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problem with nhibernate file configuration.

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Falken224

Post subject: problem with nhibernate file configuration.

Posted: Fri Jan 06, 2006 1:38 pm

Newbie

Joined: Thu Jan 05, 2006 3:59 pm
Posts: 10

I've been using NHibernate for a while. When I configure programmatically, everything's fine. Here's my code:

Code:

                cfg.Properties.Add("hibernate.connection.provider", "NHibernate.Connection.DriverConnectionProvider");
                cfg.Properties.Add("hibernate.dialect", "NHibernate.Dialect.MsSql2000Dialect");
                cfg.Properties.Add("hibernate.connection.driver_class", "NHibernate.Driver.SqlClientDriver");
                cfg.Properties.Add("hibernate.connection.connection_string", getConnectionString(key));
                cfg.AddAssembly("MyAssembly");
                factoryList[key] = cfg.BuildSessionFactory();

Now, I've moved that configuration into a file, as seen below:

Code:

<?xml version='1.0' encoding='utf-8'?>
<hibernate-configuration xmlns="urn:nhibernate-configuration-2.0">

  <session-factory>
    <property name="hibernate.connection.provider">NHibernate.Connection.DriverConnectionProvider</property>
    <property name="hibernate.dialect">NHibernate.Dialect.MsSql2000Dialect</property>
    <property name="hibernate.connection.driver_class">NHibernate.Driver.SqlClientDriver</property>
    <property name="hibernate.connection.connection_string">**HA!  Like I'm gonna post my connection string to a public forum! :-p**</property>

    <mapping assembly="MyAssembly"/>
  </session-factory>

</hibernate-configuration>

When I run this, I get a . . . I forget the .NET equivalent of java's NullPointerException. When I take the mapping line out it works fine . . . except, of course, I don't have any mappings loaded. Any ideas, 'cause I'm stumped.

For reference, here's the stack trace I get when I call cfg.Configure(myXmlTextReader):

Code:

-      [System.NullReferenceException]   "Object reference not set to an instance of an object."
   at NHibernate.Cfg.Configuration.Configure(XmlTextReader reader)
   at MyAssembly.Hibernate.HibernateSessionFactory.ConfigureSessionFactory(String key) in C:\\Inetpub\\wwwroot\\personal\\Shared_Libraries\\LIB\\MyAssembly\\HibernateCore.cs:line 267
   at MyAssembly.Hibernate.HibernateSessionFactory.PrepareUnitOfWork(HibernateUnitOfWork unit) in C:\\Inetpub\\wwwroot\\personal\\Shared_Libraries\\LIB\\MyAssembly\\HibernateCore.cs:line 189

Thanks in advance

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sergey

Post subject:

Posted: Sat Jan 07, 2006 7:34 pm

Contributor

Joined: Wed May 11, 2005 4:59 pm
Posts: 1766
Location: Prague, Czech Republic

Which version of NHibernate are you using? I remember seeing a stack trace similar to this when the xmlns attribute was left out, but this doesn't look like your problem. Please post the version number and debug-level logs.

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k-dub

Post subject:

Posted: Sun Jan 08, 2006 1:32 pm

Contributor

Joined: Thu May 12, 2005 8:45 am
Posts: 226

Are you still calling:

Code:

cfg.AddAssembly("MyAssembly");

before building the SessionFactory? If it works when progamatically doing the configuration, I assume the mappings are loaded from the assembly properly. If not, the common problem of not setting the mapping files as "EmbeddedResource" in the project would be the likely issue.

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Falken224

Post subject:

Posted: Wed Jan 11, 2006 1:49 pm

Newbie

Joined: Thu Jan 05, 2006 3:59 pm
Posts: 10

Well, I got it working by just manually calling cfg.AddAssembly after loading the config file . . . sans the <mapping> element. Obviously not an elegant solution.

As for your question, sergey, about the version, I'm using NHibernate 1.0.1.

<side-note type="off-topic"><![CDATA[

I am waiting eagerly for 1.1 alpha with that nice happy sub-query functionality I see pending there on JIRA. :-D For that matter, 2.0 would be great, with the full Hibernate 3.1 functionality and support for generics. (you should see the hacks I've gone through to get that working here in the meantime . . . UGLY!) Anything I can do to help (short of time, money or actual design advice . . . so basically limited to moral support) let me know.

]]></side-note> 

Unfortunately, at this point, I haven't gotten log4net working quite properly, as this isn't yet ina real-world app, and I'm not sure how to get NUnit to set log4net up. (and I haven't been terribly motivated yet to do so.) So, I don't have the debug logging output at the moment.

I appreciate the attention, and I'll get you the debug output as soon as possible, though it might be a day or two.

Thanks.

-Falken

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sergey

Post subject:

Posted: Wed Jan 11, 2006 3:48 pm

Contributor

Joined: Wed May 11, 2005 4:59 pm
Posts: 1766
Location: Prague, Czech Republic

Falken224 wrote:

I'm not sure how to get NUnit to set log4net up.

In NHibernate tests we use assembly-level log4net.Config.XmlConfigurator attribute, like this:

Code:

[assembly: log4net.Config.XmlConfigurator()]

This makes log4net read settings from the app.config file.

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