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How to configure and install ZeroMQ (libsodium) on CentOS 6.7?


When getting started on ZeroMQ (version 4.2.0 or above) can be quite challenging especially with all the prerequisites. I’ve spent a good two days to get the process ironed out. So I’m sharing this so that others can avoid the same pitfalls and can have a good head-start with setting up their environment. Pitfall #1 Develop for your platform. I’m ...

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A paranoid’s guide to backing up a working folder


Oops time Leanpub supports multiple storage engines and a private GitHub repository is probably the safest way to the backing up your working folder. I chose Dropbox as I didn’t envision anything wrong with the automatic synchronization mechanism. While working on my book, I accidentally managed to wipe-out half of my diagrams and all changes were instantly synchronized by Dropbox. ...

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Takipi 2.0: Trends and DevOps Integrations


Visualize all log events and exceptions in production directly from your JVMs – Send as metrics into more than 20 graphing and alerting tools. We wanted to share two major features we’re introducing that we thought worth sharing – Trends and DevOps Integrations. We began building Takipi because we were tired of using traditional logs to understand what was going inside of our ...

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The Latest Twist in the Java IDE Wars: Subscription-based IntelliJ IDEA


I’ve been watching with some interest the discussion surrounding this past week’s announcement that JetBrains is moving to an Adobe-like and Microsoft Office-like software subscription licensing model. The feedback has been fast and furious and JetBrains has responded with a very brief follow-up post We are listening that is entirely reproduced in this quote: “We announced a new subscription licensing ...

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Jenkins setups for Kubernetes and Docker Workflow


Intro During the summer I had the chance to play a little bit with Jenkins inside Kubernetes. More specifically I wanted to see what’s the best way to get the Docker Workflow Plugin running. So, the idea was to have a Pod running Jenkins and use it to run builds that are defined using Docker Workflow Plugin.  After a lot of ...

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HTTP/2 – Powered by SPDY (speedy) and inspired by evolutionary web


While driving back home, I was listening to Mark Nottingham’s (who chairs IETF HTTP working group) podcast on HTTP/2 and it was very interesting to know about the upcoming changes in HTTP protocol. Post that I did some research and sharing some interesting findings with respect to HTTP/2. It’s been a long time the backbone of Internet, HTTP has not ...

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Yet Another Report Generator?


If you have experience of business application development, then most likely you will have encountered a requirement for the application to have a flexible reporting mechanism. The company I work for is mainly focused on developing business solutions and reporting is an essential, indeed, must have aspect of all the enterprise systems we develop. To enable flexible reporting in our ...

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Java EE 8 MVC: Getting started with Ozark


About a year ago a new action based MVC framework, simply called MVC, was announced for Java EE 8. MVC (specified in JSR 371) is based on JAX-RS and integrates with Java EE technologies like CDI and Bean Validation. The reference implementation for MVC 1.0 is Ozark. This is the first article of a multi-part tutorial I am planning to ...

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An Unexpected Allocation – JIT Compilation Jitter


Whilst working on ByteWatcher (see my last post) I came across something rather strange. This is the actual code snippet used to find out how much allocation there has been on a particular thread: return (long) mBeanServer.invoke( name, GET_THREAD_ALLOCATED_BYTES, PARAMS, SIGNATURE ); For the full context see here. (The way ByteWatcher works is to call this method periodically to monitor allocation.) One ...

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Squeezing data into the data structure


This story is about a capacity optimization task that we recently carried out at Plumbr. It all started with an innocent-looking requirement being added to the existing mix. As you might know, Plumbr monitoring solution is distributed as a Java Agent which connects to a Server. The small addition required to keep track of all the connected Agents over time so ...

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