拦截器
import java.io.Serializable;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
import org.hibernate.CallbackException;
import org.hibernate.EntityMode;
import org.hibernate.Interceptor;
import org.hibernate.Transaction;
import org.hibernate.type.Type;
public class TestInterceptor implements Interceptor,Serializable{
private Set inserts = new HashSet();
private Set updates = new HashSet();
// Session初化一个持久对象 如果这方法中改变了对象属性就返回true 否则null
public boolean onLoad(Object entity, Serializable id, Object[] state, String[] propertyNames, Type[] types) throws CallbackException {
return false ;
}
// Session flush()中检查到脏数据是调用 如:tr.commit() .
public boolean onFlushDirty(Object entity, Serializable id, Object[] currentState, Object[] previousState, String[] propertyNames, Type[] types) throws CallbackException {
updates.add(entity);
return false ;
}
// Session Save() 当修改了对象属性返回true
public boolean onSave(Object entity, Serializable id, Object[] state, String[] propertyNames, Type[] types) throws CallbackException {
inserts.add(entity);
return false ;
}
// delete
public void onDelete(Object entity, Serializable id, Object[] state, String[] propertyNames, Type[] types) throws CallbackException {
}
//flush() 之前调用
public void preFlush(Iterator entities) throws CallbackException {
}
// flush() 执行SQL语句之后调用
public void postFlush(Iterator entities) throws CallbackException {
try {
for (Iterator it = updates.iterator();it.hasNext();){
System.out.println( " update= " + it.next() );
}
for (Iterator it = inserts.iterator();it.hasNext();){
System.out.println( " insert " + it.next() );
}
} catch (Exception e) {
e.printStackTrace();
}
}
public Boolean isTransient(Object entity) {
// TODO Auto-generated method stub
return null ;
}
//决定Session中那些对象是脏数据 如果null Session使用默认处理脏数据
public int [] findDirty(Object entity, Serializable id, Object[] currentState, Object[] previousState, String[] propertyNames, Type[] types) {
return null ;
}
// 当Session构造实体类对象前调用
public Object instantiate(String entityName, EntityMode entityMode, Serializable id) throws CallbackException {
return null ;
}
public String getEntityName(Object object) throws CallbackException {
// TODO Auto-generated method stub
return null ;
}
public Object getEntity(String entityName, Serializable id) throws CallbackException {
// TODO Auto-generated method stub
return null ;
}
public void afterTransactionBegin(Transaction tx) {
// TODO Auto-generated method stub
}
public void beforeTransactionCompletion(Transaction tx) {
// TODO Auto-generated method stub
}
public void afterTransactionCompletion(Transaction tx) {
// TODO Auto-generated method stub
}
}
测试
import java.lang.reflect.Field;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import hbn.HibernateSessionFactory;
import hbn.bean.T2oo;
import junit.framework.TestCase;
public class TestIC extends TestCase {
private SessionFactory sessionFactory;
protected void setUp() throws Exception {
super .setUp();
// 利用java反射得到 HibernateSessionFactory ->
// private static org.hibernate.SessionFactory sessionFactory;
// 要模拟 并发 要 HibernateSessionFactory 得出的 有 threadLocal 不行
HibernateSessionFactory.currentSession();
HibernateSessionFactory.closeSession();
Field field = HibernateSessionFactory. class .getDeclaredField( " sessionFactory " );
field.setAccessible( true );
sessionFactory = (SessionFactory) field.get(HibernateSessionFactory. class );
}
public void testInc() throws Exception {
TestInterceptor intx = new TestInterceptor();
// 加载拦截器
Session session = sessionFactory.openSession(intx);
Transaction tr = session.beginTransaction();
T2oo t2 = new T2oo( 23 );
session.save(t2);
t2.setAvg( new Integer( 99 ));
tr.commit();
}
}
结果
Hibernate: insert into t2oo (version, avg, aid, id) values (?, ?, ?, ?)
Hibernate: update t2oo set version=?, avg=?, aid=? where id=? and version=?
//拦截到的
update=hbn.bean.T2oo@277
inserthbn.bean.T2oo@277