2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2021 Nordix Foundation.
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 * SPDX-License-Identifier: Apache-2.0
18 * ============LICENSE_END=========================================================
21 package org.onap.policy.clamp.controlloop.participant.intermediary.handler;
23 import java.io.Closeable;
24 import java.util.LinkedHashMap;
26 import java.util.Objects;
27 import java.util.UUID;
30 import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ControlLoopElementDefinition;
31 import org.onap.policy.clamp.controlloop.models.controlloop.concepts.Participant;
32 import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ParticipantHealthStatus;
33 import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ParticipantState;
34 import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ParticipantStatistics;
35 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ControlLoopUpdate;
36 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantControlLoopStateChange;
37 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantDeregister;
38 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantDeregisterAck;
39 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantHealthCheck;
40 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantMessage;
41 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantRegister;
42 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantRegisterAck;
43 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantResponseDetails;
44 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantResponseStatus;
45 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantStateChange;
46 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantStatus;
47 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantUpdate;
48 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantUpdateAck;
49 import org.onap.policy.clamp.controlloop.participant.intermediary.comm.MessageSender;
50 import org.onap.policy.clamp.controlloop.participant.intermediary.comm.ParticipantMessagePublisher;
51 import org.onap.policy.clamp.controlloop.participant.intermediary.parameters.ParticipantParameters;
52 import org.onap.policy.models.tosca.authorative.concepts.ToscaConceptIdentifier;
53 import org.slf4j.Logger;
54 import org.slf4j.LoggerFactory;
55 import org.springframework.stereotype.Component;
58 * This class is responsible for managing the state of a participant.
62 public class ParticipantHandler implements Closeable {
63 private static final Logger LOGGER = LoggerFactory.getLogger(ParticipantHandler.class);
65 private final ToscaConceptIdentifier participantType;
66 private final ToscaConceptIdentifier participantId;
67 private final MessageSender sender;
68 private final ControlLoopHandler controlLoopHandler;
69 private final ParticipantStatistics participantStatistics;
72 private ParticipantState state = ParticipantState.UNKNOWN;
75 private ParticipantHealthStatus healthStatus = ParticipantHealthStatus.UNKNOWN;
77 private final Map<UUID, ControlLoopElementDefinition> clElementDefsOnThisParticipant = new LinkedHashMap<>();
80 * Constructor, set the participant ID and sender.
82 * @param parameters the parameters of the participant
83 * @param publisher the publisher for sending responses to messages
85 public ParticipantHandler(ParticipantParameters parameters, ParticipantMessagePublisher publisher) {
86 this.participantType = parameters.getIntermediaryParameters().getParticipantType();
87 this.participantId = parameters.getIntermediaryParameters().getParticipantId();
89 new MessageSender(this, publisher,
90 parameters.getIntermediaryParameters().getReportingTimeIntervalMs());
91 this.controlLoopHandler = new ControlLoopHandler(parameters.getIntermediaryParameters(), sender);
92 this.participantStatistics = new ParticipantStatistics();
101 * Method which handles a participant state change event from clamp.
103 * @param stateChangeMsg participant state change message
105 public void handleParticipantStateChange(final ParticipantStateChange stateChangeMsg) {
107 if (!stateChangeMsg.appliesTo(participantType, participantId)) {
111 var response = new ParticipantResponseDetails(stateChangeMsg);
113 switch (stateChangeMsg.getState()) {
115 handlePassiveState(response);
118 handleActiveState(response);
121 handleSafeState(response);
124 handleTestState(response);
127 handleTerminatedState(response);
130 LOGGER.debug("StateChange message has no state, state is null {}", stateChangeMsg.getParticipantId());
131 response.setResponseStatus(ParticipantResponseStatus.FAIL);
132 response.setResponseMessage(
133 "StateChange message has invalid state for participantId " + stateChangeMsg.getParticipantId());
137 sender.sendResponse(response);
141 * Method which handles a participant health check event from clamp.
143 * @param healthCheckMsg participant health check message
145 public void handleParticipantHealthCheck(final ParticipantHealthCheck healthCheckMsg) {
146 var response = new ParticipantResponseDetails(healthCheckMsg);
147 response.setResponseStatus(ParticipantResponseStatus.SUCCESS);
148 response.setResponseMessage(healthStatus.toString());
150 sender.sendResponse(response);
154 * Handle a control loop update message.
156 * @param updateMsg the update message
158 public void handleControlLoopUpdate(ControlLoopUpdate updateMsg) {
159 controlLoopHandler.handleControlLoopUpdate(updateMsg);
163 * Handle a control loop state change message.
165 * @param stateChangeMsg the state change message
167 public void handleControlLoopStateChange(ParticipantControlLoopStateChange stateChangeMsg) {
168 controlLoopHandler.handleControlLoopStateChange(stateChangeMsg);
172 * Method to handle when the new state from participant is active.
174 * @param response participant response
176 private void handleActiveState(final ParticipantResponseDetails response) {
177 handleStateChange(ParticipantState.ACTIVE, response);
181 * Method to handle when the new state from participant is passive.
183 * @param response participant response
185 private void handlePassiveState(final ParticipantResponseDetails response) {
186 handleStateChange(ParticipantState.PASSIVE, response);
190 * Method to handle when the new state from participant is safe.
