[GitHub] [thrift] jorgecarleitao commented on pull request #2426: THRIFT-5446: Added code-gen for rust async read.

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jorgecarleitao commented on pull request #2426:
URL: https://github.com/apache/thrift/pull/2426#issuecomment-890551249


   Thanks!
   
   > A couple of high-level thoughts from skimming through the code. I wonder if there's a better way of generalizing the functions than adding an is_sync flag everywhere and repeating the is_sync block in multiple places to add the async prefix and use .await?. There are a couple of places where we now call a function with multiple boolean args, and without keyword args it can get confusing.
   
   I have no strong opinions here: the approach here just avoids code duplication by branching of with the `is_sync`. I personally have no problem with these arguments, but happy to change it to whatever makes sense to you.
   
   > Finally, I've never used async-trait. Do you know if the Thrift generator requires any features that are not supported by it?
   
   `async-trait` is just a macro to enable traits with `async`. We have been using it in Apache Arrow (e.g. [here](https://github.com/apache/arrow-datafusion/blob/master/datafusion/src/physical_plan/hash_aggregate.rs#L194)) to declare a trait that is `async`. `integer-encoding`, which we depend on, also uses it when compiled with `futures_async`. The declarations do not need this, only the lib declaring and implementing the trait.
   
   > Next, I would like to see a rough cut of how TInputStreamProtocol is implemented, just to see how everything fits together.
   
   I agree. I have been working on it today. I just pushed a draft to this. Still not compiling, but it gives a general idea; it is just mundane code of the equivalent `async` of the `TCompactInputProtocol`.
   
   
   


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