2016-02-09 14:00
A handy HotSpot JVM flag (option for the Java launcher java) is the -XshowSettings option. This option is described in the Oracle Java launcher description page as follows: &nb&hell…Read More
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2016-02-09 11:00
Scene 1: Tragedy We’re in a retrospective. This was after a major event, so we discussed a few of the things that have gone awry, like delayed integration with other teams, unfinished… Read More
2016-02-09 08:00
1. Introduction It has been a long wait, but I am finally publishing a tutorial on creating the first SOAP based web service application with Spring. JAX-WS (Java API for XML… Read More
2016-02-09 05:00
So we all know the prejudice that Java being interpreted is slow and that C being compiled and optimized runs very fast. Well as you might know, the picture is quite different. TL;DR Java is… Read More
2016-02-08 23:00
One of the small but welcome features introduced with Oracle’s HotSpot implementation of Java 8 is the addition of many common HotSpot Java launcher (java) options/flags to the launche… Read More
2016-02-08 20:00
Docker daemon provides a Remote REST API. This API is used by the Client to communicate with the engine. This API can be also be invoked by by other tools, such as curl or Chrome P… Read More
2016-02-08 17:00
A question raises spontaneously: why Eventual Consistency? Isn’t ACID enough? Let’s try to understand the need for Eventual Consistency guarantees when we talk about Distributed… Read More
2016-02-08 14:00
Today I would like to tell you about Factory Method Pattern and Abstract Factory Pattern. The purpose of the article is to help you recognize places where one of them should be used. What wi… Read More
2016-02-08 11:00
A previous post noted that source code structure decays because there are many more ways to build a poorly structured system than a well-structured one, and so, without strict structural gui… Read More
2016-02-08 09:00
EDITORIAL NOTE: Apache Hadoop is an open-source software framework written in Java for distributed storage and distributed processing of very large data sets on computer clusters built from… Read More
2016-02-07 13:00
How to build a minimal JVM container with Docker on Alpine Linux? There has definitely been an awakening of some kind. Lately we’ve been hearing more and more about Alpine Linux, a lig… Read More
2016-02-06 13:00
Docker 1.10 is now released! Read about all the new features in Docker 1.10. A quick summary: New Compose file format Much better networking Much better security Swarm becomes 1.1, with Meso… Read More
2016-02-05 20:00
Red Hat recently released a Microservices integration toolkit for running our microservices in a Docker and Kubernetes environment on OpenShift v3. To help people understand this a little bi… Read More
2016-02-05 17:00
Have you felt the need to run Docker containers on Amazon? Amazon Container Service requires extensive setup and manual work. This is meant for programmers who have plenty of time… Read More
2016-02-05 14:00
Editor’s note: This is a post by Apache Flink PMC members Fabian Hueske and Kostas Tzoumas. Fabian and Kostas are also co-founders of data Artisans. A very large p… Read More
2016-02-04 20:00
The hands-on guide to Jigsaw brushes past a feature I would like to discuss in more detail: implied readability. With it, a module can reexport another module’s API to its own dependen… Read More
2016-02-04 17:00
Blog posts and discussion threads about the overwhelming stress felt by those in the software industry seem increasingly popular of late, and authors usually infer that the pressures (or com… Read More
2016-02-04 14:00
DCHQ is fully compatible with Docker Compose (https://docs.docker.com/compose/compose-file/). The platform however provides core (optional) enhancements to Docker Compose supporting advanced… Read More
2016-02-04 11:00
During the last weeks I have shown how to create a proxy object using Java reflection API and cglib. In this article I will show you how this can be done using djcproxy. Oh, not again, anoth… Read More
2016-02-04 08:00
The TableView (and TreeTableView) of JavaFX has won the price for being the control that was mentioned the most in my recent “JavaFX Missing Features” survey and also in many fol… Read More
2016-02-03 20:00
Since developers should learn a new programming language every year, I felt it was about time for me to dive into something new and I decided on Go. The good news is that Go has awesome… Read More
2016-02-03 14:00
I’ve been meaning to write about the managers and Agile software development for a long time. And, apart from a few asides, I haven’t. Why not? Well partly because the topic is d… Read More
2016-02-03 08:00
DuyHai Doan is an Apache Cassandra Evangelist at DataStax. He spends his time between technical presentations/meetups on Cassandra, coding on open source projects to support the community an… Read More
2016-02-02 20:00
The project I’m involved in will face great challenges in the upcoming years. That was the reason why we have decided to focus on improving performance of the application before these… Read More
2016-02-02 17:00
After filtering a Java 8 Stream it is common to use findFirst() or findAny() to get the element that survived the filter. But that might not do what you really meant and subtle bugs can ensu… Read More
