Contents

Chapter 1

Features

This chapter covers the core features and capabilities of Notification System.

Features

  • Multi-channel delivery — Email, webhook, in-app, and SMS (via pluggable adapters)
  • Template engine — Reusable notification templates with variable interpolation
  • Scheduling — Send immediately or schedule for a future time
  • User preferences — Per-user channel opt-in/opt-out with global defaults
  • Delivery tracking — Track sent, delivered, failed, and pending status per notification
  • Retry logic — Automatic retries with exponential backoff for failed deliveries
  • Batch sending — Send one notification to many recipients efficiently
  • Priority levels — Critical, high, normal, low — with priority-based queue ordering
  • Digest mode — Aggregate low-priority notifications into periodic digests
  • Audit trail — Full history of every notification sent, to whom, and delivery result

Requirements

  • Python 3.10+
  • No external dependencies (stdlib only)
Chapter 2

Quick Start

Follow this guide to get Notification System up and running in your environment.

Quick Start

bash
python src/main.py --init-demo
bash
# Send a notification
curl -X POST http://localhost:8008/api/notifications \
  -H "Content-Type: application/json" \
  -d '{"recipient_id": "user_1", "channel": "email", "template": "welcome", "variables": {"name": "Alice"}}'

# Send to multiple recipients
curl -X POST http://localhost:8008/api/notifications/batch \
  -H "Content-Type: application/json" \
  -d '{"recipient_ids": ["user_1", "user_2"], "channel": "in_app", "template": "announcement", "variables": {"message": "New feature launched!"}}'

# List notifications for a user
curl http://localhost:8008/api/notifications/user_1

# Check delivery status
curl http://localhost:8008/api/notifications/status/notif_abc123

# Manage templates
curl http://localhost:8008/api/templates

# Update user preferences
curl -X PUT http://localhost:8008/api/preferences/user_1 \
  -H "Content-Type: application/json" \
  -d '{"email": true, "sms": false, "in_app": true, "webhook": false}'

# Process pending scheduled notifications
curl -X POST http://localhost:8008/api/notifications/process-queue

API Endpoints

MethodPathDescription
POST/api/notificationsSend a notification
POST/api/notifications/batchSend to multiple recipients
GET/api/notifications/:user_idList user's notifications
GET/api/notifications/status/:idCheck delivery status
POST/api/notifications/process-queueProcess scheduled/retry queue
GET/api/templatesList all templates
POST/api/templatesCreate a template
GET/api/preferences/:user_idGet user preferences
PUT/api/preferences/:user_idUpdate user preferences
Chapter 3
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