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Building Apache Zeppelin for MapR using Spark under YARN


Apache Zeppelin is a web-based notebook that enables interactive data analytics. You can make beautiful data-driven, interactive and collaborative documents with Spark SQL, Scala, Hive, Flink, Kylin and more. Zeppelin enables rapid development of Spark and Hadoop workflows with simple, easy visualizations. The code from Zeppelin can be used in the Zeppelin notebooks or compiled and packaged into complete applications. ...

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Utilizing the Simplicity of Go for Easy Development


The Go language is a really great fit for the increasingly popular service-orientated architecture. In the last few years, many good practices have emerged to help with the problems that come with microservices. These practices are important if you don’t want to end up with a hard-to-maintain, hard-to-operate infrastructure. By combining them with some of the more overlooked features of ...

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GeekListener v.3


Hey there! It’s time for #GeekListener v.3. The last week was poor to good tweets. It’s very strange because so many events occurred. Devoxx Belgium and Morocco are finished, Spring Boot 1.3 released, TypeSafe Monitor 1.0 and many other thins. But let’s try to look at all of this through the prism of tweets. So Nick De Cooman starts our ...

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Should Oracle Spring Clean JavaFX?


We really depend on JavaFX at Codename One, our simulator needs it. Our desktop build uses it and our designer tool is based on Swing. We want it to succeed, its important to our business! We are not alone, even if you are a Java EE developer and don’t care about desktop programming, keep in mind the fact that today’s ...

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Introduction in Java TDD – part 1


Welcome to an introduction in Test Driven Development (TDD) series. We will talk about Java and JUnit in context of TDD, but these are just tools. The main aim of the article is to give you comprehensive understanding of TDD regardless of programming language and testing framework. If you don’t use TDD in your project you are either lazy or ...

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HTTP/2 With JBoss EAP 7


Just a couple of days ago, the new JBoss EAP 7 ALPHA version was released.  And I already blogged about how to get started with it. One very interesting part is the HTTP/2 support which has been added as a technical preview. It is provided by the new webserver Untertow.  HTTP/2 reduces latency by compressing headers and multiplexing many streams over ...

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Enterprise Spring examples and integration tests


There was longer gap in my blog, because I was busy writing book Pivotal Certified Spring Enterprise Integration Specialist Exam – A Study Guide. This book is example heavy. Fortunately Apress agreed to open source all these examples. Therefore there is quite extensive collection of Spring examples available in this GitHub repository. Altogether  146 Spring examples with integration tests. Most of ...

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How view parameters are obtained/attached from/to the URL query string (examples) ?


Let’s dissect several simple use cases and see how view parameters works (view parameters names are not mandatory to match the request parameters passed via URL query string, but in this post we will focus on this case): CASE 1 In index.xhtml page we have: <f:metadata> <f:viewParam name="playernameparam" value="#{playersBean.playerName}"/> <f:viewParam name="playersurnameparam" value="#{playersBean.playerSurname}"/> </f:metadata> ... <h:form> Enter name:<h:inputText value="#{playersBean.playerName}"/> Enter surname:<h:inputText ...

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Testing AKKA application with Spock


AKKA is message-driven and actor model based concurrency toolkit. Although it’s written in Scala, AKKA can be used in any JVM based language project. This post tries to fill the gap of missing information about writing good tests in polyglot JVM projects that leverage AKKA framework. In multi language JVM projects my obvious choice of testing tool is Spock. Powered ...

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