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/*******************************************************************************
* ============LICENSE_START=======================================================
* slice-analysis-ms
* ================================================================================
* Copyright (C) 2020-2022 Wipro Limited.
* ==============================================================================
* 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.slice.analysis.ms.service;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import javax.annotation.PostConstruct;
import org.onap.slice.analysis.ms.aai.AaiInterface;
import org.onap.slice.analysis.ms.configdb.IConfigDbService;
import org.onap.slice.analysis.ms.cps.CpsInterface;
import org.onap.slice.analysis.ms.models.Configuration;
import org.onap.slice.analysis.ms.models.MeasurementObject;
import org.onap.slice.analysis.ms.models.SubCounter;
import org.onap.slice.analysis.ms.models.policy.AdditionalProperties;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;
/**
* This class process the measurement data of an S-NSSAI
*/
@Component
@Scope("prototype")
public class SnssaiSamplesProcessor {
private static Logger log = LoggerFactory.getLogger(SnssaiSamplesProcessor.class);
@Autowired
private PolicyService policyService;
@Autowired
private IConfigDbService configDbService;
@Autowired
private PmDataQueue pmDataQueue;
@Autowired
private AverageCalculator averageCalculator;
@Autowired
private AaiInterface aaiInterface;
@Autowired
private CpsInterface cpsInterface;
private List<MeasurementObject> snssaiMeasurementList = new ArrayList<>();
private Map<String, List<String>> ricToCellMapping = new HashMap<>();
private Map<String, Map<String, Integer>> ricToPrbsMapping = new HashMap<>();
private Map<String, Map<String, Integer>> ricToThroughputMapping = new HashMap<>();
private int noOfSamples;
private List<String> pmsToCompute;
private Map<String, String> prbThroughputMapping = new HashMap<>();
private int minPercentageChange;
@PostConstruct
public void init() {
Configuration configuration = Configuration.getInstance();
noOfSamples = configuration.getSamples();
pmsToCompute = new ArrayList<>();
pmsToCompute.add("PrbUsedDl");
pmsToCompute.add("PrbUsedUl");
prbThroughputMapping = new HashMap<>();
prbThroughputMapping.put("PrbUsedDl", "dLThptPerSlice");
prbThroughputMapping.put("PrbUsedUl", "uLThptPerSlice");
minPercentageChange = configuration.getMinPercentageChange();
}
/**
* process the measurement data of an S-NSSAI
*/
public boolean processSamplesOfSnnsai(String snssai, List<String> networkFunctions) {
Boolean isConfigDbEnabled = (Objects.isNull(Configuration.getInstance().getConfigDbEnabled())) ? true
: Configuration.getInstance().getConfigDbEnabled();
List<MeasurementObject> sample = null;
List<List<MeasurementObject>> samples = null;
Map<String, String> serviceDetails = null;
log.info("Network Functions {} of snssai {}", networkFunctions, snssai);
for (String nf : networkFunctions) {
log.debug("Average of samples for {}:", snssai);
samples = pmDataQueue.getSamplesFromQueue(new SubCounter(nf, snssai), noOfSamples);
if (samples != null) {
sample = averageCalculator.findAverageOfSamples(samples);
addToMeasurementList(sample);
} else {
log.info("Not enough samples present for nf {}", nf);
return false;
}
}
log.info("snssai measurement list {}", snssaiMeasurementList);
Map<String, Map<String, Object>> ricConfiguration;
Map<String, Integer> sliceConfiguration;
if (isConfigDbEnabled) {
ricToCellMapping = configDbService.fetchRICsOfSnssai(snssai);
ricConfiguration = configDbService.fetchCurrentConfigurationOfRIC(snssai);
sliceConfiguration = configDbService.fetchCurrentConfigurationOfSlice(snssai);
serviceDetails = configDbService.fetchServiceDetails(snssai);
} else {
ricToCellMapping = cpsInterface.fetchRICsOfSnssai(snssai);
ricConfiguration = cpsInterface.fetchCurrentConfigurationOfRIC(snssai);
serviceDetails = aaiInterface.fetchServiceDetails(snssai);
sliceConfiguration = aaiInterface.fetchCurrentConfigurationOfSlice(snssai);
}
log.info("RIC to Cell Mapping for {} S-NSSAI: {}", snssai, ricToCellMapping);
log.info("RIC Configuration {} and Slice Configuration {}", ricConfiguration, sliceConfiguration);
