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/*
* ==========LICENSE_START=========================================================
* Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
* Copyright (c) 2022 Wipro Limited 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.Optional;
import java.util.Set;
import java.util.List;
import java.util.stream.Collectors;
import org.onap.dcae.analytics.model.cef.CommonEventHeader;
import org.onap.dcae.analytics.model.cef.Event;
import org.onap.dcae.analytics.model.cef.EventListener;
import org.onap.dcae.analytics.tca.core.service.TcaExecutionContext;
import org.onap.dcae.analytics.tca.model.policy.MetricsPerEventName;
import org.onap.dcae.analytics.tca.model.policy.TcaPolicy;
/**
* @author Rajiv Singla
*/
public class TcaEventNameFilter implements TcaCalculationFunction {
@Override
public TcaExecutionContext calculate(final TcaExecutionContext tcaExecutionContext) {
final String cefMessage = tcaExecutionContext.getCefMessage();
final EventListener eventListener = tcaExecutionContext.getTcaProcessingContext().getEventListener();
final Optional<String> eventNameOptional = Optional.ofNullable(eventListener)
.map(EventListener::getEvent)
.map(Event::getCommonEventHeader)
.map(CommonEventHeader::getEventName);
// Check Event name is present
if (!eventNameOptional.isPresent()) {
final String errorMessage =
"Event -> Common Event Header -> Event Name not present. Invalid CEF Message: " + cefMessage;
setTerminatingMessage(errorMessage, tcaExecutionContext, true);
return tcaExecutionContext;
}
// Get CEF Message Event name and Event names in tca policy
final String cefMessageEventName = eventNameOptional.get();
final List<TcaPolicy> tcaPolList = tcaExecutionContext.getTcaPolicy();
int count = 0;
int size = tcaPolList.size();
for( TcaPolicy tcaPol : tcaPolList){
final Set<String> policyEventNames = tcaPol.getMetricsPerEventName().stream()
.map(MetricsPerEventName::getEventName).collect(Collectors.toSet());
// Check CEF Message Event name matches any Policy Event names
if (!policyEventNames.contains(cefMessageEventName)) {
count++;
if(count >= size) {
final String earlyTerminationMessage = String.format(
"CEF Message Event name does not match any Policy Event Names. " +
"Message EventName: %s, Policy Event Names: %s", cefMessageEventName, policyEventNames);
setTerminatingMessage(earlyTerminationMessage, tcaExecutionContext, false);
return tcaExecutionContext;
}
}
}
// CEF Messages one of the the Policy Event names
// do nothing
return tcaExecutionContext;
}
}
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