Verteilte Anwendung komplexer Filteroperationen auf große Bilder
(This is in German. I will translate it, if enough comments asking me to do it ) Bei der Aufklärung werden zur Auswertung von Satellitenbildern derzeit komplexe Filteroperationen auf dem jeweiligen Auswerter-PC ausgeführt. Die Filter können der allgemeinen Bildverbesserung dienen oder auch dafür sorgen, dass bestimmte Objekte wie Strassen oder Fahrzeuge auf einem Satellitenbild besser [...]
Scala Case Class as JPA EmbeddedId
It is a good idea to use case classes as EmbeddedId class. Id classes can be used to specify an embeddable composite primary key class owned by the entity (more…). Scala Case classes provide a default equals and an “automatic” generation of class properties. So lets create a really simple example Entity Class OSEmbeddedId. @Entity [...]
Mishmash of Topics (worth to look at)
Mostly #Scala, #Hadoop, #REST, #NoSQL tweets, unsorted, unvalidated and incomplete… @KaiWaehner Awesome tutorial about #Scala, #Akka and Apache #Camel: (here) @jsuereth post bout ‘How you should think about Delimited Continuations in Scala (here) @bdarfler Slides from my Performance talk at #nescala (here) Eric Meijer’s series on functional programming (Chapter 1) @otisg Excellent thread on marrying HBase and Lucene (here) @otisg [...]
Yet Another Try: A REST Client with Jersey and Scala
[UPDATE] I pushed the code as SJersey to Github. For usage examples check out the test code here [/UPDATE] The are many awesome REST frameworks out there, for Java and for Scala as well. Most of the concepts do cover the server side. Important I know, but where are the smart client side APIs/DSLs? There [...]
Neo4j REST Server, GWT and JIT Part 3
This is a Proof of Concept (from GTUG BootCamp 2010), which is: Try to code a complete client side data-load (from some REST services) and graph visualization using Neo4j REST server, the Java Script Visualization Framework JIT and Google Web Toolkit. This is a followup to Part 2 I integrated what was made by Sascha [...]
Neo4j REST Server, GWT and JIT Part 2
This is a Proof of Concept (from GTUG BootCamp 2010), which is: Try to code a complete client side data-load (from some REST services) and graph visualization using Neo4j REST server, the Java Script Visualization Framework JIT and Google Web Toolkit. This is a followup to Part 1 that stopped by loading all Nodes of [...]
Neo4j REST Server, GWT and JIT Part 1
This is a Proof of Concept (from GTUG BootCamp 2010), which is: Try to code a complete client side data-load (from some REST services) and graph visualization using Neo4j REST server, the Java Script Visualization Framework JIT and Google Web Toolkit. [update] this is how it looks like today [/update] What to read to understand [...]
Wave in a Box (GTUG BootCamp)
Basic Installation Two days before the Google Developer Day 2010 I attended the Munich GTUG BootCamp (Steph and Nils took some nice photos. See here, here and here). On day one, we (Daniel, Sascha and me) really had no idea what to do, till Stephan Linzner said that he wants to install Wave in a [...]
Spatial Lucene Example in Scala
Spatial queries are getting more and more important e.g. if you want a query all restaurants in a distance of 5 kilometers around your actual position. This is not easy because our planet is a sphere (so this requires a projection of locations) and spatial calculations are very resource consuming. Thats why Lucene implemented a [...]
HBase on Cloudera VM
This is a very brief installation instruction Please feel free to change the path or HBase version. 1. Download the Cloudera training VM from their Website. Start it and follow Clouderas instructions to update the VM. 2. get and install the HBase ‘developer preview’ release sudo -u hadoop mkdir /home/hadoop/hbase cd /home/hadoop/hbase sudo -u hadoop [...]
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