Using DevForce with windows service
Printed From: IdeaBlade
Category: DevForce
Forum Name: DevForce 2012
Forum Discription: For .NET 4.5
URL: http://www.ideablade.com/forum/forum_posts.asp?TID=4602
Printed Date: 03-Apr-2025 at 3:49pm
Topic: Using DevForce with windows service
Posted By: amarpai
Subject: Using DevForce with windows service
Date Posted: 16-Nov-2013 at 12:13pm
We're evaluating DevForce/Cocktail and have found it works great with WCF. Our application has a number of windows services and we've been unable to get it to work.
Does DevForce work with Windows Services? I could not find any examples in the documentation. Here is the sample code. All the MEF instantiations work correctly. However, the application hangs when trying to retrieve from the database. I have tried various things:
- Invoking the myService.ProcessRequests using a TaskFactory.StartNew
- Invoking the ProcessRequests from a Timer.Elapsed event
In all cases, the application hangs at the DB call. What do I do to fix this?
Thanks!
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internal static class Program
{
private static void Main()
{
var myService = new MyService();
#if DEBUG
myService.ProcessRequests();
#else
var servicesToRun = new ServiceBase[] { myService };
ServiceBase.Run(servicesToRun);
#endif
}
}
public partial class MyService : ServiceBase
{
// Windows service boiler-plate code removed
protected override void OnStart(string[] args)
{
ProcessRequests();
}
public void ProcessRequests()
{
// _processor is correctly instantiated
_processor = new MefInstanceProvider<MyProcessor>().GetInstance();
_processor.ProcessRequests();
}
}
internal class MyProcessor : IDisposable
{
// LoginManager is successfully set through MEF using constructor
public async Task<string> ProcessRequests()
{
await _loginManager.LoginAsync(new LoginCredential("Admin", "password", null));
}
}
public class LoginManager : IEntityLoginManager
{
// EM is successfully set through MEF using constructor
public virtual IPrincipal Login(ILoginCredential credential)
{
var em = new SecurityEntities(entityManager);
User user = em.Users.Include(u => u.Contacts)
.FirstOrDefault(x => x.Username.ToUpper()
.Equals(credential.UserName.ToUpper()));
// Execution stops at the above line
}
}
}
------------------------------------------------------------------------
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Replies:
Posted By: kimj
Date Posted: 16-Nov-2013 at 6:29pm
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It's likely that the Windows account running the service doesn't have permissions to the database. The debuglog generated by DevForce, and possibly the Event Viewer, should have more information on the exact error.
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