192 * @param response participant response
194 private void handleSafeState(final ParticipantResponseDetails response) {
195 handleStateChange(ParticipantState.SAFE, response);
199 * Method to handle when the new state from participant is TEST.
201 * @param response participant response
203 private void handleTestState(final ParticipantResponseDetails response) {
204 handleStateChange(ParticipantState.TEST, response);
208 * Method to handle when the new state from participant is Terminated.
210 * @param response participant response
212 private void handleTerminatedState(final ParticipantResponseDetails response) {
213 handleStateChange(ParticipantState.TERMINATED, response);
216 private void handleStateChange(ParticipantState newParticipantState, ParticipantResponseDetails response) {
217 if (state.equals(newParticipantState)) {
218 response.setResponseStatus(ParticipantResponseStatus.SUCCESS);
219 response.setResponseMessage("Participant already in state " + newParticipantState);
221 response.setResponseStatus(ParticipantResponseStatus.SUCCESS);
222 response.setResponseMessage("Participant state changed from " + state + " to " + newParticipantState);
223 state = newParticipantState;
228 * Method to update participant state.
230 * @param definition participant definition
231 * @param participantState participant state
232 * @return the participant
234 public Participant updateParticipantState(ToscaConceptIdentifier definition, ParticipantState participantState) {
235 if (!Objects.equals(definition, participantId)) {
236 LOGGER.debug("No participant with this ID {}", definition.getName());
239 var response = new ParticipantResponseDetails();
240 handleStateChange(participantState, response);
241 sender.sendResponse(response);
242 return getParticipant(definition.getName(), definition.getVersion());
246 * Get participants as a {@link Participant} class.
248 * @param name the participant name to get
249 * @param version the version of the participant to get
250 * @return the participant
252 public Participant getParticipant(String name, String version) {
253 if (participantId.getName().equals(name)) {
254 var participant = new Participant();
255 participant.setDefinition(participantId);
256 participant.setParticipantState(state);
257 participant.setHealthStatus(healthStatus);
264 * Check if a participant message applies to this participant handler.
266 * @param participantMsg the message to check
267 * @return true if it applies, false otherwise
269 public boolean appliesTo(ParticipantMessage participantMsg) {
270 return participantMsg.appliesTo(participantType, participantId);
274 * Method to send ParticipantRegister message to controlloop runtime.
276 public void sendParticipantRegister() {
277 var participantRegister = new ParticipantRegister();
278 participantRegister.setParticipantId(participantId);
279 participantRegister.setParticipantType(participantType);
281 sender.sendParticipantRegister(participantRegister);
285 * Handle a participantRegister Ack message.
287 * @param participantRegisterAckMsg the participantRegisterAck message
289 public void handleParticipantRegisterAck(ParticipantRegisterAck participantRegisterAckMsg) {
290 LOGGER.debug("ParticipantRegisterAck message received as responseTo {}",
291 participantRegisterAckMsg.getResponseTo());
295 * Method to send ParticipantDeregister message to controlloop runtime.
297 public void sendParticipantDeregister() {
298 var participantDeregister = new ParticipantDeregister();
299 participantDeregister.setParticipantId(participantId);
300 participantDeregister.setParticipantType(participantType);
302 sender.sendParticipantDeregister(participantDeregister);
306 * Handle a participantDeregister Ack message.
308 * @param participantDeregisterAckMsg the participantDeregisterAck message
310 public void handleParticipantDeregisterAck(ParticipantDeregisterAck participantDeregisterAckMsg) {
311 LOGGER.debug("ParticipantDeregisterAck message received as responseTo {}",
312 participantDeregisterAckMsg.getResponseTo());
316 * Handle a ParticipantUpdate message.
318 * @param participantUpdateMsg the ParticipantUpdate message
320 public void handleParticipantUpdate(ParticipantUpdate participantUpdateMsg) {
321 LOGGER.debug("ParticipantUpdate message received for participantId {}",
322 participantUpdateMsg.getParticipantId());
324 if (!participantUpdateMsg.appliesTo(participantType, participantId)) {
328 Map<UUID, ControlLoopElementDefinition> clDefinitionMap =
329 participantUpdateMsg.getParticipantDefinitionUpdateMap().get(participantUpdateMsg.getParticipantId());
331 for (ControlLoopElementDefinition element : clDefinitionMap.values()) {
332 clElementDefsOnThisParticipant.put(element.getId(), element);
335 sendParticipantUpdateAck(participantUpdateMsg.getMessageId());
339 * Method to send ParticipantUpdateAck message to controlloop runtime.
341 public void sendParticipantUpdateAck(UUID messageId) {
342 var participantUpdateAck = new ParticipantUpdateAck();
343 participantUpdateAck.setResponseTo(messageId);
344 participantUpdateAck.setMessage("Participant Update Ack message");
345 participantUpdateAck.setResult(true);
347 sender.sendParticipantUpdateAck(participantUpdateAck);
351 * Method to send heartbeat to controlloop runtime.
353 public ParticipantStatus makeHeartbeat() {
354 ParticipantStatus heartbeat = new ParticipantStatus();
355 heartbeat.setParticipantId(participantId);
356 heartbeat.setParticipantStatistics(participantStatistics);
357 heartbeat.setParticipantType(participantType);
358 heartbeat.setHealthStatus(healthStatus);
359 heartbeat.setMessage("Participant heartbeat message sent from -> " + participantId.getName());