2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2019 Nordix Foundation.
4 * Modifications Copyright (C) 2019 AT&T Intellectual Property.
5 * ================================================================================
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
18 * SPDX-License-Identifier: Apache-2.0
19 * ============LICENSE_END=========================================================
22 package org.onap.policy.pap.main.startstop;
24 import java.util.Arrays;
25 import java.util.Properties;
26 import java.util.concurrent.atomic.AtomicReference;
27 import org.onap.policy.common.endpoints.event.comm.TopicEndpointManager;
28 import org.onap.policy.common.endpoints.event.comm.TopicSource;
29 import org.onap.policy.common.endpoints.http.server.RestServer;
30 import org.onap.policy.common.endpoints.listeners.MessageTypeDispatcher;
31 import org.onap.policy.common.endpoints.listeners.RequestIdDispatcher;
32 import org.onap.policy.common.parameters.ParameterService;
33 import org.onap.policy.common.utils.services.Registry;
34 import org.onap.policy.common.utils.services.ServiceManagerContainer;
35 import org.onap.policy.models.pdp.concepts.PdpStatus;
36 import org.onap.policy.models.pdp.enums.PdpMessageType;
37 import org.onap.policy.pap.main.PapConstants;
38 import org.onap.policy.pap.main.PolicyModelsProviderFactoryWrapper;
39 import org.onap.policy.pap.main.PolicyPapRuntimeException;
40 import org.onap.policy.pap.main.comm.PdpHeartbeatListener;
41 import org.onap.policy.pap.main.comm.PdpModifyRequestMap;
42 import org.onap.policy.pap.main.comm.PdpTracker;
43 import org.onap.policy.pap.main.comm.Publisher;
44 import org.onap.policy.pap.main.comm.TimerManager;
45 import org.onap.policy.pap.main.parameters.PapParameterGroup;
46 import org.onap.policy.pap.main.parameters.PdpModifyRequestMapParams;
47 import org.onap.policy.pap.main.parameters.PdpParameters;
48 import org.onap.policy.pap.main.rest.HealthCheckRestControllerV1;
49 import org.onap.policy.pap.main.rest.PapAafFilter;
50 import org.onap.policy.pap.main.rest.PapStatisticsManager;
51 import org.onap.policy.pap.main.rest.PdpGroupHealthCheckControllerV1;
52 import org.onap.policy.pap.main.rest.PdpGroupQueryControllerV1;
53 import org.onap.policy.pap.main.rest.PdpGroupStateChangeControllerV1;
54 import org.onap.policy.pap.main.rest.StatisticsRestControllerV1;
55 import org.onap.policy.pap.main.rest.depundep.PdpGroupDeleteControllerV1;
56 import org.onap.policy.pap.main.rest.depundep.PdpGroupDeployControllerV1;
59 * This class activates Policy Administration (PAP) as a complete service together with all its controllers, listeners &
62 * @author Ram Krishna Verma (ram.krishna.verma@est.tech)
64 public class PapActivator extends ServiceManagerContainer {
65 private static final String[] MSG_TYPE_NAMES = { "messageName" };
66 private static final String[] REQ_ID_NAMES = { "response", "responseTo" };
69 * Max number of heat beats that can be missed before PAP removes a PDP.
71 private static final int MAX_MISSED_HEARTBEATS = 3;
73 private final PapParameterGroup papParameterGroup;
76 * Listens for messages on the topic, decodes them into a {@link PdpStatus} message, and then dispatches them to
77 * {@link #reqIdDispatcher}.
79 private final MessageTypeDispatcher msgDispatcher;
82 * Listens for {@link PdpStatus} messages and then routes them to the listener associated with the ID of the
83 * originating request.
85 private final RequestIdDispatcher<PdpStatus> reqIdDispatcher;
88 * Listener for anonymous {@link PdpStatus} messages either for registration or heartbeat.
90 private final PdpHeartbeatListener pdpHeartbeatListener;
93 * Instantiate the activator for policy pap as a complete service.
