diff options
Diffstat (limited to 'runtime-controlloop/src/main/java/org/onap/policy/clamp/controlloop/runtime/supervision/SupervisionHandler.java')
| -rw-r--r-- | runtime-controlloop/src/main/java/org/onap/policy/clamp/controlloop/runtime/supervision/SupervisionHandler.java | 450 |
1 files changed, 450 insertions, 0 deletions
diff --git a/runtime-controlloop/src/main/java/org/onap/policy/clamp/controlloop/runtime/supervision/SupervisionHandler.java b/runtime-controlloop/src/main/java/org/onap/policy/clamp/controlloop/runtime/supervision/SupervisionHandler.java new file mode 100644 index 000000000..63bff00fc --- /dev/null +++ b/runtime-controlloop/src/main/java/org/onap/policy/clamp/controlloop/runtime/supervision/SupervisionHandler.java @@ -0,0 +1,450 @@ +/*- + * ============LICENSE_START======================================================= + * Copyright (C) 2021 Nordix Foundation. + * ================================================================================ + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * SPDX-License-Identifier: Apache-2.0 + * ============LICENSE_END========================================================= + */ + +package org.onap.policy.clamp.controlloop.runtime.supervision; + +import java.util.ArrayList; +import java.util.List; +import java.util.UUID; +import javax.ws.rs.core.Response; +import javax.ws.rs.core.Response.Status; +import org.apache.commons.collections4.CollectionUtils; +import org.onap.policy.clamp.controlloop.common.exception.ControlLoopException; +import org.onap.policy.clamp.controlloop.common.exception.ControlLoopRuntimeException; +import org.onap.policy.clamp.controlloop.common.handler.ControlLoopHandler; +import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ControlLoop; +import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ControlLoopElement; +import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ControlLoopState; +import org.onap.policy.clamp.controlloop.models.controlloop.concepts.Participant; +import org.onap.policy.clamp.controlloop.models.controlloop.persistence.provider.ControlLoopProvider; +import org.onap.policy.clamp.controlloop.models.controlloop.persistence.provider.ParticipantProvider; +import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantControlLoopStateChange; +import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantControlLoopUpdate; +import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantMessageType; +import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantStatus; +import org.onap.policy.clamp.controlloop.runtime.commissioning.CommissioningHandler; +import org.onap.policy.clamp.controlloop.runtime.commissioning.CommissioningProvider; +import org.onap.policy.clamp.controlloop.runtime.main.parameters.ClRuntimeParameterGroup; +import org.onap.policy.clamp.controlloop.runtime.monitoring.MonitoringHandler; +import org.onap.policy.clamp.controlloop.runtime.monitoring.MonitoringProvider; +import org.onap.policy.clamp.controlloop.runtime.supervision.comm.ParticipantControlLoopStateChangePublisher; +import org.onap.policy.clamp.controlloop.runtime.supervision.comm.ParticipantControlLoopUpdatePublisher; +import org.onap.policy.clamp.controlloop.runtime.supervision.comm.ParticipantStateChangePublisher; +import org.onap.policy.clamp.controlloop.runtime.supervision.comm.ParticipantStatusListener; +import org.onap.policy.common.endpoints.event.comm.TopicSink; +import org.onap.policy.common.endpoints.listeners.MessageTypeDispatcher; +import org.onap.policy.common.utils.services.Registry; +import org.onap.policy.common.utils.services.ServiceManager; +import org.onap.policy.common.utils.services.ServiceManagerException; +import org.onap.policy.models.base.PfModelException; +import org.onap.policy.models.base.PfModelRuntimeException; +import org.onap.policy.models.tosca.authorative.concepts.ToscaConceptIdentifier; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * This class handles supervision of control loop instances, so only one object of this type should be built at a time. + * + * <p/> It is effectively a singleton that is started at system start. + */ +public class SupervisionHandler extends ControlLoopHandler { + private static final Logger LOGGER = LoggerFactory.getLogger(SupervisionHandler.class); + + private static final String CONTROL_LOOP_CANNOT_TRANSITION_FROM_STATE = "Control loop can't transition from state "; + private static final String CONTROL_LOOP_IS_ALREADY_IN_STATE = "Control loop is already in state "; + private static final String TO_STATE = " to state "; + private static final String AND_TRANSITIONING_TO_STATE = " and transitioning to state "; + + private ControlLoopProvider