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Observer Design Pattern in Java – Example Tutorial

Observer pattern is one of the behavioral design pattern. Observer design pattern is useful when you are interested in the state of an object and want to get notified whenever there ...
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Custom Deserializer in Jackson and validation

tl;dr: it is important to add input validation to custom json deserializers in Jackson. In RHQ we make use of Json parsing in a few places – be it directly in the as7/Wildfly ...
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Servlet 3.0 Overview

Servlet 3.0 – has a bunch of ground breaking features that will ultimately change how developers will code and write JEE Web Applications – some might say that its conventions defy ...
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The Purpose of Documentation

When it comes to documentation the Agile Manifesto says: We have come to value working software over comprehensive documentation And I agree. If you can choose between working software ...
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Transactional caching for Camel with Infinispan

Some time ago I created a Redis connector for Camel. Redis is awesome key-value store (and a lot more) but then I needed a cache running in the same JVM as Camel and noticed Infinispan ...
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Iterator Design Pattern in Java – Example Tutorial

Iterator pattern in one of the behavioral pattern and it’s used to provide a standard way to traverse through a group of Objects. Iterator pattern is widely used in Java Collection ...
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Android Custom Grid View Example with Image and Text

Hello Friends, Today I am sharing very simple useful post “Custom Grid View in Android”. All the code are given below just copy paste and enjoy. You can download zip folder ...
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Broken Glass : Diagnosing Production Cassandra Issues

I just past my second year anniversary at Health Market Science (HMS), and we’ve been working with Cassandra for almost the entirety of my career here.   In that time, we have ...
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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 ...
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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”, ...
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