protected async override Task <Action <AsyncCodeActivityContext> > ExecuteAsync(AsyncCodeActivityContext context, CancellationToken cancellationToken)
{
IEngine pythonEngine = PythonScope.GetPythonEngine(context);
string scriptFile = ScriptFile.Get(context);
string scriptCode = Code.Get(context);
// safeguard checks
if (scriptFile.IsNullOrEmpty() && scriptCode.IsNullOrEmpty())
{
throw new InvalidOperationException(Resources.NoScriptSpecifiedException);
}
if (!scriptFile.IsNullOrEmpty() && !File.Exists(scriptFile))
{
throw new FileNotFoundException(Resources.ScriptFileNotFoundException, scriptFile);
}
// load script from file if not specified
if (scriptCode.IsNullOrEmpty())
{
scriptCode = File.ReadAllText(ScriptFile.Get(context));
}
PythonObject result = null;
try
{
result = await pythonEngine.LoadScript(scriptCode, cancellationToken);
}
catch (Exception e)
{
Trace.TraceError($"Error loading Python script: {e.ToString()}");
throw new InvalidOperationException(Resources.LoadScriptException, e);
}
return((asyncCodeActivityContext) =>
{
Result.Set(asyncCodeActivityContext, result);
});
}
protected async override Task <Action <AsyncCodeActivityContext> > ExecuteAsync(AsyncCodeActivityContext context, CancellationToken cancellationToken)
{
IEngine pythonEngine = PythonScope.GetPythonEngine(context);
string scriptFile = ScriptFile.Get(context);
string scriptCode = Code.Get(context);
//IEnumerable<object> parameters = Parameters.Get(context);
// safeguard checks
if (scriptFile.IsNullOrEmpty() && scriptCode.IsNullOrEmpty())
{
throw new InvalidOperationException(Resources.NoScriptSpecifiedException);
}
if (!scriptFile.IsNullOrEmpty() && !File.Exists(scriptFile))
{
throw new FileNotFoundException(Resources.ScriptFileNotFoundException, scriptFile);
}
// load script from file if not specified
if (scriptCode.IsNullOrEmpty())
{
scriptCode = File.ReadAllText(ScriptFile.Get(context));
}
try
{
await pythonEngine.Execute(scriptCode, cancellationToken);
}
catch (Exception e)
{
Trace.TraceError($"Error running Python script: {e}");
throw new InvalidOperationException(Resources.RunScriptException, e);
}
return((asyncCodeActivityContext) =>
{
});
}
protected override void Execute(CodeActivityContext context)
{
IEngine pythonEngine = PythonScope.GetPythonEngine(context);
PythonObject pyObject = PythonObject.Get(context);
if (null == pyObject)
{
throw new ArgumentNullException(nameof(PythonObject));
}
T result;
try
{
result = (T)pythonEngine.Convert(pyObject, typeof(T));
}
catch (Exception e)
{
Trace.TraceError($"Error casting Python object: {e}");
throw new InvalidOperationException(Resources.ConvertException, e);
}
Result.Set(context, result);
}
protected async override Task <Action <AsyncCodeActivityContext> > ExecuteAsync(AsyncCodeActivityContext context, CancellationToken cancellationToken)
{
IEngine pythonEngine = PythonScope.GetPythonEngine(context);
if (pythonEngine == null)
{
throw new InvalidOperationException(Resources.PythonEngineNotFoundException);
}
PythonObject pyObject = Instance.Get(context);
string methodName = Name.Get(context);
IEnumerable <object> parameters = Parameters.Get(context);
// safeguard checks
if (methodName.IsNullOrEmpty())
{
throw new InvalidOperationException(Resources.InvalidMethodNameException);
}
PythonObject result = null;
try
{
result = await pythonEngine.InvokeMethod(pyObject, methodName, parameters, cancellationToken);
}
catch (Exception e)
{
Trace.TraceError($"Error invoking Python function: {e.ToString()}");
throw new InvalidOperationException(Resources.InvokeException, e);
}
return(asyncCodeActivityContext =>
{
Result.Set(asyncCodeActivityContext, result);
});
}
