Using NHibernate Session Per Request with WCF Windsor Integration
time to read 1 min | 141 words

Okay, this is a quickie, but here is how you can do it, you need to register a UnitOfWorkEndPointBehavior implementation on the container, and make sure that your WCF services are used through the WindsorServiceHost. That is all. What is the UnitOfWorkEndPointBehavior, you ask, here it is:

public class UnitOfworkEndPointBehavior : IEndpointBehavior
{
	public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
	{
		foreach (DispatchOperation operation in endpointDispatcher.DispatchRuntime.Operations)
		{
			operation.CallContextInitializers.Add(new UnitOfWorkCallContextInitializer());
		}
	}
}

public class UnitOfWorkCallContextInitializer : ICallContextInitializer
{
	public object BeforeInvoke(InstanceContext instanceContext, IClientChannel channel, Message message)
	{
		ISession session = factory.OpenSession();
		OperationContext.Items["NHibernate_Session"] = session;
		return session;
	}

	public void AfterInvoke(object correlationState)
	{
		((IDisposable)correlationState).Dispose();
	}
}

public static class UnitOfWork
{
	public static ISession Current { get { return (ISession )OperationContext.Items["NHibernate_Session"]; }
}
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