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: DefaultACLCreationValve.java 758254 2009-03-25 13:41:02Z tv $
040     */
041    public class DefaultACLCreationValve
042        extends AbstractValve
043    {
044        private ActionLoader actionLoader;
045    
046        /**
047         * Here we can setup objects that are thread safe and can be
048         * reused. We setup the session validator and the access
049         * controller.
050         */
051        public DefaultACLCreationValve()
052            throws Exception
053        {
054            // empty constructor
055        }
056        
057        /**
058         * Initialize this valve for use in a pipeline.
059         * 
060         * @see org.apache.turbine.pipeline.AbstractValve#initialize()
061         */
062        public void initialize() throws Exception
063        {
064            super.initialize();
065            
066            this.actionLoader = (ActionLoader)TurbineAssemblerBroker.getLoader(Action.NAME);
067        }
068    
069        /**
070         * @see org.apache.turbine.Valve#invoke(RunData, ValveContext)
071         */
072        public void invoke(PipelineData pipelineData, ValveContext context)
073            throws IOException, TurbineException
074        {
075            try
076            {
077                // Put the Access Control List into the RunData object, so
078                // it is easily available to modules.  It is also placed
079                // into the session for serialization.  Modules can null
080                // out the ACL to force it to be rebuilt based on more
081                // information.
082                actionLoader.exec(
083                        pipelineData, Turbine.getConfiguration().getString(
084                                TurbineConstants.ACTION_ACCESS_CONTROLLER_KEY,
085                                TurbineConstants.ACTION_ACCESS_CONTROLLER_DEFAULT));
086            }
087            catch (Exception e)
088            {
089                throw new TurbineException(e);
090            }
091    
092            // Pass control to the next Valve in the Pipeline
093            context.invokeNext(pipelineData);
094        }
095    }