Examples with StringResult org.apache.nifi.toolkit.cli.impl.result.StringResult used on opensource projects

Example 11 with StringResult

use of org.apache.nifi.toolkit.cli.impl.result.StringResult in project nifi by apache.

the class ImportFlowVersion method doExecute.

@Override
public StringResult doExecute(final NiFiRegistryClient client, final Properties properties) throws ParseException, IOException, NiFiRegistryException {
    final String flowId = getRequiredArg(properties, CommandOption.FLOW_ID);
    final String inputFile = getRequiredArg(properties, CommandOption.INPUT_SOURCE);
    String contents;
    try {
        // try a public resource URL
        URL url = new URL(inputFile);
        contents = IOUtils.toString(url, StandardCharsets.UTF_8);
    } catch (MalformedURLException e) {
        // assume a local file then
        URI uri = Paths.get(inputFile).toAbsolutePath().toUri();
        contents = IOUtils.toString(uri, StandardCharsets.UTF_8);
    }
    final FlowSnapshotClient snapshotClient = client.getFlowSnapshotClient();
    final ObjectMapper objectMapper = JacksonUtils.getObjectMapper();
    final VersionedFlowSnapshot deserializedSnapshot = objectMapper.readValue(contents, VersionedFlowSnapshot.class);
    if (deserializedSnapshot == null) {
        throw new IOException("Unable to deserialize flow version from " + inputFile);
    }
    // determine the bucket for the provided flow id
    final String bucketId = getBucketId(client, flowId);
    // determine the latest existing version in the destination system
    Integer version;
    try {
        final VersionedFlowSnapshotMetadata latestMetadata = snapshotClient.getLatestMetadata(bucketId, flowId);
        version = latestMetadata.getVersion() + 1;
    } catch (NiFiRegistryException e) {
        // when there are no versions it produces a 404 not found
        version = 1;
    }
    // create new metadata using the passed in bucket and flow in the target registry, keep comments
    final VersionedFlowSnapshotMetadata metadata = new VersionedFlowSnapshotMetadata();
    metadata.setBucketIdentifier(bucketId);
    metadata.setFlowIdentifier(flowId);
    metadata.setVersion(version);
    metadata.setComments(deserializedSnapshot.getSnapshotMetadata().getComments());
    // create a new snapshot using the new metadata and the contents from the deserialized snapshot
    final VersionedFlowSnapshot snapshot = new VersionedFlowSnapshot();
    snapshot.setSnapshotMetadata(metadata);
    snapshot.setFlowContents(deserializedSnapshot.getFlowContents());
    final VersionedFlowSnapshot createdSnapshot = snapshotClient.create(snapshot);
    final VersionedFlowSnapshotMetadata createdMetadata = createdSnapshot.getSnapshotMetadata();
    return new StringResult(String.valueOf(createdMetadata.getVersion()), getContext().isInteractive());
}