001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017 package org.apache.geronimo.webservices;
018
019 import java.io.IOException;
020 import javax.servlet.Servlet;
021 import javax.servlet.ServletConfig;
022 import javax.servlet.ServletContext;
023 import javax.servlet.ServletException;
024 import javax.servlet.ServletRequest;
025 import javax.servlet.ServletResponse;
026 import javax.xml.rpc.server.ServiceLifecycle;
027
028 /**
029 * Delegates requests to a WebServiceContainer which is presumably for a POJO WebService
030 * Nothing stopping us from using this for EJBs or other types of webservices other than
031 * it is more than we need. EJB webservices use the JettyEJBWebServiceContext.
032 * <p/>
033 * From a 10,000 foot view the Jetty architecture has:
034 * Container -> Context -> Holder -> Servlet
035 * <p/>
036 * A Container has multiple Contexts, typically webapps
037 * A Context provides the JNDI, TX, and Security for the webapp and has many Holders
038 * A Holder simply wraps each Servlet
039 * <p/>
040 * The POJO Web Service architecture on Jetty looks like this:
041 * Container -> WebApp Context -> JettyPOJOWebServiceHolder -> POJOWebServiceServlet
042 * <p/>
043 * The EJB Web Service architecure, on the other hand, creates one Context for each EJB:
044 * Container -> JettyEJBWebServiceContext
045 *
046 * @version $Rev: 706640 $ $Date: 2008-10-21 14:44:05 +0000 (Tue, 21 Oct 2008) $
047 */
048 public class POJOWebServiceServlet implements Servlet {
049 public static final String POJO_CLASS = POJOWebServiceServlet.class.getName()+"@pojoClassName";
050 private Servlet stack;
051
052 public void init(ServletConfig config) throws ServletException {
053 ServletContext context = config.getServletContext();
054
055 String pojoClassID = config.getInitParameter(POJO_CLASS);
056 Class pojoClass = (Class) context.getAttribute(pojoClassID);
057
058 Object pojo;
059 try {
060 pojo = pojoClass.newInstance();
061 } catch (Exception e) {
062 throw new ServletException("Unable to instantiate POJO WebService class: " + pojoClass.getName(), e);
063 }
064
065 stack = new WebServiceContainerInvoker(pojo);
066 if (pojo instanceof ServiceLifecycle) {
067 stack = new ServiceLifecycleManager(stack,(ServiceLifecycle)pojo);
068 }
069
070
071 stack.init(config);
072 }
073
074 public ServletConfig getServletConfig() {
075 return stack.getServletConfig();
076 }
077
078 public void service(ServletRequest servletRequest, ServletResponse servletResponse) throws ServletException, IOException {
079 stack.service(servletRequest, servletResponse);
080 }
081
082 public String getServletInfo() {
083 return stack.getServletInfo();
084 }
085
086 public void destroy() {
087 stack.destroy();
088 }
089 }