去年rails正火的时候，仿active record用hibernate实现了一个BasePo，当时用的是一个
静态sessionfactory注入的方式，感觉很不好，当明也没想到好的方案，后来发现有人通过
threadlocal实现了下面这个，可以看看：
1 public class Persistent implements Lifecycle, Validatable, Serializable {
2
3 protected Serializable _id;
4 protected int _version;
5
6 public Serializable getIdentifier() {
7 return _id;
8 }
9 public void setIdentifier(Serializable id) {
10 _id = id;
11 }
12 public int getVersion() {
13 return _version;
14 }
15 public void setVersion(int version) {
16 _version = version;
17 }
18
19 public Long persist() throws HibernateException, SQLException {
20 HibernateSession.currentSession().saveOrUpdate(this);
21 return _id;
22 }
23 public void delete() throws HibernateException, SQLException {
24 HibernateSession.currentSession().delete(this);
25 }
26 public void refresh() throws HibernateException, SQLException {
27 HibernateSession.currentSession().load(this, _id);
28 }
29 public void lock() throws HibernateException, SQLException {
30 HibernateSession.currentSession().lock(this, LockMode.UPGRADE);
31 }
32
33 public boolean onSave(Session s) throws CallbackException {
34 return NO_VETO;
35 }
36 public boolean onDelete(Session s) throws CallbackException {
37 return NO_VETO;
38 }
39 public boolean onUpdate(Session s) throws CallbackException {
40 return NO_VETO;
41 }
42 public void onLoad(Session s, Serializable id) {
43 _id = id;
44 }
45
46 public void validate() throws ValidationFailure {
47 }
48 }
原文：http://hibernate.bluemars.net/46.html?cmd=prntdoc
下面是hibernatesession的源码，应该考滤一下如何与spring事务结合的问题(还是加一个doInTransaction 的callback?)
1 import java.util.Collection;
2
3 import net.sf.hibernate.HibernateException;
4 import net.sf.hibernate.Session;
5 import net.sf.hibernate.Transaction;
6
7 import org.apache.commons.logging.Log;
8 import org.apache.commons.logging.LogFactory;
9
10 /**
11 * @author Ralph Schaer
12 * @version $Revision: 1.6 $ $Date: 2004/05/22 12:24:32 $
13 */
14 public class HibernateSession {
15
16 private static final Log LOG = LogFactory.getLog(HibernateSession.class);
17 public static final ThreadLocal SESSION = new ThreadLocal();
18
19 public static Session currentSession() throws HibernateException {
20
21 Session s = (Session) SESSION.get();
22 if (s == null) {
23 s = HibernateFactoryManager.getSessionFactory().openSession();
24 SESSION.set(s);
25 }
26 return s;
27 }
28
29 public static Session getSession() throws HibernateException {
30 return HibernateFactoryManager.getSessionFactory().openSession();
31 }
32
33 public static void closeSession() {
34 try {
35 Session s = (Session) SESSION.get();
36 SESSION.set(null);
37 if (s != null) {
38 s.close();
39 }
40
41 } catch (HibernateException e) {
42 LOG.error("HibernateSession: closeSession", e);
43 }
44
45 }
46
47 public static void rollback(Transaction tx) {
48 if (tx != null) {
49 try {
50 tx.rollback();
51 closeSession();
52 } catch (HibernateException he) {
53 LOG.error("HibernateSession: rollback", he);
54 }
55 }
56 }
57
58 //Utility methods
59 public static int collectionSize(Collection coll) throws HibernateException {
60 return ((Integer) currentSession().createFilter(coll, "select count(*)").iterate().next()).intValue();
61 }
62
63 }
还有一种考虑泛型的方式可以参考：
http://privacyneed.info/index.php?hl=f5&q=uggc%3A%2F%2Fcrgreonpxyhaq.oybtfcbg.pbz%2F2007%2F07%2Fvzcyrzragvat-npgvirerpbeq-va-wnin.ugzy
posted on 2008-03-28 11:30
liunix 阅读(465)
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