Self-configuring object-to-relational mapping queries

ABSTRACT

Object-to-relational maps are nowadays routinely utilized in providing a persistency mechanism for object-oriented programs. We present how an object-to-relational mapper, such as Hibernate, provides transparent persistency to object-oriented programs. We then show how the existing approaches of eager and lazy fetching of associations are problematic under the face of program evolution. As an improvement, we present self-configuring components, which reflectively configure the persistency layer usage sites, thus leading to improved maintainability of software.

A self-configuring component analyses the actual persistency layer usage pattern. Based on this information, the actual queries are configured. A general algorithm for retrieving the actual usage pattern is given. As an implementation mechanism, we discuss different approaches for the self-configuring components. Practical choices for implementation can vary between analysis of abstract syntax trees and Java byte-code analysis. Suitability of two byte-code analysis frameworks, namely BCEL and Soot are evaluated.

REFERENCES

• 1: L. DeMichiel and M. Keith, 2007. JSR 220: Enterprise JavaBeans#8482;3.0.
• 2: Christian Bauer , Gavin King, Java Persistence with Hibernate, Manning Publications Co., Greenwich, CT, 2006
• 3: G. Kiczales, J. Lamping, A. Mendhekar, C. Maeda, C. Lopes, J-M. Loingtier and J. Irwin, 1997. Aspect-Oriented Programming, Proceedings of the ECOOP 1997, LNCS vol. 1241, pp. 220--242.
• 4: Friedrich Steimann, The paradoxical success of aspect-oriented programming, ACM SIGPLAN Notices, v.41 n.10, October 2006
• 5: P. von der Ahé, 2006. JSR 199: Java#8482; Compiler API.
• 6: F. Logozzo and M. Fähndrich, 2008. On the Relative Completeness of Bytecode Analysis versus Source Code Analysis. Proceedings of Compiler Construction, 17^th International Conference CC08, LNCS vol. 4959, pp. 197--212.
• 7: M. Dahm, 2001. Byte Code Engineering with the BCEL API. Technical Report B-17-98, Freie Universität at Berlin, Institut für Informatik.
• 8: Tim Lindholm , Frank Yellin, Java Virtual Machine Specification, Addison-Wesley Longman Publishing Co., Inc., Boston, MA, 1999
• 9: 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
• 10: Linda M. Seiter , Jens Palsberg , Karl J. Lieberherr, Evolution of Object Behavior Using Context Relations, IEEE Transactions on Software Engineering, v.24 n.1, p.79-92, January 1998 [doi>10.1109/32.663999]
• 11: R. E. Kurt Stirewalt , Laura K. Dillon, Generation of visitor components that implement program transformations, Proceedings of the 2001 symposium on Software reusability: putting software reuse in context, p.86-94, May 2001, Toronto, Ontario, Canada
• 12: R. Vallée-Rai, L. Hendren, V. Sundaresan, P. Lam, E. Gagnon and P. Co, 1999. Soot - a Java Optimization Framework. Proceedings of the 1999 conference of the Centre for Advanced Studies on Collaborative research, pp. 125--135.
• 13: J. Lhoták and O. Lhoták, 2004. Visualizing Program Analysis with the Soot-Eclipse Plugin. Proceedings of eTX 2004, 2nd eclipse Technology Exchange, pp. 27--31.
• 14: J. Lhoták and O. Lhoták, L. Hendren, 2004. Integrating the Soot compiler infrastructure into an IDE. Proceedings of Compiler Construction, 13^th International Conference CC04, LNCS vol. 2985, pp. 281--297.
• 15: A. Ibrahim and W. R. Cook, 2006. Automatic Prefetching by Traversal Profiling in Object Persistence Architectures. Proceedings of the European Conference on Object-Oriented Programming (ECOOP), pp. 50--73.
• 16: Ben Wiedermann , William R. Cook, Extracting queries by static analysis of transparent persistence, ACM SIGPLAN Notices, v.42 n.1, January 2007

INDEX TERMS

Primary Classification:
  D. Software
  D.1 PROGRAMMING TECHNIQUES

General Terms:
Design, Performance, Reliability

Keywords:
object-to-relational mapping, persistence, software maintainability