controlLoopProvider; + private ParticipantProvider participantProvider; + private CommissioningProvider commissioningProvider; + private MonitoringProvider monitoringProvider; + + // Publishers for participant communication + private ParticipantStateChangePublisher stateChangePublisher; + private ParticipantControlLoopUpdatePublisher controlLoopUpdatePublisher; + private ParticipantControlLoopStateChangePublisher controlLoopStateChangePublisher; + + // Database scanner + private SupervisionScanner scanner; + + /** + * Used to manage the services. + */ + private ServiceManager manager; + private ServiceManager publisherManager; + + /** + * Gets the SupervisionHandler. + * + * @return SupervisionHandler + */ + public static SupervisionHandler getInstance() { + return Registry.get(SupervisionHandler.class.getName()); + } + + /** + * Create a handler. + * + * @param clRuntimeParameterGroup the parameters for the control loop runtime + */ + public SupervisionHandler(ClRuntimeParameterGroup clRuntimeParameterGroup) { + super(clRuntimeParameterGroup.getDatabaseProviderParameters()); + // @formatter:off + this.manager = new ServiceManager() + .addAction("ControlLoop Provider", + () -> controlLoopProvider = new ControlLoopProvider(getDatabaseProviderParameters()), + () -> controlLoopProvider = null) + .addAction("Participant Provider", + () -> participantProvider = new ParticipantProvider(getDatabaseProviderParameters()), + () -> participantProvider = null); + // @formatter:on + } + + /** + * Supervision trigger called when a command is issued on control loops. + * + * </p> Causes supervision to start or continue supervision on the control loops in question. + * + * @param controlLoopIdentifierList the control loops for which the supervision command has been issued + * @throws ControlLoopException on supervision triggering exceptions + */ + public void triggerControlLoopSupervision(List<ToscaConceptIdentifier> controlLoopIdentifierList) + throws ControlLoopException { + + LOGGER.debug("triggering control loop supervision on control loops {}", controlLoopIdentifierList); + + if (CollectionUtils.isEmpty(controlLoopIdentifierList)) { + // This is just to force throwing of the exception in certain circumstances. + exceptionOccured(Response.Status.NOT_ACCEPTABLE, + "The list of control loops for supervision is empty"); + } + + for (ToscaConceptIdentifier controlLoopId : controlLoopIdentifierList) { + try { + ControlLoop controlLoop = controlLoopProvider.getControlLoop(controlLoopId); + + superviseControlLoop(controlLoop); + + controlLoopProvider.updateControlLoop(controlLoop); + } catch (PfModelException pfme) { + throw new ControlLoopException(pfme.getErrorResponse().getResponseCode(), pfme.getMessage(), pfme); + } + } + } + + @Override + public void startAndRegisterListeners(MessageTypeDispatcher msgDispatcher) { + msgDispatcher.register(ParticipantMessageType.PARTICIPANT_STATUS.name(), new ParticipantStatusListener()); + } + + @Override + public void startAndRegisterPublishers(List<TopicSink> topicSinks) { + // TODO: Use a parameter for the timeout + // @formatter:off + this.publisherManager = new ServiceManager() + .addAction("Supervision scanner", + () -> scanner = new SupervisionScanner(controlLoopProvider, 10000), + () -> scanner = null) + .addAction("ControlLoopUpdate publisher", + () -> controlLoopUpdatePublisher = new ParticipantControlLoopUpdatePublisher(topicSinks, -1), + () -> controlLoopUpdatePublisher.terminate()) + .addAction("StateChange Publisher", + () -> stateChangePublisher = new ParticipantStateChangePublisher(topicSinks, 10000), + () -> stateChangePublisher.terminate()) + .addAction("ControlLoopStateChange Publisher", + () -> controlLoopStateChangePublisher = + new ParticipantControlLoopStateChangePublisher(topicSinks, -1), + () -> controlLoopStateChangePublisher.terminate()); + // @formatter:on + try { + publisherManager.start(); + } catch (final ServiceManagerException exp) { + throw new ControlLoopRuntimeException(Status.INTERNAL_SERVER_ERROR, + "Supervision handler start of publishers or scanner failed", exp); + } + } + + @Override + public void stopAndUnregisterPublishers() { + try { + publisherManager.stop(); + } catch (final ServiceManagerException exp) { + throw new ControlLoopRuntimeException(Status.INTERNAL_SERVER_ERROR, + "Supervision handler stop of publishers or scanner failed", exp); + } + } + + @Override + public void stopAndUnregisterListeners(MessageTypeDispatcher msgDispatcher) { + msgDispatcher.unregister(ParticipantMessageType.PARTICIPANT_STATUS.name()); + } + + /** + * Handle a ParticipantStatus message from a participant. + * + * @param participantStatusMessage