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authoradheli.tavares <adheli.tavares@est.tech>2022-03-31 10:31:36 +0100
committeradheli.tavares <adheli.tavares@est.tech>2022-03-31 10:32:07 +0100
commit96f544440333fb59fcc45fb9f53346e2320bc9bb (patch)
tree32584ae289aeb76dd416d8c7299af61a0e57e00d /docs/clamp/controlloop/design-impl/participants/participant-intermediary.rst
parent178dea1eb3eb979994d8b99f317f536b85435b60 (diff)
Reestructuring the clamp doc tree
Issue-ID: POLICY-3941 Change-Id: I116742a732789a2737a00250849914aa30ad2fbf Signed-off-by: adheli.tavares <adheli.tavares@est.tech>
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-.. This work is licensed under a Creative Commons Attribution 4.0 International License.
-
-.. _clamp-controlloop-participant-intermediary:
-
-Participant Intermediary
-########################
-
-The CLAMP Participant Intermediary is a common library in ONAP, which does common message and
-state handling for participant implementations. It provides a Java API, which participant
-implementations implement to receive and send messages to the CLAMP runtime and to handle
-Control Loop Element state.
-
-Terminology
------------
-- Broadcast message: a message for all participants (participantId=null and participantType=null)
-- Message to a participant: a message only for a participant (participantId and participantType properly filled)
-- MessageSender: a class that takes care of sending messages from participant-intermediary
-- GUI: graphical user interface, Postman or a Front-End Application
-
-Inbound messages to participants
---------------------------------
-- PARTICIPANT_REGISTER_ACK: received as a response from controlloop runtime server as an acknowledgement to ParticipantRegister message sent from a participant
-- PARTICIPANT_DEREGISTER_ACK: received as a response from controlloop runtime server as an acknowledgement to ParticipantDeregister message sent from a participant
-- CONTROL_LOOP_STATE_CHANGE: a message received from controlloop runtime server for a state change of controlloop
-- CONTROL_LOOP_UPDATE: a message received from controlloop runtime server for a controlloop update with controlloop instances
-- PARTICIPANT_UPDATE: a message received from controlloop runtime server for a participant update with tosca definitions of controlloop
-- PARTICIPANT_STATUS_REQ: A status request received from controlloop runtime server to send an immediate ParticipantStatus from all participants
-
-Outbound messages
------------------
-- PARTICIPANT_REGISTER: is sent by a participant during startup
-- PARTICIPANT_DEREGISTER: is sent by a participant during shutdown
-- PARTICIPANT_STATUS: is sent by a participant as heartbeat with the status and health of a participant
-- CONTROLLOOP_STATECHANGE_ACK: is an acknowledgement sent by a participant as a response to ControlLoopStateChange
-- CONTROLLOOP_UPDATE_ACK: is an acknowledgement sent by a participant as a response to ControlLoopUpdate
-- PARTICIPANT_UPDATE_ACK: is an acknowledgement sent by a participant as a response to ParticipantUpdate
-
-Design of a PARTICIPANT_REGISTER message
-----------------------------------------
-- A participant starts and send a PARTICIPANT_REGISTER message
-- ParticipantRegisterListener collects the message from DMaap
-- if participant is not present in DB, it saves participant reference with status UNKNOWN to DB
-- if participant is present in DB, it triggers the execution to send a PARTICIPANT_UPDATE message to the participant registered (message of Priming)
-- the message is built by ParticipantUpdatePublisher using Tosca Service Template data (to fill the list of ParticipantDefinition)
-- It triggers the execution to send a PARTICIPANT_REGISTER_ACK message to the participant registered
-- MessageIntercept intercepts that event, if PARTICIPANT_UPDATE message has been sent, it will be add a task to handle PARTICIPANT_REGISTER in SupervisionScanner
-- SupervisionScanner starts the monitoring for participantUpdate
-
-Design of a PARTICIPANT_DEREGISTER message
-------------------------------------------
-- A participant starts and send a PARTICIPANT_DEREGISTER message
-- ParticipantDeregisterListener collects the message from DMaap
-- if participant is not present in DB, do nothing
-- if participant is present in DB, it triggers the execution to send a PARTICIPANT_UPDATE message to the participant registered (message of DePriming)
-- the message is built by ParticipantUpdatePublisher using Tosca Service Template data as null
-- ParticipantHandler removes the tosca definitions stored
-- It triggers the execution to send a PARTICIPANT_DEREGISTER_ACK message to the participant registered
-- Participant is not monitored.
