001/* 002 * (C) Copyright 2006-2010 Nuxeo SAS (http://nuxeo.com/) and contributors. 003 * 004 * All rights reserved. This program and the accompanying materials 005 * are made available under the terms of the GNU Lesser General Public License 006 * (LGPL) version 2.1 which accompanies this distribution, and is available at 007 * http://www.gnu.org/licenses/lgpl.html 008 * 009 * This library is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * Contributors: 015 * bstefanescu 016 */ 017package org.nuxeo.ecm.webengine.app.jersey; 018 019import java.io.IOException; 020 021import javax.servlet.ServletException; 022import javax.servlet.http.HttpServletRequest; 023import javax.servlet.http.HttpServletResponse; 024 025import org.nuxeo.ecm.webengine.WebEngine; 026import org.nuxeo.ecm.webengine.jaxrs.Reloadable; 027import org.nuxeo.runtime.api.Framework; 028 029import com.sun.jersey.spi.container.servlet.ServletContainer; 030 031/** 032 * JAX-RS servlet based on jersey servlet to provide hot reloading. 033 * <p> 034 * Use it as the webengine servlet in web.xml if you want hot reload, otherwise use {@link ServletContainer}. 035 * 036 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a> 037 */ 038public class ReloadingJerseyServlet extends ServletContainer implements Reloadable { 039 040 private static final long serialVersionUID = 1L; 041 042 protected WebEngine engine; 043 044 @Override 045 public void init() throws ServletException { 046 super.init(); 047 engine = Framework.getLocalService(WebEngine.class); 048 } 049 050 @Override 051 public void destroy() { 052 engine = null; 053 super.destroy(); 054 } 055 056 @Override 057 public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 058 if (engine == null) { 059 engine = Framework.getLocalService(WebEngine.class); 060 } 061 String method = request.getMethod().toUpperCase(); 062 if (!"GET".equals(method)) { 063 // force reading properties because jersey is consuming one 064 // character 065 // from the input stream - see WebComponent.isEntityPresent. 066 request.getParameterMap(); 067 } 068 super.service(request, response); 069 } 070 071 public synchronized void reloadIfNeeded() { 072 if (engine.tryReload()) { 073 reload(); 074 } 075 } 076}