Welcome to the JVSTM project
The JVSTM (Java Versioned STM) is a Java library implementing our approach to STM (Software Transactional Memory), which introduces the concept of versioned boxes.
The Java Versioned Software Transactional Memory (JVSTM) is a pure Java library implementing an STM (1). JVSTM introduces the concept of versioned boxes (2), which are transactional locations that may be read and written during transactions, much in the same way of other STMs, except that they keep the history of values written to them by any committed transaction.
Since version 2 the JVSTM implementation is entirely non-blocking (3).
 João Cachopo: Development of Rich Domain Models with Atomic Actions. Ph.D. thesis, Technical University of Lisbon (2007)
 João Cachopo, António Rito-Silva: Versioned boxes as the basis for memory transactions. Science of Computer Programming 63(2), 172-185 (2006)
 Sérgio Miguel Fernandes, João Cachopo: Lock-free and scalable multi-version Software Transactional Memory. 16th ACM SIGPLAN Annual Symposium on Principles and Practice of Parallel Programming, 179--188 (2011)