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/*
* ================================================================================
* Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*
*/
package org.onap.dcae.analytics.tca.core.util.function.calculation;
import java.util.Comparator;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.onap.dcae.analytics.model.TcaModelConstants;
import org.onap.dcae.analytics.model.cef.EventListener;
import org.onap.dcae.analytics.tca.core.exception.TcaProcessingException;
import org.onap.dcae.analytics.tca.core.service.TcaAbatementContext;
import org.onap.dcae.analytics.tca.core.service.TcaAbatementEntity;
import org.onap.dcae.analytics.tca.core.service.TcaAbatementRepository;
import org.onap.dcae.analytics.tca.core.service.TcaExecutionContext;
import org.onap.dcae.analytics.tca.core.service.TcaProcessingContext;
import org.onap.dcae.analytics.tca.core.service.TcaResultContext;
import org.onap.dcae.analytics.tca.model.policy.ClosedLoopEventStatus;
import org.onap.dcae.analytics.tca.model.policy.MetricsPerEventName;
import org.onap.dcae.analytics.tca.model.policy.Threshold;
import org.onap.dcae.utils.eelf.logger.api.log.EELFLogFactory;
import org.onap.dcae.utils.eelf.logger.api.log.EELFLogger;
import org.onap.dcae.utils.eelf.logger.model.info.RequestIdLogInfoImpl;
import org.onap.dcae.utils.eelf.logger.model.spec.DebugLogSpecImpl;
/**
* @author Rajiv Singla
*/
public class TcaAbatementCalculator implements TcaCalculationFunction {
private static final EELFLogger logger = EELFLogFactory.getLogger(TcaAbatementCalculator.class);
@Override
public TcaExecutionContext calculate(final TcaExecutionContext tcaExecutionContext) {
final TcaAbatementContext abatementContext = tcaExecutionContext.getTcaAbatementContext();
final TcaAbatementRepository abatementPersistenceContext = abatementContext
.getTcaAbatementRepository();
final TcaResultContext resultContext = tcaExecutionContext.getTcaResultContext();
final TcaProcessingContext processingContext = tcaExecutionContext.getTcaProcessingContext();
// Skip Abatement processing - if it is not enabled
if (!abatementContext.isAbatementEnabled() ||
// Skip if no threshold violations are present
!resultContext.isThresholdViolationsPresent()) {
return tcaExecutionContext;
}
final EventListener eventListener = processingContext.getEventListener();
final MetricsPerEventName violatedMetricsPerEventName = resultContext.getViolatedMetricsPerEventName();
final Threshold violatedThreshold = violatedMetricsPerEventName.getThresholds().get(0);
final ClosedLoopEventStatus closedLoopEventStatus = violatedThreshold.getClosedLoopEventStatus();
final String requestId = tcaExecutionContext.getRequestId();
final String lookupKey = createLookupKey(eventListener, violatedMetricsPerEventName);
final RequestIdLogInfoImpl requestIdLogInfo = new RequestIdLogInfoImpl(requestId);
final DebugLogSpecImpl debugLogSpec = new DebugLogSpecImpl(requestIdLogInfo);
switch (closedLoopEventStatus) {
// ONSET - save alert info in database so that next abated event can fetch its request id for abated
// alert
case ONSET:
final TcaAbatementEntity tcaAbatementEntity =
abatementContext.create(lookupKey, requestId, false);
logger.debugLog().debug("Request Id: {}. Alert ClosedLoop Status is ONSET. " +
"Saving abatement Entity to repository with lookupKey: {}",
debugLogSpec, requestId, tcaAbatementEntity.getLookupKey());
abatementPersistenceContext.save(tcaAbatementEntity);
return tcaExecutionContext;
// ABATED - look up previous saved request id from db
case ABATED:
final List<TcaAbatementEntity> previousTcaAbatementEntities =
abatementPersistenceContext.findByLookupKey(lookupKey);
// if previous abatement are indeed present - sort them my last modified date and get latest entity
if (previousTcaAbatementEntities != null && !previousTcaAbatementEntities.isEmpty()) {
previousTcaAbatementEntities.sort(
Comparator.comparing(TcaAbatementEntity::getLastModificationDate));
final TcaAbatementEntity previousTcaAbatementEntity =
previousTcaAbatementEntities.get(previousTcaAbatementEntities.size() - 1);
logger.debugLog().debug("Request Id: {}. Found previous Abatement Entity with lookupKey: {}",
debugLogSpec, requestId, previousTcaAbatementEntity.getLookupKey());
// previous abatement entity was found - but it was already sent before - so ignore alert creation
if (previousTcaAbatementEntity.isAbatementAlertSent()) {
final String terminatingMessage = "Abatement alert was already sent before on: " +
previousTcaAbatementEntity.getLastModificationDate();
setTerminatingMessage(terminatingMessage, tcaExecutionContext, false);
return tcaExecutionContext;
}
// no previous abatement was sent
final String previousRequestId = previousTcaAbatementEntity.getRequestId();
// set abated alert request id to previous ONSET alert request id
logger.debugLog().debug("Request Id: {}. No previous abated alert was sent. Setting previous request id: {}",
debugLogSpec, requestId, previousRequestId);
resultContext.setPreviousRequestId(previousRequestId);
// save new entity with alert as sent
final TcaAbatementEntity newTcaAbatementEntity =
abatementContext.create(lookupKey, previousRequestId, true);
logger.debugLog().debug("Request Id: {}. Saving new entity with alert as sent with lookupKey: {}",
debugLogSpec, requestId, newTcaAbatementEntity.getLookupKey());
abatementPersistenceContext.save(newTcaAbatementEntity);
return tcaExecutionContext;
} else {
// no previous onset event found
final String terminatingMessage =
"Ignored orphan Abated Message. No previous ONSET event found for lookup key: " + lookupKey;
setTerminatingMessage(terminatingMessage, tcaExecutionContext, false);
return tcaExecutionContext;
}
// Only ONSET and ABATED closed loop status are supported
default:
final String errorMessage = String.format(
"Request Id: %s. Unexpected ClosedLoopEventStatus: %s - Only ONSET and ABATED are supported.",
requestId, closedLoopEventStatus);
throw new TcaProcessingException(errorMessage, new IllegalStateException(errorMessage));
}
}
private static String createLookupKey(final EventListener eventListener,
final MetricsPerEventName violatedMetricsPerEventName) {
// no null check required as all are required fields
final String eventName = violatedMetricsPerEventName.getEventName();
final String sourceName = eventListener.getEvent().getCommonEventHeader().getSourceName();
final String reportingEntityName = eventListener.getEvent().getCommonEventHeader().getReportingEntityName();
// violated threshold will always be present
final Threshold violatedThreshold = violatedMetricsPerEventName.getThresholds().get(0);
final String closedLoopControlName = violatedThreshold.getClosedLoopControlName();
final String fieldPath = violatedThreshold.getFieldPath();
return Stream.of(eventName, sourceName, reportingEntityName, closedLoopControlName, fieldPath)
.collect(Collectors.joining(TcaModelConstants.TCA_ROW_KEY_DELIMITER));
}
}
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