Towards context-aware adaptable web services

ABSTRACT

In this paper, we present a context framework that facilitates the development and deployment of context-aware adaptable Web services. Web services are provided with context information about clients that may be utilized to provide a personalized behavior. Context is extensible with new types of information at any time without any changes to the underlying infrastructure. Context processing is done by Web services, context plugins, or context services. Context plugins and context services pre- and post-process Web service messages based on the available contextinformation. Both are essential for automatic context processing and automatic adaption of Web services to new context types without the necessity to adjust the Web services themselves. We implemented the context framework within the ServiceGlobe system, our open and distributed Web service platform.

REFERENCES

• 1: Rakesh Agrawal , Edward L. Wimmers, A framework for expressing and combining preferences, Proceedings of the 2000 ACM SIGMOD international conference on Management of data, p.297-306, May 15-18, 2000, Dallas, Texas, United States
• 2: Axis Architecture Guide. http://ws.apache.org/axis/java/architecture-guide.html.
• 3: W.-T. Balke, W. Kieβling, and C. Unbehend. Performance and Quality Evaluation of a Personalized Route Planning System. In Proc. of the Brazilian Symposium on Databases (SBBD), pages 328--340, 2003.
• 4: R. Braumandl , A. Kemper , D. Kossmann, Quality of service in an information economy, ACM Transactions on Internet Technology (TOIT), v.3 n.4, p.291-333, November 2003 [doi>10.1145/945846.945847]
• 5: Jan Chomicki, Querying with Intrinsic Preferences, Proceedings of the 8th International Conference on Extending Database Technology: Advances in Database Technology, p.34-51, March 25-27, 2002
• 6: E. Christensen, F. Curbera, G. Meredith, and S. Weerawarana. Web Services Description Language (WSDL) 1.1. http://www.w3.org/TR/wsdl, 2001. W3C Note.
• 7: P. Deutsch. GZIP file format specification version 4.3. RFC 1952, 1996. Network Working Group.
• 8: A. K. Dey, D. Salber, and G. D. Abowd. A Context-based Infrastructure for Smart Environments. In Proc. of the Intl. Workshop on Managing Interactions in Smart Environments (MANSE), pages 114--128, 1999.
• 9: Sastry Duri , Alan Cole , Jonathan Munson , Jim Christensen, An approach to providing a seamless end-user experience for location-aware applications, Proceedings of the 1st international workshop on Mobile commerce, p.20-25, July 2001, Rome, Italy [doi>10.1145/381461.381465]
• 10: M. Ebling, G. Hunt, and H. Lei. Issues for Context Services for Pervasive Computing. In Proc. of the Advanced Workshop on Middleware for Mobile Computing, 2001.
• 11: 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
• 12: Andy Harter , Andy Hopper , Pete Steggles , Andy Ward , Paul Webster, The anatomy of a context-aware application, Wireless Networks, v.8 n.2/3, p.187-197, March-May 2002 [doi>10.1023/A:1013767926256 ]
• 13: A. Held, S. Buchholz, and A. Schill. Modeling of Context Information for Pervasive Computing Applications. In Proc. of the World Multiconference on Systemics, Cybernetics and Informatics (SCI), 2002.
• 14: Jadwiga Indulska , Ricky Robinson , Andry Rakotonirainy , Karen Henricksen, Experiences in Using CC/PP in Context-Aware Systems, Proceedings of the 4th International Conference on Mobile Data Management, p.247-261, January 21-24, 2003
• 15: IONA Technologies Inc. rbix. http://www.iona.com/products/orbix.htm.
• 16: JBoss Aspect Oriented Programming. http://www.jboss.org/developers/projects/jboss/aop.
• 17: C. Kaler, editor. Web Service Security (WS-S ecurity). http://www-106.ibm.com/developerworks/webservices/library/ws-secure/, 2002.
• 18: M. Keidl and A. Kemper. A Framework for Context-Aware Adaptable Web Services (Demonstration). In Proc. of the Intl. Conf. on Extending Database Technology (EDBT), 2004. Accepted for publication.
• 19: M. Keidl, S. Seltzsam, and A. Kemper. Flexible and Reliable Web Service Execution. In Proc. of the Workshop on Entwicklung von Anwendungen auf der Basis der XML Web-Service Technologie, pages 17--30, 2002.
• 20: M. Keidl, S. Seltzsam, and A. Kemper. Reliable Web Service Execution and Deployment in Dynamic Environments. In Proc. of the Intl. Workshop on Technologies for E-Services (TES), volume 2819 of Lecture Notes in Computer Science (LNCS), pages 104--118, 2003.
• 21: M. Keidl, S. Seltzsam, C. König, and A. Kemper. Kontext-basierte Personalisierung von Web Services. In Proc. of the GI Conf. on Database Systems for Business, Technology and Web (BTW), Lecture Notes in Informatics, pages 344--363, 2003.
