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ADF : Dynamic View Object

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Today I want to write about dynamic view object which allow me to change its data source (SQL query) and attributes at run time. I will use oracle.jbo.ApplicationModule :: createViewObjectFromQueryStmt method to do this issue. I will present how to do this step by step Create View Object and Application Module   1- Right click on Model project and choose ...

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Mahout and Scalding for poker collusion detection

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When I’ve been reading a very bright book on Mahout, Mahout In Action (which is a great hands-in intro to machine learning, as well), one of the examples has caught my attention. Authors of the book where using well-known K-means clusterization algorithm for finding similar players on stackoverflow.com, where the criterion of similarity was the set of the authors of ...

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Hibernate caches basics

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Recently I have experimented with hibernate cache. In this post I would like share my experience and point out some of the details of Hibernate Second Level Cache. On the way I will direct you to some articles that helped me implement the cache. Let’s get started from the ground. Caching in hibernate Caching functionality is designed to reduces the ...

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Java threads: How many should I create

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Introduction “How many threads should I create?”. Many years before one of my friends asked me the question, then I gave him the answer follow the guideline with ” Number of CPU core + 1″. Most of you will be nodding when you are reading here. Unfortunately all of us are wrong at that point. Right now I would give ...

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How Employers Measure Passion in Software Engineering Candidates

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Over the past few months I have had some exchanges with small company executives and hiring managers which have opened my eyes to what I consider a relatively new wrinkle in the software development hiring world. I have been recruiting software engineers for 14 years, and I don’t recall another time where I’ve observed this at the same level. Here ...

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Spring JDBC Database connection pool setup

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Setting up JDBC Database Connection Pool in Spring framework is easy for any Java application, just matter of changing few configuration in spring configuration file.If you are writing core java application and not running on any web or application server like Tomcat or Weblogic, Managing Database connection pool using Apache Commons DBCP and Commons Pool along-with Spring framework is nice ...

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Spring Profiles in XML Config Files

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My last blog was very simple as it covered my painless upgrade from Spring 3.0.x to Spring 3.1.x and I finished by mentioning that you can upgrade your Spring schemas to 3.1 to allow you to take advantage of Spring’s newest features. In today’s blog, I’m going to cover one of the coolest of these features: Spring profiles. But, before ...

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I/O Demystified

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With all the hype on highly scalable server design and the rage behind nodejs I have been meaning to do some focused reading on IO design patterns to which until now couldn’t find enough time to invest. Now having done some research I thought it’s best to jot down stuff I came across as a future reference for me and any one ...

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