Integrating publisher/subscriber services in component middleware for distributed real-time and embedded systems

ABSTRACT

Although component-based software development has widespread acceptance in the enterprise business and desktop application domains, developers of distributed real-time and embedded (DRE) systems have encountered limitations with the available component middleware platforms, such as the CORBA Component Model (CCM) and the Java 2 Enterprise Edition (J2EE). These limitations often preclude developers of DRE systems from fully exploiting the benefits of component software. In particular, component middleware platforms lack standards-based publisher/subscriber communication mechanisms that support key quality-of-service (QoS) requirements, such as low latency, bounded jitter, and end-to-end operation priority propagation. QoS-enabled publisher/subscriber services are available in object middleware platforms, such as Real-time CORBA, but such services have not been integrated into component middleware due to a number of development and configuration challenges.This paper provides three contributions to the integration of publisher/subscriber services in component middleware. First, we outline key challenges associated with integrating publisher/subscriber services into component middleware. Second, we describe a methodology for resolving these challenges based on software patterns. Third, we describe a pattern-oriented component middleware platform that we have developed to integrate publisher/subscriber services into component middleware applications.

REFERENCES

• 1: Richard E. Schantz and Douglas C. Schmidt, "Middleware for Distributed Systems: Evolving the Common Structure for Network-centric Applications," in Encyclopedia of Software Engineering, John Marciniak and George Telecki, Eds. Wiley & Sons, New York, 2002.
• 2: George T. Heineman , William T. Councill, Component-based software engineering: putting the pieces together, Addison-Wesley Longman Publishing Co., Inc., Boston, MA, 2001
• 3: Object Management Group, CORBA Components, OMG Document formal/2002-06-65 edition, June 2002.
• 4: Sun Microsystems, "Java#8482; 2 Platform Enterprise Edition," http://java.sun.com/j2ee/index.html, 2001.
• 5: Microsoft Corporation, "Microsoft .NET Development," msdn.microsoft.com/net/, 2002.
• 6: Christopher D. Gill , David L. Levine , Douglas C. Schmidt, The Design and Performance of a Real-Time CORBA SchedulingService, Real-Time Systems, v.20 n.2, p.117-154, March 2001 [doi>10.1023/A:1008137720322]
• 7: David A. Karr , Craig Rodrigues , Joseph P. Loyall , Richard E. Schantz , Yamuna Krishnamurthy , Irfan Pyarali , Douglas C. Schmidt, Application of the QuO Quality-of-Service Framework to a Distributed Video Application, Proceedings of the Third International Symposium on Distributed Objects and Applications, p.299, September 17-20, 2001
• 8: Carlos O'Ryan, Douglas C. Schmidt, and J. Russell Noseworthy, "Patterns and Performance of a CORBA Event Service for Large-scale Distributed Interactive Simulations," International Journal of Computer Systems Science and Engineering, vol. 17, no. 2, Mar. 2002.
• 9: Frank Buschmann , Regine Meunier , Hans Rohnert , Peter Sommerlad , Michael Stal, Pattern-oriented software architecture: a system of patterns, John Wiley & Sons, Inc., New York, NY, 1996
• 10: Design and evaluation of a wide-area event notification service, ACM Transactions on Computer Systems (TOCS), v.19 n.3, p.332-383, Aug. 2001 [doi>10.1145/380749.380767]
• 11: Douglas C. Schmidt and et al., "TAO: A Pattern-Oriented Object Request Broker for Distributed Real-time and Embedded Systems," IEEE Distributed Systems Online, vol. 3, no. 2, Feb. 2002.
• 12: Douglas C. Schmidt and Carlos O'Ryan, "Patterns and Performance of Real-time Publisher/Subscriber Architectures," Journal of Systems and Software, Special Issue on Software Architecture - Engineering Quality Attributes, 2002.
