Service-Level Architecture

NDP Microservices Interaction

This diagram shows how the Egypt NDP microservices interact with each other and the infrastructure components.

Prescription Service Flow

Dispense Service Flow

Service Communication Patterns

1. Synchronous REST APIs

Used for:

• Real-time queries
• CRUD operations
• Registry lookups

2. Asynchronous Events (Kafka)

Used for:

• Audit logging
• Notifications
• Data replication
• Analytics

3. Caching Strategy (Redis)

Used for:

• Registry data
• Session management
• Rate limiting
• Temporary storage

Service Dependencies Matrix

Service	PostgreSQL	MySQL	MongoDB	Redis	Kafka	Consul	Vault
Prescription Service	✅	❌	❌	✅	✅	✅	✅
Dispense Service	✅	❌	❌	✅	✅	✅	✅
Patient Registry	✅	❌	❌	✅	❌	✅	✅
HPR Registry	✅	❌	❌	✅	❌	✅	✅
Pharmacy Registry	❌	✅	❌	✅	❌	✅	✅
Medicine Directory	❌	✅	❌	✅	❌	✅	✅
Audit Service	❌	❌	✅	❌	✅	✅	✅
Notification Service	❌	❌	❌	✅	✅	✅	✅

API Gateway Routing

Data Flow Architecture

Service Health & Resilience

Circuit Breaker Pattern

Health Check Architecture

Next Steps

• Network Architecture - Detailed network topology
• Gateway Stack - Deploy the API gateway
• Application Stack - Deploy NDP services