Hit the Ground Running with the Spring Security Java Configuration

Eugen Paraschiv Developer Tips, Tricks & Resources

Introduction to Spring Security In this article, you’ll learn how to quickly and easily configure and set up a Spring Security based web application using the Java configuration. Security is, not surprisingly, an evergrowing concern and certainly a core focus of any developer working on applications today. Project Setup The fastest way to get on track with Spring Security is …

Java custom exceptions

Why, When and How to Implement Custom Exceptions in Java

Thorben Janssen Developer Tips, Tricks & Resources

We already talked a lot about exception handling on this blog and described the differences between checked and unchecked exceptions, best practices and common mistakes. If you’ve read these posts, you probably recognized a pattern. You should provide detailed information about the situation that caused the exception, and you should not remove anything that might be useful to the caller. …

Features of Spring Web MVC

How Spring Web MVC Really Works

Eugen Paraschiv Developer Tips, Tricks & Resources

Introduction This is an in-depth look at the powerful features and internal workings of Spring Web MVC, which is a part of the Spring Framework. The source code for this article is available over on GitHub. Project Setup Throughout this article, we’ll use the latest and greatest Spring Framework 5. We’re focusing here on the Spring’s classic web stack, which …

Java application monitoring metrics

How To Track and Monitor Critical Java Application Metrics

Eugen Paraschiv Developer Tips, Tricks & Resources, Stackify Product & Company Updates

Overview of Java application metrics Monitoring a running application is crucial for visibility and making sure the system is functioning as expected, as well as to identify any potential issues, tweak and optimize the running conditions, and resolve any errors that may occur. This is where Application Performance Monitoring (APM) tools can make your life a whole lot easier by …

Java Virtual Machine (JVM)

Java Virtual Machine: Critical Metrics You Need to Track

Eugen Paraschiv Developer Tips, Tricks & Resources, Popular

Overview of JVM Metrics In this article, we’ll cover how you can monitor an application that runs on the Java Virtual Machine by going over some of the critical metrics you need to track. And, as a monitoring tool, we’ll use Stackify Retrace, a full APM solution. The application we’ll monitor to exemplify these metrics is a real-world Java web …

Multiple Media Types in Java Microservices with RESTEasy

Lyndsey Padget Developer Tips, Tricks & Resources

Today we’ll be talking about microservices in Java. While it’s true that Java EE has a robust platform for writing, deploying, and managing enterprise-level microservices, in this article I will create a RESTful microservice that is as slim as possible. Don’t worry – we won’t be reinventing the wheel by marshaling our own data or anything. We’ll be using JBoss’ …

10 Java Blogs

Top 10 Java Blogs for Programmers of All Levels

Ben Putano Developer Tips, Tricks & Resources

The world of information technology is an ever-changing landscape. Simply thinking back to the infrastructure and functions of a webpage 5, 10, 15 years ago can make any programmer cringe. Staying current on industry strategies and best practices is essential for developers of all levels. Blogs can provide great insight and perspective from industry peers and colleagues. All over the …

How To Monitor Java Services with Retrace

How to Monitor Java Services – Performance, Errors, and more

Matt Watson Developer Tips, Tricks & Resources

In the real world, a lot of mission-critical business logic lives in background services. Buying something from an e-commerce website, like Amazon, kicks off a wide array of tasks that must be completed after you click to confirm your order. Monitoring the performance of your web applications is only part of the puzzle if you want to proactively ensure your …

Tomcat Monitoring

A Step By Step Guide to Tomcat Performance Monitoring

Eugen Paraschiv Developer Tips, Tricks & Resources

Overview Monitoring the metrics and runtime characteristics of an application server is essential to ensure the adequate functioning of the applications running on that server, as well as to prevent or resolve potential issues in a timely manner. As far as Java applications go, one of the most commonly used servers is Apache Tomcat, which will be the focus of …

Java Glossary and the Core Concepts in the Java Language

Eugen Paraschiv Developer Tips, Tricks & Resources

Java Language and Terminology In this article, we’ll explore the foundations and core concepts of the Java language and terminology. The write-up is divided into sections, ordered alphabetically to enable fast and easy search for these definitions. A abstract – a keyword used in a class or method definition, which specifies that the method/class is not going to be instantiated, …

Finally, An Official Shell in Java 9 – Introducing JShell

Eugen Paraschiv Developer Tips, Tricks & Resources

Introduction to JShell The shell or the REPL is a well-known tool in many programming languages. Typically, this is more common in scripting languages such as Python or Node, but more recently it’s been adopted by JVM languages like Clojure and Groovy as well. The upcoming Java 9 release finally brings this shell functionality to the Java language as well, in the form …

Java Microservices

Communication Between Microservices: How to Avoid Common Problems

Thorben Janssen Developer Tips, Tricks & Resources

In one of the previous posts, I showed you how to build a microservice with Java EE and JBoss Forge. But building one microservice is obviously not enough. The overall idea of this architectural style is to implement an application as a system of services. In the beginning, that seems like an easy task. As long as each service solves only …

Spring 5 Reactive Programming

Doing Reactive Programming with Spring 5

Eugen Paraschiv Developer Tips, Tricks & Resources

The upcoming Spring 5 Framework has a strong focus on Reactive Programming, allowing us to write both servers and clients using this paradigm. The Spring 5 implementation uses the popular Project Reactor as a base. This article will be an introduction to writing both Reactive Clients and Servers using the new tools available in version 5 of the framework. What Is …

Java 8 Optional

Understanding, Accepting and Leveraging Optional in Java

Eugen Paraschiv Developer Tips, Tricks & Resources

Overview One of the most interesting features that Java 8 introduces to the language is the new Optional class. The main issue this class is intended to tackle is the infamous NullPointerException that every Java programmer knows only too well. Essentially, this is a wrapper class that contains an optional value, meaning it can either contain an object or it can …

Java Stack vs. Heap

Java Heap Space vs. Stack Memory: How Java Applications Allocate Memory

Angela Stringfellow Developer Tips, Tricks & Resources

Java applications need a certain amount of RAM on a computer to run. Each time an object or variable is declared, it needs more RAM. Simply designating enough memory to hold every value declared and run each method would lead to a bloated application. To keep application memory requirements lean, it is partitioned in ways that require less memory and …

Common Mistake to Avoid with Java Exception Handling

7 Common Mistakes You Should Avoid When Handling Java Exceptions

Thorben Janssen Developer Tips, Tricks & Resources

Handling an exception is one of the most common but not necessarily one of the easiest tasks. It is still one of the frequently discussed topics in experienced teams, and there are several best practices and common mistakes you should be aware of. Here are a few things you should avoid when handling exceptions in your application. Mistake 1: Specify …

Use Jackson XML module to support for both JSON and XML data

Solving the XML Problem with Jackson

Eugen Paraschiv Developer Tips, Tricks & Resources

Introduction Jackson is a popular library for handling JSON in Java applications, quickly becoming the de-facto standard in the ecosystem. Starting with version 2, it has also introduced a mature XML implementation alongside its established JSON support. Adding Jackson XML to the Project Adding the Jackson XML module to the project only needs a single dependency – the Jackson XML …

Understand Java Memory Leaks

How Memory Leaks Happen in a Java Application

Eugen Paraschiv Developer Tips, Tricks & Resources

Introduction to Memory Leaks In Java Apps One of the core benefits of Java is the JVM, which is an out-of-the-box memory management. Essentially, we can create objects and the Java Garbage Collector will take care of allocating and freeing up memory for us. Nevertheless, memory leaks can still occur in Java applications. In this article, we’re going to describe the …