• 13: Object Management Group, Event Service Specification Version 1.1, OMG Document formal/01-03-01 edition, Mar. 2001.
• 14: Nanbor Wang, Douglas C. Schmidt, Aniruddha Gokhale, Craig Rodrigues, Balachandran Natarajan, Joseph P. Loyall, Richard E. Schantz, and Christopher D. Gill, "QoS-enabled Middleware," in Middleware for Communications, Qusay Mahmoud, Ed. Wiley and Sons, New York, 2003.
• 15: Object Management Group, The Common Object Request Broker: Architecture and Specification, 3.0.2 edition, Dec. 2002.
• 16: Aniruddha Gokhale , Douglas C. Schmidt , Balachandran Natarajan , Nanbor Wang, Applying model-integrated computing to component middleware and enterprise applications, Communications of the ACM, v.45 n.10, October 2002 [doi>10.1145/570907.570933]
• 17: Nanbor Wang, Douglas C. Schmidt, Aniruddha Gokhale, Christopher D. Gill, Balachandran Natarajan, Craig Rodrigues, Joseph P. Loyall, and Richard E. Schantz, "Total Quality of Service Provisioning in Middleware and Applications," The Journal of Microprocessors and Microsystems, vol. 27, no. 2, pp. 45--54, mar 2003.
• 18: Erich Gamma , Richard Helm , Ralph Johnson , John Vlissides, Design patterns: elements of reusable object-oriented software, Addison-Wesley Longman Publishing Co., Inc., Boston, MA, 1995
• 19: Object Management Group, Notification Service Specification, Object Management Group, OMG Document formal/2002-08-04 edition, Aug. 2002.
• 20: Timothy H. Harrison , David L. Levine , Douglas C. Schmidt, The design and performance of a real-time CORBA event service, Proceedings of the 12th ACM SIGPLAN conference on Object-oriented programming, systems, languages, and applications, p.184-200, October 05-09, 1997, Atlanta, Georgia, United States
• 21: Douglas C. Schmidt , Stephen D. Huston , Frank Buschmann, C++ Network Programming: Systematic Reuse with ACE and Frameworks, Vol. 2, Pearson Education, 2002
• 22: Douglas C. Schmidt , Hans Rohnert , Michael Stal , Dieter Schultz, Pattern-Oriented Software Architecture: Patterns for Concurrent and Networked Objects, John Wiley & Sons, Inc., New York, NY, 2000
• 23: Aniruddha Gokhale, Douglas C. Schmidt, Balachandran Natarajan, Jeff Gray, and Nanbor Wang, "Model Driven Middleware," In Middleware for Communications, Qusay Mahmoud, Ed. Wiley and Sons, New York, 2003.
• 24: Janos Sztipanovits , Gabor Karsai, Model-Integrated Computing, Computer, v.30 n.4, p.110-111, April 1997 [doi>10.1109/2.585163]
• 25: Jeff Gray , Ted Bapty , Sandeep Neema , James Tuck, Handling crosscutting constraints in domain-specific modeling, Communications of the ACM, v.44 n.10, p.87-93, Oct. 2001 [doi>10.1145/383845.383864]
• 26: Object Management Group, Model Driven Architecture (MDA), OMG Document ormsc/2001-07-01 edition, July 2001.
• 27: Arvind S. Krishna, Douglas C. Schmidt, Ray Klefstad, and Angelo Corsaro, "Real-time CORBA Middleware," in Middleware for Communications, Qusay Mahmoud, Ed. Wiley and Sons, New York, 2003.
• 28: Aniruddha Gokhale, Krishnakumar Balasubramanian, Jaiganesh Balasubramanian, Arvind Krishna, George T. Edwards, Gan Deng, Emre Turkay, Jeffrey Parsons, and Douglas C. Schmidt, "Model Driven Middleware: A New Paradigm for Deploying and Provisioning Distributed Real-time and Embedded Applications," Submitted to The Journal of Science of Computer Programming: Special Issue on Model Driven Architecture, 2004.
• 29: Aniruddha Gokhale, "Component Synthesis using Model Integrated Computing," www.dre.vanderbilt.edu/cosmic, 2003.

INDEX TERMS

Primary Classification:
  C. Computer Systems Organization
  C.3 SPECIAL-PURPOSE AND APPLICATION-BASED SYSTEMS

Additional Classification:
  D. Software
  D.2 SOFTWARE ENGINEERING
        D.2.13 Reusable Software

Keywords:
CORBA Component Model, component middleware, model-based systems, real-time event service