001package 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
024import java.io.IOException;
025
026import org.apache.turbine.TurbineConstants;
027import org.apache.turbine.annotation.TurbineConfiguration;
028import org.apache.turbine.annotation.TurbineLoader;
029import org.apache.turbine.modules.Action;
030import org.apache.turbine.modules.ActionLoader;
031import 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 $Id$
040 */
041public class DefaultSessionValidationValve
042    implements Valve
043{
044    /** Injected loader instance */
045    @TurbineLoader( Action.class )
046    private ActionLoader actionLoader;
047
048    @TurbineConfiguration( TurbineConstants.ACTION_SESSION_VALIDATOR_KEY )
049    private String actionSessionValidator = TurbineConstants.ACTION_SESSION_VALIDATOR_DEFAULT;
050
051    /**
052     * @see org.apache.turbine.pipeline.Valve#invoke(PipelineData, ValveContext)
053     */
054    @Override
055    public void invoke(PipelineData pipelineData, ValveContext context)
056        throws IOException, TurbineException
057    {
058        try
059        {
060            // This is where the validation of the Session information
061            // is performed if the user has not logged in yet, then
062            // the screen is set to be Login. This also handles the
063            // case of not having a screen defined by also setting the
064            // screen to Login. If you want people to go to another
065            // screen other than Login, you need to change that within
066            // TurbineResources.properties...screen.homepage; or, you
067            // can specify your own SessionValidator action.
068            actionLoader.exec(pipelineData, actionSessionValidator);
069        }
070        catch (Exception e)
071        {
072            throw new TurbineException(e);
073        }
074
075        // Pass control to the next Valve in the Pipeline
076        context.invokeNext(pipelineData);
077    }
078}