1 /* 2 * $Id$ 3 * 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 */ 21 package org.apache.struts.tiles; 22 23 import jakarta.servlet.ServletException; 24 25 import org.apache.struts.Globals; 26 import org.apache.struts.action.ActionServlet; 27 import org.apache.struts.action.RequestProcessor; 28 import org.apache.struts.config.ModuleConfig; 29 30 31 /** 32 * <p> 33 * WebLogic (at least v6 and v7) attempts to serialize the TilesRequestProcessor 34 * when re-deploying the Webapp in development mode. The TilesRequestProcessor 35 * is not serializable, and loses the Tiles definitions. This results in 36 * NullPointerException and/or NotSerializableException when using the app after 37 * automatic redeploy. 38 * </p> 39 * <p> 40 * This bug report proposes a workaround for this problem, in the hope it will 41 * help others and maybe motivate an actual fix. 42 * </p> 43 * <p> 44 * The attached class extends the Struts Action servlet and fixes the problem by 45 * reloading the Tiles definitions when they have disappeared. 46 * </p> 47 * <p> 48 * For background discussion see 49 * http://issues.apache.org/bugzilla/show_bug.cgi?id=26322 50 * </p> 51 * @version $Rev$ $Date$ 52 * @since 1.2.1 53 */ 54 public class RedeployableActionServlet extends ActionServlet { 55 private static final long serialVersionUID = -3277829251603784258L; 56 57 private TilesRequestProcessor tileProcessor; 58 59 protected synchronized RequestProcessor 60 getRequestProcessor(ModuleConfig config) throws ServletException { 61 62 if (tileProcessor != null) { 63 TilesRequestProcessor processor = (TilesRequestProcessor) super.getRequestProcessor(config); 64 return processor; 65 } 66 67 // reset the request processor 68 String requestProcessorKey = Globals.REQUEST_PROCESSOR_KEY + 69 config.getPrefix(); 70 getServletContext().removeAttribute(requestProcessorKey); 71 72 // create a new request processor instance 73 TilesRequestProcessor processor = (TilesRequestProcessor) super.getRequestProcessor(config); 74 75 tileProcessor = processor; 76 77 try { 78 // reload Tiles defs 79 DefinitionsFactory factory = processor.getDefinitionsFactory(); 80 factory.init(factory.getConfig(), getServletContext()); 81 // System.out.println("reloaded tiles-definitions"); 82 } catch (DefinitionsFactoryException e) { 83 e.printStackTrace(); 84 } 85 86 return processor; 87 } 88 }