the ParticipantStatus message received from a participant + */ + public void handleParticipantStatusMessage(ParticipantStatus participantStatusMessage) { + LOGGER.debug("Participant Status received {}", participantStatusMessage); + + try { + superviseParticipant(participantStatusMessage); + } catch (PfModelException | ControlLoopException svExc) { + LOGGER.warn("error supervising participant {}", participantStatusMessage.getParticipantId(), svExc); + return; + } + + try { + superviseControlLoops(participantStatusMessage); + } catch (PfModelException | ControlLoopException svExc) { + LOGGER.warn("error supervising participant {}", participantStatusMessage.getParticipantId(), svExc); + } + } + + /** + * Supervise a control loop, performing whatever actions need to be performed on the control loop. + * + * @param controlLoop the control loop to supervises + * @throws ControlLoopException on supervision errors + */ + private void superviseControlLoop(ControlLoop controlLoop) throws ControlLoopException, PfModelException { + switch (controlLoop.getOrderedState()) { + case UNINITIALISED: + superviseControlLoopUninitialization(controlLoop); + break; + + case PASSIVE: + superviseControlLoopPassivation(controlLoop); + break; + + case RUNNING: + superviseControlLoopActivation(controlLoop); + break; + + default: + exceptionOccured(Response.Status.NOT_ACCEPTABLE, + "A control loop cannot be commanded to go into state " + controlLoop.getOrderedState().name()); + } + } + + /** + * Supervise a control loop uninitialisation, performing whatever actions need to be performed on the control loop, + * control loop ordered state is UNINITIALIZED. + * + * @param controlLoop the control loop to supervises + * @throws ControlLoopException on supervision errors + */ + private void superviseControlLoopUninitialization(ControlLoop controlLoop) throws ControlLoopException { + switch (controlLoop.getState()) { + case UNINITIALISED: + exceptionOccured(Response.Status.NOT_ACCEPTABLE, + CONTROL_LOOP_IS_ALREADY_IN_STATE + controlLoop.getState().name()); + break; + + case UNINITIALISED2PASSIVE: + case PASSIVE: + controlLoop.setState(ControlLoopState.PASSIVE2UNINITIALISED); + sendControlLoopStateChange(controlLoop); + break; + + case PASSIVE2UNINITIALISED: + exceptionOccured(Response.Status.NOT_ACCEPTABLE, CONTROL_LOOP_IS_ALREADY_IN_STATE + + controlLoop.getState().name() + AND_TRANSITIONING_TO_STATE + controlLoop.getOrderedState()); + break; + + default: + exceptionOccured(Response.Status.NOT_ACCEPTABLE, CONTROL_LOOP_CANNOT_TRANSITION_FROM_STATE + + controlLoop.getState().name() + TO_STATE + controlLoop.getOrderedState()); + break; + } + } + + private void superviseControlLoopPassivation(ControlLoop controlLoop) + throws ControlLoopException, PfModelException { + switch (controlLoop.getState()) { + case PASSIVE: + exceptionOccured(Response.Status.NOT_ACCEPTABLE, + CONTROL_LOOP_IS_ALREADY_IN_STATE + controlLoop.getState().name()); + break; + case UNINITIALISED: + controlLoop.setState(ControlLoopState.UNINITIALISED2PASSIVE); + sendControlLoopUpdate(controlLoop); + break; + + case UNINITIALISED2PASSIVE: + case RUNNING2PASSIVE: + exceptionOccured(Response.Status.NOT_ACCEPTABLE, CONTROL_LOOP_IS_ALREADY_IN_STATE + + controlLoop.getState().name() + AND_TRANSITIONING_TO_STATE + controlLoop.getOrderedState()); + break; + + case RUNNING: + controlLoop.setState(ControlLoopState.RUNNING2PASSIVE); + sendControlLoopStateChange(controlLoop); + break; + + default: + exceptionOccured(Response.Status.NOT_ACCEPTABLE, CONTROL_LOOP_CANNOT_TRANSITION_FROM_STATE + + controlLoop.getState().name() + TO_STATE + controlLoop.getOrderedState()); + break; + } + } + + private void superviseControlLoopActivation(ControlLoop controlLoop) throws ControlLoopException { + switch (controlLoop.getState()) { + case RUNNING: + exceptionOccured(Response.Status.NOT_ACCEPTABLE, + CONTROL_LOOP_IS_ALREADY_IN_STATE + controlLoop.getState().name()); + break; + + case PASSIVE2RUNNING: + exceptionOccured(Response.Status.NOT_ACCEPTABLE, CONTROL_LOOP_IS_ALREADY_IN_STATE + + controlLoop.getState().name() + AND_TRANSITIONING_TO_STATE + controlLoop.getOrderedState()); + break; + + case PASSIVE: + controlLoop.setState(ControlLoopState.PASSIVE2RUNNING); + sendControlLoopStateChange(controlLoop); + break; + + default: + exceptionOccured(Response.Status.NOT_ACCEPTABLE, CONTROL_LOOP_CANNOT_TRANSITION_FROM_STATE + + controlLoop.getState().name() + TO_STATE + controlLoop.getOrderedState()); + break; + } + } + + private void sendControlLoopUpdate(ControlLoop controlLoop) throws PfModelException { + ParticipantControlLoopUpdate pclu = new