Spring Cloud Sleuth is a distributed tracing solution that helps you troubleshoot and monitor complex microservice architectures. It is a library that provides distributed tracing and logging capabilities for Spring Boot applications. It integrates with OpenZipkin Brave to add unique identifiers (trace IDs and span IDs) to log entries, making it easier to track and diagnose issues across multiple services.

Netflix Eureka is a RESTful service that acts as a service registry for microservices. It’s primarily used for service discovery, load balancing, and failover in distributed systems. Eureka allows microservices to register themselves and discover other services dynamically, which simplifies the process of communication between different services.

Integrating Swagger into Spring Boot applications can greatly simplify the process of documenting and testing APIs. Here’s how to do it using springdoc-openapi library.

GraphQL can query multiple APIs on the backend. Here is an example.

Both fetch and ajax (Asynchronous Javascript and XML) are used for making asynchronous HTTP requests, but they have some key differences in terms of usage, features and modern web development practices.

Gson

AWS S3 Commands

Set up the Springboot project

Setup up a Springboot application

Add dependencies