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    1   package org.apache.turbine.pipeline;
    2
    3
    4   /*
    5    * Licensed to the Apache Software Foundation (ASF) under one
    6    * or more contributor license agreements.  See the NOTICE file
    7    * distributed with this work for additional information
    8    * regarding copyright ownership.  The ASF licenses this file
    9    * to you under the Apache License, Version 2.0 (the
    10   * "License"); you may not use this file except in compliance
    11   * with the License.  You may obtain a copy of the License at
    12   *
    13   *   http://www.apache.org/licenses/LICENSE-2.0
    14   *
    15   * Unless required by applicable law or agreed to in writing,
    16   * software distributed under the License is distributed on an
    17   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    18   * KIND, either express or implied.  See the License for the
    19   * specific language governing permissions and limitations
    20   * under the License.
    21   */
    22
    23
    24  import java.io.IOException;
    25
    26  import org.apache.turbine.util.RunData;
    27  import org.apache.turbine.util.TurbineException;
    28  import org.apache.turbine.util.security.AccessControlList;
    29
    30  /**
    31   * Implements the RunData target portion of the "Turbine classic"
    32   * processing pipeline (from the Turbine 2.x series).
    33   *
    34   * @author <a href="mailto:jvanzyl@apache.org">Jason van Zyl</a>
    35   * @author <a href="mailto:jon@latchkey.com">Jon S. Stevens</a>
    36   * @author <a href="mailto:dlr@finemaltcoding.com">Daniel Rall</a>
    37   * @author <a href="mailto:mikeh@apache.org">Mike Haberman</a>
    38   * @author <a href="mailto:james@jamestaylor.org">James Taylor</a>
    39   * @author <a href="mailto:mpoeschl@marmot.at">Martin Poeschl</a>
    40   * @author <a href="mailto:peter@courcoux.biz">Peter Courcoux</a>
    41   * @version $Id: CleanUpValve.java 757213 2009-03-22 16:43:31Z tv $
    42   */
    43  public class CleanUpValve
    44      extends AbstractValve
    45  {
    46      /**
    47       * Creates a new instance.
    48       */
    49      public CleanUpValve()
    50      {
    51          // empty constructor
    52      }
    53
    54      /**
    55       * @see org.apache.turbine.Valve#invoke(RunData, ValveContext)
    56       */
    57      public void invoke(PipelineData pipelineData, ValveContext context)
    58          throws IOException, TurbineException
    59      {
    60          try
    61          {
    62              cleanUp(pipelineData);
    63          }
    64          catch (Exception e)
    65          {
    66              throw new TurbineException(e);
    67          }
    68
    69          // Pass control to the next Valve in the Pipeline
    70          context.invokeNext(pipelineData);
    71      }
    72
    73      /**
    74       * Perform clean up after processing the request.
    75       *
    76       * @param data The run-time data.
    77       */
    78      protected void cleanUp(PipelineData pipelineData)
    79          throws Exception
    80      {
    81          RunData data = getRunData(pipelineData);
    82          // If a module has set data.acl = null, remove acl from
    83          // the session.
    84          if (data.getACL() == null)
    85          {
    86              try
    87              {
    88                  data.getSession().removeAttribute
    89                      (AccessControlList.SESSION_KEY);
    90              }
    91              catch (IllegalStateException invalidatedSession)
    92              {
    93                  // Web was used to shut us down. Trying to clean up
    94                  // our stuff, but it's already been done for us.
    95              }
    96          }
    97      }
    98  }