Affiliations: Institute of Computer Science, AGH, al. Mickiewicza
30, 30-059 Kraków, Poland. Tel.: +48 12 617 39 64; Fax: +48 12 633 80
54 | Academic Computer Centre -- CYFRONET, Nawojki 11,
30-950 Kraków, Poland | Emory University, Atlanta, Department of Math and
Computer Science, 1784 North Decatur Road, Suite 100, Atlanta, GA 30322, USA.
Tel.: +404 712 8665 | University of Tennessee, Knoxville, Department of
Computer Science, 1122 Volunteer Blvd., Suite 203, Knoxville, TN 37996-3450,
USA. Tel.: +865 974 8295; Fax: +865 974 8296
Note: [] Department of Computer Science, 1122 Volunteer Blvd., Suite 203,
Knoxville, TN 37996-3450, USA. Tel.: +865 974 8295; Fax: +865 974 8296; E-mail:
luszczek@cs.utk.edu
Abstract: Java is growing in appropriateness and usability for high
performance computing. With this increasing adoption, issues relating to
combining Java with existing codes in other languages become more important.
The Java Native Interface (JNI) API is portable but too inconvenient to be used
directly owing to its low-level API. This paper presents Janet -- a highly
expressive Java language extension and preprocessing tool that enables
convenient integration of native code with Java programs. The Janet methodology
overcomes some of the limitations of JNI and generates Java programs that
execute with little or no degradation despite the flexibility and generality of
the interface.
