NDLI: Lightweight Morphing Support for Evolving Middleware Data Exchanges in Distributed Applications

Content Provider	IEEE Xplore Digital Library
Author	Agarwala, S. Eisenhauer, G. Schwan, K.
Copyright Year	2005
Description	Author affiliation: Coll. of Comput., Georgia Inst. of Technol., Atlanta, GA (Agarwala, S.; Eisenhauer, G.; Schwan, K.)
Abstract	Most systems must evolve as their missions or roles change and/or as they adapt to new execution environments. When evolving large distributed applications, it is particularly difficult to make changes to the data formats that underlie their components' communications, because such 'format evolution' can affect all or many application components. Prior approaches to the problem of implementing changes in the communications of a deployed system have relied upon ad-hoc solutions or on protocol negotiation to avoid message format mismatches. Unfortunately, such solutions tend to increase the complexity of application code. This paper presents a novel approach to the problem of data format evolution that combines meta-data about the data being exchanged with dynamic binary code generation to create a robust data exchange system that naturally supports application evolution. The idea is to specialize the communications of application components by dynamically generating the code that can automatically transform incoming data into forms that receiving components can understand. A realistic example in the context of publish/subscribe middleware is used to illustrate how this technique can be applied to enhance interoperability between different version of distributed applications
Sponsorship	IEEE Comput. Soc. Tech. Comm. on Distributed Process. (TCDP)
Starting Page	697
Ending Page	706
File Size	158037
Page Count	10
File Format	PDF
ISBN	0769523315
ISSN	10636927
DOI	10.1109/ICDCS.2005.45
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-06-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Middleware Distributed computing Large-scale systems Data structures Educational institutions Binary codes Robustness Context Wireless application protocol Hardware
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Hardware and Architecture Software

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