Hi,

I'd just like to know if when I close a session, do I need to empty the cache or is this going to be empty automaticaly. I need to work without cache because of the architecture of the application I use with different client speaking directly to database.

If my conf file is like the following, what about cache setting ?

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration
PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-2.0.dtd">

<hibernate-configuration>

<session-factory>

<property name="connection.datasource">shark_hibernate</property>
<property name="show_sql">true</property>
<property name="dialect">net.sf.hibernate.dialect.PostgreSQLDialect</property>
<property name="transaction.factory_class">net.sf.hibernate.transaction.JDBCTransactionFactory</property>

<!-- to be used just for test
<property name="connection.driver_class">org.postgresql.Driver</property>
<property name="dialect">net.sf.hibernate.dialect.PostgreSQLDialect</property>
<property name="connection.url">jdbc:postgresql://127.0.0.1:5432/shark</property>
<property name="connection.username">shark</property>
<property name="connection.password">shark</property>-->


<!-- Mapping files -->
<mapping resource="HibernateApplicationMapping.hbm.xml"/>

</session-factory>

</hibernate-configuration>

Thanks for help.

Read the documentation, chapter "Performance".

Ok,

I had already read it, but I'd like to be sure to make the right think. With the configuration I have if I want to be sure that no cache is going to be used, I have to call session.clear() before the session.close() (or the last one is sufficient)?

This is the first point about Session cache, about second level cache, with my configuration, do I also need to empty the second level cache to ensure that nothing will be cached?

Thanks.

Read it again. You don't have any second-level cache enabled (apparently) and you have to understand how the Session works before you think about its caching features. Short: The Session is the first level transaction-scoped cache and can't be turned off. The important thing here is "transaction scoped".

Thanks again for so quick response Christian.

In order to make sure, if I specify nothing more (no cache property) that what I have in the .cfg file and in the hbm I shoudn't have a second level cache enable, is this right?

Vlad

yes you're right

That is good, but I noticed that the jar ehcache is requiered and even hibernate does not seem to work (ask for this library) without it, so it is not logic?

Vlad

You can set the cache.provider to HashTableCacheProvider if you don't like the dependency. Hibernate just loads EHCache per default, even if you don't use the cache.

Ok thanks again fo the response.

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