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:bs@nuxeo.com">Bogdan Stefanescu</a> 039 */ 040public class ReloadingJerseyServlet extends ServletContainer implements Reloadable { 041 042 private static final long serialVersionUID = 1L; 043 044 protected WebEngine engine; 045 046 @Override 047 public void init() throws ServletException { 048 super.init(); 049 engine = Framework.getLocalService(WebEngine.class); 050 } 051 052 @Override 053 public void destroy() { 054 engine = null; 055 super.destroy(); 056 } 057 058 @Override 059 public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 060 if (engine == null) { 061 engine = Framework.getLocalService(WebEngine.class); 062 } 063 String method = request.getMethod().toUpperCase(); 064 if (!"GET".equals(method)) { 065 // force reading properties because jersey is consuming one 066 // character 067 // from the input stream - see WebComponent.isEntityPresent. 068 request.getParameterMap(); 069 } 070 super.service(request, response); 071 } 072 073 public synchronized void reloadIfNeeded() { 074 if (engine.tryReload()) { 075 reload(); 076 } 077 } 078}