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/*
* ===============================LICENSE_START======================================
* dcae-analytics
* ================================================================================
* Copyright © 2017 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.openecomp.dcae.apod.analytics.cdap.tca.flowlet;
import co.cask.cdap.api.annotation.Output;
import co.cask.cdap.api.annotation.ProcessInput;
import co.cask.cdap.api.annotation.Property;
import co.cask.cdap.api.dataset.lib.ObjectMappedTable;
import co.cask.cdap.api.flow.flowlet.AbstractFlowlet;
import co.cask.cdap.api.flow.flowlet.FlowletContext;
import co.cask.cdap.api.flow.flowlet.OutputEmitter;
import org.apache.commons.lang3.StringUtils;
import org.openecomp.dcae.apod.analytics.cdap.common.CDAPComponentsConstants;
import org.openecomp.dcae.apod.analytics.cdap.common.domain.tca.ThresholdCalculatorOutput;
import org.openecomp.dcae.apod.analytics.cdap.common.exception.CDAPSettingsException;
import org.openecomp.dcae.apod.analytics.cdap.common.persistance.tca.TCAAlertsAbatementEntity;
import org.openecomp.dcae.apod.analytics.cdap.common.persistance.tca.TCAAlertsAbatementPersister;
import org.openecomp.dcae.apod.analytics.model.domain.cef.EventListener;
import org.openecomp.dcae.apod.analytics.model.domain.policy.tca.ClosedLoopEventStatus;
import org.openecomp.dcae.apod.analytics.model.domain.policy.tca.MetricsPerEventName;
import org.openecomp.dcae.apod.analytics.model.domain.policy.tca.Threshold;
import org.openecomp.dcae.apod.analytics.model.facade.tca.TCAVESResponse;
import org.openecomp.dcae.apod.analytics.tca.utils.TCAUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.util.Date;
/**
* Flowlet responsible to sending out abatement alerts
*
* @author Rajiv Singla . Creation Date: 9/11/2017.
*/
public class TCAVESAlertsAbatementFlowlet extends AbstractFlowlet {
private static final Logger LOG = LoggerFactory.getLogger(TCAVESAlertsAbatementFlowlet.class);
@Property
private final String tcaAlertsAbatementTableName;
@Output(CDAPComponentsConstants.TCA_FIXED_VES_ALERTS_ABATEMENT_NAME_OUTPUT)
protected OutputEmitter<String> alertsAbatementOutputEmitter;
private ObjectMappedTable<TCAAlertsAbatementEntity> tcaAlertsAbatementTable;
public TCAVESAlertsAbatementFlowlet(final String tcaAlertsAbatementTableName) {
this.tcaAlertsAbatementTableName = tcaAlertsAbatementTableName;
}
@Override
public void configure() {
setName(CDAPComponentsConstants.TCA_FIXED_VES_ALERTS_ABATEMENT_NAME_FLOWLET);
setDescription(CDAPComponentsConstants.TCA_FIXED_VES_ALERTS_ABATEMENT_DESCRIPTION_FLOWLET);
}
@Override
public void initialize(FlowletContext flowletContext) throws Exception {
super.initialize(flowletContext);
tcaAlertsAbatementTable = getContext().getDataset(tcaAlertsAbatementTableName);
}
@ProcessInput(CDAPComponentsConstants.TCA_FIXED_VES_TCA_CALCULATOR_NAME_OUTPUT)
public void determineAbatementAlerts(final ThresholdCalculatorOutput thresholdCalculatorOutput) throws IOException {
final String cefMessage = thresholdCalculatorOutput.getCefMessage();
final String alertMessageString = thresholdCalculatorOutput.getAlertMessage();
final String violatedMetricsPerEventNameString = thresholdCalculatorOutput.getViolatedMetricsPerEventName();
// alerts must have violated metrics per event name present
if (StringUtils.isBlank(violatedMetricsPerEventNameString)) {
final String errorMessage = String.format(
"No violated metricsPerEventName found for VES Message: %s." +
"Ignored alert message: %s", cefMessage, alertMessageString);
throw new CDAPSettingsException(errorMessage, LOG, new IllegalStateException(errorMessage));
}
final MetricsPerEventName violatedMetricsPerEventName =
TCAUtils.readValue(violatedMetricsPerEventNameString, MetricsPerEventName.class);
final EventListener eventListener = TCAUtils.readValue(cefMessage, EventListener.class);
final TCAVESResponse tcavesResponse = TCAUtils.readValue(alertMessageString, TCAVESResponse.class);
final Threshold violatedThreshold = violatedMetricsPerEventName.getThresholds().get(0);
final ClosedLoopEventStatus closedLoopEventStatus = violatedThreshold.getClosedLoopEventStatus();
switch (closedLoopEventStatus) {
case ONSET:
LOG.debug("Saving information for ONSET event for cefMessage: {}", cefMessage);
TCAAlertsAbatementPersister.persist(eventListener, violatedMetricsPerEventName, tcavesResponse,
null, tcaAlertsAbatementTable);
LOG.debug("Emitting ONSET alert: {}", alertMessageString);
alertsAbatementOutputEmitter.emit(alertMessageString);
break;
case ABATED:
LOG.debug("Looking up previous sent alert for abated threshold: {}", violatedThreshold);
final TCAAlertsAbatementEntity previousAlertsAbatementEntry =
TCAAlertsAbatementPersister.lookUpByKey(eventListener, violatedMetricsPerEventName,
tcaAlertsAbatementTable);
if (previousAlertsAbatementEntry != null) {
LOG.debug("Found previous AlertsAbatementEntity: {}", previousAlertsAbatementEntry);
final String abatementSentTS = previousAlertsAbatementEntry.getAbatementSentTS();
if (abatementSentTS != null) {
LOG.debug("Abatement alert was already sent at timestamp: {}. " +
"Skip resending this abatement alert again", abatementSentTS);
} else {
final long newAbatementSentTS = new Date().getTime();
LOG.debug(
"No abatement alert was sent before." +
"Sending abatement alert:{} for the first time at:{}",
alertMessageString, newAbatementSentTS);
// save new Abatement alert sent timestamp in table
TCAAlertsAbatementPersister.persist(eventListener, violatedMetricsPerEventName, tcavesResponse,
Long.toString(newAbatementSentTS), tcaAlertsAbatementTable);
// Set request id to be same as previous ONSET event request ID
tcavesResponse.setRequestID(previousAlertsAbatementEntry.getRequestId());
final String abatedAlertString = TCAUtils.writeValueAsString(tcavesResponse);
LOG.info("Emitting ABATED alert: {}", abatedAlertString);
alertsAbatementOutputEmitter.emit(abatedAlertString);
}
} else {
LOG.info("No previous ONSET alert was found for this ABATED alert: {}.Skip sending abated alert.",
alertMessageString);
}
break;
default:
final String errorMessage = String.format(
"Unexpected ClosedLoopEventStatus: %s. Only ONSET and ABATED are supported." +
"Ignoring alert: %s", closedLoopEventStatus, alertMessageString);
throw new CDAPSettingsException(errorMessage, LOG, new IllegalStateException(errorMessage));
}
}
}
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