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What is HMAC Authentication and why is it useful?

To start with a little background, then I will outline the options for authentication of HTTP based server APIs with a focus on HMAC and lastly I will provide some tips for developers ...
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Investigating Deadlocks – Part 1

I’m sure we’ve all been there: it’s late, you’re hungry, your server has hung or your application’s running at snail’s pace, and there’s someone breathing down your neck ...
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Locking with a semaphore : An example

Concurrency is one aspect that brings along interesting challenges along with it. If not correctly handled, it brings about race conditions that will baffle people because those issues ...
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Sending Event Invitations With Seam

These days one of my colleagues had problems with sending event invitation using mail templates with seam (version 2.x). In basic this should not be a hard task, so I will in short ...
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Compact Off-Heap Structures/Tuples In Java

In my last post I detailed the implications of the access patterns your code takes to main memory. Since then I’ve had a lot of questions about what can ...
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Should you care about Conway’s Law?

Conway’s Law says that“organizations which design systems (in the broad sense used here) are constrained to produce designs which are copies of the communication structures of ...
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Eclipse refactoring on steroids

In my last post about common Java violations, I listed a set of mistakes that java developers tend to make. While refactoring a Java project with the objective to resolve those violations, ...
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Apache OpenOffice just graduated from the Incubator

Apache OpenOffice has just made it out of the Incubator and is now an official Apache Software Foundation project. “What?”, might some people ask now, “wasn’t it official before ...
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Spring MVC for Atom Feeds

How to add feeds (Atom) to your web application with just two classes? How about Spring MVC? Here are my assumptions:you are using Spring framework you ...
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Generate QR Code image from Java Program

If you are tech and gadget savvy, then you must be aware of QR codes. You will find it everywhere these days – in blogs, websites and even in some public places. This is very popular ...
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