public override IObservable <TSource> Process <TSource>(IObservable <TSource> source)
{
return(Observable.Defer(() =>
{
var engine = PythonEngine.Create();
var scope = engine.CreateScope();
engine.Execute(Script, scope);
object condition;
PythonProcessor <TSource, bool> processor;
if (PythonHelper.TryGetClass(scope, "Condition", out condition))
{
processor = new PythonProcessor <TSource, bool>(engine.Operations, condition);
}
else
{
processor = new PythonProcessor <TSource, bool>(scope);
}
if (processor.Load != null)
{
processor.Load();
}
var result = source.Where(processor.Process);
if (processor.Unload != null)
{
result = result.Finally(processor.Unload);
}
return result;
}));
}
public override IObservable <TSource> Process <TSource>(IObservable <TSource> source)
{
return(Observable.Defer(() =>
{
var scriptTask = new Task(() => { });
scriptTask.Start();
var engine = CreateEngine();
var scope = engine.CreateScope();
engine.Execute(Script, scope);
object sink;
PythonProcessor <TSource, object> processor;
if (PythonHelper.TryGetClass(scope, "Sink", out sink))
{
processor = new PythonProcessor <TSource, object>(engine.Operations, sink);
}
else
{
processor = new PythonProcessor <TSource, object>(scope);
}
if (processor.Load != null)
{
processor.Load();
}
return source.Do(input =>
{
scriptTask = scriptTask.ContinueWith(task =>
{
processor.Process(input);
});
}).Finally(() =>
{
var unloadAction = processor.Unload;
if (unloadAction != null)
{
scriptTask = scriptTask.ContinueWith(task => unloadAction());
}
engine.Runtime.IO.OutputWriter.Close();
scriptTask.Wait();
});
}));
}
static IObservable <TResult> Process <TSource, TResult>(
IObservable <TSource> source,
ObjectOperations op,
object processorClass)
{
return(Observable.Defer(() =>
{
var processor = new PythonProcessor <TSource, PythonGenerator>(op, processorClass);
var result = source.SelectMany(input => processor.Process(input).Cast <TResult>());
if (processor.Load != null)
{
processor.Load();
}
if (processor.Unload != null)
{
return result.Finally(processor.Unload);
}
else
{
return result;
}
}));
}
static IObservable <TResult> Process <TSource, TResult>(
IObservable <TSource> source,
ScriptScope scope)
{
var processor = new PythonProcessor <TSource, PythonGenerator>(scope);
var result = source.SelectMany(input => processor.Process(input).Cast <TResult>());
if (processor.Unload != null)
{
result = result.Finally(processor.Unload);
}
if (processor.Load != null)
{
var observable = result;
result = Observable.Defer(() =>
{
processor.Load();
return(observable);
});
}
return(result);
}
