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synapse/stubs/sortedcontainers/sorteddict.pyi
Richard van der Hoff 13683a3a22
Extend StreamChangeCache to support multiple entities per stream ID (#7303)
First some background: StreamChangeCache is used to keep track of what "entities" have 
changed since a given stream ID. So for example, we might use it to keep track of when the last
to-device message for a given user was received [1], and hence whether we need to pull any to-device messages from the database on a sync [2].

Now, it turns out that StreamChangeCache didn't support more than one thing being changed at
a given stream_id (this was part of the problem with #7206). However, it's entirely valid to send
to-device messages to more than one user at a time.

As it turns out, this did in fact work, because *some* methods of StreamChangeCache coped
ok with having multiple things changing on the same stream ID, and it seems we never actually
use the methods which don't work on the stream change caches where we allow multiple
changes at the same stream ID. But that feels horribly fragile, hence: let's update
StreamChangeCache to properly support this, and add some typing and some more tests while
we're at it.

[1]: https://github.com/matrix-org/synapse/blob/release-v1.12.3/synapse/storage/data_stores/main/deviceinbox.py#L301
[2]: https://github.com/matrix-org/synapse/blob/release-v1.12.3/synapse/storage/data_stores/main/deviceinbox.py#L47-L51
2020-04-22 13:45:40 +01:00

124 lines
4.2 KiB
Python

# stub for SortedDict. This is a lightly edited copy of
# https://github.com/grantjenks/python-sortedcontainers/blob/eea42df1f7bad2792e8da77335ff888f04b9e5ae/sortedcontainers/sorteddict.pyi
# (from https://github.com/grantjenks/python-sortedcontainers/pull/107)
from typing import (
Any,
Callable,
Dict,
Hashable,
Iterator,
Iterable,
ItemsView,
KeysView,
List,
Mapping,
Optional,
Sequence,
Type,
TypeVar,
Tuple,
Union,
ValuesView,
overload,
)
_T = TypeVar("_T")
_S = TypeVar("_S")
_T_h = TypeVar("_T_h", bound=Hashable)
_KT = TypeVar("_KT", bound=Hashable) # Key type.
_VT = TypeVar("_VT") # Value type.
_KT_co = TypeVar("_KT_co", covariant=True, bound=Hashable)
_VT_co = TypeVar("_VT_co", covariant=True)
_SD = TypeVar("_SD", bound=SortedDict)
_Key = Callable[[_T], Any]
class SortedDict(Dict[_KT, _VT]):
@overload
def __init__(self, **kwargs: _VT) -> None: ...
@overload
def __init__(self, __map: Mapping[_KT, _VT], **kwargs: _VT) -> None: ...
@overload
def __init__(
self, __iterable: Iterable[Tuple[_KT, _VT]], **kwargs: _VT
) -> None: ...
@overload
def __init__(self, __key: _Key[_KT], **kwargs: _VT) -> None: ...
@overload
def __init__(
self, __key: _Key[_KT], __map: Mapping[_KT, _VT], **kwargs: _VT
) -> None: ...
@overload
def __init__(
self, __key: _Key[_KT], __iterable: Iterable[Tuple[_KT, _VT]], **kwargs: _VT
) -> None: ...
@property
def key(self) -> Optional[_Key[_KT]]: ...
@property
def iloc(self) -> SortedKeysView[_KT]: ...
def clear(self) -> None: ...
def __delitem__(self, key: _KT) -> None: ...
def __iter__(self) -> Iterator[_KT]: ...
def __reversed__(self) -> Iterator[_KT]: ...
def __setitem__(self, key: _KT, value: _VT) -> None: ...
def _setitem(self, key: _KT, value: _VT) -> None: ...
def copy(self: _SD) -> _SD: ...
def __copy__(self: _SD) -> _SD: ...
@classmethod
@overload
def fromkeys(cls, seq: Iterable[_T_h]) -> SortedDict[_T_h, None]: ...
@classmethod
@overload
def fromkeys(cls, seq: Iterable[_T_h], value: _S) -> SortedDict[_T_h, _S]: ...
def keys(self) -> SortedKeysView[_KT]: ...
def items(self) -> SortedItemsView[_KT, _VT]: ...
def values(self) -> SortedValuesView[_VT]: ...
@overload
def pop(self, key: _KT) -> _VT: ...
@overload
def pop(self, key: _KT, default: _T = ...) -> Union[_VT, _T]: ...
def popitem(self, index: int = ...) -> Tuple[_KT, _VT]: ...
def peekitem(self, index: int = ...) -> Tuple[_KT, _VT]: ...
def setdefault(self, key: _KT, default: Optional[_VT] = ...) -> _VT: ...
@overload
def update(self, __map: Mapping[_KT, _VT], **kwargs: _VT) -> None: ...
@overload
def update(self, __iterable: Iterable[Tuple[_KT, _VT]], **kwargs: _VT) -> None: ...
@overload
def update(self, **kwargs: _VT) -> None: ...
def __reduce__(
self,
) -> Tuple[
Type[SortedDict[_KT, _VT]], Tuple[Callable[[_KT], Any], List[Tuple[_KT, _VT]]],
]: ...
def __repr__(self) -> str: ...
def _check(self) -> None: ...
def islice(
self, start: Optional[int] = ..., stop: Optional[int] = ..., reverse=bool,
) -> Iterator[_KT]: ...
def bisect_left(self, value: _KT) -> int: ...
def bisect_right(self, value: _KT) -> int: ...
class SortedKeysView(KeysView[_KT_co], Sequence[_KT_co]):
@overload
def __getitem__(self, index: int) -> _KT_co: ...
@overload
def __getitem__(self, index: slice) -> List[_KT_co]: ...
def __delitem__(self, index: Union[int, slice]) -> None: ...
class SortedItemsView( # type: ignore
ItemsView[_KT_co, _VT_co], Sequence[Tuple[_KT_co, _VT_co]]
):
def __iter__(self) -> Iterator[Tuple[_KT_co, _VT_co]]: ...
@overload
def __getitem__(self, index: int) -> Tuple[_KT_co, _VT_co]: ...
@overload
def __getitem__(self, index: slice) -> List[Tuple[_KT_co, _VT_co]]: ...
def __delitem__(self, index: Union[int, slice]) -> None: ...
class SortedValuesView(ValuesView[_VT_co], Sequence[_VT_co]):
@overload
def __getitem__(self, index: int) -> _VT_co: ...
@overload
def __getitem__(self, index: slice) -> List[_VT_co]: ...
def __delitem__(self, index: Union[int, slice]) -> None: ...