01: /*
02: * JBoss, Home of Professional Open Source.
03: * Copyright 2006, Red Hat Middleware LLC, and individual contributors
04: * as indicated by the @author tags. See the copyright.txt file in the
05: * distribution for a full listing of individual contributors.
06: *
07: * This is free software; you can redistribute it and/or modify it
08: * under the terms of the GNU Lesser General Public License as
09: * 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: LockingStrategy VERSION = new AbstractStrategy() {
33: public void loaded(JDBCCMPFieldBridge field,
34: EntityEnterpriseContext ctx) {
35: field.lockInstanceValue(ctx);
36: }
37: };
38:
39: LockingStrategy GROUP = new AbstractStrategy() {
40: public void loaded(JDBCCMPFieldBridge field,
41: EntityEnterpriseContext ctx) {
42: field.lockInstanceValue(ctx);
43: }
44: };
45:
46: LockingStrategy READ = new AbstractStrategy() {
47: public void accessed(JDBCCMPFieldBridge field,
48: EntityEnterpriseContext ctx) {
49: field.lockInstanceValue(ctx);
50: }
51:
52: public void changed(JDBCCMPFieldBridge field,
53: EntityEnterpriseContext ctx) {
54: field.lockInstanceValue(ctx);
55: }
56: };
57:
58: LockingStrategy MODIFIED = new AbstractStrategy() {
59: public void changed(JDBCCMPFieldBridge field,
60: EntityEnterpriseContext ctx) {
61: field.lockInstanceValue(ctx);
62: }
63: };
64:
65: LockingStrategy NONE = new AbstractStrategy() {
66: };
67:
68: class AbstractStrategy implements LockingStrategy {
69: public void loaded(JDBCCMPFieldBridge field,
70: EntityEnterpriseContext ctx) {
71: }
72:
73: public void accessed(JDBCCMPFieldBridge field,
74: EntityEnterpriseContext ctx) {
75: }
76:
77: public void changed(JDBCCMPFieldBridge field,
78: EntityEnterpriseContext ctx) {
79: }
80: }
81:
82: void loaded(JDBCCMPFieldBridge field, EntityEnterpriseContext ctx);
83:
84: void accessed(JDBCCMPFieldBridge field, EntityEnterpriseContext ctx);
85:
86: void changed(JDBCCMPFieldBridge field, EntityEnterpriseContext ctx);
87: }
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