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Policy Centralization (Erl)

How can policies be normalized and consistently enforced across multiple services?

Policy Centralization

Problem

Policies that apply to multiple services can introduce redundancy and inconsistency within service logic and contracts.

Solution

Global or domain-specific policies can be isolated and applied to multiple services.

Application

Up-front analysis effort specific to defining and establishing reusable policies is recommended, and an appropriate policy enforcement framework is required.

Impacts

Policy frameworks can introduce performance overhead and may impose dependencies on proprietary technologies. There is also the risk of conflict between centralized and service-specific policies.

Architecture

Inventory, Service

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Basic WS-Policy
Advanced WS-Policy

Policy Centralization: A global policy definition (Corporate Policy.xml) is established and applies to all WSDL documents, and a further domain policy (Claims Policy.xml) is created and linked to two WSDL definitions. This new policy structure eliminates redundancy of policy content and ensures consistent policy enforcement.

A global policy definition (Corporate Policy.xml) is established and applies to all WSDL documents, and a further domain policy (Claims Policy.xml) is created and linked to two WSDL definitions. This new policy structure eliminates redundancy of policy content and ensures consistent policy enforcement.

Module 7: Advanced SOA Design & Architecture with Services & Microservices

This pattern is covered in SOACP Module 7: Advanced SOA Design & Architecture with Services & Microservices.

For more information regarding the SOA Certified Pofessional (SOACP) curriculum,
visit www.arcitura.com/soa.

SOA Design Patterns

This page contains excerpts from:

SOA Design Patterns by Thomas Erl

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

For more information about this book, visit www.arcitura.com/books.

Web Service Contract Design and Versioning for SOA

This page contains excerpts from:

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

For more information about this book, visit www.arcitura.com/books.