Scott.Idem/OSIT-AE-API-FastAPI
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Refactor: Relocate bootstrap and validation logic into lifespan context manager

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Scott Idem
2026-01-15 17:10:42 -05:00
parent 3f276a42e1
commit 5ece1d34e3
1 changed files with 36 additions and 26 deletions
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62
app/main.py
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@@ -1,4 +1,4 @@
import datetime, json, os, pytz, random, secrets # , uvicorn
import datetime, json, os, pytz, random, secrets, contextlib # , uvicorn
from enum import Enum
#from datetime import datetime, time, timedelta
@@ -34,6 +34,40 @@ log = logging.getLogger(__name__)
#format='[%(asctime)s] %(levelname)s @ %(module)s.%(funcName)s()#%(lineno)d: %(message)s'
#)
@contextlib.asynccontextmanager
async def lifespan(app: FastAPI):
"""
Handles application startup and shutdown lifecycle.
"""
log.setLevel(logging.INFO)
log.info('### **** *** ** * Aether API v4 using FastAPI - Startup Lifespan Initiated * ** *** **** ###')
# 1. Bootstrapping Configuration from DB with robust error handling
log.info("Bootstrapping Configuration...")
try:
if bootstrap_db_config(config.settings):
log.info("Successfully bootstrapped configuration from database.")
# Re-initialize the database engine with new credentials/URI
if reconnect_db():
log.info("Database connection re-established with production configuration.")
else:
log.warning("FAILED to re-establish database connection after bootstrap. Falling back to .env settings.")
else:
log.warning("System bootstrap from DB returned no results. Using environment defaults.")
except Exception as e:
log.error(f"Unexpected error during configuration bootstrap: {e}. Falling back to .env settings.")
# 2. Final validation of critical infrastructure
validate_critical_config(config.settings)
log.info('### **** *** ** * Aether API v4 using FastAPI - Startup Sequence Complete * ** *** **** ###')
yield
# Shutdown logic
log.info('### **** *** ** * Aether API v4 using FastAPI - Shutdown Lifespan Initiated * ** *** **** ###')
log.info('The Aether FastAPI API is shutting down...')
print('### **** *** ** * Aether API v4 using FastAPI - About to try FastAPI() while loading... * ** *** **** ###')
app = FastAPI(
@@ -42,34 +76,10 @@ app = FastAPI(
description = 'One Sky IT\'s Aether API v4 using FastAPI.',
version = '4.9.0',
operationsSorter = 'method',
lifespan = lifespan,
)
log.setLevel(logging.INFO)
# log.debug(config.settings)
print('### **** *** ** * Aether API v4 using FastAPI - Bootstrapping Configuration... * ** *** **** ###')
# Sync settings from DB with robust error handling
try:
if bootstrap_db_config(config.settings):
log.info("Successfully bootstrapped configuration from database.")
# Re-initialize the database engine with new credentials/URI
if reconnect_db():
log.info("Database connection re-established with production configuration.")
else:
log.warning("FAILED to re-establish database connection after bootstrap. Falling back to .env settings.")
else:
log.warning("System bootstrap from DB returned no results. Using environment defaults.")
except Exception as e:
log.error(f"Unexpected error during configuration bootstrap: {e}. Falling back to .env settings.")
# Perform final validation of critical infrastructure
validate_critical_config(config.settings)
print('### **** *** ** * Aether API v4 using FastAPI - Finished Configuration Phase * ** *** **** ###' )
log.debug(config.settings)
# @lru_cache()
# def get_settings():
# return config.Settings()