Mediator in SOA Landscape
Mediator is built on the same run-time platform as Integration Server and provides enforcement of service policies that you define and manage in CentraSite. To perform this role, Mediator depends on virtual services that you create and manage in CentraSite. These virtual services are deployed to Mediator using virtual service definitions (VSDs). Once the virtual service is deployed, Mediator performs run-time policy enforcement on the virtual service. When Mediator receives requests, it forwards them to the service provider (if the request satisfies the service policy) and returns the response to the consumer.
The following diagram illustrates the run-time interactions of Mediator in the system:
Step | Description |
1 | A service consumer makes a call to a web service running on a service provider. |
2 | The virtual service running on Mediator receives and processes the message. |
3 | The message is sent to the service provider. |
4 | The service provider retrieves the required data or performs the required task. |
5 | The service provider, through the native service, sends the requested data back through Mediator to the consumer application. |
6 | Mediator sends monitoring data through SNMP traps to CentraSite throughout the process. |
