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Infrastructure & Cross-Cutting Concerns Layer

The Infrastructure Layer provides foundational services and handles cross-cutting concerns that span multiple layers. These include configuration, security, validation, exception handling, and data mapping.

Location: src/main/java/com/smartsupplypro/inventory/ - config/ - Configuration classes - security/ - OAuth2 and authentication handlers - validation/ - Custom validators - exception/ - Exception handling and custom exceptions - mapper/ - Data mapping utilities

Quick Navigation

By Topic

• Configuration - Spring beans, properties, application settings
• Security - OAuth2, authentication, authorization
• Exception Handling - Global error mapping, error responses
• Validation - Custom validators, validation flow
• Data Mapping - Entity ↔︎ DTO transformation, MapStruct
• Best Practices - Industry standards, common patterns

By Role

• Developers → Start with Configuration to understand Spring setup
• Security Team → Review Security for authentication/authorization details
• QA/Testing → Check Validation and Exception Handling
• DevOps → Refer to Configuration for environment setup
• New Team Members → Begin with Best Practices for standards

Architecture Overview

The Infrastructure Layer supports all other layers by providing cross-cutting concerns:

┌─────────────────────────────────────────────────────────┐
│              Controller Layer (HTTP)                     │
├─────────────────────────────────────────────────────────┤
│              Service Layer (Business Logic)              │
├─────────────────────────────────────────────────────────┤
│            Repository Layer (Data Access)                │
├─────────────────────────────────────────────────────────┤
│          Domain Model Layer (Entities & DTOs)            │
├─────────────────────────────────────────────────────────┤
│  INFRASTRUCTURE LAYER (Cross-Cutting Concerns)          │
│  ┌──────────┬──────────┬──────────┬──────────┬────────┐ │
│  │Security  │Validation│Exception │Mapping   │Config  │ │
│  └──────────┴──────────┴──────────┴──────────┴────────┘ │
└─────────────────────────────────────────────────────────┘

Key Responsibilities

1. Configuration - Spring beans, environment-specific settings
2. Security - OAuth2, authentication filters, authorization checks
3. Exception Handling - Centralized error mapping to HTTP responses
4. Validation - Custom business rule validators
5. Data Mapping - DTO ↔︎ Entity transformation
6. Best Practices - Standards for infrastructure concerns

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