Mercurial > lada > lada-server

annotate src/main/java/de/intevation/lada/manage/DataManager.java @ 320:6621f7345c06

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Use 'merge' instead of 'persist' since it saves detached objects, too.
author Raimund Renkert <rrenkert@intevation.de>
date Fri, 23 Aug 2013 11:32:21 +0200
parents a305412206a3
children 9d5e4d4eb90f
rev   line source
170
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
1 package de.intevation.lada.manage;
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
2
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
3 import javax.ejb.EJBTransactionRolledbackException;
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
4 import javax.ejb.Stateless;
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
5 import javax.ejb.TransactionAttribute;
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
6 import javax.ejb.TransactionAttributeType;
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
7 import javax.inject.Inject;
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
8 import javax.inject.Named;
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
9 import javax.persistence.EntityExistsException;
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
10 import javax.persistence.EntityManager;
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
11 import javax.persistence.TransactionRequiredException;
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
12
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
13
210
a305412206a3 Code documentation.
Raimund Renkert <rrenkert@intevation.de>
parents: 190
diff changeset
14 /**
a305412206a3 Code documentation.
Raimund Renkert <rrenkert@intevation.de>
parents: 190
diff changeset
15 * This data manager provides the interface to persist, remove and update
a305412206a3 Code documentation.
Raimund Renkert <rrenkert@intevation.de>
parents: 190
diff changeset
16 * database objects.
a305412206a3 Code documentation.
Raimund Renkert <rrenkert@intevation.de>
parents: 190
diff changeset
17 *
a305412206a3 Code documentation.
Raimund Renkert <rrenkert@intevation.de>
parents: 190
diff changeset
18 * @author <a href="mailto:rrenkert@intevation.de">Raimund Renkert</a>
a305412206a3 Code documentation.
Raimund Renkert <rrenkert@intevation.de>
parents: 190
diff changeset
19 */
170
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
20 @Stateless
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
21 @Named("datamanager")
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
22 public class DataManager
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
23 implements Manager
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
24 {
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
25 @Inject
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
26 private EntityManager em;
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
27
210
a305412206a3 Code documentation.
Raimund Renkert <rrenkert@intevation.de>
parents: 190
diff changeset
28 /**
a305412206a3 Code documentation.
Raimund Renkert <rrenkert@intevation.de>
parents: 190
diff changeset
29 * Create a new database object.
a305412206a3 Code documentation.
Raimund Renkert <rrenkert@intevation.de>
parents: 190
diff changeset
30 *
a305412206a3 Code documentation.
Raimund Renkert <rrenkert@intevation.de>
parents: 190
diff changeset
31 * @param object The new object.
a305412206a3 Code documentation.
Raimund Renkert <rrenkert@intevation.de>
parents: 190
diff changeset
32 */
170
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
33 @Override
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
34 @TransactionAttribute(TransactionAttributeType.REQUIRED)
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
35 public void create(Object object)
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
36 throws EntityExistsException,
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
37 IllegalArgumentException,
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
38 EJBTransactionRolledbackException,
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
39 TransactionRequiredException {
320
6621f7345c06 Use 'merge' instead of 'persist' since it saves detached objects, too.
Raimund Renkert <rrenkert@intevation.de>
parents: 210
diff changeset
40 em.merge(object);
6621f7345c06 Use 'merge' instead of 'persist' since it saves detached objects, too.
Raimund Renkert <rrenkert@intevation.de>
parents: 210
diff changeset
41 //em.persist(object);
170
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
42 }
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
43
210
a305412206a3 Code documentation.
Raimund Renkert <rrenkert@intevation.de>
parents: 190
diff changeset
44 /**
a305412206a3 Code documentation.
Raimund Renkert <rrenkert@intevation.de>
parents: 190
diff changeset
45 * Update a database object.
a305412206a3 Code documentation.
Raimund Renkert <rrenkert@intevation.de>
parents: 190
diff changeset
46 *
a305412206a3 Code documentation.
Raimund Renkert <rrenkert@intevation.de>
parents: 190
diff changeset
47 * @param object The object to update.
a305412206a3 Code documentation.
Raimund Renkert <rrenkert@intevation.de>
parents: 190
diff changeset
48 */
170
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
49 @Override
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
50 @TransactionAttribute(TransactionAttributeType.REQUIRED)
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
51 public void update(Object object)
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
52 throws EntityExistsException,
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
53 IllegalArgumentException,
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
54 EJBTransactionRolledbackException,
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
55 TransactionRequiredException {
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
56 em.merge(object);
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
57 }
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
58
210
a305412206a3 Code documentation.
Raimund Renkert <rrenkert@intevation.de>
parents: 190
diff changeset
59 /**
a305412206a3 Code documentation.
Raimund Renkert <rrenkert@intevation.de>
parents: 190
diff changeset
60 * Delete a database object.
a305412206a3 Code documentation.
Raimund Renkert <rrenkert@intevation.de>
parents: 190
diff changeset
61 *
a305412206a3 Code documentation.
Raimund Renkert <rrenkert@intevation.de>
parents: 190
diff changeset
62 * @param object The object to delete.
a305412206a3 Code documentation.
Raimund Renkert <rrenkert@intevation.de>
parents: 190
diff changeset
63 */
170
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
64 @Override
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
65 @TransactionAttribute(TransactionAttributeType.REQUIRED)
210
a305412206a3 Code documentation.
Raimund Renkert <rrenkert@intevation.de>
parents: 190
diff changeset
66 public void delete(Object object)
190
bf7488ec0e8d Added method to delete objects from database.
Raimund Renkert <rrenkert@intevation.de>
parents: 170
diff changeset
67 throws IllegalArgumentException,
bf7488ec0e8d Added method to delete objects from database.
Raimund Renkert <rrenkert@intevation.de>
parents: 170
diff changeset
68 TransactionRequiredException {
bf7488ec0e8d Added method to delete objects from database.
Raimund Renkert <rrenkert@intevation.de>
parents: 170
diff changeset
69 em.remove(em.contains(object) ? object : em.merge(object));
170
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
70 }
18b234ef3733 New interface for data manager and generic implementation of a data manager.
Raimund Renkert <rrenkert@intevation.de>
parents:
diff changeset
71 }
This site is hosted by Intevation GmbH (Datenschutzerklärung und Impressum | Privacy Policy and Imprint)