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mercredi, 28 février 2007
10 design principles and SOA
Following my publication about generic design principles, I stumbled upon this article from Stefan Tilkov on InfoQ about 10 principles of SOA.
For each principle of SOA, here is my parallels :
- “Explicit boundaries” : every service should be auto-sufficient and not depend on a shared context. In brief, it is the principle of state reducing.
- “Shared Contract and Schema, not Class“ : Minimize the structural dependencies, here by using XML document.
- “Policy-driven“ : This principle describe the agreement between a provider and a consumer, from a functional point of view as well as a technical one. I did not describe this notion, especially the technical one, as this a SOA foundation principle : the accommodation to heterogeneous technical environment.
- “Autonomous” : here I would say rather protection des variations.
- “Wire formats, not Programming Language APIs“, “Document-oriented“, “Loosely coupled“, “Standards-compliant“, “Vendor independent” : all these principles deals with minimizing dependencies with : the use of standard format and protocol (XML, http), evolutive data format, use of standard and not using proprietary features.
- “Metadata-driven” : use of registry and if possible self-description of services by their naming.
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Posted at 11:53 PM in en/Architecture/
