001/*
002 * (C) Copyright 2006-2010 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     bstefanescu
018 */
019package org.nuxeo.ecm.webengine.app.jersey;
020
021import java.io.IOException;
022
023import javax.servlet.ServletException;
024import javax.servlet.http.HttpServletRequest;
025import javax.servlet.http.HttpServletResponse;
026
027import org.nuxeo.ecm.webengine.WebEngine;
028import org.nuxeo.ecm.webengine.jaxrs.Reloadable;
029import org.nuxeo.runtime.api.Framework;
030
031import com.sun.jersey.spi.container.servlet.ServletContainer;
032
033/**
034 * JAX-RS servlet based on jersey servlet to provide hot reloading.
035 * <p>
036 * Use it as the webengine servlet in web.xml if you want hot reload, otherwise use {@link ServletContainer}.
037 *
038 * @author <a href="mailto:[email protected]">Bogdan Stefanescu</a>
039 */
040public class ReloadingJerseyServlet extends ServletContainer implements Reloadable {
041
042    private static final long serialVersionUID = 1L;
043
044    @Override
045    public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
046        String method = request.getMethod().toUpperCase();
047        if (!"GET".equals(method)) {
048            // force reading properties because jersey is consuming one
049            // character
050            // from the input stream - see WebComponent.isEntityPresent.
051            request.getParameterMap();
052        }
053        super.service(request, response);
054    }
055
056    public synchronized void reloadIfNeeded() {
057        WebEngine engine = Framework.getService(WebEngine.class);
058        if (engine.tryReload()) {
059            reload();
060        }
061    }
062}