I have done some samples on Jackrabbit.... I found this particular of code in my old works. it works. I can send you whole of the samples if you need... I have followed a tutorial to find this.

package toorin.jcr.repo;
import javax.jcr.Repository;
import javax.jcr.Session;
import javax.jcr.SimpleCredentials;
import javax.jcr.Node;
import javax.naming.Context;
import javax.naming.InitialContext;
import org.apache.jackrabbit.core.jndi.RegistryHelper;
import org.apache.jackrabbit.value.StringValue;
import org.apache.jackrabbit.value.DateValue;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.util.Hashtable;
import java.util.Calendar;

public class RepoClientJNDI  {
    protected  Log logger = LogFactory.getLog(getClass());
    public  String connect() throws Exception {
        logger.info(" .'.'.'.'.'.'.'.'. Start .'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.' ");
        StringBuffer  result  =  new StringBuffer();
        String configFile = "toorin_repository/repository.xml";
        String repHomeDir = "toorin_repository";

        Hashtable env = new Hashtable();
        // JNDI Directory service...

        env.put(Context.INITIAL_CONTEXT_FACTORY , "org.apache.jackrabbit.core.jndi.provider.DummyInitialContextFactory");
        env.put(Context.PROVIDER_URL,"localhost");
        InitialContext ctx = new InitialContext(env);
        RegistryHelper.registerRepository(ctx,"toorin_repo" , configFile , repHomeDir , true);
        Repository r = (Repository)ctx.lookup("toorin_repo");
        Session session = r.login(new SimpleCredentials("username", "password".toCharArray()),null);

        try {
            /*
               Root
                 \
                  \
                  hello
                    \
                     \
                    world --+ message : hello, world!
                            |
                            + prop1 : it is a content.
            */
            Node root = session.getRootNode();
            Node n = root.addNode("blog");    // root node is here
            n.setProperty("blogtitle", new StringValue("Chasing Jackrabbit article"));
            n.setProperty("blogauthor", new StringValue("Joe Blogger"));
            n.setProperty("blogdate", new DateValue(Calendar.getInstance()));
            n.setProperty("blogtext", new StringValue("JCR is an interesting API to lo learn."));
            /*
            We can subsequently look up the nodes in the repository via any of
            the query mechanisms supported by a repository. JCR compliant repositories
            must support at least XPATH, but Jackrabbit also supports SQL. The following
            code snippet finds and lists all blog entries written by "Joe Blogger:"
            */
            session.save();
            Node node = root.getNode("blog/");
            result.append(node.getPath());
            result.append(node.getProperty("message").getString());
            result.append(node.getProperty("prop1").getString());
            result.append(node.getProperty("prop2").getString());
            root.getNode("hello").remove();
            result.append("hello node ");
            session.save();
        } finally {
            session.logout();
            logger.info(" .'.'.'.'.'.'.'.'. End .'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.' ");
        }
        return result.toString();
    }
}