About Pascal Alma

Pascal is a senior JEE Developer and Architect at 4Synergy in The Netherlands. Pascal has been designing and building J2EE applications since 2001. He is particularly interested in Open Source toolstack (Mule, Spring Framework, JBoss) and technologies like Web Services, SOA and Cloud technologies. Specialties: JEE, SOA, Mule ESB, Maven, Cloud Technology, Amazon AWS.

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right-pad values with XSLT

In this post an XSLT function that can be used to right-pad the value of an element with a chosen character to a certain length. No rocket science but this might become handy again ...
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Mule ESB, ActiveMQ and the DLQ

In this post I will show a simple Mule ESB flow to see the DLQ feature of Active MQ in action. I assume you have a running Apache ActiveMQ instance available (if not you can download ...
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Running multiple ActiveMQ instances on one machine

A few weeks ago I started making use of Apache ActiveMQ again as the JMS provider with my Mule ESB solution. Since it had been a few years that I used ActiveMQ I thought it would be ...
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Unit testing a Java Hadoop job

In my previous post I showed how to setup a complete Maven based project to create a Hadoop job in Java. Of course it wasn’t complete because it is missing the unit test part . In ...
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Run your Hadoop MapReduce job on Amazon EMR

I have posted a while ago how to setup an EMR cluster by using CLI. In this post I will show how to setup the cluster by using the Java SDK for AWS. The best way to show how to do this ...
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Writing a Hadoop MapReduce task in Java

Although Hadoop Framework itself is created with Java the MapReduce jobs can be written in many different languages. In this post I show how to create a MapReduce job in Java based ...
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Source control your database with Liquibase

I recently started to use Liquibase on a project to keep track of the database changes in our Java Enterprise application. I must say that I like the way it works. It makes the deployment ...
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Archiving data to AWS Glacier

For archiving your data at AWS you can use AWS Glacier. This service offers cheaper storage than the S3 service but the downside is that your data won’t be accessible right away as ...
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Using AWS ElasticMapReduce with the Command Line Interface

In this post I am going to use the AWS MapReduce service (called ElasticMapReduce) by making use of the CLI for EMR. The process of using EMR can be divided in three steps on a high ...
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Working with Amazon Web Services (EC2)

As posted before I attended to a technical handson AWS training last week. The subjects during these days were of course the standard EC2 and S3 services which I have used before. Added ...
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