qixinbo
54 lines
2.2 KiB
Python
54 lines
2.2 KiB
Python
from typing import Dict, Any, Optional
|
|
import json
|
|
import functools
|
|
from app.connectors.postgres import PostgresConnector
|
|
from app.connectors.clickhouse import ClickHouseConnector
|
|
from app.connectors.parquet import ParquetConnector
|
|
from app.models.datasource import DataSource
|
|
|
|
@functools.lru_cache(maxsize=32)
|
|
def _get_cached_connector(ds_type: str, config_json: str):
|
|
config = json.loads(config_json)
|
|
|
|
if ds_type in ["postgres", "postgresql", "supabase"]:
|
|
# Supabase is just postgres
|
|
db_url = config.get("connection_string") or \
|
|
f"postgresql://{config.get('user')}:{config.get('password')}@{config.get('host')}:{config.get('port', 5432)}/{config.get('database')}"
|
|
return PostgresConnector(db_url=db_url)
|
|
|
|
elif ds_type == "sqlite":
|
|
# SQLite uses connection string usually file path
|
|
db_url = config.get("connection_string")
|
|
if not db_url and config.get("file_path"):
|
|
db_url = f"sqlite:///{config.get('file_path')}"
|
|
return PostgresConnector(db_url=db_url)
|
|
|
|
elif ds_type == "clickhouse":
|
|
return ClickHouseConnector(
|
|
host=config.get("host"),
|
|
port=config.get("port", 9000),
|
|
user=config.get("user", "default"),
|
|
password=config.get("password", ""),
|
|
database=config.get("database", "default")
|
|
)
|
|
|
|
elif ds_type == "parquet":
|
|
return ParquetConnector(file_path=config.get("file_path"))
|
|
|
|
else:
|
|
raise ValueError(f"Unsupported data source type: {ds_type}")
|
|
|
|
def get_connector(datasource: DataSource):
|
|
# Use JSON string of config as cache key
|
|
# Ensure stable ordering of keys
|
|
config_str = json.dumps(datasource.config, sort_keys=True)
|
|
return _get_cached_connector(datasource.type.lower(), config_str)
|
|
|
|
def get_connector_from_config(ds_type: str, config: Dict[str, Any]):
|
|
# Helper for testing connection without saving to DB
|
|
# We can use the cached function too, or bypass if we want fresh check
|
|
# Usually for testing we want fresh check, so let's bypass cache or clear it if needed.
|
|
# But reusing cache is fine if config is same.
|
|
config_str = json.dumps(config, sort_keys=True)
|
|
return _get_cached_connector(ds_type.lower(), config_str)
|