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Setting up Apache Hadoop Multi – Node Cluster

We are sharing our experience about Apache Hadoop Installation in Linux based machines (Multi-node). Here we will also share our experience about different troubleshooting also and ...
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Running Map-Reduce Job in Apache Hadoop (Multinode Cluster)

We will describe here the process to run MapReduce Job in Apache Hadoop in multinode cluster. To set up Apache Hadoop in Multinode Cluster, one can read Setting up Apache Hadoop Multi ...
java-interview-questions-answers

Java EE CDI programmatic dependency disambiguation example – Injection Point inspection

In this tutorial we shall see how we can avoid programmatic dependency disambiguation when injecting Java EE CDI beans. We have already shown in the Jave EE dependency disambiguation ...
java-interview-questions-answers

5 Reasons to use Guava

Guava is an open source library containing many classes for Java and written by Google. It’s a potentially useful source of miscellaneous utility functions and classes that I’m ...
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Goodbye Guvnor. Hello Drools Workbench.

Many things are changing for Drools 6.0. Along with the functional and feature changes we have restructured the Guvnor github repository to better reflect our new architecture. Guvnor ...
java-interview-questions-answers

JPA 2 | EntityManagers, Transactions and everything around it

Introduction One of the most confusing and unclear thing for me, as a Java Developer has been the mystery surrounding the Transaction Management in general and how JPA handles transaction ...
spring-interview-questions-answers

Invoking Async method call using Future object in Spring

The next example will demonstrate an async method call inside the Spring container. Why do we need async method calls? In some cases we don’t really know if replay is expected or ...
java-interview-questions-answers

Multiple dynamic includes with one JSF tag

Every JSF developer knows the ui:include and ui:param tags. You can include a facelet (XHTML file) and pass an object, which will be available in the included facelet, as follows:                 <ui:include ...
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WildFly 8.0.0.Alpha1 release and a bit of history

It’s been around 2 weeks now since we released WildFly 8.0.0.Alpha1 version. The download is available on the WildFly downloads page. I’m sure many of you might be wondering ...
java-interview-questions-answers

Java EE 7 is final. Thoughts, Insights and further Pointers.

It took us a little less than three years to get the next Java EE version out the door. On April 16th this year the JCP EC voted on JSR 342 and approved it. This is kind of a success ...
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