• 22: M. Keidl, S. Seltzsam, K. Stocker, and A. Kemper. Service Globe: Distributing E-Services across the Internet (Demonstration). In Proc. of the Intl. Conf. on Very Large Data Bases (VLDB), pages 1047--1050, 2002.
• 23: Gregor Kiczales , Erik Hilsdale , Jim Hugunin , Mik Kersten , Jeffrey Palm , William G. Griswold, An Overview of AspectJ, Proceedings of the 15th European Conference on Object-Oriented Programming, p.327-353, June 18-22, 2001
• 24: G. Kiczales, J. Lamping, A. Mendhekar, C. Maeda, C. V. Lopes, J.-M. Loingtier, and J. Irwin. Aspect-Oriented Programming. In Proc. of the European Conf. on Object-Oriented Programming (ECOOP), pages 220--242, 1997.
• 25: W. Kieβling. Foundations of Preferences in Database Systems. In Proc. of the Intl. Conf. on Very Large Data Bases (VLDB), pages 311--322, 2002.
• 26: W. Kieβling and B. Hafenrichter. Optimizing Preference Queries for Personalized Web Services. In Proc. of the IASTED Intl. Conf. on Communications, Internet and Information Technology, pages 461--466, 2002.
• 27: G. Klyne, F. Reynolds, C. Woodrow, H. Ohto, J. Hjelm, M. H. Butler, and L. Tran. Composite Capability/ Preference Profiles (CC/PP): Structure and Vocabularies. http://www.w3.org/TR/CCPP-struct-vocab/, 2004. W3C Recommendation.
• 28: Choonhwa Lee , Sumi Helal, Context Attributes: An Approach to Enable Context-awareness for Service Discovery, Proceedings of the 2003 Symposium on Applications and the Internet, p.22, January 27-31, 2003
• 29: Hartmut Liefke , Dan Suciu, XMill: an efficient compressor for XML data, Proceedings of the 2000 ACM SIGMOD international conference on Management of data, p.153-164, May 15-18, 2000, Dallas, Texas, United States
• 30: Guido Menkhaus, Architecture for Client-Independent Web-Based Applications, Proceedings of the Technology of Object-Oriented Languages and Systems, p.32, March 12-14, 2001
• 31: N. Mitra, editor. SOAP Version 1.2 Part 0: Primer. http://www.w3.org/TR/soap12-part0/, 2003. W3C Recommendation.
• 32: S. K. Mostéfaoui and G. K. Mostéfaoui. Towards A Contextualisation of Service Discovery and Composition for Pervasive Environments. In Proc. of the Workshop on Web-services and Agent-based Engineering (WSABE), 2003.
• 33: Arjan J. H. Peddemors , Marc M. Lankhorst , Johan de Heer, Presence, Location, and Instant Messaging in a Context-Aware Application Framework, Proceedings of the 4th International Conference on Mobile Data Management, p.325-330, January 21-24, 2003
• 34: Stéphanie Riché , Gavin Brebner, Storing and Accessing User Context, Proceedings of the 4th International Conference on Mobile Data Management, p.1-12, January 21-24, 2003
• 35: N. Santos, P. Marques, and L. Silva. A Framework for Smart Proxies and Interceptors in RMI. In Proc. of the Intl. Conf. on Parallel and Distributed Computing Systems (PDCS), 2002.
• 36: Albrecht Schmidt , Kofi Asante Aidoo , Antti Takaluoma , Urpo Tuomela , Kristof Van Laerhoven , Walter Van de Velde, Advanced Interaction in Context, Proceedings of the 1st international symposium on Handheld and Ubiquitous Computing, p.89-101, September 27-29, 1999, Karlsruhe, Germany
• 37: Stefan Seltzsam , Stephan Börzsönyi , Alfons Kemper, Security for Distributed E-Service Composition, Proceedings of the Second International Workshop on Technologies for E-Services, p.147-162, September 14-15, 2001
• 38: João Pedro Sousa , David Garlan, Aura: an Architectural Framework for User Mobility in Ubiquitous Computing Environments, Proceedings of the IFIP 17th World Computer Congress - TC2 Stream / 3rd IEEE/IFIP Conference on Software Architecture: System Design, Development and Maintenance, p.29-43, August 25-30, 2002
• 39: Sun Microsystems Inc. The Java Servlet Specification 2.4. http://java.sun.com.
• 40: Universal Description, Discovery and Integration (UDDI) Technical White Paper. http://www.uddi.org, 2000.
• 41: Jim Waldo, The Jini architecture for network-centric computing, Communications of the ACM, v.42 n.7, p.76-82, July 1999 [doi>10.1145/306549.306582]

INDEX TERMS

Primary Classification:
  H. Information Systems
  H.m MISCELLANEOUS

Additional Classification:
  H. Information Systems
  H.3 INFORMATION STORAGE AND RETRIEVAL
      H.3.4 Systems and Software
          Subjects: Information networks; Distributed systems
      H.3.5 On-line Information Services
          Subjects: Web-based services

General Terms:
Design, Human Factors

Keywords:
automatic context processing, context, extensibility, extensible framework, information services, service platform, web services