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