Event-Driven Architecture Demo
Serverless order processing with Azure Functions and Storage Queues. Production-ready implementation with Infrastructure as Code, automatic scaling, and comprehensive monitoring.
Solution Architecture
High-level architecture showing three contexts: Client/Trigger, Azure PaaS Resources, and Infrastructure. Click to enlarge.
Key Achievements
Cost Efficiency
90% cost reduction vs traditional VM hosting through serverless consumption model
Auto-Scaling
Scales from 0 to 200 instances automatically based on queue depth
Built-in Resilience
Automatic retry logic with exponential backoff and poison message handling
Full Observability
End-to-end distributed tracing with Application Insights integration
Technology Stack
Core Technologies:
- Azure Functions - Serverless compute with HTTP and Queue triggers
- Storage Queues - Reliable, cost-effective message delivery
- .NET 8 - Modern C# with isolated worker model
- Bicep - Infrastructure as Code for repeatable deployments
- Application Insights - Comprehensive monitoring and diagnostics
This implementation demonstrates several enterprise patterns:
- Event-Driven Architecture - Decoupled components communicating via messages
- Queue-Based Load Leveling - Smooth traffic spikes through asynchronous processing
- Retry Pattern - Automatic handling of transient failures
- Circuit Breaker - Prevent cascading failures in distributed systems
- Correlation IDs - End-to-end request tracking across services
Why Storage Queues over Service Bus?
- Simple FIFO ordering sufficient for order processing
- Significantly lower cost for demo/POC scenarios
- No base infrastructure charges (pay per transaction only)
- 500TB capacity handles enterprise volumes
Service Bus would be preferred for scenarios requiring guaranteed ordering, duplicate detection, or complex routing patterns.
Implementation Highlights
Infrastructure as Code Benefits:
- Complete infrastructure defined in version-controlled Bicep templates
- Parameterized deployments for multiple environments
- System Managed Identity eliminates credential management
- One-command deployment of entire solution
Production-Ready Features:
- Comprehensive error handling and structured logging
- Async/await patterns throughout for optimal performance
- Dependency injection for testability
- Health checks and readiness probes
- Custom metrics for business event tracking
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