org.hibernate.HibernateException: save is not valid without active transaction

I am creating JSF application and using some hibernate stuff in it. All I want to do is to save the entity into the database but I keep getting this exception:

org.hibernate.HibernateException: save is not valid without active transaction

At first I was getting this exception:

org.hibernate.HibernateException: No CurrentSessionContext configured!

Then I found that I need to add this into my hibernate configuration:

<property name="hibernate.current_session_context_class">thread</property>

This solved this issue but now the above one appears. I am saving entity into database like this:

public void create(T entity) {    getSessionFactory().getCurrentSession().save(entity);}

My hibernate.cfg.xml file looks like this:

<hibernate-configuration>    <session-factory>        <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>        <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/online_tests_management</property>        <property name="hibernate.connection.username">root</property>        <property name="hibernate.connection.password">root</property>        <property name="hibernate.show_sql">true</property>        <property name="hibernate.hbm2ddl.auto">update</property>        <property name="hibernate.current_session_context_class">thread</property>        <mapping class="com.groupgti.onlinetests.management.db.Service"/>    </session-factory></hibernate-configuration>

I am using:

Hibernate-4.1.4.Final
JDK 1.6
Tomcat 6
JSF 2.0
PrimeFaces 3.3.1
MySql
Does someone know where might be the problem?

You have to call session.beginTransaction()

public void create(T entity) {   Session session=getSessionFactory().getCurrentSession();   Transaction trans=session.beginTransaction();   session.save(entity);   trans.commit();}