#Architecture Documentation

Technical architecture guides for Flash Turbo CMS.

#Core Architecture Guides

Multi-Tenant Architecture - START HERE

Complete system architecture covering:

• Multi-tenant design and isolation
• Data separation strategy
• Component architecture
• Security measures
• Scaling considerations
• Includes Mermaid diagrams

Data Flow Architecture

End-to-end data flow diagrams for:

• System overview
• Product lifecycle
• Order processing
• Search and filtering
• Inventory management
• Authentication and authorization
• Cache invalidation
• Real-time updates

Payment Integration

Complete payment system guide:

• Razorpay integration
• Payment flow (step-by-step)
• Collections schema
• Webhook processing
• Error handling and refunds
• Security measures
• Testing cards
• Performance optimization

Caching Strategy

Caching architecture and best practices:

• Cache layers (CDN, Redis, DB)
• Cache strategy by entity
• Invalidation strategies
• Cache warming
• Key naming convention
• Distributed caching
• Troubleshooting

#Quick Navigation

Need	Document
System overview	Multi-Tenant Architecture
Request flow	Data Flow Architecture
Payment system	Payment Integration
Performance	Caching Strategy
Legacy docs	docs/archive/ folder

#Key Diagrams Included

#System Architecture

Frontend Apps → Backend API → Database
  ↓
Multi-tenant isolation at every layer
Cache layer for performance
S3 storage for files

#Data Flow

Request → Tenant Resolution → Query Building → 
Execution → Result Filtering → Response

#Payment Processing

Customer Checkout → Razorpay Gateway → 
Bank Processing → Webhook → Order Creation

#Caching Layers

Browser → CDN → Redis → Database
Each layer adds latency vs freshness tradeoff

#Architecture Principles

1. Multi-Tenancy

• Complete data isolation between tenants
• Enforced at API, query, and cache levels
• Single database, multiple logical databases

2. Performance

• Multi-layer caching (CDN, Redis, In-Memory)
• Optimized queries with proper indexing
• Asynchronous processing where possible

3. Security

• HTTPS/TLS encryption
• Authentication on every request
• Authorization verified at endpoint level
• Sensitive data never cached

4. Scalability

• Stateless API servers
• Shared Redis for caching
• MongoDB sharding ready
• Horizontal scaling supported

5. Reliability

• Error handling and recovery
• Idempotent operations
• Webhook retry logic
• Transaction support where needed

#For Different Audiences

#For Developers

• Start with Multi-Tenant Architecture
• Review relevant flow in Data Flow Architecture
• Check Caching Strategy for optimization
• Reference Payment Integration for payment features

#For DevOps/Operations

• Multi-Tenant Architecture - deployment setup
• Caching Strategy - Redis management
• Payment Integration - Razorpay setup

#For Security Reviews

• Multi-Tenant Architecture - isolation
• Payment Integration - payment security
• Caching Strategy - no sensitive data caching

#For Performance Optimization

• Caching Strategy - primary focus
• Data Flow Architecture - query optimization
• Multi-Tenant Architecture - indexing

#System Requirements

#Technology Stack

• Frontend: Next.js 14+
• Backend: Payload CMS v3.60+
• Database: MongoDB 5.0+
• Cache: Redis 6.0+
• Storage: AWS S3
• CDN: AWS CloudFront
• Payments: Razorpay
• Deployment: Docker/Kubernetes

#Infrastructure

• Load balancer (for multiple instances)
• SSL certificates
• Monitoring and logging
• Backup storage

#Design Patterns Used

1. Multi-Tenancy Pattern

• Tenant identification from request
• Automatic tenant filtering in queries
• Tenant-scoped cache keys

2. Repository Pattern

• Database access through repositories
• Consistent query interface
• Testable data layer

3. Hook Pattern

• Pre/post hooks on collections
• Automatic field population
• Cache invalidation triggers

4. Event-Driven

• Emit events on data changes
• Webhook handlers for external systems
• Eventual consistency model

5. Cache-Aside Pattern

• Check cache first
• If miss, query database
• Populate cache with result
• Return to client

#Getting Started

#1. Understand the System

Read Multi-Tenant Architecture to understand overall design (15 min)

#2. Follow the Data

Study Data Flow Architecture to see how requests flow (20 min)

#3. Review Security

Check security measures in Payment Integration and Multi-Tenant Architecture (10 min)

#4. Plan Optimization

Reference Caching Strategy when optimizing (ongoing)

#Common Tasks

#"How do I add a new feature?"

1. Design data model (collections)
2. Add tenant isolation
3. Plan caching strategy
4. Reference Data Flow Architecture for API pattern
5. Implement with proper error handling

#"How do I optimize query performance?"

1. Check Caching Strategy
2. Add caching for repeated queries
3. Review indexes in MongoDB
4. Use projections to limit fields

#"How do I ensure data isolation?"

1. Review Multi-Tenant Architecture
2. Always filter by tenantId in queries
3. Test with multiple tenants
4. Never cache without tenant prefix

#"How do I handle payment failures?"

1. See Payment Integration - Error Handling section
2. Implement retry logic
3. Notify customer and admin
4. Log all payment attempts

#Related Documentation

• User Guides: docs/user/
• Developer Guides: docs/dev/
• Operations: docs/ops/
• Implementation Details: docs/implementation/
• AI Chat: docs/ai-chat/
• Legacy: docs/archive/

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Questions? Review the specific architecture guide for your area.

Last Updated: October 27, 2025 Version: 1.0 Status: ✅ Complete & Current