I guess you're stuck with implementing a skeleton class in C# that you then monkey patch (don't know the term for Python) to give the implementation in python
2009/2/16 Jan R <[email protected]> > Hi, > > I try to implement WCF services with a IronPython script. I try to > implement the services for ICalculator in the WCF get started sample > tutorial, see attachments below and > http://msdn.microsoft.com/da-dk/library/ms751519(en-us).aspx<http://msdn.microsoft.com/da-dk/library/ms751519%28en-us%29.aspx> > . > > Unfortunately I get the follwing Exception "InvalidOperationException" with > the message: > > "In order to use one of the ServiceHost constructors that takes a service > instance, the InstanceContextMode of the service must be set to > InstanceContextMode.Single. This can be configured via the > ServiceBehaviorAttribute. Otherwise, please consider using the ServiceHost > constructors that take a Type argument." > > How do I set the appriated InstanceContextMode of the python class > implemeting the services. > > Please help me out! > > > Regards > Jan Rouvillain > > Attachments. > > Program.cs: > > > using System; > > using System.Collections.Generic; > > using System.Linq; > > using System.Text; > > using System.ServiceModel; > > using System.ServiceModel.Description; > > using IronPython; > > using IronPython.Hosting; > > using Microsoft.Scripting; > > using Microsoft.Scripting.Hosting; > > namespace Microsoft.ServiceModel.Samples > > { > > class Program > > { > > static void Main(string[] args) > > { > > Uri baseAddress = new > Uri("http://localhost:8000/ServiceModelSamples/Service";); > > // Se up python implmentation > > PythonRunner pyr = new PythonRunner(); > > pyr.loadscript(@"..\..\..\Calculator\Calculator.py"); > > > pyr.run(); > > ICalculator pyCalc = (ICalculator)pyr.getInstance("PyCalculator"); > > ServiceHost selfHost = new ServiceHost( (object) pyCalc, baseAddress); > > try > > { > > // Step 3 of the hosting procedure: Add a service endpoint. > > selfHost.AddServiceEndpoint( > > typeof(ICalculator), > > new WSHttpBinding(), > > "CalculatorService"); > > // Step 4 of the hosting procedure: Enable metadata exchange. > > ServiceMetadataBehavior smb = new ServiceMetadataBehavior(); > > smb.HttpGetEnabled = true; > > selfHost.Description.Behaviors.Add(smb); > > // Step 5 of the hosting procedure: Start (and then stop) the service. > > > selfHost.Open(); > > Console.WriteLine("The service is ready."); > > Console.WriteLine("Press <ENTER> to terminate service."); > > Console.WriteLine(); > > Console.ReadLine(); > > // Close the ServiceHostBase to shutdown the service. > > > selfHost.Close(); > > } > > catch (CommunicationException ce) > > { > > Console.WriteLine("An exception occurred: {0}", ce.Message); > > selfHost.Abort(); > > } > > } > > } > > public class PythonRunner > > { > > Dictionary<String, Object> options; > > private ScriptEngine engine; > > private ScriptScope scope; > > private CompiledCode code; > > public PythonRunner() > > { > > InitializePythonEngine(); > > } > > public void InitializePythonEngine() > > { > > options = new Dictionary<string, object>(); > > options["DivisionOptions"] = PythonDivisionOptions.New; > > engine = Python.CreateEngine(options); > > } > > public void loadscript(string scriptPath) > > { > > ScriptSource script = engine.CreateScriptSourceFromFile(scriptPath); > > > code = script.Compile(); > > scope = engine.CreateScope(); > > } > > public void SetVariable(string name, object value) > > { > > scope.SetVariable( name, value); > > } > > public void run() > > { > > try > > { > > code.Execute(scope); > > } > > catch (Exception exc) > > { > > Console.WriteLine("Python exception: " + exc.ToString()); > > } > > } > > public Object getInstance(string className) > > { > > ObjectOperations ops = engine.Operations; > > object obj = scope.GetVariable(className); > > return (Object) ops.Call(obj); > > } > > } > > } > > > > > > > > CalaculatorService.cs: > > > > using System; > > using System.Collections.Generic; > > using System.Linq; > > using System.Text; > > using System.ServiceModel; > > namespace Microsoft.ServiceModel.Samples > > { > > [ServiceContract(Namespace = "http://Microsoft.ServiceModel.Samples";)] > > public interface ICalculator > > { > > // Step7: Create the method declaration for the contract. > > [OperationContract] > > double Add(double n1, double n2); > > > > [OperationContract] > > double Subtract(double n1, double n2); > > > > [OperationContract] > > double Multiply(double n1, double n2); > > > > [OperationContract] > > double Divide(double n1, double n2); > > } > > } > > > > Calculator.py > > > > import clr > > clr.AddReference('PlatformService') > > from Microsoft.ServiceModel.Samples import ICalculator > > > > class PyCalculator(ICalculator): > > "Implements calculator services" > > > > def Add(self, a, b): > > print 'a ' + a + ' + b ' + b > > return a+b > > def Subtract(self, a, b): > > print 'a ' + a + ' - b ' + b > > return a-b > > def Multiply(self, a, b): > > print 'a ' + a + ' * b ' + b > > return a*b > > > > def Divide(self, a, b): > > print 'a ' + a + ' // b ' + b > > return a/b > > > > > > > _______________________________________________ > Users mailing list > [email protected] > http://lists.ironpython.com/listinfo.cgi/users-ironpython.com > >
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