Awesome GitHub RepositoriesDeclarative API Clients

Retrofit is a type-safe HTTP client that simplifies network communication by allowing developers to define API endpoints as interface methods. By using annotation-driven request mapping, it automatically translates these interface definitions into structured HTTP requests, ensuring consistent data structures and reducing manual configuration when interacting with remote web services. The project distinguishes itself through a highly modular architecture that separates network transport from data handling. It utilizes dynamic proxy generation to process method calls at runtime and offers a plu

PiggyMetrics is a demonstration project that illustrates a complete microservice architecture built with Spring Boot, Spring Cloud, and Docker, centered around a personal finance tracking application. It records incomes, expenses, and savings for individual accounts while computing spending statistics and time-series data to track cash flow dynamics over time. The project showcases a full Spring Cloud service mesh, including an API gateway for request routing, service discovery for dynamic instance location, and a centralized configuration server that manages application settings from a singl

Feign is a declarative Java HTTP client that automates the generation of web service clients. It allows developers to define REST API endpoints using interfaces and annotations, removing the need to write manual request and response boilerplate code. The project uses dynamic proxies to map method calls to HTTP request templates. It features a pluggable pipeline of encoders and decoders to transform Java objects into request bodies and convert response bodies back into type-safe objects. The library covers a broad range of integration capabilities, including request interception for header ma

Feign is a declarative Java HTTP client framework that maps method signatures to REST API requests. It functions as an HTTP interface mapper, allowing the creation of type-safe clients by defining service interfaces with annotations to eliminate manual request logic. The framework features a pluggable HTTP transport layer, which decouples request definition from execution by routing network traffic through interchangeable underlying HTTP engines. It provides a comprehensive request management pipeline including interceptors for modifying headers, policy-driven retry logic for failure recover

SpringCloud-Learning is an educational project that demonstrates how to build microservices using Spring Cloud, covering the core patterns of service discovery, centralized configuration management, and API gateway routing. The project provides hands-on examples for registering and discovering microservice instances with Nacos, Eureka, or Consul, and for routing external API requests through Spring Cloud Gateway with support for filters and load balancing. The tutorials explore service resilience through circuit breakers and rate limiting with Sentinel and Hystrix, including custom fallback l