001 package org.apache.turbine.pipeline;
002
003
004 /*
005 * Licensed to the Apache Software Foundation (ASF) under one
006 * or more contributor license agreements. See the NOTICE file
007 * distributed with this work for additional information
008 * regarding copyright ownership. The ASF licenses this file
009 * to you under the Apache License, Version 2.0 (the
010 * "License"); you may not use this file except in compliance
011 * with the License. You may obtain a copy of the License at
012 *
013 * http://www.apache.org/licenses/LICENSE-2.0
014 *
015 * Unless required by applicable law or agreed to in writing,
016 * software distributed under the License is distributed on an
017 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
018 * KIND, either express or implied. See the License for the
019 * specific language governing permissions and limitations
020 * under the License.
021 */
022
023
024 import java.io.IOException;
025
026 import org.apache.turbine.Turbine;
027 import org.apache.turbine.TurbineConstants;
028 import org.apache.turbine.modules.Action;
029 import org.apache.turbine.modules.ActionLoader;
030 import org.apache.turbine.services.assemblerbroker.TurbineAssemblerBroker;
031 import org.apache.turbine.util.TurbineException;
032
033 /**
034 * Implements the action portion of the "Turbine classic" processing
035 * pipeline (from the Turbine 2.x series).
036 *
037 * @author <a href="mailto:jvanzyl@apache.org">Jason van Zyl</a>\
038 * @author <a href="mailto:peter@courcoux.biz">Peter Courcoux</a>
039 * @version $Id: DefaultSessionValidationValve.java 758254 2009-03-25 13:41:02Z tv $
040 */
041 public class DefaultSessionValidationValve
042 extends AbstractValve
043 {
044 private ActionLoader actionLoader;
045
046 public DefaultSessionValidationValve()
047 throws Exception
048 {
049 // empty constructor
050 }
051
052 /**
053 * Initialize this valve for use in a pipeline.
054 *
055 * @see org.apache.turbine.pipeline.AbstractValve#initialize()
056 */
057 public void initialize() throws Exception
058 {
059 super.initialize();
060
061 this.actionLoader = (ActionLoader)TurbineAssemblerBroker.getLoader(Action.NAME);
062 }
063
064 /**
065 * @see org.apache.turbine.Valve#invoke(RunData, ValveContext)
066 */
067 public void invoke(PipelineData pipelineData, ValveContext context)
068 throws IOException, TurbineException
069 {
070 try
071 {
072 // This is where the validation of the Session information
073 // is performed if the user has not logged in yet, then
074 // the screen is set to be Login. This also handles the
075 // case of not having a screen defined by also setting the
076 // screen to Login. If you want people to go to another
077 // screen other than Login, you need to change that within
078 // TurbineResources.properties...screen.homepage; or, you
079 // can specify your own SessionValidator action.
080 actionLoader.exec(pipelineData,
081 Turbine.getConfiguration().getString(
082 TurbineConstants.ACTION_SESSION_VALIDATOR_KEY,
083 TurbineConstants.ACTION_SESSION_VALIDATOR_DEFAULT));
084 }
085 catch (Exception e)
086 {
087 throw new TurbineException(e);
088 }
089
090 // Pass control to the next Valve in the Pipeline
091 context.invokeNext(pipelineData);
092 }
093 }