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/*
* Copyright (C) 2021 Samsung Electronics
* 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
*/
package org.onap.rapp.sleepingcelldetector.service.scd;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;
import javax.annotation.PostConstruct;
import org.onap.rapp.sleepingcelldetector.configuration.SleepingCellDetectorConfiguration;
import org.onap.rapp.sleepingcelldetector.entity.MeasurementConfiguration;
import org.onap.rapp.sleepingcelldetector.service.JsonHelper;
import org.onap.rapp.sleepingcelldetector.service.scd.condition.Condition;
import org.onap.rapp.sleepingcelldetector.service.scd.condition.ConditionFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class SleepingCellDetectorService {
private static final Logger logger = LoggerFactory.getLogger(SleepingCellDetectorService.class);
private final JsonHelper jsonHelper;
private final SleepingCellDetectorConfiguration configuration;
protected Map<String, MeasurementConfiguration> measurementMap = new HashMap<>();
@Autowired
public SleepingCellDetectorService(JsonHelper jsonHelper, SleepingCellDetectorConfiguration configuration) {
this.jsonHelper = jsonHelper;
this.configuration = configuration;
}
@PostConstruct
public void loadConditionMap() throws Exception {
logger.info("TCA config fetching process started");
boolean tcaConfigUploadStatus = false;
while (!tcaConfigUploadStatus) {
tcaConfigUploadStatus = getTCAConfig();
TimeUnit.SECONDS.sleep(10);
}
}
private boolean getTCAConfig() {
try {
InputStream in = this.getClass().getResourceAsStream("/tca.json");
BufferedReader inr = new BufferedReader(new InputStreamReader(in));
String tcaConfig = inr.lines().collect(Collectors.joining(" "));
MeasurementConfiguration[] measurementConfigurations = jsonHelper.deserialize(tcaConfig, MeasurementConfiguration[].class);
Arrays.stream(measurementConfigurations).forEach(mf -> measurementMap.put(mf.getName(), mf));
return true;
} catch (Exception e) {
logger.error("Error during loading Measurement Configuration for TCA: {}", e.getMessage());
return false;
}
}
public Boolean isFailing(List<Map<String, Integer>> performanceData) {
Map<String, List<Integer>> measurementValuesMap = groupMeasurementValues(performanceData);
measurementValuesMap.forEach((fieldName, values) -> {
if (containsEmptyValues(values)) {
CalculationUtil.fillGaps(values);
}
});
List<Boolean> predictions = new ArrayList<>();
measurementValuesMap.forEach((fieldName, values) -> predictions.add(isFailing(values, measurementMap.get(fieldName))));
return predictions.contains(true);
}
private Map<String, List<Integer>> groupMeasurementValues(List<Map<String, Integer>> performanceData) {
Map<String, List<Integer>> measurementValuesMap = prepareMeasurementMap();
performanceData.forEach(pm -> measurementMap.forEach((fieldName, configuration) -> {
Integer measurement = pm.get(fieldName);
List<Integer> measurements = measurementValuesMap.get(fieldName);
measurements.add(measurement);
}));
return measurementValuesMap;
}
private Map<String, List<Integer>> prepareMeasurementMap() {
Map<String, List<Integer>> measurementValuesMap = new HashMap<>();
measurementMap.forEach((fieldName, values) -> measurementValuesMap.put(fieldName, new ArrayList<>()));
return measurementValuesMap;
}
private boolean containsEmptyValues(List<Integer> performanceData) {
for (Integer value : performanceData) {
if (value == null) {
return true;
}
}
return false;
}
private Boolean isFailing(List<Integer> values, MeasurementConfiguration measurementConfiguration) {
Condition condition = ConditionFactory.getCondition(measurementConfiguration.getCondition());
Integer totalAverage = CalculationUtil.calculateAverage(values);
Integer latestAverage = CalculationUtil.calculateAverage(values.stream()
.skip(configuration.getPredictionSlotNumber() - measurementConfiguration.getLatestSize())
.collect(Collectors.toList()));
return condition.compare(totalAverage, measurementConfiguration.getAverageThresholdValue())
&& condition.compare(latestAverage, measurementConfiguration.getLatestThresholdValue());
}
}
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