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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| import asyncio | ||
| import inspect | ||
| import functools | ||
| from fsspec.asyn import AsyncFileSystem | ||
|
|
||
|
|
||
| def async_wrapper(func, obj=None): | ||
| """ | ||
| Wraps a synchronous function to make it awaitable. | ||
| Parameters | ||
| ---------- | ||
| func : callable | ||
| The synchronous function to wrap. | ||
| obj : object, optional | ||
| The instance to bind the function to, if applicable. | ||
| Returns | ||
| ------- | ||
| coroutine | ||
| An awaitable version of the function. | ||
| """ | ||
|
|
||
| @functools.wraps(func) | ||
| async def wrapper(*args, **kwargs): | ||
| return await asyncio.to_thread(func, *args, **kwargs) | ||
|
|
||
| return wrapper | ||
|
|
||
|
|
||
| class AsyncFileSystemWrapper(AsyncFileSystem): | ||
| """ | ||
| A wrapper class to convert a synchronous filesystem into an asynchronous one. | ||
| This class takes an existing synchronous filesystem implementation and wraps all | ||
| its methods to provide an asynchronous interface. | ||
| Parameters | ||
| ---------- | ||
| sync_fs : AbstractFileSystem | ||
| The synchronous filesystem instance to wrap. | ||
| """ | ||
|
|
||
| def __init__(self, sync_fs, *args, **kwargs): | ||
| super().__init__(*args, **kwargs) | ||
| self.asynchronous = True | ||
| self.fs = sync_fs | ||
| self._wrap_all_sync_methods() | ||
|
|
||
| @property | ||
| def fsid(self): | ||
| return f"async_{self.fs.fsid}" | ||
|
|
||
| def _wrap_all_sync_methods(self): | ||
| """ | ||
| Wrap all synchronous methods of the underlying filesystem with asynchronous versions. | ||
| """ | ||
| for method_name in dir(self.fs): | ||
| if method_name.startswith("_"): | ||
| continue | ||
|
|
||
| attr = inspect.getattr_static(self.fs, method_name) | ||
| if isinstance(attr, property): | ||
| continue | ||
|
|
||
| method = getattr(self.fs, method_name) | ||
| if callable(method) and not asyncio.iscoroutinefunction(method): | ||
| async_method = async_wrapper(method, obj=self) | ||
| setattr(self, f"_{method_name}", async_method) | ||
|
|
||
| @classmethod | ||
| def wrap_class(cls, sync_fs_class): | ||
| """ | ||
| Create a new class that can be used to instantiate an AsyncFileSystemWrapper | ||
| with lazy instantiation of the underlying synchronous filesystem. | ||
| Parameters | ||
| ---------- | ||
| sync_fs_class : type | ||
| The class of the synchronous filesystem to wrap. | ||
| Returns | ||
| ------- | ||
| type | ||
| A new class that wraps the provided synchronous filesystem class. | ||
| """ | ||
|
|
||
| class GeneratedAsyncFileSystemWrapper(cls): | ||
| def __init__(self, *args, **kwargs): | ||
| sync_fs = sync_fs_class(*args, **kwargs) | ||
| super().__init__(sync_fs) | ||
|
|
||
| GeneratedAsyncFileSystemWrapper.__name__ = ( | ||
| f"Async{sync_fs_class.__name__}Wrapper" | ||
| ) | ||
| return GeneratedAsyncFileSystemWrapper |
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