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Performance tests for slow networks with tc


tl;dr: you can easily replicate slow network conditions which makes it easier to performance test them. Smartphones have made both mobile websites and apps that have to connect in mobile situations a lot more common. There’s also a lot of value to be had in servicing these kind of customers and in recent years we’ve arrived at the stage where ...

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The Pokayoke Software Development Guide


Aaron Swartz has written up a guide for software development from idea to launch. He calls it “The Pokayoke Guide to Developing Software”. I was unfamiliar with the word “Pokayoke”, but it means mistake-proofing, i.e., “eliminate product defects by preventing, correcting, or drawing attention to human errors as they occur”. Developing software from zero to use by actual customers is ...

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Maintaining Software Sucks – and what we can do about it


If you ask most developers, they will tell you that working in maintenance sucks. Understanding and fixing somebody else’s lousy code is hard. It’s tedious. And it’s frustrating – because you know you would do a better job if you were given the chance to do it over and do it right. I enjoy maintaining code I’ve built. It’s my ...

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Java Exception Handling Tutorial with Examples and Best Practices


Exception is an error event that can happen during the execution of a program and disrupts its normal flow. Java provides a robust and object oriented way to handle exception scenarios, known as Java Exception Handling. We will look into following topics in this tutorial.               Java Exception Handling Overview Exception Handling Keywords Exception ...

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How to create Thread Pools using Java 5 Executor Framework


Java 5 introduced Thread pool in Java in form of Executor framework, which allows Java programmer to decouple submission of task to execution of task. If you are doing server side programming in Java than Thread pool is an important concept to maintain scalability, robustness and stability of system. For those, who are not familiar with thread pool in Java ...

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Introducing Android Migrations


Have you ever worked with Rails’ migrations? They make database changes a breeze, don’t they? While every software release doesn’t necessarily involve a migration, when one does happen to make use of one, I’m always pleased on how easily things work out. Whether it’s to add new data or alter existing data structures, Rails migrations make evolving a datastore (be ...

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Immutable Servers With Packer and Puppet


Lately I’ve been becoming more and more of a fan of is the concept of Immutable Servers while automating our infrastructure at Zapier. The concept is simple: never do server upgrades or changes on live servers, instead just build out new servers with applied updates and throw away the old ones. You basically get all the benefits of immutability in ...

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The NoSQL moniker that was coined circa 2009 marked a move from the “traditional” relational model. There were quite a few non-relational databases around prior to 2009, but in the last few years we’ve seen an explosion of new offerings (you can see,for example, the “NoSQL landscape” in a previous post I made). Generally speaking, and everything here is a wild ...

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Building a Manufacturing Service Bus (MSB) with WSO2 ESB


Before getting in to the subject, I would like to introduce few terminology commonly used in the manufacturing industry. The term Manufacturing Execution System (MES) was coined by AMR Research in 1990, the MES concept has evolved for almost three decades from the development of advanced, computer information systems for manufacturing. Following is the definition on an MES from the ...

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