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NHibernate.Caches.MemCache web.config for cache expiration time

I am migrating to Nhibernate 2.0 GA but am having some problems setting the cache expiration in the memcached provider.

I see in the sources NHibernate.Caches.MemCache that there is a property to expire and a default for 300 seconds.

There are also properties for cache areas, but the config section handler doesn't seem to display them.

Is there a different cache expiration time set that is not provider specific -

Here is a functional web config section (no expiration settings).

<memcache>
    <memcached host="127.0.0.1" port="11211"/>
    <!-- or multiples -->
</memcache>

<hibernate-configuration xmlns="urn:nhibernate-configuration-2.2">
    <session-factory>
        <property name="show_sql">true</property>
        <property name="connection.provider" >NHibernate.Connection.DriverConnectionProvider</property>
        <property name="dialect">NHibernate.Dialect.MsSql2000Dialect</property>
        <property name="connection.driver_class">NHibernate.Driver.SqlClientDriver</property>
                <!--    <property name="hibernate.cache.provider_class" value="NHibernate.Caches.MemCache.MemCacheProvider,NHibernate.Caches.MemCache" /> -->
        <property name="connection.connection_string">Data Source=stage2.ripple6.com;Initial Catalog=r6stage;User Id=sa;Password=mworld7650;Application Name=Hibernate;</property>
        <property name="connection.isolation">ReadCommitted</property>
        <property name="cache.use_second_level_cache">true</property>
        <property name="cache.provider_class">NHibernate.Caches.MemCache.MemCacheProvider,NHibernate.Caches.MemCache</property>
        <property name="default_schema" >r6stage.dbo</property>
    </session-factory>

</hibernate-configuration>
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3 answers


Use expiration date.

<property name="expiration" >YOUR_INTERVAL_IN_SECONDS</property>


After that, when you start the application with logging, you can see:

NHibernate.Caches.MemCache.MemCacheClient: 20:57:55,762 DEBUG MemCacheClient:0 - using expiration of YOUR_INTERVAL_IN_SECONDS seconds
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Use default_expiration.

<property name="default_expiration" >YOUR_INTERVAL_IN_SECONDS</property>


I saw in the source that the default expiration value is set to 300 seconds. But you can override this value by setting the default_expiration property in the NHibernate config file.

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As I understand it, the cache expiration time is provider specific as some cache providers do not support this. It also means that you don't have a situation where 60 means hour in some cases and minute in others.

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