Home » Author Archives: Buddhika Chamith

Author Archives: Buddhika Chamith

I/O Demystified

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With all the hype on highly scalable server design and the rage behind nodejs I have been meaning to do some focused reading on IO design patterns to which until now couldn’t find enough time to invest. Now having done some research I thought it’s best to jot down stuff I came across as a future reference for me and any one ...

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JMX : Some Introductory Notes

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JMX (Java Management Extensions) is a J2SE technology which enables management and monitoring of Java applications. The basic idea is to implement a set of management objects and register the implementations to a platform server from where these implementations can be invoked either locally or remotely to the JVM using a set of connectors or adapters. A management/instrumentation object is ...

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So you are a programmer…

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Been there. Done that. And suffered for that… Programming is fun. But there are some other associated stuff we programmers blissfully skip or procrastinate because they are not so cool. End result?… Somebody is going to get hurt at the end of the day and that somebody may very well be a ourselves. So here are some stuff I have ...

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Learn by Errors : Java + OSGi

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Recently I worked on getting Apache Hive work inside an OSGi environment. While not proving to be a proverbial piece of cake (software right?.. Why am I not surprised? ), it led me through an assortment of Java and OSGi errors. Here I am listing some of them that bit me bit hard (no pun intended) so that I thought of making a ...

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Joins with Map Reduce

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I have been reading on Join implementations available for Hadoop for past few days. In this post I recap some techniques I learnt during the process. The joins can be done at both Map side and Join side according to the nature of data sets of to be joined. Reduce Side Join Let’s take the following tables containing employee and ...

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Monitoring : Making sense of the buzz word jungle

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Nowadays we are constantly reminded of the virtues of being proactive or more colloquially put “Being one step ahead of the game” when it comes to handling our businesses whether it be a SME or a multi-national cooperation. Quickly detecting or in some cases even predicting, trends in activities originating within and outside the organization and streamlining business activities accordingly ...

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SSH Tunneling Explained

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Recently I wanted to set up a remote desktop sharing session from home pc to my laptop. While going through the set up guide I came across ssh tunneling. Even though there are many articles on the subject still it took me a considerable amount of googling, some experimenting and couple of Wireshark sessions to grasp what’s going under the ...

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Apache Thrift Quickstart Tutorial

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Thrift is a cross language RPC framework initially developed at Facebook, now open sourced as an Apache project. This post will describe how to write a thrift service and client in different modes such as blocking, non blocking and asynchronous. (I felt latter two modes are less documented and needed some tutorial type introduction, hence the motivation of this post). ...

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