RemoveUserIndexOperation


1   /*
2    * Created on Jul 16, 2003
3    *
4    * Authored by: Mindaugas Idzelis  (min@idzelis.com)
5    */
6   package org.roller.business.search.operations;
7   
8   import java.io.IOException  ;
9   import java.util.Date  ;
10  
11  import org.apache.commons.logging.Log;
12  import org.apache.commons.logging.LogFactory;
13  import org.apache.lucene.index.IndexReader;
14  import org.apache.lucene.index.Term;
15  import org.roller.business.IndexManagerImpl;
16  import org.roller.business.search.FieldConstants;
17  import org.roller.business.search.IndexUtil;
18  import org.roller.pojos.UserData;
19  
20  
21  /**
22   * @author aim4min
23   *
24   * An index operation that rebuilds a given users index (or all indexes.)
25   */
26  public class RemoveUserIndexOperation extends WriteToIndexOperation
27  {
28      //~ Static fields/initializers =============================================
29  
30      private static Log mLogger =
31          LogFactory.getFactory().getInstance(RemoveUserIndexOperation.class);
32  
33      //~ Instance fields ========================================================
34  
35      private UserData user;
36  
37      //~ Constructors ===========================================================
38  
39      /**
40       * Create a new operation that will recreate an index.
41       *
42       * @param website The website to rebuild the index for, or null for all users.
43       */
44      public RemoveUserIndexOperation(IndexManagerImpl mgr, UserData user)
45      {
46          super(mgr);
47          this.user = user;
48      }
49  
50      //~ Methods ================================================================
51  
52      /* (non-Javadoc)
53       * @see java.lang.Runnable#run()
54       */
55      public void doRun()
56      {
57          Date   start = new Date  ();
58  
59          IndexReader reader = beginDeleting();
60  
61          try
62          {
63              if (reader != null)
64              {
65                  String   userName = null;
66                  if (user != null)
67                  {
68                      userName = user.getUserName();
69                  }
70                  Term tUsername =
71                      IndexUtil.getTerm(FieldConstants.USERNAME, userName);
72  
73                  if (tUsername != null)
74                  {
75                      reader.delete(tUsername);
76                  }
77              }
78          }
79          catch (IOException   e)
80          {
81              mLogger.info("Problems deleting doc from index", e);
82          }
83          finally
84          {
85              endDeleting();
86          }
87  
88          Date   end = new Date  ();
89          double length = (end.getTime() - start.getTime()) / (double) 1000;
90  
91          if (user != null)
92          {
93              mLogger.info("Completed deleting indices for '" +
94                              user.getUserName() + "' in '" + length + "' seconds");
95          }
96      }
97  }
98
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