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Tutorial: Writing your own CDI extension

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Today I will show you how to write a CDI extension. CDI provides a easy way for extending the functionality, like adding own scopes, enabling java core classes for extension, using the annotation meta data for augmentation or modification, and much more. In this tutorial we will implement an extension that will inject properties from a property file, as usual ...

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Use Java annotation deprecated the right way

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There is hardly anything more infuriating that seeing a method @Deprecated without a proper documentation. I feel lost. Should I still use the method? Probably that is not the intention of the developer, that is why he/she added the deprecation annotation. Should I use something else? So…. What are the rules using @Deprecated? Rule #1: do Javadoc how not to ...

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Programming Language Job Trends Part 1 – February 2014

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Yes, it is job trends time again! I am changing the list of languages a bit because I wanted to start including more languages. So, we are now up to 3 different posts just for languages. In Part 1, we look at Java, C++, C#, Objective C, and Visual Basic. I have decided to drop the “Traditional” label as most languages ...

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Two Reasons Why Estimates Aren’t Worth It

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When potential customers contact us, the odds are that they want to know two things: How much does it cost to implement the application? How long it will take to implement the application? The honest answer to both of these questions is: We have no idea. Needless to say, if we give this answer to potential customers, the odds are ...

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Automating the Release of Java Artifacts Using Jenkins on Window

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This post will show how to automate the release process of a Java Web Application (Student Enrollment Application developed using MYSQL DB with Hibernate ORM in a REST based Jersey2 Spring environment) using Jenkins Continuous Integration – upload the release artifacts to release repository. The job configured using this post must be run only after uploading the snapshot artifacts into ...

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Implementing Jersey 2 Spring integration

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Jersey is the excellent Java JAX-RS specification reference implementation from Oracle. Last year, when we were starting to build RESTful backend web services for a high-volume website, we chose to use the JAX-RS API as our REST framework and Spring framework for dependency injection. Jersey was our JAX-RS implementation of choice. When the project was started JAX-RS API 2.0 specification ...

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MapReduce Algorithms – Understanding Data Joins Part II

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It’s been awhile since I last posted, and like last time I took a big break, I was taking some classes on Coursera. This time it was Functional Programming Principals in Scala and Principles of Reactive Programming. I found both of them to be great courses and would recommend taking either one if you have the time. In this post ...

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Mockito Templates for Eclipse

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Sometimes I miss the forest for the trees – and that for a disturbingly long time. I just became aware of this once again recently, typing one of the more verbose mockito expressions for the umpteenth time. The statement in question was a doAnswer(Answer) construct which always feels a bit cumbersome to code with the static import and generics stuff ...

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Applying aspect oriented programming

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1.Introduction The main target of the aspect oriented programming is the separation of cross-cutting concerns. When we talk about cross-cutting concerns we are referring to generic functionality that is used in several places in our system or application. These concepts are, among others:         Logging Transaction management Error handling Monitoring Security The way to achieve this separation ...

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