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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.onap.dcae.apod.analytics.tca.processor;
import com.google.common.base.Joiner;
import org.onap.dcae.apod.analytics.model.domain.cef.EventListener;
import org.onap.dcae.apod.analytics.model.domain.policy.tca.TCAPolicy;
import java.util.List;
import static org.onap.dcae.apod.analytics.tca.utils.TCAUtils.getPolicyEventNamesSupplier;
/**
* <p>
* TCA Processor that acts like a filter to filter out messages which does not belong to TCA Policy Event Name
* <br>
* Pre Conditions: CEF Event Listener must be present
* </p>
*
* @author Rajiv Singla . Creation Date: 11/9/2016.
*/
public class TCACEFPolicyEventNameFilter extends AbstractTCAECEFPolicyProcessor {
private static final long serialVersionUID = 1L;
@Override
public String getProcessorDescription() {
return "Filters out CEF Messages which does not match Policy Functional Roles";
}
@Override
public TCACEFProcessorContext processMessage(TCACEFProcessorContext processorContext) {
// Safe to get event Listener here without null check as pre processor will validate if
// event listener is indeed present
final EventListener eventListener = processorContext.getCEFEventListener();
String cefMessageEventName;
if (eventListener.getEvent() != null &&
eventListener.getEvent().getCommonEventHeader() != null &&
eventListener.getEvent().getCommonEventHeader().getEventName() != null) {
cefMessageEventName = eventListener.getEvent().getCommonEventHeader().getEventName();
} else {
String terminationMessage = "Invalid CEF Message.Common Event Header Event Name not present.";
setTerminatingProcessingMessage(terminationMessage, processorContext);
return processorContext;
}
// Determine Policy Functional Roles
final TCAPolicy tcaPolicy = processorContext.getTCAPolicy();
final List<String> policyEventNames = getPolicyEventNamesSupplier(tcaPolicy).get();
final String policyEventNamesString = Joiner.on(",").join(policyEventNames);
// If Policy event names contains CEF message event names then continue processing
if (policyEventNames.contains(cefMessageEventName)) {
final String finishMessage = String.format(
"Policy Event Name and CEF Message Event Name match successful." +
"Message EventName: %s, Policy Event Names: %s",
cefMessageEventName, policyEventNamesString);
setFinishedProcessingMessage(finishMessage, processorContext);
} else {
// If Policy event names does not contain CEF message event names then terminate processing
final String terminatingMessage = String.format(
"Policy Event name and CEF Message Event name match unsuccessful." +
"Message EventName: %s, Policy Event Names: %s",
cefMessageEventName, policyEventNamesString);
setTerminatingProcessingMessage(terminatingMessage, processorContext);
}
return processorContext;
}
}
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