Starting with WSO2 ESB by running the samples
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...
View ArticleUsing Maven Jetty plugin
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...
View ArticleOne way messaging with WSO2 ESB
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...
View ArticleWorking 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 to that we...
View ArticleUsing 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 level: set up and...
View ArticleArchiving 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 it is with S3. It...
View ArticleSource 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 of my...
View ArticleWriting 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 on a Maven project...
View ArticleRun 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 with the Java...
View ArticleUnit 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 this post I show how...
View ArticleRunning 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 nice to check out...
View ArticleMule 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 a version here)....
View Articleright-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 so by putting it...
View ArticleDeveloping with WSO2
Since a few months I am back working with WSO2 products. In the upcoming posts I describe some of the (small) issues I ran into and how to solve them. The first thing I did when setting up my...
View ArticleMaking use of the open sources of WSO2 ESB
When implementing services using the WSO2 stack (or any other open source Java framework) you will sooner or later run into a situation that the framework behaviour doesn’t do what you expect it should...
View ArticleCalculate PageRanks with Apache Hadoop
Currently I am following the Coursera training ‘Mining Massive Datasets‘. I have been interested in MapReduce and Apache Hadoop for some time and with this course I hope to get more insight in when and...
View ArticleRunning PageRank Hadoop job on AWS Elastic MapReduce
In a previous post I described an example to perform a PageRank calculation which is part of the Mining Massive Dataset course with Apache Hadoop. In that post I took an existing Hadoop job in Java and...
View ArticleMessage Content Filtering with WSO2 ESB
Every integration architect or developer should be familiair with Enterprise Integration Patterns (EIP) as described by Gregor Hohpe and Bobby Woolf. One of the patterns is the ‘Content Message Filter’...
View ArticleUsing AWS SQS as JMS provider with Spring
Recently AWS published a new client library that implements the JMS 1.1 specification and uses their Simple Queue Service (SQS) as the JMS provider (see Jeff Barr’s post here). In my post I will show...
View ArticleCreating a Message Driven Bean with AWS SQS in Spring
In my previous post I showed a simple example how to use AWS SQS with Spring Framework to put messages on a queue and to read them from the queue. In this post I go one step further and use Spring to...
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