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How to add an IntelliJ project to GitHub


Although the GitHub docs contains good info on how to add an existing GitHub project to your local machine, how to add an existing (unversioned) project from your local machine to GitHub was a little less clear to me. Here are the steps I use. From IntelliJ Select ‘VCS’ menu -> Import in Version Control -> Share project on GitHub. ...

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Apache Hadoop 2.4.0


The Apache community has voted to release Apache Hadoop 2.4.0, so the new release is now available and consists of important improvements. The improvements are related not only to HDFS but also to MapReduce. The important improvement in HDFS is about NameNodes. Multiple independent Namenodes and Namespaces are now used that do not require coordination with each other. Datanodes are ...

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Circuit Breaker Pattern in Apache Camel


Camel is very often used in distributed environments for accessing remote resources. Remote services may fail for various reasons and periods. For services that are temporarily unavailable and recoverable after short period of time, a retry strategy may help. But some services can fail or hang for longer period of time making the calling application unresponsive and slow. A good ...

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10 Books Every Java Developer Should Read


I have read my share of software development books and I have noticed that it is very rare to find a book which I want to read more than once. However, once in a while I find a book which teaches me new things every time when I read it. This blog post is a tribute to these rare gems. ...

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Using ActiveMQ – “Master/Slave” configuration with failover protocol


Introduction ActiveMQ broker(s) tends to be a core piece of messaging infrastructure in an enterprise. It is vital for this messaging infrastructure to be highly available and scalable. Please read this link in order to learn more about creating network of brokers to support various use cases. One of the popular use case for ActiveMQ is the Master/Slave configuration with ...

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Temp, Store and Memory Percent Usage in ActiveMQ


In order to effectively use ActiveMQ, it is very important to understand how ActiveMQ manages memory and disk resources to handle non-persistent and persistent messages. ActiveMQ has three key parameters which need to be kept under check. Temp Percent Usage This is the % of assigned disk storage that has been used up to spool non-persistent messages Non persistent messages ...

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Java 8 Friday: No More Need for ORMs


At Data Geekery, we love Java. And as we’re really into jOOQ’s fluent API and query DSL, we’re absolutely thrilled about what Java 8 will bring to our ecosystem. Java 8 Friday Every Friday, we’re showing you a couple of nice new tutorial-style Java 8 features, which take advantage of lambda expressions, extension methods, and other great stuff. You’ll find ...

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Design Your Agile Project, Part 3


What do you do  for geographically distributed teams, if you want to move to agile? First question: does the team want to move to agile? Or, does the management want to move to agile? I am serious. I might take the same actions, but for different different reasons. In either case, the team needs to learn about what agile and ...

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How to Level Up


I regularly hear from and read about technologists in a career rut. Unless one is both lucky and adept at predicting the future, experiencing some temporary stall can happen to professionals at any career stage. It may be the feeling of being stuck in an unchallenging role, feeling burdened by an undesirable skill set, or trapped in a company that seems difficult to escape. Career stagnation in technology could be defined as a prolonged ...

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Open Source Completely Underestimates Contributor License Agreements


Reddit’s /r/ProgrammerHumor has recently treated us to this politically incorrect and quite childish little Open Source rant                 Obviously, like most “discussions” on reddit and specifically those discussions about Open Source, things got quickly very serious with people referring to Richard Stallman and how these critiques are childish and immature and what’s-wrong-with-our-industry™ etc. ...

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