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.