C# – How to add event listener via Fluent NHibernate

cevent-listenerfluent-nhibernatenetnhibernate

I want to add an event listener (IPreUpdateEventListener) to add NHibernate but I can't seem to find an example when using a fluent configuration.

I want to be able to add the listener when I create the session factory, e.g. when the following code is execute.

_sessionFactory = Fluently.Configure()
    .Database(MsSqlConfiguration.MsSql2005.ConnectionString(connectionString).ShowSql())
    .Mappings(m => m.FluentMappings.AddFromAssemblyOf<IEntity>())
    .BuildSessionFactory();

Anyone know how to do this?

Best Answer

So, late response, but for the sake of posterity, to add listeners without removing existing registration listeners (like the earlier answer from Bengt Be will do):

var config = new Configuration ();
config.AppendListeners (ListenerType.PreUpdate, new [] { new AuditEventListener () });

etc.

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Obscure NHibernate/Fluent NHibernate error

I found that the inner exception gave more details. In my case I had to add the NHibernate.ByteCode.Castle.dll file to the references.

.net – Fluent NHibernate + multiple databases

I've implemented exactly this using (my own) Attribute on the Fluent mapping file to dictate which DB the entity belongs in. I've also got a concept of a 'default' database, and mapping files without an attribute are assumed to reside in the default DB (it may cut down on the number of classes you need to decorate). I then have initialisation code which creates a Session Factory per database, and for each, uses reflection to find all ClassMap classes,examines the attribute to determine which DB it belongs to, and registers each ClassMap accordingly.

A mapping file example:

  [FluentNHibernateDatabase("MySecurityDatabase")]
  public class SystemUserMap : ClassMap<SystemUser>
  {
    public SystemUserMap()
    {
      Id(x => x.SystemUserId);
      Map(x => x.LoginId);
      Map(x => x.LoginPassword);
      Map(x => x.UserFirstName);
      Map(x => x.UserSurname);
      References(x => x.UserOrganisation, "OrganisationId");
    }
  }

Obviously I've defined a list of the DBs that are referenced/used.
My implementation works so far as I've taken it, but I've hit a snag (that I hope someone can help out with):

I've asked my question here: How to identify a particular entity's Session Factory with Fluent NHibernate and Multiple Databases

Best Answer

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Obscure NHibernate/Fluent NHibernate error

.net – Fluent NHibernate + multiple databases

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