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"""Base classes for database providers."""
import logging
from abc import ABC, abstractmethod
from typing import Any, Optional, Sequence, cast
from uuid import UUID
from pydantic import BaseModel
from core.base.abstractions import (
GraphCreationSettings,
GraphEnrichmentSettings,
GraphSearchSettings,
)
from .base import Provider, ProviderConfig
logger = logging.getLogger()
class DatabaseConnectionManager(ABC):
@abstractmethod
def execute_query(
self,
query: str,
params: Optional[dict[str, Any] | Sequence[Any]] = None,
isolation_level: Optional[str] = None,
):
pass
@abstractmethod
async def execute_many(self, query, params=None, batch_size=1000):
pass
@abstractmethod
def fetch_query(
self,
query: str,
params: Optional[dict[str, Any] | Sequence[Any]] = None,
):
pass
@abstractmethod
def fetchrow_query(
self,
query: str,
params: Optional[dict[str, Any] | Sequence[Any]] = None,
):
pass
@abstractmethod
async def initialize(self, pool: Any):
pass
class Handler(ABC):
def __init__(
self,
project_name: str,
connection_manager: DatabaseConnectionManager,
):
self.project_name = project_name
self.connection_manager = connection_manager
def _get_table_name(self, base_name: str) -> str:
return f"{self.project_name}.{base_name}"
@abstractmethod
def create_tables(self):
pass
class PostgresConfigurationSettings(BaseModel):
"""Configuration settings with defaults defined by the PGVector docker
image.
These settings are helpful in managing the connections to the database. To
tune these settings for a specific deployment, see
https://pgtune.leopard.in.ua/
"""
checkpoint_completion_target: Optional[float] = 0.9
default_statistics_target: Optional[int] = 100
effective_io_concurrency: Optional[int] = 1
effective_cache_size: Optional[int] = 524288
huge_pages: Optional[str] = "try"
maintenance_work_mem: Optional[int] = 65536
max_connections: Optional[int] = 256
max_parallel_workers_per_gather: Optional[int] = 2
max_parallel_workers: Optional[int] = 8
max_parallel_maintenance_workers: Optional[int] = 2
max_wal_size: Optional[int] = 1024
max_worker_processes: Optional[int] = 8
min_wal_size: Optional[int] = 80
shared_buffers: Optional[int] = 16384
statement_cache_size: Optional[int] = 100
random_page_cost: Optional[float] = 4
wal_buffers: Optional[int] = 512
work_mem: Optional[int] = 4096
class LimitSettings(BaseModel):
global_per_min: Optional[int] = None
route_per_min: Optional[int] = None
monthly_limit: Optional[int] = None
def merge_with_defaults(
self, defaults: "LimitSettings"
) -> "LimitSettings":
return LimitSettings(
global_per_min=self.global_per_min or defaults.global_per_min,
route_per_min=self.route_per_min or defaults.route_per_min,
monthly_limit=self.monthly_limit or defaults.monthly_limit,
)
class DatabaseConfig(ProviderConfig):
"""A base database configuration class."""
provider: str = "postgres"
user: Optional[str] = None
password: Optional[str] = None
host: Optional[str] = None
port: Optional[int] = None
db_name: Optional[str] = None
project_name: Optional[str] = None
postgres_configuration_settings: Optional[
PostgresConfigurationSettings
] = None
default_collection_name: str = "Default"
default_collection_description: str = "Your default collection."
collection_summary_system_prompt: str = "system"
collection_summary_prompt: str = "collection_summary"
enable_fts: bool = False
# Graph settings
batch_size: Optional[int] = 1
graph_search_results_store_path: Optional[str] = None
graph_enrichment_settings: GraphEnrichmentSettings = (
GraphEnrichmentSettings()
)
graph_creation_settings: GraphCreationSettings = GraphCreationSettings()
graph_search_settings: GraphSearchSettings = GraphSearchSettings()
# Rate limits
limits: LimitSettings = LimitSettings(
global_per_min=60, route_per_min=20, monthly_limit=10000
)
route_limits: dict[str, LimitSettings] = {}
user_limits: dict[UUID, LimitSettings] = {}
def validate_config(self) -> None:
if self.provider not in self.supported_providers:
raise ValueError(f"Provider '{self.provider}' is not supported.")
@property
def supported_providers(self) -> list[str]:
return ["postgres"]
@classmethod
def from_dict(cls, data: dict[str, Any]) -> "DatabaseConfig":
instance = cls.create(**data)
instance = cast(DatabaseConfig, instance)
limits_data = data.get("limits", {})
default_limits = LimitSettings(
global_per_min=limits_data.get("global_per_min", 60),
route_per_min=limits_data.get("route_per_min", 20),
monthly_limit=limits_data.get("monthly_limit", 10000),
)
instance.limits = default_limits
route_limits_data = limits_data.get("routes", {})
for route_str, route_cfg in route_limits_data.items():
instance.route_limits[route_str] = LimitSettings(**route_cfg)
return instance
class DatabaseProvider(Provider):
connection_manager: DatabaseConnectionManager
config: DatabaseConfig
project_name: str
def __init__(self, config: DatabaseConfig):
logger.info(f"Initializing DatabaseProvider with config {config}.")
super().__init__(config)
@abstractmethod
async def __aenter__(self):
pass
@abstractmethod
async def __aexit__(self, exc_type, exc, tb):
pass
|
