Examples with ValueMapper org.apache.nifi.controller.status.history.ValueMapper used on opensource projects

Example 1 with ValueMapper

use of org.apache.nifi.controller.status.history.ValueMapper in project nifi by apache.

the class StatusHistoryEndpointMerger method merge.

@Override
public NodeResponse merge(URI uri, String method, Set<NodeResponse> successfulResponses, Set<NodeResponse> problematicResponses, NodeResponse clientResponse) {
    final Map<String, MetricDescriptor<?>> metricDescriptors = getStandardMetricDescriptors(uri);
    final StatusHistoryEntity responseEntity = clientResponse.getClientResponse().readEntity(StatusHistoryEntity.class);
    final Set<StatusDescriptorDTO> fieldDescriptors = new LinkedHashSet<>();
    boolean includeCounters = true;
    StatusHistoryDTO lastStatusHistory = null;
    final List<NodeStatusSnapshotsDTO> nodeStatusSnapshots = new ArrayList<>(successfulResponses.size());
    LinkedHashMap<String, String> noReadPermissionsComponentDetails = null;
    for (final NodeResponse nodeResponse : successfulResponses) {
        final StatusHistoryEntity nodeResponseEntity = nodeResponse == clientResponse ? responseEntity : nodeResponse.getClientResponse().readEntity(StatusHistoryEntity.class);
        final StatusHistoryDTO nodeStatus = nodeResponseEntity.getStatusHistory();
        lastStatusHistory = nodeStatus;
        if (noReadPermissionsComponentDetails == null && !nodeResponseEntity.getCanRead()) {
            // If component details from a history with no read permissions is encountered for the first time, hold on to them to be used in the merged response
            noReadPermissionsComponentDetails = nodeStatus.getComponentDetails();
        }
        if (!Boolean.TRUE.equals(nodeResponseEntity.getCanRead())) {
            includeCounters = false;
        }
        final NodeIdentifier nodeId = nodeResponse.getNodeId();
        final NodeStatusSnapshotsDTO nodeStatusSnapshot = new NodeStatusSnapshotsDTO();
        nodeStatusSnapshot.setNodeId(nodeId.getId());
        nodeStatusSnapshot.setAddress(nodeId.getApiAddress());
        nodeStatusSnapshot.setApiPort(nodeId.getApiPort());
        nodeStatusSnapshot.setStatusSnapshots(nodeStatus.getAggregateSnapshots());
        nodeStatusSnapshots.add(nodeStatusSnapshot);
        final List<StatusDescriptorDTO> descriptors = nodeStatus.getFieldDescriptors();
        if (descriptors != null) {
            fieldDescriptors.addAll(descriptors);
        }
    }
    // the user is not authorized, we want to assume that the user is, in fact, not authorized.
    if (includeCounters) {
        for (final StatusDescriptorDTO descriptorDto : fieldDescriptors) {
            final String fieldName = descriptorDto.getField();
            if (!metricDescriptors.containsKey(fieldName)) {
                final ValueMapper<ProcessorStatus> valueMapper = s -> {
                    final Map<String, Long> counters = s.getCounters();
                    if (counters == null) {
                        return 0L;
                    }
                    return counters.getOrDefault(descriptorDto.getField(), 0L);
                };
                final MetricDescriptor<ProcessorStatus> metricDescriptor = new StandardMetricDescriptor<>(descriptorDto.getField(), descriptorDto.getLabel(), descriptorDto.getDescription(), Formatter.COUNT, valueMapper);
                metricDescriptors.put(fieldName, metricDescriptor);
            }
        }
    }
    final StatusHistoryDTO clusterStatusHistory = new StatusHistoryDTO();
    clusterStatusHistory.setAggregateSnapshots(mergeStatusHistories(nodeStatusSnapshots, metricDescriptors));
    clusterStatusHistory.setGenerated(new Date());
    clusterStatusHistory.setNodeSnapshots(nodeStatusSnapshots);
    if (lastStatusHistory != null) {
        clusterStatusHistory.setComponentDetails(noReadPermissionsComponentDetails == null ? lastStatusHistory.getComponentDetails() : noReadPermissionsComponentDetails);
    }
    clusterStatusHistory.setFieldDescriptors(new ArrayList<>(fieldDescriptors));
    final StatusHistoryEntity clusterEntity = new StatusHistoryEntity();
    clusterEntity.setStatusHistory(clusterStatusHistory);
    clusterEntity.setCanRead(noReadPermissionsComponentDetails == null);
    return new NodeResponse(clientResponse, clusterEntity);
}