my hibernate Optimistic Locking configuration

my hibernate Optimistic Locking configuration

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 2.0//EN" " http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">
<hibernate-mapping>
<class name="com.jgao.forum.modelbean.Jgaoforum" schema="GAOFORUM" table="JGAOFORUM" dynamic-update="true" dynamic-insert="true" optimistic-lock="version">
<id column="FORUMID" name="forumid" type="java.lang.String">
<generator class="uuid.hex"/>
</id>
<version column="VERSION" name="version" type="java.lang.Long" />
<property column="NAME" length="255" name="name" type="java.lang.String"/>
<property column="DESCRIPTION" length="2000" name="description" type="java.lang.String"/>
<property column="MODIFIEDDATE" length="15" name="modifieddate" type="java.lang.String"/>
<property column="CREATIONDATE" length="15" name="creationdate" type="java.lang.String"/>
<property column="MODERATED" length="22" name="moderated" not-null="true" type="java.lang.Long"/>
</class>
</hibernate-mapping>