blob: ba203982e312654c9f86fa55dfe014e3ed4ea572 [file] [log] [blame]
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.nifi.controller.status.history;
import org.apache.nifi.web.api.dto.status.StatusDescriptorDTO;
import org.apache.nifi.web.api.dto.status.StatusHistoryDTO;
import org.apache.nifi.web.api.dto.status.StatusSnapshotDTO;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
public class StatusHistoryUtil {
public static StatusHistoryDTO createStatusHistoryDTO(final StatusHistory statusHistory) {
final List<StatusSnapshotDTO> snapshotDtos = new ArrayList<>();
final Set<MetricDescriptor<?>> metricDescriptors = new LinkedHashSet<>();
final LinkedHashMap<String, String> componentDetails = new LinkedHashMap<>(statusHistory.getComponentDetails());
final Set<String> metricNames = new HashSet<>();
for (final StatusSnapshot snapshot : statusHistory.getStatusSnapshots()) {
final StatusSnapshotDTO snapshotDto = StatusHistoryUtil.createStatusSnapshotDto(snapshot);
snapshotDtos.add(snapshotDto);
metricNames.addAll(snapshotDto.getStatusMetrics().keySet());
metricDescriptors.addAll(snapshot.getMetricDescriptors());
}
// We need to ensure that the 'aggregate snapshot' has an entry for every metric, including counters.
// So for any metric that has is not in the aggregate snapshot, add it with a value of 0
for (final StatusSnapshotDTO snapshotDto : snapshotDtos) {
final Map<String, Long> metrics = snapshotDto.getStatusMetrics();
for (final String metricName : metricNames) {
if (!metrics.containsKey(metricName)) {
metrics.put(metricName, 0L);
}
}
}
final StatusHistoryDTO dto = new StatusHistoryDTO();
dto.setGenerated(new Date());
dto.setComponentDetails(componentDetails);
dto.setFieldDescriptors(StatusHistoryUtil.createFieldDescriptorDtos(metricDescriptors));
dto.setAggregateSnapshots(snapshotDtos);
return dto;
}
public static StatusDescriptorDTO createStatusDescriptorDto(final MetricDescriptor<?> metricDescriptor) {
final StatusDescriptorDTO dto = new StatusDescriptorDTO();
dto.setDescription(metricDescriptor.getDescription());
dto.setField(metricDescriptor.getField());
dto.setFormatter(metricDescriptor.getFormatter().name());
dto.setLabel(metricDescriptor.getLabel());
return dto;
}
public static List<StatusDescriptorDTO> createFieldDescriptorDtos(final Collection<MetricDescriptor<?>> metricDescriptors) {
final StatusDescriptorDTO[] standardMetricDescriptors = new StatusDescriptorDTO[metricDescriptors.size()];
final List<StatusDescriptorDTO> counterMetricDescriptors = new LinkedList<>();
for (final MetricDescriptor<?> metricDescriptor : metricDescriptors) {
if (metricDescriptor instanceof StandardMetricDescriptor) {
standardMetricDescriptors[metricDescriptor.getMetricIdentifier()] = createStatusDescriptorDto(metricDescriptor);
} else if (metricDescriptor instanceof CounterMetricDescriptor) {
counterMetricDescriptors.add(createStatusDescriptorDto(metricDescriptor));
} else {
throw new IllegalArgumentException("Unknown metric descriptor type: " + metricDescriptor.getClass().getName());
}
}
// Ordered standard metric descriptors are added first than counter metric descriptors in the order of appearance.
final List<StatusDescriptorDTO> result = new ArrayList<>(metricDescriptors.size());
result.addAll(Arrays.asList(standardMetricDescriptors).stream().filter(i -> i != null).collect(Collectors.toList()));
result.addAll(counterMetricDescriptors);
return result;
}
public static List<StatusDescriptorDTO> createFieldDescriptorDtos(final StatusHistory statusHistory) {
final List<StatusDescriptorDTO> dtos = new ArrayList<>();
final Set<MetricDescriptor<?>> allDescriptors = new LinkedHashSet<>();
for (final StatusSnapshot statusSnapshot : statusHistory.getStatusSnapshots()) {
allDescriptors.addAll(statusSnapshot.getMetricDescriptors());
}
for (final MetricDescriptor<?> metricDescriptor : allDescriptors) {
dtos.add(createStatusDescriptorDto(metricDescriptor));
}
return dtos;
}
public static StatusSnapshotDTO createStatusSnapshotDto(final StatusSnapshot statusSnapshot) {
final StatusSnapshotDTO dto = new StatusSnapshotDTO();
dto.setTimestamp(statusSnapshot.getTimestamp());
final Map<String, Long> statusMetrics = new HashMap<>();
for (final MetricDescriptor<?> descriptor : statusSnapshot.getMetricDescriptors()) {
statusMetrics.put(descriptor.getField(), statusSnapshot.getStatusMetric(descriptor));
}
dto.setStatusMetrics(statusMetrics);
return dto;
}
}