2016-02-02 11:00
As we proceed on different architectures and implementations the need for versatile stress testing tools rises. Apache Jmeter is one the most well known tools when it comes to load testing… Read More
2016-02-02 06:37
Integration tests can be slow and unreliable because they depend on too many components in the system. Up to a certain point, this is unavoidable: integration tests are here to validate how… Read More
2016-02-01 20:00
In the previous post we saw how to work with query parameters in Java EE MVC. This post continues with a very similar topic: path parameters. Path parameters are a dynamic part of the reques… Read More
2016-02-01 17:38
For all those developers interested in bootstrapping Spring 4 application quickly without Spring Boot, please check my Spring MVC 4 Quickstart Maven Archetype that just got updated. Archetyp… Read More
2016-02-01 14:00
Just now, we implemented a nice little feature in jOOQ’s code generator: https://github.com/jOOQ/jOOQ/issues/4974 It detects whenever the jOOQ code generator runs a slow query to rever… Read More
2016-02-01 11:00
This post is a follow up of the libgdx and Kotlin post. I have decided to prototype a simple 2D platformer (along the lines of Star Assault from my early posts), but instead of Java, I am us… Read More
2016-02-01 08:00
Something simple, but I struggled with this recently – I had to make a Netflix Ribbon based client call to a secured remote service. It turns out there are two ways to do this using Ne… Read More
2016-02-01 05:00
This time, it’s personal. Super Bowl 50 is being played at Levi’s Stadium in Santa Clara – within sight of many of the world’s most innovative technology companies, i… Read More
2016-01-31 23:00
In one of my projects I was fighting with a memory leak the last couple of days (yes … “couple”) and I came to the conclusion that there might be an issue related to touch… Read More
2016-01-31 13:00
This post describes my recent experience with Hibernate ORM. Over the years the framework has not stopped to amaze me in regards of performance problems you can end up with while using it. I… Read More
2016-01-30 13:00
In the previous post I was talking about the standard Java based proxy objects. These can be used when you want to have a method invocation handler on an object that implements an interface… Read More
2016-01-29 20:00
1. Introduction We might have been across some of the several ways by which we can handle exceptions in a RESTful web service application in Spring. In this article, we will try to expl… Read More
2016-01-29 17:00
Ivan Linhares is an Engineering Manager at Chaordic. He has been working as a lead engineer and software developer for more than fifteen years. He is passionate for developing great teams an… Read More
2016-01-29 14:00
When I see development teams I expect to see more programmers than requirements people (BAs, Product Managers, etc.), and I expect to see even fewer management types. Think of it like a staf… Read More
2016-01-29 11:00
Docker here, Docker there, I see Dockers everywhere In this post I will describe process of migrating Spring Boot application to Docker. We will start with modifying build file, then we will… Read More
2016-01-29 08:00
Recently, we’ve published our article about the awesome window function support in jOOλ 0.9.9, which I believe is some of the best additions to the library that we’ve ever… Read More
2016-01-29 05:00
Having worked a number of years with connected devices, I thought I’d like to briefly share some observations and pitfalls that folks just arriving to the field should heed. The networ… Read More
2016-01-28 23:00
Let’s face it. The systems we are creating are not perfect. Sooner or later, one of our applications will fail, one of our services will not be able to handle the increased load, one o… Read More
2016-01-28 20:00
1. Introduction In the first tutorial we created a basic OpenMap GIS application that displays a map with one shape layer, loaded from the filesystem, inside a JFrame. That tutorial was base… Read More
2016-01-28 18:45
Proxy is a design pattern. We create and use proxy objects when we want to add or modify some functionality of an already existing class. The proxy object is used instead of the original one… Read More
2016-01-28 17:00
Developing an open source Android Library is a great experience. You have the chance to pay back with your work all the times you used an open source library. There are a lot of libraries th… Read More
2016-01-28 14:00
Are you ready to start streaming all the events in your business? What happens to your streaming solution when you outgrow your single data center? What happens when you are at a company tha… Read More
2016-01-28 11:00
Is Agile Development making your development team dread coming into work? Several years ago, a company I was new to had been pushing the need for agile development. After numerous meetings… Read More
2016-01-28 10:21
How an engineer should NOT look at technical matters Dynamic versus static typing is one of those confrontations that seams to attracts zealots. It really sadden me to see how people tend to… Read More
2016-01-27 14:00
Automate all the things! Slack slash commands to the rescue Every day at noon, lunch orders are launched. All the places we order our food from support online orders BUT there’s this o… Read More
