NullReferenceException on starting IceBox

tkrieger

Hi,

i tried to make an service with icebox but whenever i start the service i got an NullReferenceException. I have Ice-3.1.1 with .NET-2.0.

My icebox configuration looks like this:

IceBox.ServiceManager.Endpoints=tcp -p 12345
IceBox.Service.trustServer=TrustServer.dll:BISS.Security.TrustServer
trustServer.Endpoints=tcp -p 11002

My Service Implementation like this:

using System;

namespace BISS.Security
{
/// <summary>
/// Der Vertrauenserver dient zur Abfrage wichtiger
/// Sicherheitsinformationen und der eigentlichen Anmeldung am System.
/// </summary>
public class TrustServer : Ice.LocalObjectImpl, IceBox.Service
{

/// <summary>
/// Ice Endpunkt für den TrustServer
/// </summary>
private Ice.ObjectAdapter _adapter;

/// <summary>
/// Defaultkonstruktor
/// </summary>
private TrustServer()
{
}

#region Service Schnittstelle

/// <summary>
/// Startmethode des TrustServer IceBox-Dienstes
/// </summary>
/// <param name="name"></param>
/// <param name="communicator"></param>
/// <param name="args"></param>
public void start(string name, Ice.Communicator communicator, string[] args)
{
_adapter = communicator.createObjectAdapter(name);
_adapter.add(new BISS.Security.TrustServerIcer(),Ice.Util.stringToIdentity("trustServer"));
_adapter.activate();

}

/// <summary>
/// Stopmethode des TrustServer IceBox-Dienstes
/// </summary>
public void stop()
{
_adapter.deactivate();
}

#endregion

}
}

The TrustServerIcer is implemented in Security.dll which is located in the same directory. Whenever i now start my icebox i got following error:

\build\ms\TrustServer>c:\ice-3.1.1\bin\iceboxnet.exe --Ice.Confi
g=icebox.config
iceboxnet.exe: error: IceBox.FailureException: FailureException
reason = "ServiceManager: exception while starting service trustServer: Syst
em.NullReferenceException: Der Objektverweis wurde nicht auf eine Objektinstanz
festgelegt.
bei ServiceManagerI.startService(String service, String entryPoint, String[]
args) in f:\src\vc80\stage\IceCS-3.1.1\src\IceBox\ServiceManagerI.cs:Zeile 417."

bei ServiceManagerI.startService(String service, String entryPoint, String[]
args) in f:\src\vc80\stage\IceCS-3.1.1\src\IceBox\ServiceManagerI.cs:Zeile 430.
bei ServiceManagerI.load(String name, String value) in f:\src\vc80\stage\IceC
S-3.1.1\src\IceBox\ServiceManagerI.cs:Zeile 223.
bei ServiceManagerI.run() in f:\src\vc80\stage\IceCS-3.1.1\src\IceBox\Service
ManagerI.cs:Zeile 110.
Caused by: System.NullReferenceException: Der Objektverweis wurde nicht auf eine
Objektinstanz festgelegt.
bei ServiceManagerI.startService(String service, String entryPoint, String[]
args) in f:\src\vc80\stage\IceCS-3.1.1\src\IceBox\ServiceManagerI.cs:Zeile 417.

tkrieger

Found my mistake!

Hi,

for everything who propably had the same problem:

I delete the default constructor of the TrustServer. After this step everything works fine.

Greetings

Thomas

benoit

Hi,

Yes, that's the problem, your default constructor is private so the IceBox server can't instantiate your service. It should also work if you declare "public" the default constructor.

IceBox should print a better error message when it can't instantiate the service, we'll fix this for the next release! Thanks for bringing this to our attention .

Cheers,
Benoit.