Sirisha Manchikanti and Robertas Rimkus to update.
The Policy Framework participant receives messages through participant-intermediary common code, and handles them by invoking REST APIs towards policy-framework.
For example, When a ControlLoopUpdate message is received by policy participant, it contains full ToscaServiceTemplate describing all components participating in a control loop. When the control loop element state changed from UNINITIALIZED to PASSIVE, Policy-participant triggers creation of policy-types and policies in Policy-Framework.
When the state changes from PASSIVE to UNINITIALIZED, Policy-Participant deletes the policies, policy-types by invoking REST APIs towards policy-framework.