ParticipantControlLoopUpdate(); + pclu.setControlLoopId(controlLoop.getKey().asIdentifier()); + pclu.setControlLoop(controlLoop); + // TODO: We should look up the correct TOSCA node template here for the control loop + // Tiny hack implemented to return the tosca service template entry from the database and be passed onto dmaap + commissioningProvider = CommissioningHandler.getInstance().getProvider(); + pclu.setControlLoopDefinition(commissioningProvider.getToscaServiceTemplate(null, null)); + controlLoopUpdatePublisher.send(pclu); + } + + private void sendControlLoopStateChange(ControlLoop controlLoop) { + ParticipantControlLoopStateChange clsc = new ParticipantControlLoopStateChange(); + clsc.setControlLoopId(controlLoop.getKey().asIdentifier()); + clsc.setMessageId(UUID.randomUUID()); + clsc.setOrderedState(controlLoop.getOrderedState()); + + controlLoopStateChangePublisher.send(clsc); + } + + private void superviseParticipant(ParticipantStatus participantStatusMessage) + throws PfModelException, ControlLoopException { + if (participantStatusMessage.getParticipantId() == null) { + exceptionOccured(Response.Status.NOT_FOUND, + "Participant ID on PARTICIPANT_STATUS message is null"); + } + + List<Participant> participantList = + participantProvider.getParticipants(participantStatusMessage.getParticipantId().getName(), + participantStatusMessage.getParticipantId().getVersion()); + + if (CollectionUtils.isEmpty(participantList)) { + Participant participant = new Participant(); + participant.setName(participantStatusMessage.getParticipantId().getName()); + participant.setVersion(participantStatusMessage.getParticipantId().getVersion()); + participant.setDefinition(new ToscaConceptIdentifier("unknown", "0.0.0")); + participant.setParticipantState(participantStatusMessage.getState()); + participant.setHealthStatus(participantStatusMessage.getHealthStatus()); + + participantList.add(participant); + participantProvider.createParticipants(participantList); + } else { + for (Participant participant : participantList) { + participant.setParticipantState(participantStatusMessage.getState()); + participant.setHealthStatus(participantStatusMessage.getHealthStatus()); + } + participantProvider.updateParticipants(participantList); + } + + monitoringProvider = MonitoringHandler.getInstance().getMonitoringProvider(); + monitoringProvider.createParticipantStatistics( + List.of(participantStatusMessage.getParticipantStatistics())); + } + + private void superviseControlLoops(ParticipantStatus participantStatusMessage) + throws PfModelException, ControlLoopException { + if (CollectionUtils.isEmpty(participantStatusMessage.getControlLoops().getControlLoopList())) { + return; + } + + for (ControlLoop controlLoop : participantStatusMessage.getControlLoops().getControlLoopList()) { + if (controlLoop == null) { + exceptionOccured(Response.Status.NOT_FOUND, + "PARTICIPANT_STATUS message references unknown control loop: " + controlLoop); + } + + ControlLoop dbControlLoop = controlLoopProvider + .getControlLoop(new ToscaConceptIdentifier(controlLoop.getName(), controlLoop.getVersion())); + if (dbControlLoop == null) { + exceptionOccured(Response.Status.NOT_FOUND, + "PARTICIPANT_STATUS control loop not found in database: " + controlLoop); + } + + for (ControlLoopElement element : controlLoop.getElements().values()) { + ControlLoopElement dbElement = dbControlLoop.getElements().get(element.getId()); + + if (dbElement == null) { + exceptionOccured(Response.Status.NOT_FOUND, + "PARTICIPANT_STATUS message references unknown control loop element: " + element); + } + + // Replace element entry in the database + dbControlLoop.getElements().put(element.getId(), element); + } + controlLoopProvider.updateControlLoop(dbControlLoop); + } + + monitoringProvider = MonitoringHandler.getInstance().getMonitoringProvider(); + for (ControlLoop controlLoop : participantStatusMessage.getControlLoops().getControlLoopList()) { + monitoringProvider.createClElementStatistics(controlLoop.getControlLoopElementStatisticsList(controlLoop)); + } + } + + @Override + public void startProviders() { + try { + manager.start(); + } catch (final ServiceManagerException exp) { + throw new ControlLoopRuntimeException(Status.INTERNAL_SERVER_ERROR, + "Supervision handler start of providers failed", exp); + } + } + + @Override + public void stopProviders() { + try { + manager.stop(); + } catch (final ServiceManagerException exp) { + throw new ControlLoopRuntimeException(Status.INTERNAL_SERVER_ERROR, + "Supervision handler stop of providers failed", exp); + } + } + + private void exceptionOccured(Response.Status status, String reason) throws ControlLoopException { + throw new ControlLoopException(status, reason); + } +} |