Mercurial > lada > lada-server
comparison src/main/java/de/intevation/lada/util/data/DataTransaction.java @ 457:51784d74a85b
Refactored data access. CDI is much cleaner now.
| author | Raimund Renkert <raimund.renkert@intevation.de> |
|---|---|
| date | Mon, 16 Feb 2015 15:14:48 +0100 |
| parents | |
| children | d74b5b1190ae |
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| 456:dbeb56e913fd | 457:51784d74a85b |
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| 1 /* Copyright (C) 2013 by Bundesamt fuer Strahlenschutz | |
| 2 * Software engineering by Intevation GmbH | |
| 3 * | |
| 4 * This file is Free Software under the GNU GPL (v>=3) | |
| 5 * and comes with ABSOLUTELY NO WARRANTY! Check out | |
| 6 * the documentation coming with IMIS-Labordaten-Application for details. | |
| 7 */ | |
| 8 package de.intevation.lada.util.data; | |
| 9 | |
| 10 import javax.ejb.EJBTransactionRolledbackException; | |
| 11 import javax.ejb.Stateless; | |
| 12 import javax.ejb.TransactionAttribute; | |
| 13 import javax.ejb.TransactionAttributeType; | |
| 14 import javax.inject.Inject; | |
| 15 import javax.persistence.EntityExistsException; | |
| 16 import javax.persistence.EntityManager; | |
| 17 import javax.persistence.Query; | |
| 18 import javax.persistence.TransactionRequiredException; | |
| 19 | |
| 20 /** | |
| 21 * Abstract class implementing low level data operations. | |
| 22 * | |
| 23 * @author <a href="mailto:rrenkert@intevation.de">Raimund Renkert</a> | |
| 24 */ | |
| 25 @Stateless | |
| 26 public class DataTransaction | |
| 27 { | |
| 28 @Inject | |
| 29 protected EntityManagerProducer emp; | |
| 30 | |
| 31 protected String jndiPath; | |
| 32 | |
| 33 /** | |
| 34 * Create object in the database. | |
| 35 * This operation can not be undone. | |
| 36 * | |
| 37 * @param object The object to create | |
| 38 * | |
| 39 * @throws EntityExistsException | |
| 40 * @throws IllegalArgumentException | |
| 41 * @throws EJBTransactionRolledbackException | |
| 42 * @throws TransactionRequiredException | |
| 43 */ | |
| 44 @TransactionAttribute(TransactionAttributeType.REQUIRED) | |
| 45 public void persistInDatabase(Object object, String dataSource) | |
| 46 throws EntityExistsException, | |
| 47 IllegalArgumentException, | |
| 48 EJBTransactionRolledbackException, | |
| 49 TransactionRequiredException | |
| 50 { | |
| 51 emp.entityManager(dataSource).persist(object); | |
| 52 } | |
| 53 | |
| 54 /** | |
| 55 * Create object in the database. | |
| 56 * This operation can not be undone. | |
| 57 * | |
| 58 * @param object The object to create | |
| 59 * | |
| 60 * @throws EntityExistsException | |
| 61 * @throws IllegalArgumentException | |
| 62 * @throws EJBTransactionRolledbackException | |
| 63 * @throws TransactionRequiredException | |
| 64 */ | |
| 65 @TransactionAttribute(TransactionAttributeType.REQUIRED) | |
| 66 public void updateInDatabase(Object object, String dataSource) | |
| 67 throws EntityExistsException, | |
| 68 IllegalArgumentException, | |
| 69 EJBTransactionRolledbackException, | |
| 70 TransactionRequiredException | |
| 71 { | |
| 72 emp.entityManager(dataSource).merge(object); | |
| 73 } | |
| 74 | |
| 75 /** | |
| 76 * Remove an object from the datebase. | |
| 77 * This operation can not be undone. | |
| 78 * | |
| 79 * @param object The object to remove | |
| 80 * | |
| 81 * @throws IllegalArgumentException | |
| 82 * @throws TransactionRequiredException | |
| 83 */ | |
| 84 @TransactionAttribute(TransactionAttributeType.REQUIRED) | |
| 85 public void removeFromDatabase(Object object, String dataSource) | |
| 86 throws IllegalArgumentException, | |
| 87 TransactionRequiredException | |
| 88 { | |
| 89 EntityManager em = emp.entityManager(dataSource); | |
| 90 em.remove( | |
| 91 em.contains(object) ? | |
| 92 object : em.merge(object)); | |
| 93 } | |
| 94 | |
| 95 public Query queryFromString(String sql, String dataSource) { | |
| 96 EntityManager em = emp.entityManager(dataSource); | |
| 97 return em.createNativeQuery(sql); | |
| 98 } | |
| 99 | |
| 100 public EntityManager entityManager(String dataSource) { | |
| 101 return emp.entityManager(dataSource); | |
| 102 } | |
| 103 } |