In modern distributed systems, especially those deployed across multiple data centers or availability zones (e.g., active-active configurations), optimizing service calls for proximity is crucial. This typically means a service instance should prioritize calling another service instance within its o...
Manually concatenating URL strings in RestTemplate becomes cumbersome and error-prone when dealing with multiple request parameters. OpenFeign solves this by providing a declarative, template-based HTTP client that allows developers to invoke remote services as if they were local method calls. Sprin...
Spring Boot Admin provides a web-based management interface for Spring Boot applications. Built on top of Spring Boot Actuator, it offers a visual dashboard for monitoring application health, metrics, and configurations. Key capabilities include:Application status and version trackingLog level manag...
Spring Cloud Gateway, built on the Spring Framework, serves as an API gateway for microservices architectures. It provides a mechanism to handle Cross-Origin Resource Sharing (CORS), a common requirement when web applications served from one origin need to make requests to APIs hosted on a different...
In distributed architectures, service dependencies create complex interaction networks where component failures can cascade through the system. When a service becomes unresponsive, client services may experience thread blocking during remote calls. This single point of failure can exhaust thread poo...
Maven Module Configuration Initiate a new Maven JAR module within your existing microservices parent project. Configure the pom.xml to include the necessary dependencies for Spring Cloud Gateway, Nacos service discovery, and Nacos configuration management. <project xmlns="http://maven.apache.org/...
OpenFeign Integration with Nacos 1. Dependencies & Initial Setup First, add required dependencies to your Maven pom.xml: <!-- OpenFeign core for remote service calls --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openf...
Overview In previous articles, we focused on implementing the authentication module within the Spring Cloud ecosystem, verifying the identity of logged-in users. In this article, we will explore the authorization functionality in Spring Cloud, determining whether a user has access to specific featur...
Eureka is a REST-based service governence framework open-sourced by Netflix, designed for service registration, discovery, and location within cloud environments. The system is divided into two core components: Eureka Server and Eureka Client. Eureka Server: Acts as the registry center, managing the...
Overview of Spring Cloud Spring Cloud is a framework built on Spring Boot that facilitates the development of distributed systems and microservices. It provides tools for integrating with external systems and managing service interactions. Spring Cloud includes components like Spring Cloud Stream fo...