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Making SOA-based systems coherent and trustworthy
Descriptive
TitleInfo
Title
Making SOA-based systems coherent and trustworthy
Name
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Lam
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Tin
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1979-
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Tin Lam
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Minsky
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Naftaly
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Naftaly Minsky
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Advisory Committee
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chair
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Nguyen
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Thu
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Thu Nguyen
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Advisory Committee
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internal member
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Wright
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Rebecca
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Rebecca Wright
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Advisory Committee
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internal member
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Micallef
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Josephine
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Josephine Micallef
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Advisory Committee
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Rutgers University
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Graduate School - New Brunswick
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theses
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2012
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2012-05
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2012
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xx
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eng
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Topic
Computer Science
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Rutgers University Electronic Theses and Dissertations
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ETD_3966
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electronic resource
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Extent
xii, 94 p. : ill.
Note
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Ph.D.
Note
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Includes bibliographical references
Note
(type = statement of responsibility)
by Tin Lam
Abstract
(type = abstract)
Under Service Oriented Architecture (SOA), a software system - such as one that supports an enterprise-consists of multiple heterogeneous servers. These servers may be distributed over
the internet, and may be managed under different administrative domains. SOA has become hugely popular, particularly as the architecture of large and complex distributed systems such as
enterprise systems, grids, virtual enterprises, and supply chains. Unfortunately, this architecture as it is currently defined and being used, suffers from serious problems as outlined below. First, there is no means to ensure that a fragmented and open system like a SOA-based system satisfies desired global constraints, or can establish any regularity over the system. Second, service providers can make their own commitments to clients. However, the SOA
methodology provides no guarantee to clients that the commitment made by a given server will be satisfied. Note that although service providers should have the freedom to specify their own commitments, they must conform to the global constraints imposed at large, and
such conformity must be enforced. Third, when using a composite service, clients indirectly communicate with services via an orchestrator. Such indirect interaction may cause concerns
for both clients and services, but no formal mechanism has been designed to address those concerns. Finally, it is not possible to ensure that coordination between disparate servers—called ”choreography” under SOA— is carried out safely and correctly. The overarching goal of my dissertation is to design a regulatory mechanism to address all these problems in a scalable manner. The mechanism is an extension of Law Governed Interaction (LGI) - a decentralized coordination and control mechanism for distributed systems. We call this mechanism ”LG-SOA”, for Law-Governed-SOA, which enables high expressive power, efficient enforcement, as well as good scalability. We will also present how LG-SOA can be applied to legacy systems. Case studies in the context of enterprise systems demonstrate the flexibility and applicability of this mechanism. Experiments show the overhead introduced by LG-SOA is relatively small, especially in the context of geographically distributed systems
like SOA-based systems. In sum, LGI-SOA is effective and versatile in making SOA-based systems more coherent and trustworthy.
the internet, and may be managed under different administrative domains. SOA has become hugely popular, particularly as the architecture of large and complex distributed systems such as
enterprise systems, grids, virtual enterprises, and supply chains. Unfortunately, this architecture as it is currently defined and being used, suffers from serious problems as outlined below. First, there is no means to ensure that a fragmented and open system like a SOA-based system satisfies desired global constraints, or can establish any regularity over the system. Second, service providers can make their own commitments to clients. However, the SOA
methodology provides no guarantee to clients that the commitment made by a given server will be satisfied. Note that although service providers should have the freedom to specify their own commitments, they must conform to the global constraints imposed at large, and
such conformity must be enforced. Third, when using a composite service, clients indirectly communicate with services via an orchestrator. Such indirect interaction may cause concerns
for both clients and services, but no formal mechanism has been designed to address those concerns. Finally, it is not possible to ensure that coordination between disparate servers—called ”choreography” under SOA— is carried out safely and correctly. The overarching goal of my dissertation is to design a regulatory mechanism to address all these problems in a scalable manner. The mechanism is an extension of Law Governed Interaction (LGI) - a decentralized coordination and control mechanism for distributed systems. We call this mechanism ”LG-SOA”, for Law-Governed-SOA, which enables high expressive power, efficient enforcement, as well as good scalability. We will also present how LG-SOA can be applied to legacy systems. Case studies in the context of enterprise systems demonstrate the flexibility and applicability of this mechanism. Experiments show the overhead introduced by LG-SOA is relatively small, especially in the context of geographically distributed systems
like SOA-based systems. In sum, LGI-SOA is effective and versatile in making SOA-based systems more coherent and trustworthy.
Subject
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Topic
Service-oriented architecture (Computer science)
Identifier
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http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000065188
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Graduate School - New Brunswick Electronic Theses and Dissertations
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doi:10.7282/T30C4TQR
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ETD doctoral
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Rights
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The author owns the copyright to this work.
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Name
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Lam
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Tin
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Permission or license
DateTime
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2012-04-16 17:09:38
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Tin Lam
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Rutgers University. Graduate School - New Brunswick
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License
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Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
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2012-05-31
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2013-05-31
Type
Embargo
Detail
Access to this PDF has been restricted at the author's request. It will be publicly available after May 31st, 2013.
Copyright
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Copyright protected
Availability
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Open
Reason
Permission or license
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