DataService issue

Okay.. I know I'm new to LightSpeed and all but I'm having major issues finding DataService for WCF communications.

using System;
using System.ServiceModel;
using uts.library.dac;
using Mindscape.LightSpeed;
using Mindscape.LightSpeed.Logging;
using Mindscape.LightSpeed.ServiceModel;

namespace utsra
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Remote Access Service");
            LightSpeedContext.Default.Logger = new ConsoleLogger();
            new ServiceHost(typeof(DataService<Switch>)).Open();
            Console.WriteLine("Type [CR] to stop...");
            Console.ReadLine();
        }
    }
}

I'm getting: "The type of namespace 'DataService' could not be found. I have the following References added Mindscape.LightSpeed Mindscape.LightSpeedServiceModel

It appears it is because of the sample WCF application I'm looking at uses version 1.0.0.0 of the Mindscape.LightSpeed.ServiceModel.

Can we get an updated simple WCF sample that uses Lightspeed's DistributedUnitofWork method?

Have a look at the Film Festival sample which is one of the standard installed samples with LightSpeed. That sample uses a DistributedUnitOfWork for fetching its data.

Jeremy

Jeremy,

When running this in Mono(Mono JIT compiler version 2.10.8.1) I get the following.

Unhandled Exception: System.ArgumentException: Service behavior configuration '' was not found
  at System.ServiceModel.ServiceHostBase.AddServiceBehaviors (System.String configurationName, Boolean throwIfNotFound) [0x00000] in <filename unknown>:0 
  at System.ServiceModel.ServiceHostBase.ApplyServiceElement (System.ServiceModel.Configuration.ServiceElement service) [0x00000] in <filename unknown>:0 
  at System.ServiceModel.ServiceHostBase.LoadConfigurationSection (System.ServiceModel.Configuration.ServiceElement element) [0x00000] in <filename unknown>:0 
  at System.ServiceModel.ServiceHostBase.ApplyConfiguration () [0x00000] in <filename unknown>:0 
  at System.ServiceModel.ServiceHostBase.InitializeDescription (System.ServiceModel.UriSchemeKeyedCollection baseAddresses) [0x00000] in <filename unknown>:0 
  at System.ServiceModel.ServiceHost.InitializeDescription (System.Type serviceType, System.ServiceModel.UriSchemeKeyedCollection baseAddresses) [0x00000] in <filename unknown>:0 
  at System.ServiceModel.ServiceHost.InitializeDescription (System.Object serviceInstance, System.ServiceModel.UriSchemeKeyedCollection baseAddresses) [0x00000] in <filename unknown>:0 
  at System.ServiceModel.ServiceHost..ctor (System.Object serviceInstance, System.Uri[] baseAddresses) [0x00000] in <filename unknown>:0 
  at Mindscape.LightSpeed.Samples.FilmFestival.Service.Program.Main (System.String[] args) [0x00000] in <filename unknown>:0 
[ERROR] FATAL UNHANDLED EXCEPTION: System.ArgumentException: Service behavior configuration '' was not found
  at System.ServiceModel.ServiceHostBase.AddServiceBehaviors (System.String configurationName, Boolean throwIfNotFound) [0x00000] in <filename unknown>:0 
  at System.ServiceModel.ServiceHostBase.ApplyServiceElement (System.ServiceModel.Configuration.ServiceElement service) [0x00000] in <filename unknown>:0 
  at System.ServiceModel.ServiceHostBase.LoadConfigurationSection (System.ServiceModel.Configuration.ServiceElement element) [0x00000] in <filename unknown>:0 
  at System.ServiceModel.ServiceHostBase.ApplyConfiguration () [0x00000] in <filename unknown>:0 
  at System.ServiceModel.ServiceHostBase.InitializeDescription (System.ServiceModel.UriSchemeKeyedCollection baseAddresses) [0x00000] in <filename unknown>:0 
  at System.ServiceModel.ServiceHost.InitializeDescription (System.Type serviceType, System.ServiceModel.UriSchemeKeyedCollection baseAddresses) [0x00000] in <filename unknown>:0 
  at System.ServiceModel.ServiceHost.InitializeDescription (System.Object serviceInstance, System.ServiceModel.UriSchemeKeyedCollection baseAddresses) [0x00000] in <filename unknown>:0 
  at System.ServiceModel.ServiceHost..ctor (System.Object serviceInstance, System.Uri[] baseAddresses) [0x00000] in <filename unknown>:0 
  at Mindscape.LightSpeed.Samples.FilmFestival.Service.Program.Main (System.String[] args) [0x00000] in <filename unknown>:0 