pmsToCompute.forEach(pm -> {
log.debug("processing for pm {}", pm);
sumOfPrbsAcrossCells(pm);
int sum = computeSum(pm);
computeThroughput(sliceConfiguration, sum, pm);
calculatePercentageChange(ricConfiguration, prbThroughputMapping.get(pm));
});
updateConfiguration();
if (ricToThroughputMapping.size() > 0) {
AdditionalProperties<Map<String, List<Map<String, Integer>>>> addProps = new AdditionalProperties<>();
addProps.setResourceConfig(getChangedRIConfigFormat(ricToThroughputMapping));
policyService.sendOnsetMessageToPolicy(snssai, addProps, serviceDetails);
}
return true;
}
/**
* change the RICConfig data format to be compatible with SDN-R
*/
protected Map<String, List<Map<String, Integer>>> getChangedRIConfigFormat(
Map<String, Map<String, Integer>> ricToThroughputMapping) {
Iterator<Map.Entry<String, Map<String, Integer>>> it = ricToThroughputMapping.entrySet().iterator();
Map.Entry<String, Map<String, Integer>> entry = null;
List<Map<String, Integer>> ricConfigList = new ArrayList<>();
Map<String, List<Map<String, Integer>>> ricConfigData = new HashMap<>();
while (it.hasNext()) {
Map<String, Integer> newConfigMap = new HashMap<>();
entry = it.next();
newConfigMap = entry.getValue();
newConfigMap.put("nearRTRICId", Integer.parseInt(entry.getKey()));
ricConfigList.add(newConfigMap);
}
ricConfigData.put("data", ricConfigList);
return ricConfigData;
}
/**
* process the measurement data of an S-NSSAI
*/
protected void updateConfiguration() {
Iterator<Map.Entry<String, Map<String, Integer>>> it = ricToThroughputMapping.entrySet().iterator();
Map.Entry<String, Map<String, Integer>> entry = null;
while (it.hasNext()) {
entry = it.next();
if (entry.getValue().size() == 0) {
it.remove();
}
}
}
private void addToMeasurementList(List<MeasurementObject> sample) {
snssaiMeasurementList.addAll(sample);
}
/**
* Calculate the change in the configuration value and keep the configuration
* only if it is greater than a specific limit
*/
protected void calculatePercentageChange(Map<String, Map<String, Object>> ricConfiguration, String pm) {
Iterator<Map.Entry<String, Map<String, Integer>>> it = ricToThroughputMapping.entrySet().iterator();
Map.Entry<String, Map<String, Integer>> entry = null;
float existing = 0;
float change = 0;
while (it.hasNext()) {
entry = it.next();
existing = (float) ((int) ricConfiguration.get(entry.getKey()).get(pm));
change = ((Math.abs(entry.getValue().get(pm) - existing)) / existing) * 100;
if (change <= minPercentageChange) {
ricToThroughputMapping.get(entry.getKey()).remove(pm);
log.info("Removing pm data {} for RIC {}", pm, entry.getKey());
}
}
}
protected void sumOfPrbsAcrossCells(String pmName) {
ricToCellMapping.forEach((ric, cells) -> {
int sumOfPrbs = 0;
for (String cell : cells) {
int index = MeasurementObject.findIndex(cell, snssaiMeasurementList);
sumOfPrbs += snssaiMeasurementList.get(index).getPmData().get(pmName);
}
if (ricToPrbsMapping.containsKey(ric)) {
ricToPrbsMapping.get(ric).put(pmName, sumOfPrbs);
} else {
Map<String, Integer> pmToPrbMapping = new HashMap<>();
pmToPrbMapping.put(pmName, sumOfPrbs);
ricToPrbsMapping.put(ric, pmToPrbMapping);
}
});
log.info("PRBs sum computed for RIC {}", ricToPrbsMapping);
}
protected Integer computeSum(String pm) {
return ricToPrbsMapping.entrySet().stream().map(x -> x.getValue().get(pm)).reduce(0, Integer::sum);
}
protected void computeThroughput(Map<String, Integer> sliceConfiguration, int sum, String pm) {
Iterator<Map.Entry<String, Map<String, Integer>>> it = ricToPrbsMapping.entrySet().iterator();
Map.Entry<String, Map<String, Integer>> entry = null;
Map<String, Integer> throughtputMap = null;
String ric = "";
int value = 0;
while (it.hasNext()) {
entry = it.next();
ric = entry.getKey();
value = Math.round(((float) entry.getValue().get(pm) / sum)
* (float) sliceConfiguration.get(prbThroughputMapping.get(pm)));
if (ricToThroughputMapping.containsKey(ric)) {
ricToThroughputMapping.get(ric).put(prbThroughputMapping.get(pm), value);
} else {
throughtputMap = new HashMap<>();
throughtputMap.put(prbThroughputMapping.get(pm), value);
ricToThroughputMapping.put(ric, throughtputMap);
}
}
log.info("Throughput computed for RIC {}", ricToThroughputMapping);
}
}
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