Examples with StandardRepositoryRecord org.apache.nifi.controller.repository.StandardRepositoryRecord used on opensource projects

Example 1 with StandardRepositoryRecord

use of org.apache.nifi.controller.repository.StandardRepositoryRecord in project nifi by apache.

the class FlowController method replayFlowFile.

public ProvenanceEventRecord replayFlowFile(final ProvenanceEventRecord event, final NiFiUser user) throws IOException {
    if (event == null) {
        throw new NullPointerException();
    }
    // Check that the event is a valid type.
    final ProvenanceEventType type = event.getEventType();
    if (type == ProvenanceEventType.JOIN) {
        throw new IllegalArgumentException("Cannot replay events that are created from multiple parents");
    }
    // Make sure event has the Content Claim info
    final Long contentSize = event.getPreviousFileSize();
    final String contentClaimId = event.getPreviousContentClaimIdentifier();
    final String contentClaimSection = event.getPreviousContentClaimSection();
    final String contentClaimContainer = event.getPreviousContentClaimContainer();
    if (contentSize == null || contentClaimId == null || contentClaimSection == null || contentClaimContainer == null) {
        throw new IllegalArgumentException("Cannot replay data from Provenance Event because the event does not contain the required Content Claim");
    }
    // Make sure that the source queue exists
    if (event.getSourceQueueIdentifier() == null) {
        throw new IllegalArgumentException("Cannot replay data from Provenance Event because the event does not specify the Source FlowFile Queue");
    }
    final List<Connection> connections = getGroup(getRootGroupId()).findAllConnections();
    FlowFileQueue queue = null;
    for (final Connection connection : connections) {
        if (event.getSourceQueueIdentifier().equals(connection.getIdentifier())) {
            queue = connection.getFlowFileQueue();
            break;
        }
    }
    if (queue == null) {
        throw new IllegalStateException("Cannot replay data from Provenance Event because the Source FlowFile Queue with ID " + event.getSourceQueueIdentifier() + " no longer exists");
    }
    // Create the ContentClaim. To do so, we first need the appropriate Resource Claim. Because we don't know whether or
    // not the Resource Claim is still active, we first call ResourceClaimManager.getResourceClaim. If this returns
    // null, then we know that the Resource Claim is no longer active and can just create a new one that is not writable.
    // It's critical though that we first call getResourceClaim because otherwise, if the Resource Claim is active and we
    // create a new one that is not writable, we could end up archiving or destroying the Resource Claim while it's still
    // being written to by the Content Repository. This is important only because we are creating a FlowFile with this Resource
    // Claim. If, for instance, we are simply creating the claim to request its content, as in #getContentAvailability, etc.
    // then this is not necessary.
    ResourceClaim resourceClaim = resourceClaimManager.getResourceClaim(event.getPreviousContentClaimContainer(), event.getPreviousContentClaimSection(), event.getPreviousContentClaimIdentifier());
    if (resourceClaim == null) {
        resourceClaim = resourceClaimManager.newResourceClaim(event.getPreviousContentClaimContainer(), event.getPreviousContentClaimSection(), event.getPreviousContentClaimIdentifier(), false, false);
    }
    // Increment Claimant Count, since we will now be referencing the Content Claim
    resourceClaimManager.incrementClaimantCount(resourceClaim);
    final long claimOffset = event.getPreviousContentClaimOffset() == null ? 0L : event.getPreviousContentClaimOffset().longValue();
    final StandardContentClaim contentClaim = new StandardContentClaim(resourceClaim, claimOffset);
    contentClaim.setLength(event.getPreviousFileSize() == null ? -1L : event.getPreviousFileSize());
    if (!contentRepository.isAccessible(contentClaim)) {
        resourceClaimManager.decrementClaimantCount(resourceClaim);
        throw new IllegalStateException("Cannot replay data from Provenance Event because the data is no longer available in the Content Repository");
    }
    final String parentUUID = event.getFlowFileUuid();
    final String newFlowFileUUID = UUID.randomUUID().toString();
    // We need to create a new FlowFile by populating it with information from the
    // Provenance Event. Particularly of note here is that we are setting the FlowFile's
    // contentClaimOffset to 0. This is done for backward compatibility reasons. ContentClaim
    // used to not have a concept of an offset, and the offset was tied only to the FlowFile. This
    // was later refactored, so that the offset was part of the ContentClaim. If we set the offset
    // in both places, we'll end up skipping over that many bytes twice instead of once (once to get
    // to the beginning of the Content Claim and again to get to the offset within that Content Claim).
    // To avoid this, we just always set the offset in the Content Claim itself and set the
    // FlowFileRecord's contentClaimOffset to 0.
    final FlowFileRecord flowFileRecord = new StandardFlowFileRecord.Builder().addAttributes(event.getPreviousAttributes()).contentClaim(contentClaim).contentClaimOffset(// use 0 because we used the content claim offset in the Content Claim itself
    0L).entryDate(System.currentTimeMillis()).id(flowFileRepository.getNextFlowFileSequence()).lineageStart(event.getLineageStartDate(), 0L).size(contentSize.longValue()).addAttribute("flowfile.replay", "true").addAttribute("flowfile.replay.timestamp", String.valueOf(new Date())).addAttribute(CoreAttributes.UUID.key(), newFlowFileUUID).removeAttributes(CoreAttributes.DISCARD_REASON.key(), CoreAttributes.ALTERNATE_IDENTIFIER.key()).build();
    // Register a Provenance Event to indicate that we replayed the data.
    final ProvenanceEventRecord replayEvent = new StandardProvenanceEventRecord.Builder().setEventType(ProvenanceEventType.REPLAY).addChildUuid(newFlowFileUUID).addParentUuid(parentUUID).setFlowFileUUID(parentUUID).setAttributes(Collections.emptyMap(), flowFileRecord.getAttributes()).setCurrentContentClaim(event.getContentClaimContainer(), event.getContentClaimSection(), event.getContentClaimIdentifier(), event.getContentClaimOffset(), event.getFileSize()).setDetails("Replay requested by " + user.getIdentity()).setEventTime(System.currentTimeMillis()).setFlowFileEntryDate(System.currentTimeMillis()).setLineageStartDate(event.getLineageStartDate()).setComponentType(event.getComponentType()).setComponentId(event.getComponentId()).build();
    provenanceRepository.registerEvent(replayEvent);
    // Update the FlowFile Repository to indicate that we have added the FlowFile to the flow
    final StandardRepositoryRecord record = new StandardRepositoryRecord(queue);
    record.setWorking(flowFileRecord);
    record.setDestination(queue);
    flowFileRepository.updateRepository(Collections.singleton(record));
    // Enqueue the data
    queue.put(flowFileRecord);
    return replayEvent;
}