derrickaw commented on code in PR #38362: URL: https://github.com/apache/beam/pull/38362#discussion_r3182139709
########## sdks/java/io/datadog/src/main/java/org/apache/beam/sdk/io/datadog/DatadogWriteSchemaTransformProvider.java: ########## @@ -0,0 +1,279 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.beam.sdk.io.datadog; + +import static org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.base.Preconditions.checkNotNull; + +import com.google.auto.service.AutoService; +import java.util.Collections; +import java.util.List; +import org.apache.beam.sdk.schemas.Schema; +import org.apache.beam.sdk.schemas.transforms.SchemaTransform; +import org.apache.beam.sdk.schemas.transforms.SchemaTransformProvider; +import org.apache.beam.sdk.schemas.transforms.TypedSchemaTransformProvider; +import org.apache.beam.sdk.schemas.transforms.providers.ErrorHandling; +import org.apache.beam.sdk.transforms.DoFn; +import org.apache.beam.sdk.transforms.ParDo; +import org.apache.beam.sdk.values.PCollection; +import org.apache.beam.sdk.values.PCollectionRowTuple; +import org.apache.beam.sdk.values.PCollectionTuple; +import org.apache.beam.sdk.values.Row; +import org.apache.beam.sdk.values.TupleTag; +import org.apache.beam.sdk.values.TupleTagList; + +@AutoService(SchemaTransformProvider.class) +public class DatadogWriteSchemaTransformProvider + extends TypedSchemaTransformProvider<DatadogWriteSchemaTransformConfiguration> { + private static final String IDENTIFIER = "beam:schematransform:org.apache.beam:datadog_write:v1"; + static final String INPUT = "input"; + static final String OUTPUT = "output"; + static final String ERROR = "errors"; + public static final TupleTag<Row> ERROR_TAG = new TupleTag<Row>() {}; + public static final TupleTag<Void> OUTPUT_TAG = new TupleTag<Void>() {}; + public static final TupleTag<DatadogEvent> EVENT_TAG = new TupleTag<DatadogEvent>() {}; + + @Override + protected Class<DatadogWriteSchemaTransformConfiguration> configurationClass() { + return DatadogWriteSchemaTransformConfiguration.class; + } + + /** Returns the expected {@link SchemaTransform} of the configuration. */ + @Override + protected SchemaTransform from(DatadogWriteSchemaTransformConfiguration configuration) { + return new DatadogWriteSchemaTransform(configuration); + } + + /** Implementation of the {@link TypedSchemaTransformProvider} identifier method. */ + @Override + public String identifier() { + return IDENTIFIER; + } + + /** Implementation of the {@link TypedSchemaTransformProvider} input collection names method. */ + @Override + public List<String> inputCollectionNames() { + return Collections.singletonList(INPUT); + } + + /** Implementation of the {@link TypedSchemaTransformProvider} output collection names method. */ + @Override + public List<String> outputCollectionNames() { + return Collections.singletonList(ERROR); + } + + /** + * An implementation of {@link SchemaTransform} for Datadog Write jobs configured using {@link + * DatadogWriteSchemaTransformConfiguration}. + */ + static class DatadogWriteSchemaTransform extends SchemaTransform { + private final DatadogWriteSchemaTransformConfiguration configuration; + + DatadogWriteSchemaTransform(DatadogWriteSchemaTransformConfiguration configuration) { + this.configuration = configuration; + } + + @Override + public PCollectionRowTuple expand(PCollectionRowTuple input) { + // Validate configuration parameters + configuration.validate(); + + // Obtain input rows + PCollection<Row> inputRows = input.get(INPUT); + + // Check for errors + boolean handleErrors = ErrorHandling.hasOutput(configuration.getErrorHandling()); + + Schema inputSchema = inputRows.getSchema(); + Schema dynamicErrorSchema = + Schema.builder() + .addNullableRowField("failed_row", inputSchema) + .addNullableField("payload", Schema.FieldType.STRING) + .addNullableField("statusCode", Schema.FieldType.INT32) + .addNullableField("statusMessage", Schema.FieldType.STRING) + .build(); + + PCollectionTuple convertResult = + inputRows.apply( + "Convert to DatadogEvent", + ParDo.of(new RowToEventFn(handleErrors, ERROR_TAG, dynamicErrorSchema)) + .withOutputTags(EVENT_TAG, TupleTagList.of(ERROR_TAG))); + + PCollection<DatadogEvent> datadogEvents = + convertResult.get(EVENT_TAG).setCoder(DatadogEventCoder.of()); + PCollection<Row> conversionErrors = + convertResult + .get(ERROR_TAG) + .setCoder(org.apache.beam.sdk.coders.RowCoder.of(dynamicErrorSchema)); + + // Configure