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121 lines
3.3 KiB
Python
121 lines
3.3 KiB
Python
"""Cache for queries and responses."""
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from abc import ABC, abstractmethod
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from typing import Any, Callable, Dict, Union
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from manifest.caches.serializers import ArraySerializer, Serializer
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from manifest.response import Response
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RESPONSE_CONSTRUCTORS = {
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"diffuser": {
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"generation_key": "choices",
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"logits_key": "token_logprobs",
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"item_key": "array",
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},
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"tomadiffuser": {
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"generation_key": "choices",
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"logits_key": "token_logprobs",
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"item_key": "array",
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},
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}
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CACHE_CONSTRUCTOR = {
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"diffuser": ArraySerializer,
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"tomadiffuser": ArraySerializer,
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}
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class Cache(ABC):
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"""A cache for request/response pairs."""
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def __init__(
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self,
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connection_str: str,
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client_name: str = "None",
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cache_args: Dict[str, Any] = {},
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):
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"""
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Initialize client.
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Args:
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connection_str: connection string.
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client_name: name of client.
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cache_args: arguments for cache.
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cache_args are passed to client as default parameters.
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For clients like OpenAI that do not require a connection,
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the connection_str can be None.
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Args:
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connection_str: connection string for client.
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cache_args: cache arguments.
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"""
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self.client_name = client_name
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self.connect(connection_str, cache_args)
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self.serializer = CACHE_CONSTRUCTOR.get(client_name, Serializer)()
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@abstractmethod
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def close(self) -> None:
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"""Close the client."""
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raise NotImplementedError()
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@abstractmethod
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def connect(self, connection_str: str, cache_args: Dict[str, Any]) -> None:
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"""
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Connect to client.
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Args:
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connection_str: connection string.
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"""
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raise NotImplementedError()
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@abstractmethod
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def get_key(self, key: str, table: str = "default") -> Union[str, None]:
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"""
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Get the key for a request.
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With return None if key is not in cache.
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Args:
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key: key for cache.
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table: table to get key in.
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"""
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raise NotImplementedError()
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@abstractmethod
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def set_key(self, key: str, value: str, table: str = "default") -> None:
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"""
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Set the value for the key.
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Will override old value.
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Args:
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key: key for cache.
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value: new value for key.
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table: table to set key in.
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"""
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raise NotImplementedError()
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@abstractmethod
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def commit(self) -> None:
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"""Commit any results."""
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raise NotImplementedError()
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def get(
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self, request: Dict, overwrite_cache: bool, compute: Callable[[], Dict]
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) -> Response:
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"""Get the result of request (by calling compute as needed)."""
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key = self.serializer.request_to_key(request)
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cached_response = self.get_key(key)
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if cached_response and not overwrite_cache:
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cached = True
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response = self.serializer.key_to_response(cached_response)
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else:
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# Type Response
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response = compute()
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self.set_key(key, self.serializer.response_to_key(response))
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cached = False
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return Response(
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response, cached, request, **RESPONSE_CONSTRUCTORS.get(self.client_name, {})
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)
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