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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.tca.processor;
import com.google.common.base.Optional;
import com.google.common.collect.Table;
import org.openecomp.dcae.apod.analytics.common.exception.MessageProcessingException;
import org.openecomp.dcae.apod.analytics.model.domain.cef.Domain;
import org.openecomp.dcae.apod.analytics.model.domain.cef.EventListener;
import org.openecomp.dcae.apod.analytics.model.domain.policy.tca.MetricsPerEventName;
import org.openecomp.dcae.apod.analytics.model.domain.policy.tca.TCAPolicy;
import org.openecomp.dcae.apod.analytics.model.domain.policy.tca.Threshold;
import org.openecomp.dcae.apod.analytics.tca.utils.TCAUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.annotation.Nonnull;
/**
*<p>
* TCA CEF Policy Threshold processor
* <br>
* Pre Conditions: Domain and Functional Role must be present in CEF Event Listener Object
*</p>
*
* @author Rajiv Singla . Creation Date: 11/9/2016.
*/
public class TCACEFPolicyThresholdsProcessor extends AbstractTCAECEFPolicyProcessor {
private static final long serialVersionUID = 1L;
private static final Logger LOG = LoggerFactory.getLogger(TCACEFPolicyThresholdsProcessor.class);
@Override
public TCACEFProcessorContext preProcessor(@Nonnull TCACEFProcessorContext processorContext) {
// validates Domain and Functional Role are present
final EventListener eventListener = processorContext.getCEFEventListener();
final Domain domain = eventListener.getEvent().getCommonEventHeader().getDomain();
final String eventName = eventListener.getEvent().getCommonEventHeader().getEventName();
if (domain == null || eventName == null) {
final String errorMessage = "CEF Event Listener domain or eventName not Present. " +
"Invalid use of this Processor";
throw new MessageProcessingException(errorMessage, LOG, new IllegalArgumentException(errorMessage));
}
return super.preProcessor(processorContext);
}
@Override
public String getProcessorDescription() {
return "Applies TCA Policy rules to incoming CEF message. If any thresholds are violated attaches max " +
"Severity violated threshold to TCA Processor Context";
}
@Override
public TCACEFProcessorContext processMessage(TCACEFProcessorContext processorContext) {
final String cefMessage = processorContext.getMessage();
// Determine domain and eventName
final EventListener eventListener = processorContext.getCEFEventListener();
final String eventName = eventListener.getEvent().getCommonEventHeader().getEventName();
// Get Table containing event Name and Thresholds Field Path
final TCAPolicy tcaPolicy = processorContext.getTCAPolicy();
final Table<String, String, List<Threshold>> eventNameFieldPathsTable =
TCAUtils.getPolicyEventNameThresholdsTableSupplier(tcaPolicy).get();
// Get Policy Field Paths for that event Name
final Map<String, List<Threshold>> policyFieldPathsMap = eventNameFieldPathsTable.row(eventName);
final Set<String> policyFieldPaths = policyFieldPathsMap.keySet();
// Get Json Values for Policy Fields
final Map<String, List<Long>> messageFieldValuesMap = TCAUtils.getJsonPathValue(cefMessage, policyFieldPaths);
// Determine all violated thresholds per message field Path
final Map<String, Threshold> violatedThresholdsMap = new HashMap<>();
for (Map.Entry<String, List<Long>> messageFieldValuesMapEntry : messageFieldValuesMap.entrySet()) {
final String messageFieldPath = messageFieldValuesMapEntry.getKey();
final List<Threshold> messageFieldAssociatedPolicyThresholds = policyFieldPathsMap.get(messageFieldPath);
if (messageFieldAssociatedPolicyThresholds != null) {
final Optional<Threshold> thresholdOptional = TCAUtils.thresholdCalculator(
messageFieldValuesMapEntry.getValue(), messageFieldAssociatedPolicyThresholds);
if (thresholdOptional.isPresent()) {
violatedThresholdsMap.put(messageFieldPath, thresholdOptional.get());
}
}
}
// No threshold were violated
if (violatedThresholdsMap.isEmpty()) {
final String terminationMessage = "No Policy Threshold violated by the VES CEF Message.";
setTerminatingProcessingMessage(terminationMessage, processorContext);
} else {
// If there are policy violations then determine max priority violation
final Threshold maxSeverityThresholdViolation =
TCAUtils.prioritizeThresholdViolations(violatedThresholdsMap);
final MetricsPerEventName violatedMetrics = TCAUtils.createViolatedMetrics(tcaPolicy,
maxSeverityThresholdViolation, eventName);
// attach policy violation to processor Context
processorContext.setMetricsPerEventName(violatedMetrics);
final String finishMessage = String.format("Policy Threshold violation detected for threshold: %s",
maxSeverityThresholdViolation);
setFinishedProcessingMessage(finishMessage, processorContext);
}
return processorContext;
}
}
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