The Forest project in Sun Microsystems Laboratories in collaboration
with the Persistence and Distribution group at the University of
Glasgow is pleased to announce PJama version 0.3.3, a research
prototype that provides orthogonal persistence for
Java(TM). [Previously PJama went by the name PJava or Persistent
Java].
Orthogonal persistence makes it possible for Java objects to persist
between program executions with the absolute minimum effort required
from the application programs themselves. No pre-processors or
post-processors are required, making it easy to reuse classes
developed by third parties. Application programmers can focus
entirely on application logic. This simplifies maintenance and
development because the application logic remains clearly visible.
PJama 0.3.3 includes a modified virtual machine that is derived from
and compatible with JavaSoft's JDK(TM) 1.1.3, and runs on
Solaris(TM) SPARC/x86. A version for Windows NT/95 will be
available later this month. This release is available under a signed
license for research and evaluation purposes to both academic and
commercial organizations.
This version has a simple transactional model, operates with a one-to-one
relationship between a Java virtual machine and a persistent store, has
check-pointing and recovery and has been used with object populations of 10
million and stores larger than 400 Mbytes. We believe that it is capable of
operating with stores of about 1.5 Gbytes.
We are keen to establish a user-community in order to gain feedback that
guides future research. We encourage you to evaluate PJama. We are particularly
interested in building a working relationship with a small number of groups who
will develop significant applications using this technology.
Further information on PJama and instructions on how to acquire the release can
be found on our web site at "http://www.sunlabs.com/research/forest".
Mick Jordan & Malcolm Atkinson
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