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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.a1pesimulator.service.ves;
import java.text.MessageFormat;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Optional;
import org.onap.a1pesimulator.data.ves.VesEvent;
import org.onap.a1pesimulator.data.ves.MeasurementFields.AdditionalMeasurement;
import org.onap.a1pesimulator.service.common.EventCustomizer;
import org.onap.a1pesimulator.service.ue.RanUeHolder;
import org.onap.a1pesimulator.util.Constants;
import org.onap.a1pesimulator.util.JsonUtils;
import org.onap.a1pesimulator.util.RanVesUtils;
import lombok.AllArgsConstructor;
import lombok.EqualsAndHashCode;
public class RanCellFailureEventCustomizer implements EventCustomizer {
private static final String UE_PARAM_TRAFFIC_MODEL_RANGE = "[[50->10]]";
private final RanUeHolder ranUeHolder;
private final VesEvent event;
private final Map<Key, Value> additionalMeasurementsValues = new HashMap<>();
private final ValueFactory valueFactory;
public RanCellFailureEventCustomizer(VesEvent event, RanUeHolder ranUeHolder) {
this.ranUeHolder = ranUeHolder;
this.event = event;
valueFactory = new ValueFactory();
collectAdditionalMeasurementValues(event);
}
@Override
public VesEvent apply(VesEvent t) {
return customizeEvent(JsonUtils.INSTANCE.clone(this.event));
}
private void collectAdditionalMeasurementValues(VesEvent event) {
Collection<AdditionalMeasurement> additionalMeasurementsToResolve =
event.getMeasurementFields().getAdditionalMeasurements();
additionalMeasurementsToResolve.forEach(this::collectAdditionalMeasurementValue);
}
private void collectAdditionalMeasurementValue(AdditionalMeasurement m) {
for (Entry<String, String> entry : m.getHashMap().entrySet()) {
if (!RanVesUtils.isRange(entry.getValue())) {
continue;
}
additionalMeasurementsValues
.putIfAbsent(new Key(m.getName(), entry.getKey()), valueFactory.getInstance(entry.getValue()));
}
}
private VesEvent customizeEvent(VesEvent event) {
RanVesUtils.updateHeader(event);
enrichWithUeData(event);
resolveRanges(event);
return event;
}
private void resolveRanges(VesEvent event) {
List<AdditionalMeasurement> additionalMeasurementsToResolve =
event.getMeasurementFields().getAdditionalMeasurements();
additionalMeasurementsToResolve.forEach(this::resolveRanges);
event.getMeasurementFields().setAdditionalMeasurements(additionalMeasurementsToResolve);
}
private void resolveRanges(AdditionalMeasurement m) {
for (Entry<String, String> entry : m.getHashMap().entrySet()) {
Key key = new Key(m.getName(), entry.getKey());
if (!additionalMeasurementsValues.containsKey(key)) {
continue;
}
Value value = additionalMeasurementsValues.get(key);
value.current = value.calculateCurrentValue();
entry.setValue(value.current.toString());
}
}
private void enrichWithUeData(VesEvent event) {
Optional<AdditionalMeasurement> identity = event.getMeasurementFields().getAdditionalMeasurements().stream()
.filter(msrmnt -> Constants.MEASUREMENT_FIELD_IDENTIFIER
.equalsIgnoreCase(
msrmnt.getName()))
.findAny();
identity.ifPresent(m -> addTrafficModelMeasurement(event));
}
private void addTrafficModelMeasurement(VesEvent event) {
AdditionalMeasurement trafficModelMeasurement =
RanVesUtils.buildTrafficModelMeasurement(ranUeHolder, UE_PARAM_TRAFFIC_MODEL_RANGE);
event.getMeasurementFields().getAdditionalMeasurements().add(trafficModelMeasurement);
collectAdditionalMeasurementValue(trafficModelMeasurement);
}
// -----------helper classes
private static class ValueFactory {
public Value getInstance(String value) {
String[] split;
if (RanVesUtils.isRandomRange(value)) {
split = RanVesUtils.splitRandomRange(value);
return new RandomValue(Integer.valueOf(split[0]), Integer.valueOf(split[1]));
}
if (RanVesUtils.isTrandingRange(value)) {
split = RanVesUtils.splitTrendingRange(value);
Integer start = Integer.valueOf(split[0]);
Integer end = Integer.valueOf(split[1]);
if (start < end) {
return new RaisingValue(start, end);
} else if (start > end) {
return new DecreasingValue(start, end);
}
}
throw new RuntimeException(MessageFormat.format("Cannot instantiate Value from string: {0}", value));
}
}
private abstract static class Value {
protected Integer start;
protected Integer end;
protected Integer current;
public Value(Integer start, Integer end) {
this.start = start;
this.end = end;
}
public abstract Integer calculateCurrentValue();
}
private static class RaisingValue extends Value {
private int increment;
public RaisingValue(Integer start, Integer end) {
super(start, end);
}
@Override
public Integer calculateCurrentValue() {
if (current == null) {
return start;
}
if (increment == 0) {
increment = 1;
} else {
increment = increment * 2;
}
Integer result = start + increment;
if (result > end) {
increment = 1;
return end;
}
return result;
}
}
private static class DecreasingValue extends Value {
private int decrement;
public DecreasingValue(Integer start, Integer end) {
super(start, end);
}
@Override
public Integer calculateCurrentValue() {
if (current == null) {
return start;
}
if (decrement == 0) {
decrement = 1;
} else {
decrement = decrement * 2;
}
Integer result = start - decrement;
if (result < end) {
return end;
}
return result;
}
}
private static class RandomValue extends Value {
public RandomValue(Integer start, Integer end) {
super(start, end);
}
@Override
public Integer calculateCurrentValue() {
return RanVesUtils.getRandomNumber(start, end);
}
}
@AllArgsConstructor
@EqualsAndHashCode
private static class Key {
private String paramName;
private String mapKey;
}
}
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