maven-archetypes/java-ssp-ttl/core/src/main/java/org/apache/clerezza/skeleton/GreetingManager.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 org.apache.clerezza.skeleton;

import java.net.URISyntaxException;
import java.util.concurrent.locks.Lock;
import javax.ws.rs.FormParam;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriInfo;
import org.apache.clerezza.jaxrs.utils.RedirectUtil;
import org.apache.clerezza.jaxrs.utils.TrailingSlash;
import org.apache.clerezza.platform.graphprovider.content.ContentGraphProvider;
import org.apache.clerezza.platform.typerendering.RenderletManager;
import org.apache.clerezza.platform.typerendering.scalaserverpages.ScalaServerPagesRenderlet;
import org.apache.clerezza.rdf.core.BNode;
import org.apache.clerezza.rdf.core.MGraph;
import org.apache.clerezza.rdf.core.UriRef;
import org.apache.clerezza.rdf.core.access.LockableMGraph;
import org.apache.clerezza.rdf.core.impl.PlainLiteralImpl;
import org.apache.clerezza.rdf.core.impl.SimpleMGraph;
import org.apache.clerezza.rdf.core.impl.TripleImpl;
import org.apache.clerezza.rdf.ontologies.RDF;
import org.apache.clerezza.rdf.utils.GraphNode;
import org.apache.clerezza.skeleton.ontologies.GREETINGS;
import org.apache.clerezza.web.fileserver.FileServer;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Property;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.Service;
import org.osgi.service.component.ComponentContext;



@Component
@Service(value=Object.class)
@Property(name="javax.ws.rs", boolValue=true)
@Path("/greeting/manager")
public class GreetingManager extends FileServer {

    @Reference
    private RenderletManager renderletManager;

    @Reference
    private ContentGraphProvider cgProvider;

    public void activate(ComponentContext context) throws URISyntaxException {
        renderletManager.registerRenderlet(ScalaServerPagesRenderlet.class.getName(),
                new UriRef(getClass().getResource(
                "greeting-naked.ssp").toURI().toString()),
                GREETINGS.Greeting, "naked",
                MediaType.APPLICATION_XHTML_XML_TYPE, true);
        configure(context.getBundleContext());
    }

    @GET
    public Response entry(@Context UriInfo uriInfo) {
        TrailingSlash.enforceNotPresent(uriInfo);
        return RedirectUtil.createSeeOtherResponse("manager/new-greeting.xhtml", uriInfo);
    }

    @GET
    @Path("test")
    public GraphNode testGreeting() {
        MGraph resultMGraph = new SimpleMGraph();
        GraphNode result = new GraphNode(new BNode(), resultMGraph);
        result.addProperty(RDF.type, GREETINGS.Greeting);
        result.addProperty(GREETINGS.words, 
                new PlainLiteralImpl("Merhaba!"));
        return result;
    }

    @POST
    @Path("new-greeting")
    public String createNewGreeting(@FormParam("uri") UriRef uri,
            @FormParam("words") String words) {
        LockableMGraph contentGraph = cgProvider.getContentGraph();
        Lock l = contentGraph.getLock().writeLock();
        l.lock();
        try {
            contentGraph.add(new TripleImpl(uri, RDF.type, GREETINGS.Greeting));
            contentGraph.add(new TripleImpl(uri, GREETINGS.words,
                    new PlainLiteralImpl(words)));
        } finally {
            l.unlock();
        }
        return "created";
    }

}