-
-Design of a creation of a Control Loop Type
--------------------------------------------
-- If there are participants registered with CL-runtime, it triggers the execution to send a broadcast PARTICIPANT_UPDATE message
-- the message is built by ParticipantUpdatePublisher using Tosca Service Template data (to fill the list of ParticipantDefinition)
-- Participant-intermediary will receive a PARTICIPANT_UDPATE message and stores the Tosca Service Template data on ParticipantHandler
-
-Design of a deletion of a Control Loop Type
--------------------------------------------
-- if there are participants registered, CL-runtime triggers the execution to send a broadcast PARTICIPANT_UPDATE message
-- the message is built by ParticipantUpdatePublisher with an empty list of ParticipantDefinition
-- It deletes the Control Loop Type from DB
-- Participant-intermediary will receive a PARTICIPANT_UDPATE message and deletes the Tosca Service Template data on ParticipantHandler
-
-Design of a creation of a Control Loop
---------------------------------------
-- CONTROL_LOOP_UPDATE message with instantiation details and UNINITIALISED state is sent to participants
-- Participant-intermediary validates the current state change
-- Participant-intermediary will recieve CONTROL_LOOP_UPDATE message and sends the details of ControlLoopElements to participants
-- Each participant performs its designated job of deployment by interacting with respective frameworks
-
-Design of a deletion of a Control Loop
---------------------------------------
-- CONTROL_LOOP_STATE_CHANGE message with UNINITIALISED state is sent to participants
-- Participant-intermediary validates the current state change
-- Participant-intermediary will recieve CONTROL_LOOP_STATE_CHANGE message and sends the details of ControlLoopElements to participants
-- Each participant performs its designated job of undeployment by interacting with respective frameworks
-
-Design of "issues control loop commands to control loops" - case UNINITIALISED to PASSIVE
------------------------------------------------------------------------------------------
-- CONTROL_LOOP_STATE_CHANGE message with state changed from UNINITIALISED to PASSIVE is sent to participants
-- Participant-intermediary validates the current state change
-- Participant-intermediary will recieve CONTROL_LOOP_STATE_CHANGE message and sends the details of state change to participants
-- Each participant performs its designated job of state change by interacting with respective frameworks
-
-Design of "issues control loop commands to control loops" - case PASSIVE to UNINITIALISED
------------------------------------------------------------------------------------------
-- CONTROL_LOOP_STATE_CHANGE message with state changed from PASSIVE to UNINITIALISED is sent to participants
-- Participant-intermediary validates the current state change
-- Participant-intermediary will recieve CONTROL_LOOP_STATE_CHANGE message and sends the details of state change to participants
-- Each participant performs its designated job of state change by interacting with respective frameworks
-
-Design of "issues control loop commands to control loops" - case PASSIVE to RUNNING
------------------------------------------------------------------------------------
-- CONTROL_LOOP_STATE_CHANGE message with state changed from PASSIVE to RUNNING is sent to participants
-- Participant-intermediary validates the current state change
-- Participant-intermediary will recieve CONTROL_LOOP_STATE_CHANGE message and sends the details of state change to participants
-- Each participant performs its designated job of state change by interacting with respective frameworks
-
-Design of "issues control loop commands to control loops" - case RUNNING to PASSIVE
------------------------------------------------------------------------------------
-- CONTROL_LOOP_STATE_CHANGE message with state changed from RUNNING to PASSIVE is sent to participants
-- Participant-intermediary validates the current state change
-- Participant-intermediary will recieve CONTROL_LOOP_STATE_CHANGE message and sends the details of state change to participants
-- Each participant performs its designated job of state change by interacting with respective frameworks
-
-Design of a PARTICIPANT_STATUS message
---------------------------------------
-- A participant sends a scheduled PARTICIPANT_STATUS message
-- This message will hold the state and healthStatus of all the participants running actively
-- PARTICIPANT_STATUS message holds a special attribute to return Tosca definitions, this attribute is populated only in response to PARTICIPANT_STATUS_REQ
-
-Design of a CONTROLLOOP_UPDATE_ACK message
-------------------------------------------
-- A participant sends CONTROLLOOP_UPDATE_ACK message in response to a CONTROLLOOP_UPDATE message.
-- For each CL-elements moved to the ordered state as indicated by the CONTROLLOOP_UPDATE
-- ControlLoopUpdateAckListener in CL-runtime collects the messages from DMaap
-- It checks the status of all control loop elements and checks if the control loop is primed
-- It updates the controlloop in DB accordingly
-
-Design of a CONTROLLOOP_STATECHANGE_ACK is similar to the design for CONTROLLOOP_UPDATE_ACK