Interceptor Emptyinterceptor interface function in Hibernate

The Interceptor interface provides a mechanism for a session callback (callback) application (application) that allows the application to examine and/or modify its properties before persisting, updating, deleting, or loading the persisted object. One possible use is to track audit (auditing) information. For example: The following interceptor automatically sets the Createtimestamp property when an object that implements the Auditable interface is created and updates the Lastupdatetimestamp property synchronously when the object that implements the Auditable interface is updated.

You can implement the Interceptor interface directly, or you can (preferably) inherit from Emptyinterceptor.

 Packageorg.hibernate.test;Importjava.io.Serializable;Importjava.util.Date;ImportJava.util.Iterator;ImportOrg.hibernate.EmptyInterceptor;Importorg.hibernate.Transaction;ImportOrg.hibernate.type.Type; Public classAuditinterceptorextendsEmptyinterceptor {Private intupdates; Private intcreates; Private intloads;  Public voidOnDelete (Object entity, Serializable ID, object[] state, String[] PropertyNames, type[] types) {// do nothing    }     Public BooleanOnflushdirty (Object entity, Serializable ID, object[] C                                 Urrentstate, object[] previousstate, string[] propertynames, Type[] types) {if(EntityinstanceofAuditable) {Updates++;  for(inti=0; i < propertynames.length; i++ ) {                if("Lastupdatetimestamp". Equals (Propertynames[i])) {Currentstate[i]=NewDate (); return true; }            }        }        return false; }     Public BooleanonLoad (Object entity, Serializable ID, object[] state, String[] PropertyNames, type[] types) {if(EntityinstanceofAuditable) {Loads++; }        return false; }     Public BooleanOnSave (Object entity, Serializable ID, object[] state, String[] PropertyNames, type[] types) {if(EntityinstanceofAuditable) {Creates++;  for(inti=0; i<propertynames.length; i++ ) {                if("Createtimestamp". Equals (Propertynames[i])) {State[i]=NewDate (); return true; }            }        }        return false; }     Public voidaftertransactioncompletion (Transaction tx) {if(tx.wascommitted ()) {System.out.println ("Creations:" + creates + ", updates:" + Updates, "Loads:" +loads); } Updates=0; Creates=0; Loads=0; }}

Interceptors can have two types: within the session range, and within the Sessionfactory range.

When a session is opened with an overloaded sessionfactory.opensession () using interceptor as a parameter, the interceptor within the session range is specified.

New Auditinterceptor ());

Or in the configuration file, add:

<BeanID= "Sessionfactory"class= "Cn.sh.cares.framework.spring.annotationSessionFactoryBean">    < Propertyname= "DataSource"ref= "Ppcdatasource"/>    <!--<property name= "Lobhandler" ref= "Lobhandler"/> -    < Propertyname= "Annotatedclasseslocations">        <List>            <value>classpath*:</value>        </List>    </ Property>
    < Propertyname= "Hbmlocations">        <List>            <value>classpath*:</value>        </List>    </ Property>    < Propertyname= "Hibernateproperties">        <Props>            <propKey= "Hibernate.dialect">Cn.sh.cares.framework.dao.hibernate.OracleDialect</prop>            <propKey= "Hibernate.format_sql">True</prop>            <propKey= "Hibernate.show_sql">True</prop>            <propKey= "Hibernate.use_sql_comments">False</prop>            <propKey= "Hibernate.cache.provider_class">Org.hibernate.cache.EhCacheProvider</prop>            <propKey= "Hibernate.cache.use_query_cache">True</prop>            <propKey= "Hibernate.cache.use_second_level_cache">True</prop>            <propKey= "Hibernate.jdbc.batch_size">20</prop>            <propKey= "Hibernate.jdbc.fetch_size">20</prop>        </Props>    </ Property>    < Propertyname= "Entityinterceptor">        <BeanID= "Auditinterceptor"class= "Cn.sh.cares.framework.dao.hibernate.AuditInterceptor" />    </ Property>

This article transferred from: http://blog.csdn.net/pengchua/article/details/5013889

Interceptor Emptyinterceptor interface function in Hibernate