215 lines
5.5 KiB
Markdown
215 lines
5.5 KiB
Markdown
# Architecture Overview - Monolithic Application
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This document describes the monolithic architecture, providing clear understanding of the application structure, module organization, and system design.
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## 1. Project Structure
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```
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[Project Root]/
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├── src/ # Source code
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│ ├── api/ # API layer (controllers, routes)
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│ ├── services/ # Business logic layer
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│ ├── models/ # Data models
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│ ├── repositories/ # Data access layer
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│ ├── middleware/ # Request processing middleware
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│ ├── utils/ # Utility functions
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│ └── config/ # Configuration files
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├── tests/ # Test suites
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│ ├── unit/
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│ ├── integration/
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│ └── e2e/
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├── migrations/ # Database migrations
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├── public/ # Static assets (if serving frontend)
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├── docs/ # Documentation
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└── scripts/ # Build and deployment scripts
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```
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## 2. High-Level System Diagram
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```
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[User/Client]
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v
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[Load Balancer] (optional)
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v
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[Application Server]
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+-- [API Layer]
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+-- [Service Layer]
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+-- [Data Access Layer]
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+-- [Database]
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+-- [Cache] (optional)
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+-- [External Services]
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```
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## 3. Core Components
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### 3.1. Application Server
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**Name:** [e.g., Main Application, Web Server]
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**Description:** Single unified application handling all business logic
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**Technologies:** [e.g., Node.js/Express, Python/Django, Java/Spring Boot, .NET]
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**Deployment:** [e.g., AWS EC2, Heroku, Docker container]
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### 3.2. Layered Architecture
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#### 3.2.1. API/Controller Layer
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**Description:** Handles HTTP requests, routing, and response formatting
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**Key Modules:** [List main controllers/route groups]
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**Responsibilities:** Request validation, authentication, response serialization
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#### 3.2.2. Service/Business Logic Layer
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**Description:** Core business logic and workflows
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**Key Modules:** [List main service classes/modules]
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**Responsibilities:** Business rules, transaction management, orchestration
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#### 3.2.3. Data Access Layer
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**Description:** Database interactions and data persistence
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**Key Modules:** [List repositories/DAO classes]
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**Responsibilities:** CRUD operations, query building, ORM management
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### 3.3. Frontend (if integrated)
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**Name:** [e.g., Web UI, Admin Panel]
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**Description:** User interface served by the monolith
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**Technologies:** [e.g., Server-side rendered with Jinja/EJS, or SPA with React/Vue]
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**Location:** [public/ or templates/ directory]
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## 4. Data Stores
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### 4.1. Primary Database
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**Name:** [e.g., Main Application Database]
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**Type:** [PostgreSQL, MySQL, MongoDB, etc.]
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**Purpose:** Stores all application data
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**Key Schemas/Collections:**
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- users
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- [entity names]
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- [domain tables]
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### 4.2. Cache (if used)
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**Name:** [e.g., Redis Cache]
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**Type:** Redis, Memcached
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**Purpose:** Performance optimization, session storage
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**Cached Data:** [What gets cached]
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## 5. External Integrations / APIs
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**Service Name:** [e.g., Payment Processor, Email Service]
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**Purpose:** [Functionality]
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**Integration Method:** [REST API, SDK, Webhook]
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**Integration Location:** [Which service/module handles it]
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## 6. Deployment & Infrastructure
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**Cloud Provider:** [AWS, GCP, Azure, On-premise]
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**Hosting:** [EC2, App Engine, Virtual Machine, Container]
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**Database Hosting:** [RDS, Cloud SQL, Managed service]
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**CI/CD Pipeline:** [GitHub Actions, Jenkins, GitLab CI]
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**Load Balancing:** [ALB, nginx, Cloud Load Balancer]
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**Monitoring & Logging:** [CloudWatch, Application Insights, ELK]
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**Scaling Strategy:** [Vertical scaling, horizontal with load balancer]
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## 7. Security Considerations
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**Authentication:** [Session-based, JWT, OAuth2]
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**Authorization:** [RBAC implementation, middleware]
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**Data Encryption:** [TLS/HTTPS, database encryption]
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**Security Practices:**
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- Input validation and sanitization
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- SQL injection prevention (ORM/parameterized queries)
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- CSRF protection
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- Rate limiting
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- Security headers
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**Secrets Management:** [Environment variables, vault, cloud secrets]
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## 8. Development & Testing Environment
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**Local Setup Instructions:** [Steps to run locally]
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**Development Database:** [Docker, local instance]
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**Testing Frameworks:**
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- Unit: [e.g., Jest, Pytest, JUnit]
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- Integration: [e.g., Supertest, TestContainers]
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- E2E: [e.g., Cypress, Selenium]
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**Code Quality Tools:** [ESLint, Prettier, SonarQube]
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**Development Workflow:** [Git workflow, branch strategy]
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## 9. Future Considerations / Roadmap
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- [e.g., Consider extracting high-traffic modules into separate services]
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- [e.g., Implement caching layer for better performance]
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- [e.g., Add background job processing with queue]
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- [e.g., Evaluate migration to microservices if scaling demands increase]
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## 10. Project Identification
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**Project Name:** [Application Name]
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**Repository URL:** [Git repository]
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**Primary Contact/Team:** [Development team]
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**Date of Last Update:** [YYYY-MM-DD]
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**Application Version:** [Current version]
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## 11. Glossary / Acronyms
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**Monolith:** Single-tiered application where all components are tightly coupled
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**ORM:** Object-Relational Mapping - translates between database and objects
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**Repository Pattern:** Data access abstraction layer
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**Service Layer:** Business logic layer between controllers and data access
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**[Add application-specific terms]**
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