evolutionary-architecture/evolutionary-architecture-by-example
Evolutionary Architecture By Example
This project serves as a comprehensive educational resource for implementing modular monoliths and microservices within .NET environments. It focuses on applying domain-driven design principles to manage complex business logic, providing a structured approach to building systems that can evolve alongside changing requirements.
The architecture is defined by its emphasis on modularity and clear boundaries, utilizing vertical slices and bounded contexts to organize code by business process rather than technical layer. It distinguishes itself through a systematic migration framework that allows developers to transition from a monolithic codebase to independent, distributed services. This is achieved by replacing internal communication with robust, event-driven messaging and ensuring that domain logic remains decoupled from persistence and infrastructure concerns.
The project covers a broad capability surface, including tactical domain modeling with aggregates and entities, automated testing strategies using containerized infrastructure, and the maintenance of architectural decision records to track design evolution. It also provides tooling for local development orchestration and static analysis to enforce quality standards across independent modules.
The repository is structured as a practical guide, offering a step-by-step methodology for scaling software architecture incrementally.
Features
- Modular Monoliths - Provides comprehensive guidance on building single-unit applications structured into independent, feature-based modules.
- Domain Driven Design - Provides educational resources and practical examples for implementing domain-driven design patterns.
- Business Invariant Enforcement - Validates entity state against defined business rules to ensure consistency during state transitions.
- Domain-Driven Entity Frameworks - Provides structural environments for implementing aggregates that manage consistency boundaries and state changes.
- Aggregate State Management - Encapsulates business logic and state transitions within a central object to maintain consistency.
- Vertical Slices - Groups related logic and dependencies into self-contained feature folders to simplify maintenance.
- .NET Architecture Guides - Offers a comprehensive educational resource for building modular monoliths and microservices using .NET.
- Component-Based Module Organizations - Structures code into self-contained modules that encapsulate logic and routing for improved maintainability.
- Bounded Context Definition - Specifies the roles, responsibilities, and boundaries for different domain models to prevent logic conflicts.
- Modular Monolith Strategies - Provides strategies for delaying the transition to microservices by favoring isolated modules until independent deployment becomes necessary.
- Isolated Monolithic Modules - Organizes functionality into isolated modules within a single deployment unit to manage complexity and data access requirements.
- Domain-Persistence Decoupling - Separates business entity definitions from database schemas to ensure domain rules remain independent of infrastructure.
- Bounded Contexts - Defines explicit boundaries that establish the responsibility and linguistic scope of a specific domain model.
- Domain Event Emission - Triggers notifications when state changes occur within an entity to allow asynchronous system reaction.
- Domain Logic Patterns - Provides standards for organizing business logic, associations, and validations within the model layer.
- Code Quality and Analysis - Uses static analysis and linting tools to enforce coding standards and identify potential bugs.
- Message Brokers - Uses infrastructure components to decouple service communication by facilitating asynchronous data exchange through message queues.
- Architecture Decision Records - Provides a system for documenting and tracking technical design choices and their rationale.
- Cross-Module API Definitions - Establishes shared data formats and interface contracts to ensure consistent communication between internal system modules.
- Module-to-Service Extractions - Provides strategies for decomposing internal application modules into independent microservices via API definition and IPC.
- Event Bus Systems - Provides architectural patterns and utilities for decoupled communication between application components.
- Event Driven Messaging - Provides interfaces and abstractions for decoupling services through asynchronous message delivery and pub-sub patterns.
- Inter-Module Communication - Provides mechanisms for invoking functions and exchanging data between isolated internal modules.
- Migration Strategies - Outlines strategies for transitioning from monolithic codebases to distributed services through incremental service extraction.
- Value Objects - Encapsulates data with built-in validation logic to represent domain concepts without identity.
- Context-Based Organizations - Structures code by business domain context to ensure business processes are self-contained.
- Shared Event Definitions - Distributes shared event definitions as versioned packages to maintain consistency across multiple services.
- Separation of Concerns - Enforces separation of concerns by grouping related business logic into distinct projects.
- Isolated Module Testing - Tests individual modules in isolation to enable targeted verification of business domains.
- Migration Methodologies - Provides a step-by-step methodology for transitioning monolithic applications into distributed services using message-based communication.
- Integration Test Suites - Verifies the interaction between different components of a system in a containerized environment.
- Containerized Integration Tests - Execute integration tests against isolated database instances running in containers to ensure reliable verification of service behavior in a production-like environment.
- End-to-End Testing - Simulates complete business workflows across the application stack to verify functional correctness.
- Containerized Integration Tests - Automates testing that verifies component interactions using production-like container environments.