DatadogIO.Write + DatadogIO.Write.Builder builder = + DatadogIO.writeBuilder(configuration.getMinBatchCount()) + .withUrl(configuration.getUrl()) + .withApiKey(configuration.getApiKey()); + + Integer batchCount = configuration.getBatchCount(); + if (batchCount != null) { + builder = builder.withBatchCount(batchCount); + } + Long maxBufferSize = configuration.getMaxBufferSize(); + if (maxBufferSize != null) { + builder = builder.withMaxBufferSize(maxBufferSize); + } + Integer parallelism = configuration.getParallelism(); + if (parallelism != null) { + builder = builder.withParallelism(parallelism); + } + + DatadogIO.Write write = builder.build(); + + // Apply DatadogIO.Write + PCollection<DatadogWriteError> writeErrors = datadogEvents.apply("Write To Datadog", write); + + // Handle errors + ErrorHandling errorHandling = configuration.getErrorHandling(); + if (errorHandling != null) { + PCollection<Row> writeErrorRows = + writeErrors + .apply( + "Convert Write Errors to Rows", + org.apache.beam.sdk.transforms.MapElements.into( + org.apache.beam.sdk.values.TypeDescriptors.rows()) + .via( + error -> + Row.withSchema(dynamicErrorSchema) + .addValue(null) + .addValue(error.payload()) + .addValue(error.statusCode()) + .addValue(error.statusMessage()) + .build())) + .setCoder(org.apache.beam.sdk.coders.RowCoder.of(dynamicErrorSchema)); + + PCollection<Row> allErrors = + org.apache.beam.sdk.values.PCollectionList.of(conversionErrors) + .and(writeErrorRows) + .apply("Flatten Errors", org.apache.beam.sdk.transforms.Flatten.pCollections()) + .setCoder(org.apache.beam.sdk.coders.RowCoder.of(dynamicErrorSchema)); + + return PCollectionRowTuple.of(errorHandling.getOutput(), allErrors); + } else { + return PCollectionRowTuple.empty(input.getPipeline()); + } + } + } + + static final Schema WRITE_ERROR_SCHEMA = + Schema.builder() + .addNullableField("payload", Schema.FieldType.STRING) + .addNullableField("statusCode", Schema.FieldType.INT32) + .addNullableField("statusMessage", Schema.FieldType.STRING) + .build(); + + static final Schema DATADOG_EVENT_SCHEMA = + Schema.builder() + .addNullableField("ddsource", Schema.FieldType.STRING) + .addNullableField("ddtags", Schema.FieldType.STRING) + .addNullableField("hostname", Schema.FieldType.STRING) + .addNullableField("service", Schema.FieldType.STRING) + .addNullableField("message", Schema.FieldType.STRING) + .build(); + + static Row eventToRow(DatadogEvent event) { + return Row.withSchema(DATADOG_EVENT_SCHEMA) + .addValue(event.ddsource()) + .addValue(event.ddtags()) + .addValue(event.hostname()) + .addValue(event.service()) + .addValue(event.message()) + .build(); + } + + static DatadogEvent rowToEvent(Row row) { + DatadogEvent.Builder builder = DatadogEvent.newBuilder(); + Schema schema = row.getSchema(); + + String ddsource = schema.hasField("ddsource") ? row.getString("ddsource") : null; + if (ddsource != null) { + builder.withSource(ddsource); + } + String ddtags = schema.hasField("ddtags") ? row.getString("ddtags") : null; + if (ddtags != null) { + builder.withTags(ddtags); + } + String hostname = schema.hasField("hostname") ? row.getString("hostname") : null; + if (hostname != null) { + builder.withHostname(hostname); + } + String service = schema.hasField("service") ? row.getString("service") : null; + if (service != null) { + builder.withService(service); + } + String message = schema.hasField("message") ? row.getString("message") : null; + builder.withMessage(checkNotNull(message, "Message is required.")); + + return builder.build(); + } + + static class RowToEventFn extends DoFn<Row, DatadogEvent> { + private final boolean handleErrors; + private final TupleTag<Row> errorOutputTag; + private final Schema errorSchema; + + RowToEventFn(boolean handleErrors, TupleTag<Row> errorOutputTag, Schema errorSchema) { + this.handleErrors = handleErrors; + this.errorOutputTag = errorOutputTag; + this.errorSchema = errorSchema; + } + + @ProcessElement + public void processElement(ProcessContext c) { + try { + c.output(rowToEvent(c.element())); + } catch (Exception e) { + if (handleErrors) { + c.output( + errorOutputTag, + Row.withSchema(errorSchema) + .addValue(c.element()) + .addValue(c.element().toString()) Review Comment: fair point in one way - updated -- This is an automated message from the Apache Git Service. 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