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Mediation policy control of service requests
You can use mediation policies to control mediation flows between service requesters and service providers.
You can control mediation flows using mediation policies stored in IBM WebSphere Service Registry and Repository (WSRR). The implementation of service policy management in WSRR is based on the Web Services Policy Framework (WS-Policy).
In order to control service requests using mediation policies, you must have suitable SCA modules and mediation policy documents in your WSRR registry.
How to attach a mediation policy to a service request
When you develop an SCA module that needs to make use of a mediation policy, you must include a Policy Resolution mediation primitive in the mediation flow. At run time, the Policy Resolution mediation primitive obtains mediation policy information from the registry. Therefore, an SCA module must contain a mediation flow component in order to support mediation policy control of service requests.
In the registry, you can attach one or more mediation policies to an SCA module, or to a target service used by the SCA module. Attached mediation policies could be used (are in scope) for all service messages processed by that SCA module. The mediation policies can have policy attachments that define conditions. Mediation policy conditions allow different mediation policies to apply in different contexts. In addition, mediation policies can have classifications, which can be used to specify a governance state.