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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.datacollector.service;
import static java.util.Objects.nonNull;
import static org.onap.rapp.datacollector.service.PMService.CELL_FIELD_NAME;
import static org.onap.rapp.datacollector.service.PMService.VALUE_NAME;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.onap.rapp.datacollector.entity.fileready.FileReadyEvent;
import org.onap.rapp.datacollector.entity.fileready.MeasDataCollection;
import org.onap.rapp.datacollector.entity.fileready.MeasDataCollection.MeasInfo;
import org.onap.rapp.datacollector.entity.fileready.MeasDataCollection.MeasInfo.MeasValue;
import org.onap.rapp.datacollector.entity.ves.AdditionalMeasurements;
import org.onap.rapp.datacollector.entity.ves.CommonEventHeader;
import org.onap.rapp.datacollector.entity.ves.Event;
import org.onap.rapp.datacollector.entity.ves.MeasurementFields;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;
@Service
public class FileReadyParserImpl extends ParserAbstractClass implements VesParser {
private static final Logger logger = LoggerFactory.getLogger(FileReadyParserImpl.class);
public static final String MAP_ENTITY_DELIMITER = ",";
public static final String MAP_VALUES_DELIMITER = ":";
/**
* Parse incoming Json string into list of Events
*
* @param eventString json from PM Mapper
* @return list of events
*/
@Override
public List<Event> parse(final String eventString) {
logger.debug("parsing ves event {}", eventString);
FileReadyEvent fileReadyEvent = gson.fromJson(eventString, FileReadyEvent.class);
return convertFileReadyEventToEventList(fileReadyEvent, eventString);
}
/**
* Convert FileReadyEvent event into list of events which will be stored in database
*
* @param fileReadyEvent object created from PM Mapper response
* @param eventString Json event in string
* @return list of events
*/
private List<Event> convertFileReadyEventToEventList(FileReadyEvent fileReadyEvent, String eventString) {
List<Event> events = new ArrayList<>();
long averageMeasInterval = getAverageMeasInterval(fileReadyEvent);
fileReadyEvent.getMeasDataCollection().getMeasInfoList()
.forEach(measInfo -> measInfo.getMeasValuesList().stream()
.filter(measValue -> hasListOfTypesSameSizeAsListOfResults(measInfo, measValue))
.forEach(measValue -> events.add(createEvent(fileReadyEvent, measInfo, measValue, eventString, averageMeasInterval))));
return events;
}
/**
* Creates individual event from FileReadyEvent data
*
* @param fileReadyEvent bject created from PM Mapper response
* @param measInfo measurement Info object
* @param measValue measurement Value object
* @param eventString Json event in string
* @param averageMeasInterval calculated average interval
* @return Event object
*/
private Event createEvent(FileReadyEvent fileReadyEvent, MeasInfo measInfo, MeasValue measValue, String eventString, long averageMeasInterval) {
List<AdditionalMeasurements> additionalMeasList = new ArrayList<>();
// Adding measurement's results to additionalMeasList
measValue.getMeasResults()
.forEach(measResult -> {
Map<String, String> hashMap = createAdditionalMeasurementHashMap(measResult.getSValue());
additionalMeasList.add(AdditionalMeasurements.builder()
.withName(measInfo.getMeasTypes().getSMeasTypesList().get(measResult.getP() - 1))
.withHashMap(hashMap).build());
}
);
// Adding cell identifier record to additionalMeasList
additionalMeasList.add(AdditionalMeasurements.builder()
.withName(CELL_FIELD_NAME)
.withHashMap(Collections.singletonMap(CELL_FIELD_NAME, measValue.getMeasObjInstId())).build());
MeasurementFields measurementFields = MeasurementFields.builder()
.measurementInterval(averageMeasInterval)
.additionalMeasurements(additionalMeasList)
.build();
Event createdEvent = Event.of(createEventHeader(fileReadyEvent, averageMeasInterval), measurementFields);
createdEvent.raw = eventString;
return createdEvent;
}
private Map<String, String> createAdditionalMeasurementHashMap(String value) {
