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template-fastapi/{{project_slug}}/dependencies/connection_manager_dep.py.jinja
Aleksei Sokol 53f14a8624
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Version 0.4.0
Changes:
- put ObservabilityMiddleware before ExceptionHandlerMiddleware to avoid repetative code
- add application startup and last metrics update metrics along with CPU usage metric and threads count
- move host and port to new uvicorn section at config along with new reload and forwarded_allow_ips
- add request_id and remove trace_id/span_id generation if tracing is disabled
- move logging logic from utils to observability
- pass trace_id/span_id in HEX form
2026-01-03 16:29:58 +03:00

35 lines
1.5 KiB
Django/Jinja

"""PostgresConnectionManager dependency functions are defined here."""
from fastapi import FastAPI, Request
from {{project_slug}}.db.connection.manager import PostgresConnectionManager
def init_dispencer(app: FastAPI, connection_manager: PostgresConnectionManager) -> None:
"""Initialize PostgresConnectionManager dispencer at app's state."""
if hasattr(app.state, "postgres_connection_manager_dep"):
if not isinstance(app.state.postgres_connection_manager_dep, PostgresConnectionManager):
raise ValueError(
"postgres_connection_manager_dep attribute of app's state is already set"
f"with other value ({app.state.postgres_connection_manager_dep})"
)
return
app.state.postgres_connection_manager_dep = connection_manager
def from_app(app: FastAPI) -> PostgresConnectionManager:
"""Get a connection_manager from app state."""
if not hasattr(app.state, "postgres_connection_manager_dep"):
raise ValueError("PostgresConnectionManager dispencer was not initialized at app preparation")
return app.state.postgres_connection_manager_dep
async def from_request(request: Request) -> PostgresConnectionManager:
"""Get a PostgresConnectionManager from request or app state."""
if hasattr(request.state, "postgres_connection_manager_dep"):
connection_manager = request.state.postgres_connection_manager_dep
if isinstance(connection_manager, PostgresConnectionManager):
return connection_manager
return from_app(request.app)