/**
* Copyright (c) 2013, Institute of Information Systems (Sven Groppe and contributors of LUPOSDATE), University of Luebeck
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice, this list of conditions and the following
* disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other materials provided with the distribution.
* - Neither the name of the University of Luebeck nor the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package lupos.event.producer;
import java.util.ArrayList;
import java.util.List;
import lupos.datastructures.items.Triple;
import lupos.datastructures.items.literal.*;
import lupos.event.communication.*;
import lupos.event.util.Literals;
/**
* Creates an event without additional properties every second.
*/
public class EmptyProducer extends ProducerBase {
public static final String NAMESPACE = "http://localhost/events/Empty/";
private static final int INTERVAL = 1000;
private static final Literal TYPE = Literals.createURI(EmptyProducer.NAMESPACE, "EmptyEvent");
public EmptyProducer(SerializingMessageService msgService) {
super(msgService, INTERVAL);
}
@Override
public List<List<Triple>> produce() {
List<Triple> triples = new ArrayList<Triple>();
triples.add(new Triple(Literals.AnonymousLiteral.ANONYMOUS, Literals.RDF.TYPE, EmptyProducer.TYPE));
return ProducerBase.fold(triples);
}
public static void main(String[] args) throws Exception {
// create communication channel
SerializingMessageService msgService = ProducerBase.connectToMaster();
// start producer
new EmptyProducer(msgService).start();
}
}