How to run a Java Sesame Application From Eclipse

Question

I am very new to Java Sesame. I am trying to start with something very simple. Here are the steps I have done so far:

1- Deployed the war files: openrdf-sesame and openrdf-workbench in Tomcat Manager. 2- created a repository called Sample through openrdf-workbench 3- In Eclipse, I have got this code:

import org.openrdf.repository.Repository;
import org.openrdf.repository.RepositoryConnection;
import org.openrdf.repository.RepositoryException;
import org.openrdf.repository.config.RepositoryConfigException;
import org.openrdf.repository.manager.RemoteRepositoryManager;
import java.io.File;
import org.openrdf.rio.RDFFormat;
import java.net.URL;
import org.openrdf.OpenRDFException;
import java.io.IOException;

public class RDF{

public void create() throws RepositoryConfigException, RepositoryException
{


    String serverUrl = "http://localhost:8080/openrdf-sesame";
    RemoteRepositoryManager manager = new RemoteRepositoryManager(serverUrl);
    manager.initialize();
    Repository repository = manager.getRepository("Sample");
    File file = new File("Sample_Sesame.json");
    String baseURI = "file://Sample_Sesame.json";


    try {
       RepositoryConnection con = repository.getConnection();
       try {
          con.add(file, baseURI, RDFFormat.N3);
          URL url = new URL("/Users/Documents/newsample/folder/Sample_Sesame.json");
          con.add(url, url.toString(), RDFFormat.RDFXML);
           }
       finally { con.close(); }
      }
    catch (OpenRDFException e) { // handle exception }
    catch (IOException e) { // handle io exception }
}
}

As being a beginner in Java Sesame, I have two questions, since I created the repository in openrdf-workbench, how can I execute the above code in Eclipse?

My second question: is this the right way of adding an RDF statement into the repository? The file I am having is a JSON file as below: Sample_Sesame.json

{
 "http://example.org/about" : 
{
   "http://purl.org/dc/elements/1.1/title": [ { "type" : "literal" , "value" : "Rich's Homepage" } ]
}
}

Your assistance would be sincerely more than appreciated.

Answer 1

To execute your code, you simply create a main method:

public static void main(String[] args) {
    RDF rdf = new RDF();
    rdf.create();
}

Your RDF seems to be in the RDF/JSON format which seems to be supported by Sesame 2.7, so you have to specify the RDFFormat.RDFJSON.

Alternatively, you could convert your file to some other, universally accepted format such as N-Triples. Have a look at http://rdf-translator.appspot.com/ and try to copy paste your sample json there. For input select RDF/JSON and for output N-Triples.