Long before Dockerfiles, Java developers worked with single deployment units (WARs, JARs, EARs, etc.). As you likely know by now, it is best practice to work in micro-services, deploying a small number of deployment units per JVM. Instead of one giant, monolithic application, you build your application such that each service can run on its own. This is where Docker comes in!
In this article we will look at the agent-like instrumentation tool T-Trace. The tool provides non-intrusive instrumentation capabilities for applications running on GraalVM. We will instrument a simple NodeJS application by using T-Trace and OpenTracing API with Jaeger NodeJS tracer.
When starting development on a new front end project, I always ask myself "Which JavaScript unit testing frameworks should I use?" My colleagues often write about how unit tests are great for peace of mind and reducing software errors. So I always make the time to test. But which framework should you choose for your project? Before rushing into any decisions, I investigated seven of the most popular JavaScript unit testing frameworks so you can decide which one is best for you.
Working with Java applications has a lot of benefits. Especially when compared to languages like C/C++. In the majority of cases, you get interoperability between operating systems and various environments. You can move your applications from server to server, from operating system to operating system, without major effort or in rare cases with minor changes.
In this tutorial, we will talk about how different Java Garbage Collectors work and what you can expect from them. This will give us the necessary background to start tuning the garbage collection algorithm of your choice. Before going into Java Garbage Collection tuning we need to understand two things. First of all, how garbage collection works in theory and how it works in the system we are going to tune.
When working with Java or any other JVM-based programming language we get certain functionalities for free. One of those functionalities is clearing the memory. If you’ve ever used languages like C/C++ you probably remember functions like malloc, calloc, realloc and free. We needed to take care of the assignment of each byte in memory and take care of releasing the assigned memory when it was no longer needed.
Java agents are a special type of class which, by using the Java Instrumentation API, can intercept applications running on the JVM, modifying their bytecode. Java agents aren’t a new piece of technology. On the contrary, they’ve existed since Java 5. But even after all of this time, many developers still have misconceptions about this feature—and others don’t even know about it. In this post, we remedy this situation by giving you a quick guide on Java agents.
We're delighted to announce our CloudWatch Integration for Elastic Load Balancer and AppDynamics Serverless APM, which now supports the instrumentation of AWS Lambda applications and microservices in both Node.js and Java.
Oracle WebLogic Server (WLS) is one of the leading Java Enterprise Edition (Java EE) application servers in the market today. Offering a robust, mature, and scalable implementation of the J2EE specification, the WebLogic Platform is a unified, extensible platform for developing and deploying applications based on Service-Oriented Architectures (SOA).
Many things in programming sound like they should be easy, but are quite hard. Calculating elapsed time in Java is one of those. How hard could that be? As it turns out, it can be tricky. For starters, we have the fact that time itself is a tricky concept. For a quick example, remember that many places around the world observe Daylight Savings Time. Failing to take DST into account when you should, can and often does result in incorrect calculations.