95 * @param papParameterGroup the parameters for the pap service
96 * @param topicProperties properties used to configure the topics
98 public PapActivator(final PapParameterGroup papParameterGroup, final Properties topicProperties) {
101 TopicEndpointManager.getManager().addTopicSinks(topicProperties);
102 TopicEndpointManager.getManager().addTopicSources(topicProperties);
105 this.papParameterGroup = papParameterGroup;
106 this.msgDispatcher = new MessageTypeDispatcher(MSG_TYPE_NAMES);
107 this.reqIdDispatcher = new RequestIdDispatcher<>(PdpStatus.class, REQ_ID_NAMES);
108 this.pdpHeartbeatListener = new PdpHeartbeatListener();
110 } catch (final RuntimeException e) {
111 throw new PolicyPapRuntimeException(e);
114 papParameterGroup.getRestServerParameters().setName(papParameterGroup.getName());
116 final Object pdpUpdateLock = new Object();
117 final PdpParameters pdpParams = papParameterGroup.getPdpParameters();
118 final AtomicReference<Publisher> pdpPub = new AtomicReference<>();
119 final AtomicReference<TimerManager> pdpUpdTimers = new AtomicReference<>();
120 final AtomicReference<TimerManager> pdpStChgTimers = new AtomicReference<>();
121 final AtomicReference<TimerManager> heartBeatTimers = new AtomicReference<>();
122 final AtomicReference<PolicyModelsProviderFactoryWrapper> daoFactory = new AtomicReference<>();
123 final AtomicReference<PdpModifyRequestMap> requestMap = new AtomicReference<>();
124 final AtomicReference<RestServer> restServer = new AtomicReference<>();
127 addAction("PAP parameters",
128 () -> ParameterService.register(papParameterGroup),
129 () -> ParameterService.deregister(papParameterGroup.getName()));
131 addAction("DAO Factory",
132 () -> daoFactory.set(new PolicyModelsProviderFactoryWrapper(
133 papParameterGroup.getDatabaseProviderParameters())),
134 () -> daoFactory.get().close());
136 addAction("DAO Factory registration",
137 () -> Registry.register(PapConstants.REG_PAP_DAO_FACTORY, daoFactory.get()),
138 () -> Registry.unregister(PapConstants.REG_PAP_DAO_FACTORY));
140 addAction("Pdp Heartbeat Listener",
141 () -> reqIdDispatcher.register(pdpHeartbeatListener),
142 () -> reqIdDispatcher.unregister(pdpHeartbeatListener));
144 addAction("Request ID Dispatcher",
145 () -> msgDispatcher.register(PdpMessageType.PDP_STATUS.name(), this.reqIdDispatcher),
146 () -> msgDispatcher.unregister(PdpMessageType.PDP_STATUS.name()));
148 addAction("Message Dispatcher",
149 this::registerMsgDispatcher,
150 this::unregisterMsgDispatcher);
153 TopicEndpointManager.getManager()::start,
154 TopicEndpointManager.getManager()::shutdown);
156 addAction("PAP statistics",
157 () -> Registry.register(PapConstants.REG_STATISTICS_MANAGER, new PapStatisticsManager()),
158 () -> Registry.unregister(PapConstants.REG_STATISTICS_MANAGER));
160 addAction("PDP publisher",
162 pdpPub.set(new Publisher(PapConstants.TOPIC_POLICY_PDP_PAP));
163 startThread(pdpPub.get());
165 () -> pdpPub.get().stop());
167 addAction("PDP heart beat timers",
169 long maxWaitHeartBeatMs = MAX_MISSED_HEARTBEATS * pdpParams.getHeartBeatMs();
170 heartBeatTimers.set(new TimerManager("heart beat", maxWaitHeartBeatMs));
171 startThread(heartBeatTimers.get());
173 () -> heartBeatTimers.get().stop());
175 addAction("PDP update timers",
177 pdpUpdTimers.set(new TimerManager("update", pdpParams.getUpdateParameters().getMaxWaitMs()));
178 startThread(pdpUpdTimers.get());
180 () -> pdpUpdTimers.get().stop());
182 addAction("PDP state-change timers",
184 pdpStChgTimers.set(new TimerManager("state-change", pdpParams.getUpdateParameters().getMaxWaitMs()));
185 startThread(pdpStChgTimers.get());
187 () -> pdpStChgTimers.get().stop());
189 addAction("PDP modification lock",
190 () -> Registry.register(PapConstants.REG_PDP_MODIFY_LOCK, pdpUpdateLock),
191 () -> Registry.unregister(PapConstants.REG_PDP_MODIFY_LOCK));
193 addAction("PDP modification requests",
195 requestMap.set(new PdpModifyRequestMap(
196 new PdpModifyRequestMapParams()
197 .setDaoFactory(daoFactory.get())
198 .setModifyLock(pdpUpdateLock)
199 .setParams(pdpParams)
200 .setPublisher(pdpPub.get())
201 .setResponseDispatcher(reqIdDispatcher)
202 .setStateChangeTimers(pdpStChgTimers.get())
203 .setUpdateTimers(pdpUpdTimers.get())));
204 Registry.register(PapConstants.REG_PDP_MODIFY_MAP, requestMap.get());
206 () -> Registry.unregister(PapConstants.REG_PDP_MODIFY_MAP));
208 addAction("PDP heart beat tracker",
209 () -> Registry.register(PapConstants.REG_PDP_TRACKER, PdpTracker.builder()
210 .daoFactory(daoFactory.get())
211 .timers(heartBeatTimers.get())
212 .modifyLock(pdpUpdateLock)
213 .requestMap(requestMap.get())
215 () -> Registry.unregister(PapConstants.REG_PDP_TRACKER));
217 addAction("REST server",
219 RestServer server = new RestServer(papParameterGroup.getRestServerParameters(), PapAafFilter.class,
220 HealthCheckRestControllerV1.class,
221 StatisticsRestControllerV1.class,
222 PdpGroupDeployControllerV1.class,
223 PdpGroupDeleteControllerV1.class,
224 PdpGroupStateChangeControllerV1.class,
225 PdpGroupQueryControllerV1.class,
226 PdpGroupHealthCheckControllerV1.class);
227 restServer.set(server);
228 restServer.get().start();
230 () -> restServer.get().stop());
235 * Starts a background thread.
237 * @param runner function to run in the background
239 private void startThread(final Runnable runner) {
240 final Thread thread = new Thread(runner);
241 thread.setDaemon(true);
247 * Get the parameters used by the activator.
249 * @return the parameters of the activator
251 public PapParameterGroup getParameterGroup() {
252 return papParameterGroup;
256 * Registers the dispatcher with the topic source(s).
258 private void registerMsgDispatcher() {
259 for (final TopicSource source : TopicEndpointManager.getManager()
260 .getTopicSources(Arrays.asList(PapConstants.TOPIC_POLICY_PDP_PAP))) {
261 source.register(msgDispatcher);
266 * Unregisters the dispatcher from the topic source(s).
268 private void unregisterMsgDispatcher() {
269 for (final TopicSource source : TopicEndpointManager.getManager()
270 .getTopicSources(Arrays.asList(PapConstants.TOPIC_POLICY_PDP_PAP))) {
271 source.unregister(msgDispatcher);