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Akka Notes – Actor Messaging – Request and Response – 3

Last time when we saw Actor messaging, we saw how fire-n-forget messages are sent (Meaning, we just send a message to the Actor but don’t expect a response from the Actor). Technically, ...
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Project Lifecycle in Teamed.io

In addition to being a hands-on programmer, I’m also co-founder and CTO of Teamed.io, a custom software development company. I play the role of a technical and management leader ...
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Control Sphero using Temperature Sensor in Android

One of the most interesting topic around Android it is how we can connect our smart phones to other devices or smart devices to get information from them or to control them. In this ...
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Stateless Spring Security Part 1: Stateless CSRF protection

Today with a RESTful architecture becoming more and more standard it might be worthwhile to spend some time rethinking your current security approaches. Within this small series of ...
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The future is Micro Service Architectures on Apache Karaf

This is a guest blog post by Jamie Goodyear (blog, @icbts). He is an open source advocate, Apache developer, and computer systems analyst with Savoir Technologies; he has designed, ...
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Identity Anti-patterns: Federation Silos and Spaghetti Identity

A recent research done by the analyst firm Quocirca confirms that many businesses now have more external users than internal ones: in Europe 58 percent transact directly with users ...
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DI Containers are Code Polluters

While dependency injection (aka, “DI”) is a natural technique of composing objects in OOP (known long before the term was introduced by Martin Fowler), Spring IoC, Google ...
java-interview-questions-answers

JPA Tutorial: Mapping Entities – Part 2

In my last post I showed a simple way of persisting an entity. I explained the default approach that JPA uses to determine the default table for an entity. Let’s assume that we want ...
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Logical vs physical clock optimistic locking

Introduction In my previous post I demonstrated why optimistic locking is the only viable solution for application-level transactions. Optimistic locking requires a version column that ...
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Six Tips for Interviewing Scrum Masters, Part 2

Now that you know what you expect from your Scrum Master’s job (the deliverables), and you know the essential and desirable skills (the first three tips), you can focus on creating ...
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