if (!value.contains(MAP_ENTITY_DELIMITER)) {
return Collections.singletonMap(VALUE_NAME, value);
} else {
return Stream.of(value.split(MAP_ENTITY_DELIMITER))
.map(m -> m.split(MAP_VALUES_DELIMITER))
.collect(Collectors.toMap(v -> v[0], v -> v.length > 1 ? v[1] : ""));
}
}
/**
* Creates CommonEventHeader as new copy of initial CommonEventHeader and sets its start/end date by average interval
*
* @param fileReadyEvent object created from PM Mapper response
* @param averageMeasInterval calculated average interval
* @return created CommonEventHeader
*/
private CommonEventHeader createEventHeader(FileReadyEvent fileReadyEvent, long averageMeasInterval) {
CommonEventHeader headerCopy = gson.fromJson(gson.toJson(fileReadyEvent.getCommonEventHeader()), CommonEventHeader.class);
headerCopy.setStartEpochMicrosec(headerCopy.getStartEpochMicrosec() - averageMeasInterval);
headerCopy.setLastEpochMicrosec(fileReadyEvent.getCommonEventHeader().getStartEpochMicrosec());
fileReadyEvent.getCommonEventHeader().setStartEpochMicrosec(headerCopy.getLastEpochMicrosec() + averageMeasInterval);
return headerCopy;
}
/**
* As MeansType will be selected by its position in the list we need to make sure that MeasTypesList's size is the same size of MeasResults
*
* @param measInfo measurement Info object
* @param measValue measurement Value object
* @return true=size is the same, false=size is different we can not process it
*/
private boolean hasListOfTypesSameSizeAsListOfResults(MeasInfo measInfo, MeasValue measValue) {
return measInfo.getMeasTypes().getSMeasTypesList().size() == measValue.getMeasResults().size();
}
/**
* Average interval between last and start day, divided by number of measurements
*
* @param fileReadyEvent object created from PM Mapper response
* @return Average interval in microseconds
*/
private long getAverageMeasInterval(FileReadyEvent fileReadyEvent) {
int noOfMeasurment = fileReadyEvent.getMeasDataCollection().getMeasInfoList().size();
int dividedBy = (noOfMeasurment == 0 || noOfMeasurment == 1) ? 1 : (noOfMeasurment - 1);
long difference = fileReadyEvent.getCommonEventHeader().getLastEpochMicrosec() - fileReadyEvent.getCommonEventHeader().getStartEpochMicrosec();
return difference / dividedBy;
}
/**
* Class which deserialize json event into FileReadyEvent object
*/
private static class FileReadyEventDeserializer implements JsonDeserializer<FileReadyEvent> {
@Override
public FileReadyEvent deserialize(JsonElement jsonElement, Type type, JsonDeserializationContext jsonDeserializationContext)
throws JsonParseException {
Optional<JsonObject> eventJsonObject = getEventJsonObject(jsonElement);
CommonEventHeader header = getHeaderJsonObject(eventJsonObject.orElse(null), jsonDeserializationContext);
header.setStartEpochMicrosec(header.getStartEpochMicrosec() * 1000);
header.setLastEpochMicrosec(header.getLastEpochMicrosec() * 1000);
Optional<JsonObject> measDataCollectionJson = getMeasDataCollectionJson(eventJsonObject.orElse(null));
if (measDataCollectionJson.isPresent()) {
MeasDataCollection measDataCollection = jsonDeserializationContext.deserialize(measDataCollectionJson.get(), MeasDataCollection.class);
logger.trace("measDataCollection {}", measDataCollection);
return FileReadyEvent.builder().commonEventHeader(header).measDataCollection(measDataCollection).build();
} else {
logger.error("MeasDataCollection was not found {}", eventJsonObject);
throw new JsonParseException("MeasDataCollection was not found");
}
}
private Optional<JsonObject> getMeasDataCollectionJson(JsonObject obj) {
if (nonNull(obj)) {
Optional<JsonObject> fileReadyJson = Optional.ofNullable(obj.getAsJsonObject(FILE_READY_EVENT_UNIQUE_ELEMENT));
if (fileReadyJson.isPresent()) {
return Optional.ofNullable(fileReadyJson.get().getAsJsonObject("measDataCollection"));
}
}
return Optional.empty();
}
}
private final Gson gson = new GsonBuilder()
.registerTypeAdapter(FileReadyEvent.class, new FileReadyEventDeserializer()).create();
}
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