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Behavioural specification of grid services with the KAoS Policy Language

Behavioural specification of grid services with the KAoS Policy Language
Behavioural specification of grid services with the KAoS Policy Language
Complex services in Service-Oriented Architectures such as the Grid typically require to be configured in multiple ways that cannot be anticipated by service designers; we illustrate this requirement by studying the myGrid registry, a Grid Registry capable of supporting annotations of service descriptions by third-party users. Instead, services have to be conceived so that they can be configured at deployment and run time. We argue that KAOS is a powerful and flexible language that can help define such configurations. Using our registry case study, we examine the requirements that the definition of such complex configurations brings on policy languages and explain how they can be satisfied. Specifically, we use role-value maps to express constraints between property values; we introduce a notion of PolicySet with associated parameters that support constraints within a well defined scope; finally, we define a notion of Context that allows us to refer to property values that were extant in past execution environments. Essentially, these concepts allow us to add constraints to values in policy definitions, to organise policies in coherent and structure blocks, and to refer to the execution history. The paper discusses these concepts and how they are implemented in a binding of the KAOS policy language to the myGrid Registry.
IEEE
Moreau, L.
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Bradshaw, J.
d28cf9b1-a510-4ca9-a96f-fbb8d3dbfdee
Breedy, M.
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Bunch, L.
3bd597d5-9ecf-48e7-8515-830b2e5d5e69
Johnson, M.
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Kulkarni, S.
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Lott, J.
87965e6f-3cd8-41cd-95a5-f51bfc8ee68d
Suri, N.
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Uszok, A.
b06bb612-a0bc-4827-a344-c3aee6fb4245
Moreau, L.
033c63dd-3fe9-4040-849f-dfccbe0406f8
Bradshaw, J.
d28cf9b1-a510-4ca9-a96f-fbb8d3dbfdee
Breedy, M.
623f9917-a2f9-443a-8d26-3fb758359d66
Bunch, L.
3bd597d5-9ecf-48e7-8515-830b2e5d5e69
Johnson, M.
f641d826-cdd9-48dd-a328-5faa2ff570ff
Kulkarni, S.
3fedd5b6-a5c6-45b3-bf79-6b950d0d82a1
Lott, J.
87965e6f-3cd8-41cd-95a5-f51bfc8ee68d
Suri, N.
7e745e6f-2435-4896-8b68-a7310ada4cbc
Uszok, A.
b06bb612-a0bc-4827-a344-c3aee6fb4245

Moreau, L., Bradshaw, J., Breedy, M., Bunch, L., Johnson, M., Kulkarni, S., Lott, J., Suri, N. and Uszok, A. (2005) Behavioural specification of grid services with the KAoS Policy Language. In CCGrid 2005. IEEE International Symposium on Cluster Computing and the Grid, 2005. IEEE.. (doi:10.1109/CCGRID.2005.1558646).

Record type: Conference or Workshop Item (Paper)

Abstract

Complex services in Service-Oriented Architectures such as the Grid typically require to be configured in multiple ways that cannot be anticipated by service designers; we illustrate this requirement by studying the myGrid registry, a Grid Registry capable of supporting annotations of service descriptions by third-party users. Instead, services have to be conceived so that they can be configured at deployment and run time. We argue that KAOS is a powerful and flexible language that can help define such configurations. Using our registry case study, we examine the requirements that the definition of such complex configurations brings on policy languages and explain how they can be satisfied. Specifically, we use role-value maps to express constraints between property values; we introduce a notion of PolicySet with associated parameters that support constraints within a well defined scope; finally, we define a notion of Context that allows us to refer to property values that were extant in past execution environments. Essentially, these concepts allow us to add constraints to values in policy definitions, to organise policies in coherent and structure blocks, and to refer to the execution history. The paper discusses these concepts and how they are implemented in a binding of the KAOS policy language to the myGrid Registry.

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Published date: May 2005
Organisations: Web & Internet Science

Identifiers

Local EPrints ID: 261142
URI: https://eprints.soton.ac.uk/id/eprint/261142
PURE UUID: 872c18c6-1b75-46cd-8bf5-8ec0dde91e1a
ORCID for L. Moreau: ORCID iD orcid.org/0000-0002-3494-120X

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Date deposited: 10 Aug 2005
Last modified: 20 Jul 2019 01:17

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