Java Web Development (JSP/Servlets) Services

Replatforming from Java 8 to the newer Java versions has proven to be a huge challenge due to potential compatibility issues and changes in language specifications. The Spring Framework, which provides a programming and configuration model for modern Java applications, has just released its latest major version, Spring Framework 6.2.10, and it requires a baseline of Java 17 or higher. Because of this, migrating from an older version like Java 8 would involve code modifications, which take considerable effort and rigorous testing.

Before diving deep into version upgrades for Java applications, let us first discuss what Amazon Q developer is and how it helps developers with application modernization.

This article will explain some basics of the HashiCorp Consul service and its configurations. It is a service networking solution that provides service registry and discovery capabilities, which integrate seamlessly with Spring Boot. You may have heard of Netflix Eureka; here, Consul works similarly but offers many additional features. Notably, it supports the modern reactive programming paradigm. I will walk you through with the help of some applications.

• Spring Boot
• Spring Cloud Gateway
• Spring Cloud Consul
• Spring Boot Actuator

The architecture includes three main components:

In this blog, we will take a closer look at Spring Security, specifically in combination with Keycloak using OpenID Connect, all supported with examples and unit tests. Enjoy!

Introduction

Many applications are supported by means of authentication and authorization. However, it is also something software developers find difficult to grasp. In this blog, Spring Security is introduced, which is Spring's solution for adding security to your Spring applications. By means of examples and unit tests, you will learn the annotations and Spring classes. The end goal is to set up an application using OpenID Connect in combination with Keycloak. An introduction to OpenID Connect and Keycloak can be found in a previous blog. It is advised to read this blog if you are not yet familiar with the concepts.

Amazon EKS makes running containerized applications easier, but it doesn’t give you automatic visibility into JVM internals like memory usage or garbage collection. For Java applications, observability requires two levels of integration:

• Cluster-level monitoring for pods, nodes, and deployments
• JVM-level APM instrumentation for heap, GC, threads, latency, etc.

New Relic provides both via Helm for infrastructure metrics, and a lightweight Java agent for full JVM observability.

Many times, while developing at work, I needed a template for a simple application from which to start adding specific code for the project at hand.

In this article, I will create a simple Java application that connects to a database, exposes a few rest endpoints and secures those endpoints with role based access.