Introduction

PUPIL,Program for User Package Interface and Linking, is a software environment,- the program,- to allow developers to quickly and efficiently link together multiple pieces of software,- the user packages,- that have been and are actively being developed by researchers. The program is general and can be used to link user packages from any scientific or engineering domain. However, we developed it with multi-scale simulation in the field of material science in mind, and the interfaces included in this first release show that bias.


The design philosophy of PUPIL was to provide an environment for the software developer of user packages for simulation in material science and engineering in which it is possible to pass control and data from one user package to another in a straightforward manner. A requirement of the design is that the changes any developer must make to any of the user packages must be small. To make such changes, it is obviously required to understand the user package, but we wanted to avoid the need to have a complete and exhaustive understanding such as would be required when one wants to create a combined user package from to independently developed user packages.


The architecture of PUPIL is that of a supervisor program that coordinates the execution and communication between the user packages, which are called calculation units (CU). The supervisor is implemented as a distributed program with one manager and several workers, one for each calculation unit. The manager and the workers communicate via the CORBA (common object request broker) protocol. The worker code is part of the calculation unit executable and the communication with the calculation unit and its worker is by subroutine calls. The manager and the worker code are written in Java. The worker’s Java code calls C-code in the calculation unit through the JNI (Java Native Interface). The calculation code, often written in Fortran or C, calls C-code in the PUPIL library to.


Capabilities
Current version: 2.0.0 (January 12, 2013)

ChangeLog

New release: version 2.0 (January 12, 2013)
New release: version 1.4 (August 4, 2011)
New release: version 1.3 (December 12, 2009)
New documentation release (May 10, 2009)
New bugfix release: Version 1.2-1 (March 15, 2009)
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