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app.py
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app.py
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# Copyright 2021 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import signal
import sys
from types import FrameType
from flask import Flask
from utils.logging import logger
app = Flask(__name__)
@app.route("/")
def hello() -> str:
# Use basic logging with custom fields
logger.info(logField="custom-entry", arbitraryField="custom-entry")
# https://cloud.google.com/run/docs/logging#correlate-logs
logger.info("Child logger with trace Id.")
return "Hello, World! 2"
def shutdown_handler(signal_int: int, frame: FrameType) -> None:
logger.info(f"Caught Signal {signal.strsignal(signal_int)}")
from utils.logging import flush
flush()
# Safely exit program
sys.exit(0)
if __name__ == "__main__":
# Running application locally, outside of a Google Cloud Environment
# handles Ctrl-C termination
signal.signal(signal.SIGINT, shutdown_handler)
app.run(host="localhost", port=8080, debug=True)
else:
# handles Cloud Run container termination
signal.signal(signal.SIGTERM, shutdown_handler)