Jevgeni Kabanov
Jevgeni Kabanov is the founder and lead of ZeroTurnaround, a development tools company that focuses on productivity. Before
that he worked as the R&D director of Webmedia, Ltd, the largest
custom software development company in the Baltics. As part of the
effort to reduce development time tunraround he wrote the prototype of
the ZeroTurnaround flagship product, JavaRebel, a class reloading JVM
plugin.
Jevgeni has been speaking at international conferences for several
years, including JavaPolis/Devoxx, JavaZone, JAOO and so on. He also
has an active research interest, publishing several papers on topics
ranging from category theoretical notions to typesafe Java DSLs.
Besides the commercial products made for ZeroTurnaround, Jevgeni is a
co-founder of two open-source projects -- Aranea and Squill. Aranea is a web development and integration platform based on strong object-
oriented principles. Squill is a typesafe
internal DSL for constructing and executing SQL queries.
Jevgeni's personal blog can be found at dow.ngra.de.
Track abstract - Java
Do you really get class loaders?
Class loaders are at the core of the Java language. Java EE containers, OSGi, NetBeans modules, Tapestry 5, Grails and many others use class loaders heavily. Yet when something goes wrong, would you know how to solve it?
In this session we'll take a tour of the Java class loading mechanism, both from JVM and developer point of view. We'll see how different delegation systems are built, how synchronization works, what is the difference between finding classes and resources, what wrong assumptions has been made and are now supported.
Next we will look at typical problems that you get with class loading and how to solve them. ClassNoDefError, IncompatibleClassChangeError, LinkageError and many others are symptoms of specific things going wrong that you can usually find and fix. For each problem we'll go through a hands on demo with a corresponding solution.
Finally we'll take a look at the complicated class loading mechanisms like the ones used in OSGi and Tapestry 5. We'll look in detail at the benefits they have and problems they might cause.
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