In Memory JCR

The goal of this project is to make it easier for developers to set up a full feature JCR repository (In this case Jackrabbit) for testing purposes.

Usage

The first is to add this library to your project as a test dependency. If you are using Maven you can do so by adding the following snippet to your pom.xml file

<dependencies>
  ...
  <dependency>
    <groupId>nl.openweb.jcr</groupId>
    <artifactId>in-memory-jcr</artifactId>
    <version>1.3.2</version>
    <scope>test</scope>
  </dependency>
  ...
</dependencies>

then in your test you can instantiate a new repository simple by instantiating a new instance of InMemoryJcrRepository class.

InMemoryJcrRepository repository = new InMemoryJcrRepository();

to obtain an instance of java session via

Session session = repository.login(new SimpleCredentials("admin", "admin".toCharArray()));

Please notice that you need to shutdown the repository at the end of your test. Because unlike what the name of this library might suggest the repository is not 100% in the memory. The database and the indexes are indeed kept in memory, but it still places a couple of XML files in a temporary folder. So shutting down the repository insures that these xml files are deleted. To shutdown the repository you can use the following snippet

repository.shutdown();

Please notice that InMemoryJcrRepository implements AutoCloseable. Therefore it can be in a try with resources statement as well.

try (InMemoryJcrRepository repository = new InMemoryJcrRepository()) {
	Session session = repository.login(new SimpleCredentials("admin", "admin".toCharArray()));
	// here is your test
}

Extra tools

Node definition constrains and namespace definitions can be a headache during testing. To make testing easier, there is a utility class that you can use to register your node types and mixin types free of constrains. Let say I want to have a node of type "mynamespace:mynode" then I can simple use

NodeTypeDefUtils.createNodeType(session, "mynamespace:mynode");

Please notice that you do not need to register "mynamespace". If "mynamespace" namespace is not register the NodeTypeDefUtils is going to register it automatically.

Here is a complete example

try (InMemoryJcrRepository repository = new InMemoryJcrRepository()) {
    Session session = repository.login(new SimpleCredentials("admin", "admin".toCharArray()));
    NodeTypeDefUtils.createNodeType(session, "mynamespace:mynode");

    Node node = session.getRootNode().addNode("nodeName", "mynamespace:mynode");
    session.save();
    // your test
}