Examples with TransformerWriter org.talend.dataprep.transformation.api.transformer.TransformerWriter used on opensource projects

Example 1 with TransformerWriter

use of org.talend.dataprep.transformation.api.transformer.TransformerWriter in project data-prep by Talend.

the class PipelineDiffTransformer method buildExecutable.

/**
 * Starts the transformation in preview mode.
 *
 * @param input the dataset content.
 * @param configuration The {@link Configuration configuration} for this transformation.
 */
@Override
public ExecutableTransformer buildExecutable(DataSet input, Configuration configuration) {
    Validate.notNull(input, "Input cannot be null.");
    final PreviewConfiguration previewConfiguration = (PreviewConfiguration) configuration;
    final RowMetadata rowMetadata = input.getMetadata().getRowMetadata();
    final TransformerWriter writer = writerRegistrationService.getWriter(configuration.formatId(), configuration.output(), configuration.getArguments());
    // Build diff pipeline
    final Node diffWriterNode = new DiffWriterNode(writer);
    final String referenceActions = previewConfiguration.getReferenceActions();
    final String previewActions = previewConfiguration.getPreviewActions();
    final Pipeline referencePipeline = buildPipeline(rowMetadata, referenceActions);
    final Pipeline previewPipeline = buildPipeline(rowMetadata, previewActions);
    // Filter source records (extract TDP ids information)
    final List<Long> indexes = previewConfiguration.getIndexes();
    final boolean isIndexLimited = indexes != null && !indexes.isEmpty();
    final Long minIndex = isIndexLimited ? indexes.stream().mapToLong(Long::longValue).min().getAsLong() : 0L;
    final Long maxIndex = isIndexLimited ? indexes.stream().mapToLong(Long::longValue).max().getAsLong() : Long.MAX_VALUE;
    final Predicate<DataSetRow> filter = isWithinWantedIndexes(minIndex, maxIndex);
    // Build diff pipeline
    final Node diffPipeline = // 
    NodeBuilder.filteredSource(filter).dispatchTo(referencePipeline, // 
    previewPipeline).zipTo(// 
    diffWriterNode).build();
    // wrap this transformer into an ExecutableTransformer
    return new ExecutableTransformer() {

        @Override
        public void execute() {
            // Run diff
            try {
                // Print pipeline before execution (for debug purposes).
                diffPipeline.logStatus(LOGGER, "Before execution: {}");
                input.getRecords().forEach(r -> diffPipeline.exec().receive(r, rowMetadata));
                diffPipeline.exec().signal(Signal.END_OF_STREAM);
            } finally {
                // Print pipeline after execution (for debug purposes).
                diffPipeline.logStatus(LOGGER, "After execution: {}");
            }
        }

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

Example 2 with TransformerWriter

use of org.talend.dataprep.transformation.api.transformer.TransformerWriter in project data-prep by Talend.

the class WriterRegistrationServiceTest method shouldReturnSimpleWriter.

@Test
public void shouldReturnSimpleWriter() {
    final TransformerWriter jsonWriter = service.getWriter(JsonFormat.JSON, output, Collections.emptyMap());
    Assert.assertTrue(jsonWriter instanceof JsonWriter);
}

Example 3 with TransformerWriter

use of org.talend.dataprep.transformation.api.transformer.TransformerWriter in project data-prep by Talend.

the class WriterRegistrationServiceTest method shouldReturnWriterWithParameter.

@Test
public void shouldReturnWriterWithParameter() {
    Map<String, String> parameters = new HashMap<>();
    parameters.put(CSVWriterTest.SEPARATOR_PARAM_NAME, "|");
    final TransformerWriter csvWriter = service.getWriter(CSVFormat.CSV, output, parameters);
    Assert.assertTrue(csvWriter instanceof CSVWriter);
}

Example 4 with TransformerWriter

use of org.talend.dataprep.transformation.api.transformer.TransformerWriter 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);
        }
    };
}