Comprehensive development guidelines for React + Java projects

This directory contains all development guidelines, standards, and best practices for React + Java full-stack development. These guidelines ensure consistent, maintainable, and high-quality code across the entire project.

• Coding Standards - Comprehensive coding standards for React, TypeScript, and Java
• API Design Guidelines - RESTful API design principles and patterns
• Database Design Patterns - JPA/Hibernate best practices and patterns
• Testing Standards - Testing strategies for frontend and backend
• Security Implementation Standards - Security best practices
• Performance Optimization Guidelines - Performance best practices
• Troubleshooting Guide - Common issues and solutions

1. Consistency: Follow established patterns and conventions
2. Readability: Write code that is easy to understand and maintain
3. Testability: Design code that is easy to test
4. Performance: Consider performance implications in design decisions
5. Security: Implement security best practices from the start
6. Documentation: Document complex logic and architectural decisions

1. Separation of Concerns: Clear separation between frontend, backend, and data layers
2. Single Responsibility: Each class/component should have one reason to change
3. Dependency Injection: Use dependency injection for loose coupling
4. API-First Design: Design APIs before implementing frontend components
5. Database-First: Design database schema before implementing business logic
6. Test-Driven Development: Write tests before or alongside implementation

src/
├── main/
│   ├── java/
│   │   └── com/company/project/
│   │       ├── controller/          # REST API controllers
│   │       ├── service/             # Business logic services
│   │       ├── repository/          # Data access layer
│   │       ├── entity/              # JPA entities
│   │       ├── dto/                 # Data Transfer Objects
│   │       ├── config/              # Configuration classes
│   │       ├── exception/           # Custom exceptions
│   │       ├── security/            # Security configuration
│   │       └── util/                # Utility classes
│   └── resources/
│       ├── application.properties   # Application configuration
│       ├── application-dev.properties
│       ├── application-prod.properties
│       └── db/migration/            # Database migration scripts
└── test/
    └── java/
        └── com/company/project/
            ├── controller/          # Controller tests
            ├── service/             # Service tests
            ├── repository/          # Repository tests
            └── integration/         # Integration tests

src/
├── components/                      # Reusable React components
│   ├── common/                      # Common/shared components
│   ├── forms/                       # Form components
│   └── layout/                      # Layout components
├── pages/                           # Page components
├── services/                        # API service layer
├── hooks/                           # Custom React hooks
├── utils/                           # Utility functions
├── types/                           # TypeScript type definitions
├── store/                           # State management (Redux/Context)
├── styles/                          # CSS/SCSS files
├── assets/                          # Static assets
└── __tests__/                       # Test files
    ├── components/                  # Component tests
    ├── services/                    # Service tests
    └── integration/                 # Integration tests

1. Planning Phase

   • Create feature documentation using templates
   • Design API endpoints and database schema
   • Create implementation plan

2. Backend Development

   • Create/modify JPA entities
   • Implement repository interfaces
   • Implement service layer with business logic
   • Create REST controllers
   • Write unit and integration tests

3. Frontend Development

   • Create/modify TypeScript types
   • Implement API service layer
   • Create React components
   • Implement state management
   • Write component and integration tests

4. Integration & Testing

   • Test frontend-backend integration
   • Run end-to-end tests
   • Perform manual testing
   • Code review and approval

5. Deployment

   • Deploy to staging environment
   • Perform smoke testing
   • Deploy to production
   • Monitor and validate

1. Issue Investigation

   • Reproduce the issue
   • Identify root cause
   • Document findings

2. Fix Implementation

   • Implement fix following coding standards
   • Write tests to prevent regression
   • Test fix thoroughly

3. Review & Deployment

   • Code review and approval
   • Deploy to staging for validation
   • Deploy to production
   • Monitor for any issues

• Unit Tests: Test individual methods and classes
• Integration Tests: Test API endpoints and database operations
• Repository Tests: Test data access layer
• Service Tests: Test business logic

• Component Tests: Test individual React components
• Integration Tests: Test component interactions and API calls
• E2E Tests: Test complete user workflows
• Visual Tests: Test UI appearance and responsiveness

• Backend: Minimum 80% code coverage
• Frontend: Minimum 75% code coverage
• Critical Paths: 100% coverage for critical business logic

• Authentication: Implement JWT-based authentication
• Authorization: Use role-based access control
• Input Validation: Validate all input data
• SQL Injection Prevention: Use parameterized queries
• CORS Configuration: Configure CORS properly

• XSS Prevention: Sanitize user input
• CSRF Protection: Implement CSRF tokens
• Secure Storage: Use secure storage for sensitive data
• HTTPS: Always use HTTPS in production
• Content Security Policy: Implement CSP headers

• Database Optimization: Use proper indexing and query optimization
• Caching: Implement caching for frequently accessed data
• Connection Pooling: Configure database connection pooling
• Lazy Loading: Use lazy loading for entity relationships
• Pagination: Implement pagination for large datasets

• Code Splitting: Split code into smaller bundles
• Lazy Loading: Lazy load components and routes
• Memoization: Use React.memo and useMemo for optimization
• Image Optimization: Optimize images and use appropriate formats
• Bundle Analysis: Regularly analyze bundle size

• Functionality: Code works as intended
• Standards Compliance: Follows coding standards
• Test Coverage: Adequate test coverage
• Performance: No performance regressions
• Security: No security vulnerabilities
• Documentation: Code is properly documented

• Code Coverage: Minimum thresholds met
• Linting: No linting errors
• Type Safety: No TypeScript errors
• Security Scan: No critical vulnerabilities
• Performance: Response times within acceptable limits

• IDE: IntelliJ IDEA (Java), VS Code (React)
• Version Control: Git with conventional commits
• Build Tools: Maven/Gradle (Java), npm/yarn (React)
• Testing: JUnit (Java), Jest/React Testing Library (React)
• Code Quality: SonarQube, ESLint, Prettier

• Build: Automated build on every commit
• Test: Run all tests automatically
• Quality Gates: Code quality checks
• Security Scan: Automated security scanning
• Deployment: Automated deployment to staging/production

• Spring Boot Documentation
• JPA/Hibernate Guide
• Spring Security Reference

• React Documentation
• TypeScript Handbook
• React Testing Library

• Clean Code Principles
• SOLID Principles
• REST API Design

• Check the Troubleshooting Guide for common problems
• Review existing documentation and code examples
• Search project issues and discussions

1. Self-Service: Check documentation and troubleshooting guide
2. Team Discussion: Discuss with team members
3. Technical Lead: Escalate to technical lead for complex issues
4. Architecture Review: Schedule architecture review for major decisions

📝 Guidelines Version: 1.0
🎯 Project Type: React + Java
📅 Last Updated: June 2025
🚀 Status: Production Ready