Home » Author Archives: Pascal Alma (page 2)

Author Archives: 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.

Run your Hadoop MapReduce job on Amazon EMR

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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 with the Java AWS SDK is to show the complete example in my opinion, so lets start. Set ...

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Writing a Hadoop MapReduce task in Java

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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 on a Maven project like any other Java project.                 Prepare the example input Lets start with a fictional business case. ...

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Source control your database with Liquibase

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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 of my application (or a new release of it) to another environment easier and (more) fool proof. In the past I had to supply a ...

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Archiving data to AWS Glacier

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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 it is with S3. It may take a few hours to restore the data but if you are using this service for real archiving purposes this shouldn’t ...

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Working with Amazon Web Services (EC2)

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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 to that we worked with RDS, Elastic Load Balancing, SNS and VPC, Elastic Beanstalk and discussed a lot of terminology and business cases. In this post I ...

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One way messaging with WSO2 ESB

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As I posted before I am currently working with the WSO2 ESB. To get a good understanding of this ESB I have been walking through the samples (haven’t finished all of them yet). Example 12 is about one-way messaging with the ESB and makes use the TCP Monitor to make it visible. I have described before how to setup a ...

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Using Maven Jetty plugin

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Although I am using Maven since a long time I never used the Jetty plugin until recently. To be able to test a REST client I created a servlet which showed me all incoming parameters and headers with the incoming request. To run the servlet in a container I decided to give the Maven Jetty plugin a go. So first ...

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Starting with WSO2 ESB by running the samples

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I recently joined a new assignment where we have to implement an ESB solution based on the WSO2 toolstack. Although I am familiair with most of the concepts of the ESB and some other implementations (like Mule ESB) it is the first time I will have to work with the WSO2 ESB. Luckily there is a lot of documentation to ...

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