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1. JPA Mini Book

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The Cloud Winners and Losers?

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The cloud is revolutionising IT. However there are two sides to every story: the winners and the losers. Who are they going to be and why? If you can’t wait here are the losers: HP, Oracle, Dell, SAP, RedHat, Infosys, VMWare, EMC, Cisco, etc. Survivors: IBM, Accenture, Intel, Apple, etc. Winners: Amazon, Salesforce, Google, CSC, Workday, Canonical, Metaswitch, Microsoft, ARM, ...

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Easy REST endpoints with Apache Camel 2.14

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Apache Camel has a new release recently, and some of the new features were blogged about by my colleague Claus Ibsen. You really should check out his blog entry and dig into more detail, but one of the features I was looking forward to trying was the new REST DSL. So what is this new DSL? Actually, it’s an extension ...

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Validate Configuration on Startup

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Do you remember that time when you spent a whole day trying to fix a problem, only to realize that you have mistyped a configuration setting? Yes. And it was not just one time. Avoiding that is not trivial, as not only you, but also the frameworks that you use should take care. But let me outline my suggestion. Always ...

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Java Minor Releases Scheme Tweaked Again

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In 2013, Oracle announced the Java SE – Change in Version Numbering Scheme. The announcement stated that Limited Update releases (those “that include new functionality and non-security fixes”) and Critical Patch Updates (CPUs) [those “that only include fixes for security vulnerabilities”] would be released with specific version number schemes. In particular, Limited Use Releases would have version numbers with multiples ...

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How to use Hibernate to generate a DDL script from your Play! Framework project

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Ok, so you have been using the hiber­nate prop­erty name=“hibernate.hbm2ddl.auto” value=“update” to con­tin­u­ously update your data­base schema, but now you need a com­plete DDL script? Use this method from you Global Class onStart to export the DDL scripts.  Just give it the pack­age name (with path) of your Enti­ties as well as a file name: public void onStart(Application app) { exportDatabaseSchema("models", ...

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Eclipse Extension Point Evaluation Made Easy

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Coding Eclipse Extension Point evaluations comes in a bit verbose and sparsely self-explaining. As I got round to busy myself with this topic recently, I wrote a little helper with the intent to reduce boilerplate code for common programming steps, while increasing development guidance and readability at the same time. It turned out to be not that easy to find ...

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Microservices

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A microservice is a small, focussed piece of software that can be developed, deployed and upgraded independently. Commonly, it exposes it functionality via a synchronous protocol such as HTTP/REST. That is my understanding of microservices, at least. There is no hard definition of what they are, but they currently seem to be the cool kid on the block, attracting increasing attention ...

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Typesafe APIs for the browser

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A new feature in Ceylon 1.1, that I’ve not blogged about before, is dynamic interfaces. This was something that Enrique and I worked on together with Corbin Uselton, one of our GSoC students. Ordinarily, when we interact with JavaScript objects, we do it from within a dynamic block, where Ceylon’s usual scrupulous typechecking is suppressed. The problem with this approach ...

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Spring @Configuration – RabbitMQ connectivity

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I have been playing around with converting an application that I have to use Spring @Configuration mechanism to configure connectivity to RabbitMQ – originally I had the configuration described using an xml bean definition file. So this was my original configuration:             <beans ...;> <context:property-placeholder/> <rabbit:connection-factory id="rabbitConnectionFactory" username="${rabbit.user}" host="localhost" password="${rabbit.pass}" port="5672"/> <rabbit:template id="amqpTemplate" connection-factory="rabbitConnectionFactory" exchange="rmq.rube.exchange" ...

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NetBeans 8.0’s Five New Performance Hints

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NetBeans 8.0 introduces several new Java hints. Although there are a large number of these new hints related to Java Persistence API, I focus on five new hints in the Performance category. The five new “Performance Hints” introduced with NetBeans 8.0 are:             Boxing of already boxed value Redundant String.toString() Replace StringBuffer/StringBuilder by String Unnecessary ...

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