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Termination Notification (Orchard, Riley)


Home > Service Governance Patterns > Termination Notification

How can the scheduled expiry of a service contract be
communicated to consumer programs?
 

Problem

Consumer programs may be unaware of when a service or a service contract version is scheduled for retirement, thereby risking runtime failure.

Solution

Service contracts can be designed to express termination information for programmatic and human consumption.

Application

Service contracts can be extended with ignorable policy assertions or supplemented with human-readable annotations.

Impacts

The syntax and conventions used to express termination information must be understood by service consumers in order for this information to be effectively used.

Principles

Standardized Service Contract

Architecture

Composition, Service
           
The service contract includes a standardized statement that communicates when it is scheduled for termination. As a result, the consumer does not attempt to invoke it after the contract has been terminated.
Audio Podcast
This pattern is discussed as part of the audio podcast:

•  Service Contract-Related
   SOA Design Patterns
•  Advanced Service
   Versioning
 

Related Patterns in This Catalog

Canonical Versioning (Erl), Compatible Change (Orchard, Riley), Proxy Capability (Erl)


Related Service-Oriented Computing Goals

Increased Federation, Reduced IT Burden

SOA Design Patterns This page contains excerpts from:

SOA Design Patterns by Thomas Erl

Foreword by Grady Booch

With contributions from David Chappell, Jason Hogg, Anish Karmarkar, Mark Little, David Orchard, Satadru Roy,
Thomas Rischbeck, Arnaud Simon, Clemens Utschig, Dennis Wisnosky, and others.

(ISBN: 0136135161, Hardcover, Full-Color, 400+ Illustrations, 865 pages)

For more information about this book, visit
www.soabooks.com.
Web Service Contract Design and Versioning for SOA This pattern is also discussed in the following title:

Web Service Contract Design and Versioning for SOA
by Thomas Erl, Anish Karmarkar, Priscilla Walmsley, Hugo Haas, Umit Yalcinalp, Canyang Kevin Liu,
David Orchard, Andre Tost, James Pasley

Foreword by David Chappell

(ISBN: 013613517X, Hardcover, 826 pages)

For more information about this book, visit
www.soabooks.com.
The Prentice Hall Service-Oriented Computing Series from Thomas Erl
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