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1. JPA Mini Book

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Ceylon: Ceylon command-line plugins

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With Ceylon we try our best to make every developer’s life easier. We do this with a great language, a powerful IDE, a wonderful online module repository, but also with an amazing command-line interface (CLI). Our command line is built around the idea of discoverability where you get a single executable called ceylon and lots of subcommands that you can ...

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Write SQL in Java with jOOQ

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jOOQ is a “database first”, type safe SQL API that allows you to write SQL in Java intuitively as if the SQL language were supported natively by the Java compiler. All database schemas, tables, columns, procedures, and other objects are made available as Java objects that can be used directly in the jOOQ SQL API. Let’s see how it works… ...

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Keeping the Meaning with the Bytes

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Back to the Future… This post was from November 2006. I had just started playing with Scala and was trying to figure out an ORM… the one that ultimately became Lift’s Mapper. Keeping the meaning with the bytes One of my criteria for a good web framework is having security and access control built it. As I was driving friends ...

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Legacy Code to Testable Code #6: Add Overload

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This post is part of the “Legacy Code to Testable Code” series. In the series we’ll talk about making refactoring steps before writing tests for legacy code, and how they make our life easier. In the last post, I’ve talked about Extract Class, and that sometimes in order to do that, we might want to change the signature of a ...

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Five Tips for Tactical Management

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Sometimes, you just need to get on with the work. You need to give yourself some breathing room so you can think for a while. Here are some tips that will help you tackle the day-to-day management work:                 Schedule and conduct your one-on-ones. Being a manager means you make room for  the ...

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User sessions, Data controls and AM pooling

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Recently I was asked an interesting question about application module pooling. As we know AM pool contains application module instances referenced by user sessions, which allows a session to fetch exactly the same AM instance from the pool at the subsequent request.               And if there is more than one root application module in ...

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Spring Rest API with Swagger – Creating documentation

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The real key to making your REST API easy to use is good documentation. But even if your documentation is done well, you need to set your company processes right to publish it correctly and on time. Ensuring that stakeholders receive it on time is one thing, but you are also responsible for updates in both the API and documentation. ...

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Clean Unit Test Patterns – Presentation Slides

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I was given the opportunity to talk at the GDG DevFestKarlsruhe 2014 conference about ‘Clean Unit Test Patterns’. Thanks to the organizers for inviting me and thanks to all people listening to my talk. As promised I shared the presentation e.g. for those who want to have a look at the additional slides I did not cover during the talk: ...

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Apache Commons IO Tutorial: A beginner’s guide

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Apache Commons IO is a Java library created and maintained by the Apache Foundation. It provides a multitude of classes that enable developers to do common tasks easily and with much less boiler-plate code, that needs to be written over and over again for every single project.The importance of libraries like that is huge, because they are mature and maintained by ...

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