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Beginner’s Guide to Hazelcast Part 6

This is the sixth post in a series of posts about Hazelcast.  If one has not read the last five, please go to the table of contents post I have created to catch up. Native Clients After the last post I decided that I am going to go native.  Yep, I am going to demonstrate Hazelcast’s own Java client.  Java ...

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Fault Tolerance in Go

In distributed systems, failure is inevitable. Eventually, some service will become bogged down and consequently won’t respond quickly enough or, worse, a service will simply die. Services relying on a degraded (or dead!) service will naturally become affected and potentially cascade instability throughout the system, unless all services are properly built with isolation and in mind. Netflix experienced the vexation ...

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EE JSP: Generating Dynamic Content with JSTL Tag Libraries


Besides writing your own Custom Tags in JSP, you will find that Java EE actually provides a set of Java Standard Tag Library (JSTL) ready for you to use. These built-in tags include repeating (for-loop) tags, if condition tags, variable declaration and output tags etc. The Libraries also come with many utility functions and international message formatting tags. Here is ...

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Making Your Boss Happy Is a False Objective

We all have bosses. We also have customers who pay us for running their software projects. They are my bosses for the time of the contract. I’m also acting as a boss for developers who are working for It is obvious that a good employee/contractor is one who makes his boss/customer happy. But only a bad employee works toward ...

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XSL Transformation in Java: An Easy Way

XSL transformation (XSLT) is a powerful mechanism for converting one XML document into another. However, in Java, XML manipulations are rather verbose and complex. Even for a simple XSL transformation, you have to write a few dozen lines of code — and maybe even more than that if proper exception handling and logging is needed. jcabi-xml is a small open ...

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How to Cut Corners and Stay Cool

You have a task assigned to you, and you don’t like it. You are simply not in the mood. You don’t know how to fix that damn bug. You have no idea how that bloody module was designed, and you don’t know how it works. But you have to fix the issue, which was reported by someone who has no ...

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Sneak peek into the JCache API (JSR 107)


This post covers the JCache API at a high level and provides a teaser – just enough for you to (hopefully) start itching about it ;-) In this post …. JCache overview JCache API, implementations Supported (Java) platforms for JCache API Quick look at Oracle Coherence Fun stuff – Project Headlands (RESTified JCache by Adam Bien) , JCache related talks ...

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The New Agile–Picking A Winner

We’ve talked about scaling and methodology on how to build stuff, but hey, we want to know what to build, dammit! Unfortunately, SAFe, scrum, XP, or Lean Startup don’t talk about what we need to build. Just how to get it out the door. Picking a winning product seems like the holy grail. Business analysis and product management methods can ...

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How to secure Openfire XMPP server

Introduction Instant Messaging (IM) or chat is a service used broadly today in many applications like google talk or the more recent google Hangouts, Yahoo! Talk etc. It is based on the Extensible Messaging and Presence Protocol (XMPP) or Jabber protocol. Usually, a client-server architecture is followed, where specially-built XMPP clients exchange XMPP messages with XMPP servers who propagate the ...

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