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Java > Open Source Codes > com > caucho > amber > entity > RowInvalidateCompletion


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  * Free Software Foundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */
28
29 package com.caucho.amber.entity;
30
31 import com.caucho.amber.query.ResultSetCacheChunk;
32 import com.caucho.util.L10N;
33 import com.caucho.util.Log;
34
35 import java.util.logging.Logger JavaDoc;
36
37 /**
38  * Code to update the cache value on the completion of a transaction.
39  */
40 public class RowInvalidateCompletion extends AmberCompletion {
41   private static final L10N L = new L10N(RowInvalidateCompletion.class);
42   private static final Logger JavaDoc log = Log.open(RowInvalidateCompletion.class);
43
44   private String JavaDoc _table;
45   private Object JavaDoc _key;
46
47   public RowInvalidateCompletion(String JavaDoc table, Object JavaDoc key)
48   {
49     if (table == null || key == null)
50       throw new NullPointerException JavaDoc();
51
52     _table = table;
53     _key = key;
54   }
55
56   /**
57    * Code when the transaction completes.
58    *
59    * @return true if the entry should be deleted.
60    */
61   public boolean complete(AmberEntityHome home,
62               Object JavaDoc key,
63               EntityItem entityItem)
64   {
65     if (home.getEntityType().getTable().getName().equals(_table) &&
66     _key.equals(key)) {
67       entityItem.expire();
68     }
69     else {
70       entityItem.getEntity().__caucho_invalidate_foreign(_table, key);
71     }
72     
73     return false;
74   }
75
76   /**
77    * Code to invalidate the query.
78    *
79    * @return true if the entry should be deleted.
80    */
81   public boolean complete(ResultSetCacheChunk chunk)
82   {
83     if (chunk.invalidate(_table, _key)) {
84       chunk.invalidate();
85       return true;
86     }
87     
88     return false;
89   }
90
91   /**
92    * Returns true for equality.
93    */
94   public boolean equals(Object JavaDoc o)
95   {
96     if (this == o)
97       return true;
98     else if (o == null || o.getClass() != getClass())
99       return false;
100
101     RowInvalidateCompletion comp = (RowInvalidateCompletion) o;
102
103     return _table.equals(comp._table) && _key.equals(comp._key);
104   }
105 }
106
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