1 files changed, 190 insertions, 0 deletions
diff --git a/components/slice-analysis-ms/src/main/java/org/onap/slice/analysis/ms/service/SnssaiSamplesProcessor.java b/components/slice-analysis-ms/src/main/java/org/onap/slice/analysis/ms/service/SnssaiSamplesProcessor.java
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+++ b/components/slice-analysis-ms/src/main/java/org/onap/slice/analysis/ms/service/SnssaiSamplesProcessor.java
@@ -0,0 +1,190 @@
+/*******************************************************************************
+ *  ============LICENSE_START=======================================================
+ *  slice-analysis-ms
+ *  ================================================================================
+ *   Copyright (C) 2020 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 javax.annotation.PostConstruct;
+
+import org.onap.slice.analysis.ms.configdb.IConfigDbService;
+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.onap.slice.analysis.ms.utils.BeanUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+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);
+
+	private PolicyService policyService;
+	private IConfigDbService configDbService;
+	private PmDataQueue pmDataQueue;
+	private AverageCalculator averageCalculator;
+	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 samples;
+	private List<String> pmsToCompute;	
+	private Map<String, String> prbThroughputMapping = new HashMap<>(); 
+	private int minPercentageChange;
+	
+	@PostConstruct
+	public void init() {
+		Configuration configuration = Configuration.getInstance();
+		samples = 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();
+		policyService = BeanUtil.getBean(PolicyService.class);
+		configDbService = BeanUtil.getBean(IConfigDbService.class);
+		pmDataQueue = BeanUtil.getBean(PmDataQueue.class);
+		averageCalculator = BeanUtil.getBean(AverageCalculator.class);
+	}
+
+	/**
+	 * process the measurement data of an S-NSSAI
+	 */
+	public void processSamplesOfSnnsai(String snssai, List<String> networkFunctions) {
+		networkFunctions.forEach(nf -> {
+			log.debug("Average of samples for {}:", snssai);
+			addToMeasurementList(averageCalculator.findAverageOfSamples(pmDataQueue.getSamplesFromQueue(new SubCounter(nf, snssai), samples)));
+		});		
+		ricToCellMapping = configDbService.fetchRICsOfSnssai(snssai);	
+		log.debug("RIC to Cell Mapping for {} S-NSSAI: {}", snssai, ricToCellMapping);
+		Map<String, Map<String, Integer>> ricConfiguration = configDbService.fetchCurrentConfigurationOfRIC(snssai);
+		Map<String, Integer> sliceConfiguration = configDbService.fetchCurrentConfigurationOfSlice(snssai);
+		log.debug("RIC Configuration: {}", ricConfiguration);
+		log.debug("Slice Configuration: {}", sliceConfiguration);
+		pmsToCompute.forEach(pm -> {
+			sumOfPrbsAcrossCells(pm);
+			int sum = computeSum(pm);
+			computeThroughput(sliceConfiguration, sum, pm);
+			calculatePercentageChange(ricConfiguration, pm);
+		});
+		updateConfiguration();	
+		if(ricToThroughputMapping.size() > 0) {
+			AdditionalProperties<Map<String, Map<String, Integer>>> addProps = new AdditionalProperties<>();
+			addProps.setResourceConfig(ricToThroughputMapping);
+			policyService.sendOnsetMessageToPolicy(snssai, addProps, configDbService.fetchServiceDetails(snssai));
+		}
+
+	}
+
+	/**
+	 * 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, Integer>> 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 = 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);
+			}
+		}
+	}
+	
+	protected void sumOfPrbsAcrossCells(String pmName) {
+		ricToCellMapping.forEach((ric,cells) -> {
+			int sumOfPrbs = 0;
+			for(String cell : cells) {
+				int index = snssaiMeasurementList.indexOf(new MeasurementObject(cell));
+				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);
+			}
+		});
+	}
+
+	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);
+			}
+		}
+
+	}
+
+}