Real-Time Cryptocurrency Monitoring System
Production-ready data streaming pipeline for real-time cryptocurrency exchange rate monitoring using Apache Kafka and Cassandra
System Architecture
Alpha Vantage API
Real-time crypto data source
Apache Kafka
Message streaming platform
Apache Cassandra
Distributed NoSQL database
Ingest
API Consumer fetches real-time exchange rates for BTC, ETH, XRP against USD/EUR every 30 minutes
Stream
Kafka producer streams formatted cryptocurrency data to topic for real-time processing
Store
Kafka consumer processes messages and inserts structured data into Cassandra for persistence
Technical Implementation
API Consumer Logic
# Scheduled Data Fetching
scheduler = BlockingScheduler()
scheduler.add_job(fetch_and_send_data,
"interval", minutes=30)
# Kafka Producer
producer = KafkaProducer(
bootstrap_servers="localhost:9092",
value_serializer=lambda v:
json.dumps(v).encode('utf-8')
)Multi-Currency Support
Tracks BTC, ETH, XRP against USD and EUR simultaneously
Real-time Streaming
Automated 30-minute intervals with APScheduler
Consumer & Storage
# Kafka Consumer
consumer = KafkaConsumer(
"crypto_prices",
auto_offset_reset="earliest",
value_deserializer=lambda x:
json.loads(x.decode("utf-8"))
)
# Cassandra Insert
INSERT INTO crypto_prices VALUES
(%s, %s, %s, %s, %s, %s)Message Processing
Continuous listening and processing of Kafka messages
Persistent Storage
Structured data storage with bid/ask prices and timestamps
Data Schema & Structure
Cassandra Table: crypto_prices
System Features & Capabilities
Real-Time Streaming
30-minute intervals with continuous data flow
AWS Deployment
Production-ready EC2 instance with 24/7 uptime
Secure Architecture
Environment variables and secure API key management
Scalable Design
Modular architecture ready for horizontal scaling
Deployment & Technology Stack
Production Environment
Ubuntu server with 24/7 availability
Background processes for continuous operation
Technology Components
Future Enhancements & Roadmap
Visualization Dashboard
Grafana or Streamlit dashboard for real-time monitoring and analytics
Enhanced Scalability
Managed services upgrade and horizontal scaling capabilities
Advanced Monitoring
Comprehensive logging, error handling, and system health monitoring