| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.commons.chain2.apps.example; |
| |
| import org.apache.commons.chain2.Catalog; |
| import org.apache.commons.chain2.CatalogFactory; |
| import org.apache.commons.chain2.Command; |
| import org.apache.commons.chain2.web.servlet.ServletWebContext; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| import javax.servlet.ServletException; |
| import javax.servlet.http.HttpServlet; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import java.io.IOException; |
| |
| /** |
| * Custom chain servlet implementation. |
| * |
| * @version $Id$ |
| */ |
| public class ExampleServlet extends HttpServlet { |
| |
| /** |
| * |
| */ |
| private static final long serialVersionUID = 20120724L; |
| |
| private String servletName; |
| |
| /** |
| * <p>Cache the name of the servlet.</p> |
| * |
| * @exception ServletException if an initialization error occurs |
| */ |
| public void init() throws ServletException { |
| super.init(); |
| Log log = LogFactory.getLog(ExampleServlet.class); |
| servletName = getServletConfig().getServletName(); |
| if (log.isInfoEnabled()) { |
| log.info("Initializing chain example servlet '" |
| + servletName + "'"); |
| } |
| } |
| |
| /** |
| * <p>Configure a {@link ServletWebContext} for the current request, and |
| * pass it to the <code>execute()</code> method of the specified |
| * {@link Command}, loaded from our configured {@link Catalog}.</p> |
| * |
| * @param request The request we are processing |
| * @param response The response we are creating |
| * |
| * @exception IOException if an input/output error occurs |
| */ |
| public void service(HttpServletRequest request, |
| HttpServletResponse response) |
| throws IOException { |
| |
| CatalogFactory<String, Object, ServletWebContext> factory = CatalogFactory.getInstance(); |
| Catalog<String, Object, ServletWebContext> catalog = factory.getCatalog(servletName); |
| if (catalog == null) { |
| catalog = factory.getCatalog(); |
| } |
| |
| ServletWebContext context = |
| new ServletWebContext(getServletContext(), request, response); |
| Command<String, Object, ServletWebContext> command = catalog.getCommand("COMMAND_MAPPER"); |
| command.execute(context); |
| } |
| |
| } |