2016-01-27 08:00
I was working on a single page application where i wanted to use the grid functionality in one part of the application which was using Spring MVC. It has been some time since i last used JQG… Read More
2016-01-26 20:29
Do you want to know what is the best investment you can make with your time and money? Knowledge As a software developer you should be constantly acquiring new skills. This is the best way t… Read More
2016-01-26 14:00
Every now and then, I get questions around optimising Camel applications with the argument that Camel is slow. Camel is just the glue connecting disparate systems, the routing engine is all… Read More
2016-01-26 11:00
Thinking aloud about productivity, what I’m currently doing about it and where I think I need to improve a lot. I listen to a lot of podcasts (usually while doing the housekeeping once… Read More
2016-01-26 08:45
Abstract This tutorial gives an example of how to use Hewlett Packard Enterprise’s AppPulse Mobile to monitor your application’s performance. We will walk through how AppPulse Mo… Read More
2016-01-26 08:10
I’ve been playing around with Clojure a bit today in preparation for a talk I’m giving next week and found myself writing the following code to apply the same function to three d… Read More
2016-01-25 20:00
Both array and ArrayList are two important data structures in Java and are frequently used in Java programs. Even though ArrayList is internally backed by an array, knowing the difference be… Read More
2016-01-25 17:00
I’ve been reading lately about different languages and what they can bring to the already crowded table of software developers, and one language stood out for me: Kotlin. (https://kotl… Read More
2016-01-25 14:00
Something that is constantly bothering me when developing the OPP project is the use of hard-coded Java library dependencies. I manually downloaded the jars for the libraries I use, copied t… Read More
2016-01-25 11:00
Intro In today’s article, we follow up last week’s article about making Kotlin-like builders in Java and Python, expanding the builder APIs to take some of the optional parameter… Read More
2016-01-25 08:00
Managing a cluster of Docker/Rocket containers (or anything) in a production environment is rife with distributed-systems challenges. Luckily, a compelling and very vibrant community around… Read More
2006-06-07 11:16
The Cursive plugin for Clojure is now out of its beta testing phase. I have been using it throughout its beta program and, I must say, it is pretty good. Sure, the refactoring capabilities a… Read More
2006-06-07 11:16
ArrayList in Java is the most frequently used collection class after HashMap. Java ArrayList represents an automatic re-sizeable array and used in place of array. Since we can not modif… Read More
2006-06-07 11:16
Many will tell you that they have a scalable system. After all, scaling is easy. Buy a server, install WebLogic (or whichever other monster application server you’re using) and deploy… Read More
2006-06-07 11:16
AppDynamics enables companies to achieve and maintain the level of application performance that’s demanded by today’s software defined business. Try AppDynamics for Java and get… Read More
2006-06-07 11:16
On a recent project, I was faced with an interesting problem: take a service method that was given a single object and reuse the same code in the context of a nightly process that would run… Read More
2006-06-07 11:16
Here’s another nice trick we used when creating the ultra low latency Chronicle FIX-Engine. When it comes to reading data off a stream of bytes it’s way more efficient, if possib… Read More
2006-06-07 11:16
Are people in your data analytics organization contemplating the impending data avalanche from the internet of things and thus asking this question: “Spark or Hadoop?” That&rsquo&hell…Read More
2006-06-07 11:16
I’ve written a lot about testing. Some tips on integration tests, some how-tos, some general opinions about tests. But I haven’t told my “personal story” about testin… Read More
2006-06-07 11:16
You’d like to query JSON document database using SQL-like syntax? Couchbase has N1QL for you. N1QL is a declarative query language that extends SQL for JSON. You can query data via nat… Read More
2006-06-07 11:16
Java has come a long way. A very long way. And it carries with it all the “junk” from early day design decisions. One thing that has been regretted time and again is the fact tha… Read More
2006-06-07 11:16
AppDynamics provides visibility into applications and business transactions made out of multiple smaller decoupled (micro) services deployed in a Docker environment using the Docker monitori… Read More
2006-06-07 11:16
In the past, I have talked about RandomAccessFile and how it can be used for doing faster IO in Java, and in this Java NIO tutorial, we are going to see how to use read/write data from using… Read More
2006-06-07 11:16
This post describes how to use NFC in Android to write smart tags. Android smartphones are capable not only to read NFC tags that contains data like URL, phone numbers and so on but using An… Read More
2006-06-07 11:16
Last year I had the opportunity to work with lots of cool tools and technologies. A couple of those were go, slack and docker. We pretty much use slack for all our communication, and are slo… Read More
