WS-Coordination is a new specification prepared by a group of software product manufacturers. The group includes big names like Microsoft, IBM, BEA, and others. The specification attempts to address the situation where relatively large number of participants get engaged in complete a unit of business processing, which may be composed of serveral long-lived activities at different ends.
WS-Coordination does not address how transaction should be completed, but it sets the stage on which transaction specific activities can be conducted.
The model of this specification is based on three simple services:
1. Activation Service - this allows creation of an instance of a coordinator or creation of a context of a coordinator instance
2. Registration Service - this allows the individual applications to register for coordination
3. A set of coordination protocols - this is an extension provision to allow different protocols for different purposes
So, if we try to look into the specific components within a coordinator, we will see an activation service, a registration service, and one or more protocol services based on how many protocols are in use.
Depending upon how disparate are the applications are, there may be multiple coordinators to facilitate the operations between two applications. One additional namespace has been defined: wscoor.
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