Examples with KyloCatalogReadRequest com.thinkbiganalytics.spark.rest.model.KyloCatalogReadRequest used on opensource projects

Example 1 with KyloCatalogReadRequest

use of com.thinkbiganalytics.spark.rest.model.KyloCatalogReadRequest in project kylo by Teradata.

the class SparkShellProxyController method preview.

@POST
@Path("/preview")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
@ApiOperation("Returns the dataset preview")
@ApiResponses({ @ApiResponse(code = 200, message = "Returns the status of the file-metadata job.", response = PreviewDataSetTransformResponse.class), @ApiResponse(code = 400, message = "The requested data source does not exist.", response = RestResponseStatus.class), @ApiResponse(code = 500, message = "There was a problem processing the data.", response = RestResponseStatus.class) })
public Response preview(PreviewDataSetRequest previewRequest) {
    DataSource catalogDataSource = fetchCatalogDataSource(previewRequest.getDataSource().getId());
    previewRequest.setDataSource(catalogDataSource);
    if (previewRequest.isFilePreview() && previewRequest.getSchemaParser() == null) {
        // set it to a text preview
        previewRequest.setSchemaParser(getTextSchemaParserDescriptor());
    }
    KyloCatalogReadRequest request = KyloCatalogReaderUtil.toKyloCatalogRequest(previewRequest);
    final SparkShellProcess process = getSparkShellProcess();
    return getTransformResponse(() -> {
        PreviewDataSetTransformResponse response = null;
        boolean fallbackToTextParser = previewRequest.isFallbackToTextOnError();
        try {
            TransformResponse transformResponse = restClient.kyloCatalogTransform(process, request);
            response = new PreviewDataSetTransformResponse(transformResponse, previewRequest.getSchemaParser());
        } catch (Exception e) {
            // should we attempt to re preview the data as plain text
            if (fallbackToTextParser && previewRequest.getSchemaParser() != null && !"text".equalsIgnoreCase(previewRequest.getSchemaParser().getSparkFormat())) {
                previewRequest.setSchemaParser(getTextSchemaParserDescriptor());
                KyloCatalogReadRequest request2 = KyloCatalogReaderUtil.toKyloCatalogRequest(previewRequest);
                TransformResponse transformResponse = restClient.kyloCatalogTransform(process, request2);
                response = new PreviewDataSetTransformResponse(transformResponse, previewRequest.getSchemaParser());
            } else {
                throw e;
            }
            throw e;
        }
        return response;
    });
}

Example 2 with KyloCatalogReadRequest

use of com.thinkbiganalytics.spark.rest.model.KyloCatalogReadRequest in project kylo by Teradata.

the class KyloCatalogReaderUtil method toKyloCatalogRequest.

public static KyloCatalogReadRequest toKyloCatalogRequest(PreviewDataSetRequest previewRequest) {
    DataSource dataSource = previewRequest.getDataSource();
    Connector connector = dataSource.getConnector();
    // merge template
    DataSetTemplate dataSetTemplate = DataSourceUtil.mergeTemplates(dataSource);
    // get data out of the dataset template
    List<String> jars = dataSetTemplate.getJars();
    List<String> paths = dataSetTemplate.getPaths();
    List<String> files = dataSetTemplate.getFiles();
    String format = dataSetTemplate.getFormat();
    Map<String, String> options = dataSetTemplate.getOptions();
    if (options == null) {
        options = new HashMap<>();
    }
    // parse the SchemaParser if it exists and add options and update the format
    if (previewRequest.getSchemaParser() != null) {
        SchemaParserDescriptor schemaParser = previewRequest.getSchemaParser();
        Map<String, String> sparkOptions = schemaParser.getProperties().stream().collect(Collectors.toMap(p -> p.getAdditionalProperties().stream().filter(labelValue -> "spark.option".equalsIgnoreCase(labelValue.getLabel())).map(labelValue -> labelValue.getValue()).findFirst().orElse(""), p -> p.getValue()));
        // remove any options that produced an empty key
        sparkOptions.remove("");
        // supplied options by the schema parse take precedence over the template options
        options.putAll(sparkOptions);
        format = schemaParser.getSparkFormat();
    }
    // add in additional preview options
    if (previewRequest.getProperties() != null && !previewRequest.getProperties().isEmpty()) {
        options.putAll(previewRequest.getProperties());
    }
    KyloCatalogReadRequest request = new KyloCatalogReadRequest();
    request.setFiles(files);
    request.setJars(jars);
    request.setFormat(format);
    request.setOptions(options);
    if (previewRequest.getPreviewItem() != null && previewRequest.isAddPreviewItemToPath()) {
        request.addPath(previewRequest.getPreviewItem());
    }
    PageSpec pageSpec = previewRequest.getPageSpec();
    if (pageSpec == null) {
        pageSpec = new PageSpec();
    }
    request.setPageSpec(pageSpec);
    return request;
}