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Introducing EclipseLink JPA-RS

In a previous series of posts I covered how to create a JAX-RS service that leveraged JPA for the persistence layer.  EclipseLink contains a component called JPA-RS that can be used ...
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Java EE CDI ConversationScoped example

In this tutorial we shall show you how to create and use a ConversationScoped Bean in a web application. In CDI, a bean is a source of contextual objects that define application state ...
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Capistrano: Deploying to a Vagrant VM

I’ve been working on a tutorial around thinking through problems in graphs using my football graph and I wanted to deploy it on a local vagrant VM as a stepping stone to deploying ...
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On Java 8′s introduction of Optional

I had recently discovered the JDK 8′s addition of the Optional type. The Optional type is a way to avoid NullPointerException, as API consumers that get Optional return values from ...
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Spring JpaRepository Example (In-Memory)

This post describes a simple Spring JpaRepository example using an in memory HSQL database. The code example is available from GitHub in the Spring-JpaRepository directory. It is based ...
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SuperMan bound by Java Monitors

Its a dark time in the life of Super Man. Jor-El wants him to go on a voyage to prepare him for his ultimate destiny. Yet the Earth is faced with dooms-day and the Justice League needs ...
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How Hadoop Works? HDFS case study

The Apache Hadoop software library is a framework that allows for the distributed processing of large data sets across clusters of computers using simple programming models. It is designed ...
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Install, setup and start MongoDB on Windows

This post will provide the full path from downloading required binary archive/package for particular Windows version to starting up MongoDB in various ways. Following are the high ...
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There is no application server

We have recently posted data about application server market share we gathered from the free Plumbr deployments. And it resonated well – via different channels we got hundreds of ...
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How deep is your code?

Dependency tuples. Picture your code. Picture all those functions on which there are no source-code dependencies. That might sound odd: if there are no source-code dependencies on a ...
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