jena-arq/src-examples/arq/examples/ExampleDBpedia1.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package arq.examples;

import org.apache.jena.query.* ;
import org.apache.jena.sparql.engine.http.QueryEngineHTTP ;

public class ExampleDBpedia1
{
    static public void main(String...argv)
    {
        String queryStr = "select distinct ?Concept where {[] a ?Concept} LIMIT 10";
        Query query = QueryFactory.create(queryStr);

        // Remote execution.
        try ( QueryExecution qexec = QueryExecutionFactory.sparqlService("http://dbpedia.org/sparql", query) ) {
            // Set the DBpedia specific timeout.
            ((QueryEngineHTTP)qexec).addParam("timeout", "10000") ;

            // Execute.
            ResultSet rs = qexec.execSelect();
            ResultSetFormatter.out(System.out, rs, query);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}