KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > jboss > ejb > plugins > cmp > jdbc > LockingStrategy


1 /*
2 * JBoss, Home of Professional Open Source
3 * Copyright 2005, JBoss Inc., and individual contributors as indicated
4 * by the @authors tag. See the copyright.txt in the distribution for a
5 * full listing of individual contributors.
6 *
7 * This is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU Lesser General Public License as
9 * published by the Free Software Foundation; either version 2.1 of
10 * the License, or (at your option) any later version.
11 *
12 * This software is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this software; if not, write to the Free
19 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21 */
22 package org.jboss.ejb.plugins.cmp.jdbc;
23
24 import org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCCMPFieldBridge;
25 import org.jboss.ejb.EntityEnterpriseContext;
26
27 /**
28  *
29  * @author <a HREF="mailto:alex@jboss.org">Alexey Loubyansky</a>
30  */
31 public interface LockingStrategy
32 {
33    LockingStrategy VERSION = new AbstractStrategy()
34    {
35       public void loaded(JDBCCMPFieldBridge field, EntityEnterpriseContext ctx)
36       {
37          field.lockInstanceValue(ctx);
38       }
39    };
40
41    LockingStrategy GROUP = new AbstractStrategy()
42    {
43       public void loaded(JDBCCMPFieldBridge field, EntityEnterpriseContext ctx)
44       {
45          field.lockInstanceValue(ctx);
46       }
47    };
48
49    LockingStrategy READ = new AbstractStrategy()
50    {
51       public void accessed(JDBCCMPFieldBridge field, EntityEnterpriseContext ctx)
52       {
53          field.lockInstanceValue(ctx);
54       }
55
56       public void changed(JDBCCMPFieldBridge field, EntityEnterpriseContext ctx)
57       {
58          field.lockInstanceValue(ctx);
59       }
60    };
61
62    LockingStrategy MODIFIED = new AbstractStrategy()
63    {
64       public void changed(JDBCCMPFieldBridge field, EntityEnterpriseContext ctx)
65       {
66          field.lockInstanceValue(ctx);
67       }
68    };
69
70    LockingStrategy NONE = new AbstractStrategy(){};
71
72    class AbstractStrategy implements LockingStrategy
73    {
74       public void loaded(JDBCCMPFieldBridge field, EntityEnterpriseContext ctx)
75       {
76       }
77
78       public void accessed(JDBCCMPFieldBridge field, EntityEnterpriseContext ctx)
79       {
80       }
81
82       public void changed(JDBCCMPFieldBridge field, EntityEnterpriseContext ctx)
83       {
84       }
85    }
86
87    void loaded(JDBCCMPFieldBridge field, EntityEnterpriseContext ctx);
88    void accessed(JDBCCMPFieldBridge field, EntityEnterpriseContext ctx);
89    void changed(JDBCCMPFieldBridge field, EntityEnterpriseContext ctx);
90 }
91
Popular Tags