Clustered Derby with xpetstore (Derby contest submission)

[Emmanuel Cecchet]

Hi all, Here is a short description of my submission: - I first ported the servlet version of xPetstore (http://xpetstore.sourceforge.net/) based on Velocity, WebWork, Sitemesh, POJO and Hibernate to run with Tomcat 5 and Derby. This uses the Network server and the DB2 universal driver to access Derby remotely and a generic Hibernate mapper. - Now to make this more reliable, I started 3 separate instances of Derby with the C-JDBC (http://c-jdbc.objectweb.org) clustering software. There was a couple of modifications made to C-JDBC to workaround the reserved keywords and Derby data types but now we have xPetstore on Tomcat accessing a cluster of Derby databases (fully mirrored) plus one database for the recovery log allowing for adding new Derby backends on the fly. The good news is that Derby clustering is already operational and we even have a demo for it !!! Now here is the answer to the contest rules: Contest Rules Must use Derby's functionality and capability <>I use Derby with Network server and full JDBC functionalities (fetching schemas, transactions, ...). It's a real great engine with very nice compliant JDBC features. Must integrate Derby with one or more other Apache projects Apache projects used are Velocity and Tomcat mainly. The Geronimo version should also work soon but there are still some problems with xpetstore and Geronimo (the Geronimo team is working on it !). Also C-JDBC is from ObjectWeb but the Apache-ObjectWeb relationship is so friendly that it can almost be considered as an Apache project ;-) Innovative solution To the best of my knowledge, it's the first experience of Derby clustering and it's probably the first integration with Hibernate ! Result can be a tool, mini-applicatoin, or any other demonstration of Derby integration It's a demo of Derby integration including a mini demo application resulting in a great tool for Derby clustering !! ;-) See you tonight for a cool demo of all this, Emmanuel -- Emmanuel Cecchet INRIA Research Scientist | Chief Architect SARDES Project | ObjectWeb Consortium http://sardes.inrialpes.fr | http://www.objectweb.org

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