Introduction to Go Food Delivery Microservices
The "Go Food Delivery Microservices" project is an exemplary microservices-based application built using Golang. Designed as a demonstration rather than a business-oriented solution, this project explores the technical implementation of a food delivery platform. Emphasizing software architecture techniques such as Microservices, Vertical Slice Architecture, CQRS (Command Query Responsibility Segregation) Pattern, Domain Driven Design (DDD), Event Sourcing, and Dependency Injection, the project showcases the integration of diverse technologies and design principles.
Key Features
The project boasts a range of cutting-edge features:
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Vertical Slice Architecture: This architecture organizes code based on features rather than technical layers, minimizing dependencies and easing feature development and maintenance.
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Event Driven Architecture: It utilizes RabbitMQ for asynchronous messaging, enabling microservices to communicate effectively.
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Data-Centric Architecture: Focusing on CRUD operations within the Catalogs Read Service, this architecture integrates seamlessly with other components.
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Event Sourcing: Employed in services like the Orders Service, it records every change in the system as a sequence of events.
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CQRS and Mediator Patterns: These patterns separate read and write operations, enhancing performance and scalability.
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Dependency Injection: Simplifying code maintainability, it is implemented via the Uber-go/fx library.
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RESTful APIs and gRPC: The application uses Echo and gRPC for building robust APIs with Swagger for documentation.
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Databases Used: Postgres and EventStoreDB handle transactions, while MongoDB and Elasticsearch manage NoSQL data.
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Monitoring and Logging: OpenTelemetry along with Prometheus and Grafana handle metrics and distributed tracing, and Zap is used for logging.
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Testing: The project includes unit, integration, and end-to-end tests using Mockery and testcontainers-go.
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Other tools: Configuration management is performed by Viper, and deployment is managed through Docker and docker-compose.
Technologies and Libraries
The application leverages several essential libraries:
- Echo: A minimalist Go web framework.
- Zap: A high-performance logging library.
- OpenTelemetry: For gathering metrics and tracing.
- RabbitMQ: For messaging between services.
- Go-Mediatr: Facilitates CQRS implementation.
- Prometheus and Grafana: For metrics and analytics.
System Architecture
The architecture is based on the vertical slice model. This approach ensures that each feature is self-contained and operates independently from others, minimizing cross-cutting concerns and streamlining development.
Project Layout and Structure
The microservices follow the Standard Go Project Layout, which organizes the project into clear and maintainable submodules.
Development Tools and Contribution
The project supports live reloading during development using Air, ensuring easy and immediate testing of changes. For contributing, users are encouraged to participate by submitting pull requests or reporting issues as outlined in the contribution guide.
Conclusion
"Go Food Delivery Microservices" serves as an educational resource for developers interested in exploring modern architectural patterns and technologies using Golang. Although still evolving, it sets a strong foundation for implementing scalable and efficient microservice applications.
Developers can explore this project to gain insights into building robust backend systems using contemporary design principles and tools. The project is open-source, providing an excellent opportunity for collaboration and learning in the vibrant open-source community.