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.ControlLoopAck;
36 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ControlLoopStateChange;
37 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ControlLoopUpdate;
38 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantDeregister;
39 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantDeregisterAck;
40 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantMessage;
41 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantMessageType;
42 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantRegister;
43 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantRegisterAck;
44 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantResponseStatus;
45 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantStatus;
46 import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantStatusReq;
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 health check event from clamp.
103 * @param participantStatusReqMsg participant participantStatusReq message
105 public void handleParticipantStatusReq(final ParticipantStatusReq participantStatusReqMsg) {
106 ParticipantStatus participantStatus = new ParticipantStatus();
107 participantStatus.setParticipantId(participantId);
108 participantStatus.setParticipantStatistics(participantStatistics);
109 participantStatus.setParticipantType(participantType);
110 participantStatus.setHealthStatus(healthStatus);
111 sender.sendParticipantStatus(participantStatus);
115 * Handle a control loop update message.
117 * @param updateMsg the update message
119 public void handleControlLoopUpdate(ControlLoopUpdate updateMsg) {
120 controlLoopHandler.handleControlLoopUpdate(updateMsg, clElementDefsOnThisParticipant);
124 * Handle a control loop state change message.
126 * @param stateChangeMsg the state change message
128 public void handleControlLoopStateChange(ControlLoopStateChange stateChangeMsg) {
129 controlLoopHandler.handleControlLoopStateChange(stateChangeMsg);
132 private void handleStateChange(ParticipantState newParticipantState, ParticipantUpdateAck response) {
133 if (state.equals(newParticipantState)) {
134 response.setResult(false);
135 response.setMessage("Participant already in state " + newParticipantState);
137 response.setResult(true);
138 response.setMessage("Participant state changed from " + state + " to " + newParticipantState);
139 state = newParticipantState;
144 * Method to update participant state.
146 * @param definition participant definition
147 * @param participantState participant state
148 * @return the participant
150 public Participant updateParticipantState(ToscaConceptIdentifier definition, ParticipantState participantState) {
151 if (!Objects.equals(definition, participantId)) {
152 LOGGER.debug("No participant with this ID {}", definition.getName());
156 var participantUpdateAck = new ParticipantUpdateAck();
157 handleStateChange(participantState, participantUpdateAck);
158 sender.sendParticipantUpdateAck(participantUpdateAck);
159 return getParticipant(definition.getName(), definition.getVersion());
163 * Get participants as a {@link Participant} class.
165 * @param name the participant name to get
166 * @param version the version of the participant to get
167 * @return the participant
169 public Participant getParticipant(String name, String version) {
170 if (participantId.getName().equals(name)) {
171 var participant = new Participant();
172 participant.setDefinition(participantId);
173 participant.setParticipantState(state);
174 participant.setHealthStatus(healthStatus);
181 * Check if a participant message applies to this participant handler.
183 * @param participantMsg the message to check
184 * @return true if it applies, false otherwise
186 public boolean appliesTo(ParticipantMessage participantMsg) {
187 return participantMsg.appliesTo(participantType, participantId);
191 * Method to send ParticipantRegister message to controlloop runtime.
193 public void sendParticipantRegister() {
194 var participantRegister = new ParticipantRegister();
195 participantRegister.setParticipantId(participantId);
196 participantRegister.setParticipantType(participantType);
198 sender.sendParticipantRegister(participantRegister);
202 * Handle a participantRegister Ack message.
204 * @param participantRegisterAckMsg the participantRegisterAck message
206 public void handleParticipantRegisterAck(ParticipantRegisterAck participantRegisterAckMsg) {
207 LOGGER.debug("ParticipantRegisterAck message received as responseTo {}",
208 participantRegisterAckMsg.getResponseTo());
212 * Method to send ParticipantDeregister message to controlloop runtime.
214 public void sendParticipantDeregister() {
215 var participantDeregister = new ParticipantDeregister();
216 participantDeregister.setParticipantId(participantId);
217 participantDeregister.setParticipantType(participantType);
219 sender.sendParticipantDeregister(participantDeregister);
223 * Handle a participantDeregister Ack message.
225 * @param participantDeregisterAckMsg the participantDeregisterAck message
227 public void handleParticipantDeregisterAck(ParticipantDeregisterAck participantDeregisterAckMsg) {
228 LOGGER.debug("ParticipantDeregisterAck message received as responseTo {}",
229 participantDeregisterAckMsg.getResponseTo());
233 * Handle a ParticipantUpdate message.
235 * @param participantUpdateMsg the ParticipantUpdate message
237 public void handleParticipantUpdate(ParticipantUpdate participantUpdateMsg) {
238 LOGGER.debug("ParticipantUpdate message received for participantId {}",
239 participantUpdateMsg.getParticipantId());
241 if (!participantUpdateMsg.appliesTo(participantType, participantId)) {
245 Map<UUID, ControlLoopElementDefinition> clDefinitionMap =
246 participantUpdateMsg.getParticipantDefinitionUpdateMap().get(participantUpdateMsg.getParticipantId());
248 for (ControlLoopElementDefinition element : clDefinitionMap.values()) {
249 clElementDefsOnThisParticipant.put(element.getId(), element);
252 sendParticipantUpdateAck(participantUpdateMsg.getMessageId());
256 * Method to send ParticipantUpdateAck message to controlloop runtime.
258 public void sendParticipantUpdateAck(UUID messageId) {
259 var participantUpdateAck = new ParticipantUpdateAck();
260 participantUpdateAck.setResponseTo(messageId);
261 participantUpdateAck.setMessage("Participant Update Ack message");
262 participantUpdateAck.setResult(true);
263 participantUpdateAck.setParticipantId(participantId);
264 participantUpdateAck.setParticipantType(participantType);
266 sender.sendParticipantUpdateAck(participantUpdateAck);
270 * Method to send heartbeat to controlloop runtime.
272 public ParticipantStatus makeHeartbeat() {
273 ParticipantStatus heartbeat = new ParticipantStatus();
274 heartbeat.setParticipantId(participantId);
275 heartbeat.setParticipantStatistics(participantStatistics);
276 heartbeat.setParticipantType(participantType);
277 heartbeat.setHealthStatus(healthStatus);