2006-06-07 11:16
What does the future hold for sun.misc.Unsafe? With 2015 having just drawn to a close, we thought this would be a good opportunity to do a post-mortem of one of the hottest debates within th… Read More
2006-06-07 11:16
The series continues. After the initial overview and Arjan’s post about the most important backend features, I am now very happy to have Ed Burns (@edburns) finish the series with his… Read More
2006-06-07 11:16
JavaOne 2015 saw a series of talks by the Project Jigsaw team about modularity in Java 9. They are all very interesting and full of valuable information and I urge every Java developer to wa… Read More
2006-06-07 11:16
In response to my recent post Discovering a Trove of Java Primitives Collection Handling on the GNU Trove library, TheAlchemist pointed out some advantages of fastutil over trove: “I m… Read More
2006-06-07 11:16
Today we are excited to announce that Apache Drill 1.4 is now available on the MapR Distribution. Drill 1.4 is a production-ready and supported version on MapR and can be downloaded from her… Read More
2006-06-07 11:16
From the first days I have worked as software engineer, I always hear the same request by many sides: “We want to have everything configurable, we want to change everything on runtime… Read More
2006-06-07 11:16
Jenkins (forked from Hudson after a dispute with Oracle) has been around for a long time and established itself as the leading platform for the creation of continuous integration (CI) and co… Read More
2006-06-07 11:16
As software developers, we all have our favorite tools for making us successful. Many are perfect for the job when getting started but are soon outgrown. Others require too much setup and tr… Read More
2006-06-07 11:16
Making the decision to leave an employer and submitting a resignation is typically an emotional experience, and can be stressful the first few times one goes through the process. Valuable bu… Read More
2006-06-07 11:16
We’re very happy to continue our a guest post series on the jOOQ blog by Manuel Bernhardt. In this blog series, Manuel will explain the motivation behind so-called reactive technologie… Read More
2006-06-07 11:16
I am a great admirer of Solomon Hykes, whose company dotCloud seed financed by Trinity Ventures, went south and was on the verge being sold for peanuts. Then Solomon and close collaborators… Read More
2006-06-07 11:16
Someone once said “if you can’t measure something, you can’t understand it.” Another version of this belief says: “If you can’t measure it, it doesn&rsquo&hell…Read More
2006-06-07 11:16
Let’s have some fun. It’s the start of a new year — we’re on the threshold of something new — so let’s look forward to what you’re likely to be doin… Read More
2006-06-07 11:16
I’ve found myself using a pattern quite often recently, which I’ve been calling “git stash driven development” – that is, relying heavily on the magic of g… Read More
2006-06-07 11:16
Merry Christmas, to everyone! Despite of holidays, I’ve found bunch of tweets, which you would probably like to read or comment. If no, just tweet better than authors of current releas… Read More
2006-06-07 11:16
Everybody is talking microservices these days and Red Hat is doing some very cool developer events around the world. The latest one happened at the beginning of November last year. The amazi… Read More
2006-06-07 11:16
If you search for a description of what Page Object is, you’ll find that The Page Object Pattern gives us a common sense way to model content in a reusable and maintainable way. And al… Read More
2006-06-07 11:16
JavaOne 2015 saw a series of talks by the Project Jigsaw team about modularity in Java 9. They are all very interesting and full of valuable information and I urge every Java developer… Read More
2006-06-07 11:16
Hello everyone! It’s 10th release of #GeekListener digest. You probably noticed that last week there wasn’t any #GeekListener activity. That’s because New Year and Christma… Read More
2006-06-07 11:16
A few months ago I wrote a piece in defence of monoliths and then gave a talk about it. Overall, one should not jump to microservices, because the overhead and risk are much higher than any… Read More
2006-06-07 11:16
I believe that the key to build a successful project with great time-to-market is first to understand the business requirements. Many developers have their first tendency to think … Read More
2006-06-07 11:16
Recently I needed a image in my iOS app that was oscillating. I ran into an example of Swift code that showed how to do it and it was actually quite easy to do (for the theory behind the for… Read More
2006-06-07 11:16
I love open-source: for me it is great way to develop any product, to acquire new skills, to have fun and to make something useful for the community. I am not an open-source rock-star (at le… Read More
2006-06-07 11:16
Sometimes, when we get pull requests for jOOQ or our other libraries, people change the code in our unit tests to be more “idiomatic JUnit”. In particular, this means that they t… Read More
2006-06-07 11:16
There were many updates released in the Spring Boot 1.3.0 but one of them stood out to me because I was not aware of this before and the state it got to makes it one really useful feature (u… Read More
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