Static ObjectMapper in Java: Performance and Design Considerations Jackson’s ObjectMapper is a versatile and flexible tool for JSON processing in Java. However, how you manage its lifecycle, whether as a static field, singleton bean or per-use instance, can significantly impact your application’s performance, maintainability and thread safety. This article will explore the implications of using ObjectMapper as a static field and outline best …
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GitOps for Java Developers: Automating Deployments with ArgoCD and Kubernetes Let’s face it—most Java developers are great at writing code but find Kubernetes deployments and infrastructure automation a bit daunting. GitOps changes the game by turning deployment into a version-controlled, auditable, and reproducible process—just like your code. This article introduces GitOps from a Java developer’s perspective. You’ll learn how to: Use Git as your single …
https://www.javacodegeeks.com/....2025/08/gitops-for-j

Observability Beyond Logs: Distributed Tracing with OpenTelemetry in Java In the age of microservices and cloud-native systems, debugging with logs alone is like navigating a maze with a flashlight—you only see a piece of the puzzle. Distributed tracing offers a complete map. In this article, you’ll learn how to integrate OpenTelemetry tracing into a Java (Spring Boot) application, send traces to Jaeger or Grafana …
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Fix “Illegal Repetition” PatternSyntaxException in Java In Java, regular expressions (regex) offer powerful string matching capabilities via the java.util.regex package. However, writing incorrect regex patterns can lead to a common runtime error: java.util.regex.PatternSyntaxException: Illegal repetition near index This exception can confuse many developers, especially when the regex appears visually correct. Let us delve into understanding the java.util.regex.PatternSyntaxException, specifically the “illegal repetition …
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H2 Stored Procedures in Java Stored procedures are a common way to encapsulate reusable logic within a database. While H2 is an in-memory Java SQL database primarily used for development and testing, it also supports Java-based stored procedures and user-defined functions. Let us delve into understanding how Java H2 stored procedures can be written, registered, and invoked effectively using user-defined …
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