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SOA : Data Inside and Data Outside

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Sudhakar Sadasivuni

Posts: 418
Nickname: sadasivuni
Registered: Nov, 2003

Sudhakar Sadasivuni is a Microsoft .NET MVP, a project engineer for Wipro technologies.

SOA : Data Inside and Data Outside

Posted: Sep 10, 2004 3:50 AM

This post originated from an RSS feed registered with .NET Buzz by Sudhakar Sadasivuni.
Original Post: SOA : Data Inside and Data Outside Feed Title: {Sudhakar's .NET Dump Yard;} Feed URL: http://www.asp.net/err404.htm?aspxerrorpath=/ssadasivuni/rss.aspx Feed Description: using Sudhakar.Dotnet.Blog.Main;	Latest .NET Buzz Posts Latest .NET Buzz Posts by Sudhakar Sadasivuni Latest Posts From {Sudhakar's .NET Dump Yard;}

A new article on SOA...Pat helland, architect of Microsoft explores services oriented architectur and differences between data inside and data outside the boundaries of service.

Pat has also listed the rules for sending data

01. Identify the messages

Always put a unique ID in every message

Part of the unique ID may be a version

02. Immutable Data

The data in a message must be immutable

Never change the contents of a message on retransmission

Always return the same bits

03. Ok to Cache

Since the ID of the message returns the same data, it is Ok to cache a message

The cache will never cause incorrectness

04. Define Valid Ranges

Define the valid ranges of space and time

Ok to always be valid

05. Must be Stable

Ensure the meaning of the message is unambiguous within the valid space and time

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