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Scalable I/O: Events- Vs Multithreading-based

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Everything begins with a refresher reading of my fundamental papers – yes, I use a set of papers and books as reference material. This paper is titled: “Why Events Are A Bad Idea (for high-concurrency servers)“, by Rob von Behren at the time of writing a PhD fellow at Berkeley [18]. Von Behren opens with: “Event-based programming has been highly touted ...

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Simple Event Driven design

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Overview Developers often ask about the performance or efficiency of a system or their code. What does this really mean? My code is so efficient, only a coding god could understand how it works. My code is really clever but unmaintainable. The next developer will re-write it anyway. My code is really efficient for the machine, but inefficient for the ...

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2 Android Studio productivity tips you MUST know

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This post will handle frequent tasks one usually do in Android Studio: Modifying layout XML files Observing logcat output If you do that actions, make sure you aware of the below tips. Modifying layout XML files When modifying XML layout files, one has to decide the ultimate decision: Which view to use – Design or Text view? Design view provides you a good visual presentation ...

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Converting Markdown to PDF or DOCX with Pandoc

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Markdown is a popular text formatting syntax among developers these days. Popular Sites like Github or Bitbucket use Markdown for project documentation and various other types of user generated content. These sites automatically convert markdown syntax to HTML, so it can be displayed in a browser. However, maybe you want to use Markdown as document format without using a platform ...

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Don’t Hate The HATEOAS

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Or How I Learned to Stop Worrying and Love the HATEOAS REST has become the defacto, or at least vogue, solution to implementing web services. This is understandable because REST offers a level of self-documentation in its utilization of the HTTP specification. It’s durable, scalable, and offers several other desirable characteristics. However many so-called RESTful services don’t implement HATEOAS (Hypermedia ...

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jcmd: One JDK Command-Line Tool to Rule Them All

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I have referenced the handy JDK tool jcmd in several posts in the past, but focus exclusively on its usefulness here like I have previously done for jps. The jcmd tool was introduced with Oracle’s Java 7 and is particularly useful in troubleshooting issues with JVM applications by using it to identify Java processes’ IDs (akin to jps), acquiring heap ...

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Java Tip of the Week #7 – Maven Slow?

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This week Java Tip of the Week is a follow up of last session about Maven. The first video covered aspects related to Maven Dependencies. This video will cover some techniques to speed up your Maven build. Maven Slow? Since Maven 3, you are able to run your builds in parallel. Depending on the build machine and the project structure, ...

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Configure multiple View Resolvers in Spring

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1. Introduction In Spring, the View Resolver is provided to resolve the view with the data available in the model, without tightly binding to a View technology, be it JSP, Velocity or Thymeleaf. Spring makes it easy and flexible to configure one or multiple View Resolvers, as per the need would be. 2. Spring MVC application flow Before we proceed with understanding how ...

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Couchbase on Kubernetes

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This blog is possible because of this tweet! Had a great #Couchbase #Kubernetes hacking session with @saturnism, learned a lot, look forward to some nice blogs. — Arun Gupta (@arungupta) February 27, 2016 Kubernetes is an open source orchestration system by Google for Docker containers.  It manages containerized applications across multiple hosts and provides basic mechanisms for deployment, maintenance, and scaling of applications. It allows the ...

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Pitfalls of the MyBatis Caches with Apache Ignite

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A week ago, MyBatis and Apache ignite announced of support apache ignite as a MyBatis cache (L2 cache). technically MyBatis support two levels of Caches: Local cache, which is always enable by default L2 cache, optional As Apache Ignite project is fast growing with it’s various functionality, in this blog post we are going to examine the MyBatis support in ...

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