Sounds like you are missing some configuration - what does the system.serviceModel section in your machine.config file look like?

Jeremy

Jeremy,

Here are the files that I copied over (directly from the solution)

FilmFestival.Model.dll
Mindscape.LightSpeed.dll
Mindscape.LightSpeed.Linq.dll
Mindscape.LightSpeed.ServiceModel.dll
Service.exe
Service.exe.config

Here is machine.config section you requested from my linux server

        <sectionGroup name="system.serviceModel" type="System.ServiceModel.Configuration.ServiceModelSectionGroup, System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
                <section name="behaviors" type="System.ServiceModel.Configuration.BehaviorsSection, System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
                <section name="bindings" type="System.ServiceModel.Configuration.BindingsSection, System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
                <section name="client" type="System.ServiceModel.Configuration.ClientSection, System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
                <section name="commonBehaviors" type="System.ServiceModel.Configuration.CommonBehaviorsSection, System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
                <section name="diagnostics" type="System.ServiceModel.Configuration.DiagnosticSection, System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
                <section name="extensions" type="System.ServiceModel.Configuration.ExtensionsSection, System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
                <section name="serviceHostingEnvironment" type="System.ServiceModel.Configuration.ServiceHostingEnvironmentSection, System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
                <section name="services" type="System.ServiceModel.Configuration.ServicesSection, System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
                <section name="standardEndpoints" type="System.ServiceModel.Configuration.StandardEndpointsSection, System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
                <section name="routing" type="System.ServiceModel.Routing.Configuration.RoutingSection, System.ServiceModel.Routing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
                <section name="protocolMapping" type="System.ServiceModel.Configuration.ProtocolMappingSection, System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
        </sectionGroup>

Thanks - what do you have defined in the system.serviceModel/behaviors section?

Jeremy

See attached files.

machine.config-4 = /etc/mono/4.0/machine.config machine.config-2 = /etc/mono/2.0/machine.config

Jeremy,

Is there another sample that uses Light Speeds distributed computing? I understand the Model and Service projects inside the Film Festival however I do not understand the Web or Showcase projects.

I'm looking for a simple winform app that accesses the http binding that Service exposes.

Thanks.

Yes there is also an example of this in the ATM sample which is a WPF application so this may be a bit more what you are looking for - have a look within the Teller project where this is being used. Also all the information about how to define and configure the DistributedUnitOfWork is detailed in the documentation here: http://www.mindscapehq.com/documentation/lightspeed/Building-Distributed-Applications-/Distributed-Entity-Programming.

Jeremy

For the original issue with the Film Festival (which you will likely hit with the ATM sample as well) it seems like this may be an issue with how the Mono implementation of ServiceHostBase is dealing with the service configurations.

You can see in the source for that file here: https://github.com/mono/mono/blob/master/mcs/class/System.ServiceModel/System.ServiceModel/ServiceHostBase.cs#L350 that they are only doing a null check when compiled for .NET 4 but has a IsNullOrEmpty check previously.

Clearly the configuration name is coming through as String.Empty when its not defined so thats the cause of the issue. So what you could try doing is adding a dummy behavior, e.g. Add the following into system.serviceModel in the Service's app.config file

<behaviors>
  <serviceBehaviors>
    <behavior name="Dummy">
    </behavior>
  </serviceBehaviors>
</behaviors>

And then update the service definition to:

<service name="Mindscape.LightSpeed.ServiceModel.DistributedUnitOfWorkService" behaviorConfiguration="Dummy">

That should then get around it looking for a non existant behavior definition :)

Jeremy