolute path where to store the Jackrabbit Oak repository. Use the configuration file located in "Jackrabbit-Oak-repository-upgrade/app-run-first-version/src/main/resources/settings.properties"

Run the first version application

cd app-run-first-version/target
java -jar app-run-first-version-1.0-SNAPSHOT.jar

Repository upgrade

cd repository-upgrade-second-version/target
java -jar repository-upgrade-second-version-1.0-SNAPSHOT.jar

Second Application

Second Application Configuration

Configure the absolute path where to store the Jackrabbit Oak repository. Use the configuration file located in "Jackrabbit-Oak-repository-upgrade/app-run-second-version/src/main/resources/settings.properties"

Run the second version application

cd app-run-second-version/target
java -jar app-run-second-version-1.0-SNAPSHOT.jar

Check repository content

Download oak-run-1.6.22.jar from https://search.maven.org/artifact/org.apache.jackrabbit/oak-run/1.6.22/jar

java -jar oak-run-1.6.22.jar explore /path/to/oak-repository/repository

Custom node type registration

The custom node types can be registered into the content repository with a "Compact Namespace and Node Type Definition" file. See http://jackrabbit.apache.org/jcr/node-types.html