| /* |
| * 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.Command; |
| import org.apache.commons.chain2.Context; |
| 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.RequestDispatcher; |
| import java.io.IOException; |
| |
| /** |
| * <p>Forward Command</p> |
| * |
| * @version $Id$ |
| */ |
| public class ForwardCommand implements Command<String, Object, ServletWebContext<String, Object>> { |
| |
| private Log log = LogFactory.getLog(ForwardCommand.class); |
| |
| private String forward; |
| |
| /** |
| * Return the uri to forward to. |
| * |
| * @return The uri to forward to |
| */ |
| public String getForward() { |
| return forward; |
| } |
| |
| /** |
| * Set the uri to forward to. |
| * |
| * @param forward The uri to forward to |
| */ |
| public void setForward(String forward) { |
| this.forward = forward; |
| } |
| |
| /** |
| * <p>Execute the command.</p> |
| * |
| * @param context The {@link Context} we are operating on |
| * @return <code>false</code> so that processng will continue |
| */ |
| public boolean execute(ServletWebContext<String, Object> context) { |
| try { |
| String uri = getForward(context); |
| if (uri != null) { |
| if (log.isDebugEnabled()) { |
| log.debug("Forwarding to " + uri); |
| } |
| RequestDispatcher rd = context.getContext().getRequestDispatcher(uri); |
| rd.forward(context.getRequest(), context.getResponse()); |
| return true; |
| } else { |
| if (log.isDebugEnabled()) { |
| log.debug("No forward found"); |
| } |
| return false; |
| } |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } catch (ServletException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| /** |
| * Return the uri to forward to. |
| * |
| * @param context The {@link Context} we are operating on |
| * @return The uri to forward to |
| */ |
| protected String getForward(ServletWebContext<String, Object> context) { |
| String uri = (String)context.get("forward"); |
| if (uri == null) { |
| uri = getForward(); |
| } |
| return uri; |
| } |
| |
| } |