Convert document to HTML with Apache Tika

Play Framework on Heroku and custom dependencies

SOA vs. Domain design and OpenSessionInThreadExecution pattern

Lucene permissions and Hibernate Search

javax.mail and plain, STARTTLS, SSL/TSL connection for POP3 and SMTP without keystore

Spring 3 and Mule 2 initialized by SpringXmlConfigurationBuilder

High-availability architecure with mysql replication and C3P0

Transparent dynamic forms with LazyList

Host and user name in log4j logs

Make an algorithm concurrent with Java thread pool