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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.Turbine;
27  import org.apache.turbine.TurbineConstants;
28  import org.apache.turbine.modules.Action;
29  import org.apache.turbine.modules.ActionLoader;
30  import org.apache.turbine.services.assemblerbroker.TurbineAssemblerBroker;
31  import org.apache.turbine.util.TurbineException;
32  
33  /**
34   * Implements the action portion of the "Turbine classic" processing
35   * pipeline (from the Turbine 2.x series).
36   *
37   * @author <a href="mailto:jvanzyl@apache.org">Jason van Zyl</a>
38   * @author <a href="mailto:peter@courcoux.biz">Peter Courcoux</a>
39   * @version $Id: DefaultACLCreationValve.java 758254 2009-03-25 13:41:02Z tv $
40   */
41  public class DefaultACLCreationValve
42      extends AbstractValve
43  {
44      private ActionLoader actionLoader;
45  
46      /**
47       * Here we can setup objects that are thread safe and can be
48       * reused. We setup the session validator and the access
49       * controller.
50       */
51      public DefaultACLCreationValve()
52          throws Exception
53      {
54          // empty constructor
55      }
56      
57      /**
58       * Initialize this valve for use in a pipeline.
59       * 
60       * @see org.apache.turbine.pipeline.AbstractValve#initialize()
61       */
62      public void initialize() throws Exception
63      {
64          super.initialize();
65          
66          this.actionLoader = (ActionLoader)TurbineAssemblerBroker.getLoader(Action.NAME);
67      }
68  
69      /**
70       * @see org.apache.turbine.Valve#invoke(RunData, ValveContext)
71       */
72      public void invoke(PipelineData pipelineData, ValveContext context)
73          throws IOException, TurbineException
74      {
75          try
76          {
77              // Put the Access Control List into the RunData object, so
78              // it is easily available to modules.  It is also placed
79              // into the session for serialization.  Modules can null
80              // out the ACL to force it to be rebuilt based on more
81              // information.
82              actionLoader.exec(
83                      pipelineData, Turbine.getConfiguration().getString(
84                              TurbineConstants.ACTION_ACCESS_CONTROLLER_KEY,
85                              TurbineConstants.ACTION_ACCESS_CONTROLLER_DEFAULT));
86          }
87          catch (Exception e)
88          {
89              throw new TurbineException(e);
90          }
91  
92          // Pass control to the next Valve in the Pipeline
93          context.invokeNext(pipelineData);
94      }
95  }