How I can realize a SPARQL Endpoint public if I use only Web Service

Question

I have a question:

I have read on the Web that SPARQL endpoint is a Web service that answers SPARQL queries for some dataset.

I have read also that I can realize a Web Service which has a method that queries the data on triple store and so I have a SPARQL endpoint. It's right?

I'm using a Jena TDB Triple Store and my question is:

How I can realize a SPARQL Endpoint public (like dbpedia.org/sparql) if I use only Web Service?

I'm using Netbeans with Glassfish4.0 and this is my code:

@WebService(serviceName = "query_ws")
@Stateless()
public class query_ws {

    String directory = "C:\\jena\\tdb";

    @WebMethod(operationName = "query")
    public String query(@WebParam(name = "strquery") String strquery){

        String results = queryTDB(strquery, directory);
        return results;
    }

public String queryTDB(String queryStr, String directory) {

        Dataset dataset = TDBFactory.createDataset(directory);

        Query query = QueryFactory.create(queryStr);
        QueryExecution qexec = QueryExecutionFactory.create(query, dataset);
        qexec.getContext().set(TDB.symUnionDefaultGraph, true);
        ResultSet results = qexec.execSelect();
        String strings = ResultSetFormatter.asText(results);
        qexec.close();
        return strings;
    }

Answer 1

Apache Jena Fuseki is the Jena project's SPARQL server.

You can use that as a standalone server, or you can use it as a library of servlets, or you can extract the code you want from the source.