AbstractManager.java
5.96 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2009 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
* [name of copyright owner]"
*
* Contributor(s):
*
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package jsf2.demo.scrum.web.controller;
import java.util.ResourceBundle;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.annotation.Resource;
import javax.faces.application.FacesMessage;
import javax.faces.application.FacesMessage.Severity;
import javax.faces.context.FacesContext;
import javax.faces.event.SystemEvent;
import javax.faces.event.SystemEventListener;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceUnit;
import javax.persistence.EntityManagerFactory;
import javax.transaction.UserTransaction;
/**
*
* @author Dr. Spock (spock at dev.java.net)
*/
public abstract class AbstractManager {
@PersistenceUnit
private EntityManagerFactory emf;
@Resource
private UserTransaction userTransaction;
protected final <T> T doInTransaction(PersistenceAction<T> action) throws ManagerException {
EntityManager em = emf.createEntityManager();
try {
userTransaction.begin();
T result = action.execute(em);
userTransaction.commit();
return result;
} catch (Exception e) {
try {
userTransaction.rollback();
} catch (Exception ex) {
Logger.getLogger(AbstractManager.class.getName()).log(Level.SEVERE, null, ex);
}
throw new ManagerException(e);
} finally {
em.close();
}
}
protected final void doInTransaction(PersistenceActionWithoutResult action) throws ManagerException {
EntityManager em = emf.createEntityManager();
try {
userTransaction.begin();
action.execute(em);
userTransaction.commit();
} catch (Exception e) {
try {
userTransaction.rollback();
} catch (Exception ex) {
Logger.getLogger(AbstractManager.class.getName()).log(Level.SEVERE, null, ex);
}
throw new ManagerException(e);
} finally {
em.close();
}
}
protected static interface PersistenceAction<T> {
T execute(EntityManager em);
}
protected static interface PersistenceActionWithoutResult {
void execute(EntityManager em);
}
protected void addMessage(String message) {
addMessage(null, message, FacesMessage.SEVERITY_INFO);
}
protected void addMessage(String componentId, String message) {
addMessage(componentId, message, FacesMessage.SEVERITY_INFO);
}
protected void addMessage(String message, Severity severity) {
addMessage(null, message, severity);
}
protected void addMessage(String componentId, String message, Severity severity) {
FacesContext.getCurrentInstance().addMessage(componentId, new FacesMessage(severity, message, message));
}
protected String getMessageForKey(String key) {
FacesContext ctx = FacesContext.getCurrentInstance();
ResourceBundle rb = ctx.getApplication().getResourceBundle(ctx, "i18n");
return rb.getString(key);
}
protected FacesMessage getFacesMessageForKey(String key) {
return new FacesMessage(getMessageForKey(key));
}
protected Logger getLogger(Class<?> clazz) {
if (clazz == null) {
throw new IllegalArgumentException("Class for logger is required.");
}
return Logger.getLogger(clazz.getName());
}
protected void publishEvent(Class<? extends SystemEvent> eventClass, Object source) {
if (source != null) {
FacesContext ctx = FacesContext.getCurrentInstance();
ctx.getApplication().publishEvent(ctx, eventClass, source);
}
}
protected void subscribeToEvent(Class<? extends SystemEvent> eventClass, SystemEventListener listener) {
FacesContext.getCurrentInstance().getApplication().subscribeToEvent(eventClass, listener);
}
protected void unsubscribeFromEvent(Class<? extends SystemEvent> eventClass, SystemEventListener listener) {
FacesContext.getCurrentInstance().getApplication().unsubscribeFromEvent(eventClass, listener);
}
}