Examples with TransformationMetadataCacheKey org.talend.dataprep.cache.TransformationMetadataCacheKey used on opensource projects

Example 6 with TransformationMetadataCacheKey

use of org.talend.dataprep.cache.TransformationMetadataCacheKey in project data-prep by Talend.

the class TransformationService method executeDiffOnSample.

private void executeDiffOnSample(final PreviewParameters previewParameters, final OutputStream output) {
    final TransformationMetadataCacheKey metadataKey = // 
    cacheKeyGenerator.generateMetadataKey(// 
    previewParameters.getPreparationId(), // 
    Step.ROOT_STEP.id(), // 
    previewParameters.getSourceType());
    final ContentCacheKey contentKey = // 
    cacheKeyGenerator.generateContentKey(// 
    previewParameters.getDataSetId(), // 
    previewParameters.getPreparationId(), // 
    Step.ROOT_STEP.id(), // 
    JSON, // 
    previewParameters.getSourceType(), // no filters for preview
    "");
    try (// 
    final InputStream metadata = contentCache.get(metadataKey);
        // 
        final InputStream content = contentCache.get(contentKey);
        final JsonParser contentParser = mapper.getFactory().createParser(new InputStreamReader(content, UTF_8))) {
        // build metadata
        final RowMetadata rowMetadata = mapper.readerFor(RowMetadata.class).readValue(metadata);
        final DataSetMetadata dataSetMetadata = new DataSetMetadata();
        dataSetMetadata.setRowMetadata(rowMetadata);
        // build dataset
        final DataSet dataSet = mapper.readerFor(DataSet.class).readValue(contentParser);
        dataSet.setMetadata(dataSetMetadata);
        // trigger diff
        executePreview(// 
        previewParameters.getNewActions(), // 
        previewParameters.getBaseActions(), // 
        previewParameters.getTdpIds(), // 
        dataSet, // 
        output);
    } catch (final IOException e) {
        throw new TDPException(TransformationErrorCodes.UNABLE_TO_PERFORM_PREVIEW, e);
    }
}

Example 7 with TransformationMetadataCacheKey

use of org.talend.dataprep.cache.TransformationMetadataCacheKey in project data-prep by Talend.

the class PipelineTransformer method buildExecutable.

@Override
public ExecutableTransformer buildExecutable(DataSet input, Configuration configuration) {
    final RowMetadata rowMetadata = input.getMetadata().getRowMetadata();
    // prepare the fallback row metadata
    RowMetadata fallBackRowMetadata = transformationRowMetadataUtils.getMatchingEmptyRowMetadata(rowMetadata);
    final TransformerWriter writer = writerRegistrationService.getWriter(configuration.formatId(), configuration.output(), configuration.getArguments());
    final ConfiguredCacheWriter metadataWriter = new ConfiguredCacheWriter(contentCache, DEFAULT);
    final TransformationMetadataCacheKey metadataKey = cacheKeyGenerator.generateMetadataKey(configuration.getPreparationId(), configuration.stepId(), configuration.getSourceType());
    final PreparationMessage preparation = configuration.getPreparation();
    // function that from a step gives the rowMetadata associated to the previous/parent step
    final Function<Step, RowMetadata> previousStepRowMetadataSupplier = s -> // 
    Optional.ofNullable(s.getParent()).map(// 
    id -> preparationUpdater.get(id)).orElse(null);
    final Pipeline pipeline = // 
    Pipeline.Builder.builder().withAnalyzerService(// 
    analyzerService).withActionRegistry(// 
    actionRegistry).withPreparation(// 
    preparation).withActions(// 
    actionParser.parse(configuration.getActions())).withInitialMetadata(rowMetadata, // 
    configuration.volume() == SMALL).withMonitor(// 
    configuration.getMonitor()).withFilter(// 
    configuration.getFilter()).withLimit(// 
    configuration.getLimit()).withFilterOut(// 
    configuration.getOutFilter()).withOutput(// 
    () -> new WriterNode(writer, metadataWriter, metadataKey, fallBackRowMetadata)).withStatisticsAdapter(// 
    adapter).withStepMetadataSupplier(// 
    previousStepRowMetadataSupplier).withGlobalStatistics(// 
    configuration.isGlobalStatistics()).allowMetadataChange(// 
    configuration.isAllowMetadataChange()).build();
    // wrap this transformer into an executable transformer
    return new ExecutableTransformer() {

        @Override
        public void execute() {
            try {
                LOGGER.debug("Before transformation: {}", pipeline);
                pipeline.execute(input);
            } finally {
                LOGGER.debug("After transformation: {}", pipeline);
            }
            if (preparation != null) {
                final UpdatedStepVisitor visitor = new UpdatedStepVisitor(preparationUpdater);
                pipeline.accept(visitor);
            }
        }

        @Override
        public void signal(Signal signal) {
            pipeline.signal(signal);
        }
    };
}