Java & Spring

Batch Processing with Spring Boot, Spring Batch & JPA

Processing large datasets efficiently is a cornerstone of enterprise applications. Whether it’s payroll calculations, data migrations, or report generation, batch processing ensures scalable, transactional, and fault-tolerant operations without overwhelming system resources. In service-oriented architectures, batch jobs often run independently, processing accumulated data in scheduled intervals rather than real-time processing every individual transaction. In this article, […]

Complete Guide to Logging in Java

Logging is an essential part of software development, enabling developers to monitor, debug, and analyze their applications. Whether you’re building a small utility or a complex enterprise application, effective logging can save hours of troubleshooting and improve the maintainability of your code. What is Logging, and Why is it Important? At its core, logging is

Securing REST API with Spring Security, OAuth2, JWT & Keycloak

Securing APIs is a critical part of building resilient microservice architectures. In service‑to‑service scenarios, using user-based authentication falls short. Instead, service accounts and OAuth2 client credentials provide a cleaner, more scalable alternative without hardcoding secrets or credentials. In this article, we’ll explore: You can find the full reference implementation in the secure-rest-api module of my

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