Improving abstraction, encapsulation, and performance within mixed-mode real-time Java applications

ABSTRACT

Much of the appeal of Java for the implementation of real-time software components derives from the ability to leverage the combination of non-real-time, soft real-time, and hard real-time components all written in the same Java language. To date, deployment of non-real-time Java far exceeds deployment of real-time Java. To improve the appeal of real-time Java, it is important to improve abstraction of real-time programming concepts, and increase the quality of the interface between different modes of Java execution. This paper discusses integration techniques that enable the efficient and reliable mixing of hard real-time, soft real-time, and non real-time software components within a single application. Compared with available alternatives, these approaches offer improved safety and separation of concerns, while also improving implementation efficiency.

REFERENCES

• 1: G. Bollella, B. Brosgol, J. Gosling, P. Dibble, S. Furr, M. Turnbull, "The Real-Time Specification for Java", Addison Wesley Longman, 195 pages, Jan. 15, 2000.
• 2: Kelvin Nilsen, A type system to assure scope safety within safety-critical Java modules, Proceedings of the 4th international workshop on Java technologies for real-time and embedded systems, October 11-13, 2006, Paris, France [doi>10.1145/1167999.1168017]
• 3: Greg Bollella , Bertrand Delsart , Romain Guider , Christophe Lizzi , Frederic Parain, Mackinac: Making HotSpot" Real-Time, Proceedings of the Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing, p.45-54, May 18-20, 2005 [doi>10.1109/ISORC.2005.31]
• 4: K. Nilsen. "Applying COTS Java Benefits to Mission-Critical Real-Time Software", Crosstalk The Journal of Defense Software Engineering, pp. 19--24, June 2007.
• 5: "Real-Time Core Extensions 1.0.14", International J Consortium Specification, 170 pages. Sept. 2000, available at http://www.opengroup.org/rtforum/rt_java//uploads/40/3417/rtce.1.0.14_May_03.pdf.
• 6: C. Pu, H. Massalin, J. Ionnidis. "The Synthesis Kernel", Computing Systems 1 (1), pp. 11--32 (Winter 1988).
• 7: Ayers , Barabanov Victor Yodaiken, Introducing Real-Time Linux, Linux Journal, v.1997 n.34es, Feb. 1997
• 8: K. Nilsen. "Using Java for Reusable Embedded Real-Time Component Libraries", Crosstalk The Journal of Defense Software Engineering, pp. 13--18. December 2004.
• 9: Ken Arnold , James Gosling , David Holmes, Java(TM) Programming Language, The (4th Edition), Addison-Wesley Professional, 2005
• 10: K. Nilsen. "Guidelines for Scalable Java Development of Real-Time Systems", March 2006, available at http://research.aonix.com/jsc.
• 11: M. Klein, T. Ralya, B. Pollak, R. Obenza. A Practioner's Handbook for Real-Time Analysis: Guide to Rate Monotonic Analysis for Real-Time Systems. 712 pages. Kluwer Academic Publishers. November 1993. (http://www.sei.cmu.edu/publications/books/otherbooks/rma.hndbk.html)
• 12: M. Joseph, P. Pandya. "Finding Response Times in a Real-Time System", The Computer Journal, 29(5), pp. 390--395. 1986.

INDEX TERMS

Primary Classification:
  D. Software
  D.3 PROGRAMMING LANGUAGES
      D.3.3 Language Constructs and Features
          Subjects: Concurrent programming structures

General Terms:
Design, Languages, Performance, Reliability

Keywords:
DO-178B, Java, RTSJ, safety-critical certification