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SBT AutoPlugins Tutorial

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This tutorial will guide you through the process of writing your own sbt plugin. There are several reasons to do this and it’s really simple:                   Add customized build steps to your continuous integration process Provide default settings for different environments for various projects Before you start, make sure to have sbt ...

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Hibernate collections optimistic locking

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Introduction Hibernate provides an optimistic locking mechanism to prevent lost updates even for long-conversations. In conjunction with an entity storage, spanning over multiple user requests (extended persistence context or detached entities) Hibernate can guarantee application-level repeatable-reads. The dirty checking mechanism detects entity state changes and increments the entity version. While basic property changes are always taken into consideration, Hibernate collections ...

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Spring Caching abstraction and Google Guava Cache

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Spring provides a great out of the box support for caching expensive method calls. The caching abstraction is covered in a great detail here. My objective here is to cover one of the newer cache implementations that Spring now provides with 4.0+ version of the framework – using Google Guava Cache In brief, consider a service which has a few ...

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Tomcat to Wildfly: Configuring Database connectivity

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This excerpt has been taken from the “From Tomcat to WildFly” book in which you’ll learn how to port your existing Tomcat architectures to WildFly, including both the server configuration and the applications running on the top of it. WildFly is a fully compliant Java Enterprise Edition 7 container with a much wider set of available services and options compared ...

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A RESTful JDBC HTTP Server built on top of jOOQ

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The jOOQ ecosystem and community is continually growing. We’re personally always thrilled to see other Open Source projects built on top of jOOQ. Today, we’re very happy to introduce you to a very interesting approach at combining REST and RDBMS by Björn Harrtell. Björn Harrtell is a swedish programmer since childhood. He is usually busy writing GIS systems and integrations ...

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JavaFX Tip 15: ListView Autoscrolling

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I recently had to implement autoscrolling functionality for FlexGanttFX and thought that my solution might be useful for others. You find the basic concepts of it in the listing below. The main idea is that a background thread is used to adjust the pixel location of the virtual flow node used by the list view. The thread starts when a drag ...

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How Visi uses Weave and Docker

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I’ve gotten a bunch of questions about how Visi, the simple web front end to Spark works. This blog post is an overview. Hosted Spark with a Simple Front End Visi is a hosted Spark cluster with a simple web-based front end that allows Excel-savvy folks to enter formulas that get turned into Spark jobs. The Spark cluster and front ...

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