protected override async Task <Action <NativeActivityContext> > ExecuteAsync(NativeActivityContext context, CancellationToken cancellationToken)
{
string path = Path.Get(context);
string libraryPath = LibraryPath.Get(context);
if (!path.IsNullOrEmpty() && !Directory.Exists(path))
{
throw new DirectoryNotFoundException(string.Format(Resources.InvalidPathException, path));
}
cancellationToken.ThrowIfCancellationRequested();
_pythonEngine = EngineProvider.Get(Version, path, libraryPath, !Isolated, TargetPlatform, ShowConsole);
var workingFolder = WorkingFolder.Get(context);
if (!workingFolder.IsNullOrEmpty())
{
var dir = new DirectoryInfo(workingFolder);
if (!dir.Exists)
{
throw new DirectoryNotFoundException(Resources.WorkingFolderPathInvalid);
}
workingFolder = dir.FullName; //we need to pass an absolute path to the python host
}
var operationTimeout = OperationTimeout.Get(context);
if (operationTimeout == 0)
{
operationTimeout = 3600; //default to 1h for no values provided.
}
try
{
await _pythonEngine.Initialize(workingFolder, cancellationToken, operationTimeout);
}
catch (Exception e)
{
Trace.TraceError($"Error initializing Python engine: {e.ToString()}");
try
{
Cleanup();
}
catch (Exception) { }
if (Version != Version.Auto)
{
Version autodetected = Version.Auto;
EngineProvider.Autodetect(path, out autodetected);
if (autodetected != Version.Auto && autodetected != Version)
{
throw new InvalidOperationException(string.Format(Resources.InvalidVersionException, Version.ToFriendlyString(), autodetected.ToFriendlyString()));
}
}
throw new InvalidOperationException(Resources.PythonInitializeException, e);
}
cancellationToken.ThrowIfCancellationRequested();
return(ctx =>
{
ctx.ScheduleAction(Body, _pythonEngine, OnCompleted, OnFaulted);
});
}
