Florian b272e069d4 Unified logging behaviour

- Logger doesn't start with log level DEBUG by default, instead reads a environment variable
- Added extensive debug logging
- Wrote a readme
- Changed database healthcheck loop to only catch pymsql errors

2025-10-17 10:58:37 +02:00

775 B

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Backend Push Notifications

Overview

This part of the backend handles device push notifications for registered users. It consumes messages from RabbitMQ, looks up user device tokens from a MySQL database, and sends notifications via Expo's API. Failed deliveries are retried or sent to a dead-letter queue.

Requirements

Python 3.12+
MySQL database
RabbitMQ
Python packages from requirements.txt

Configuration

Environment variables:

LOG_LEVEL (DEBUG, INFO, WARNING, ERROR, CRITICAL)
RABBITMQ_URL
MYSQL_HOST, MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE
API_ENDPOINT (Expo push API)

Metrics

Metrics are exposed on port 9000 for Prometheus, including:

MSG_PUBLISHED
MSG_FAILED
MSG_RETRY
Queue sizes