[yaml] - mongodb write normalization

sdks/java/io/expansion-service/build.gradle

@@ -92,6 +92,7 @@ dependencies {
     runtimeOnly project(path: ":sdks:java:io:iceberg:bqms", configuration: "shadow")
   }
 
+  runtimeOnly project(":sdks:java:io:mongodb")
   runtimeOnly library.java.kafka_clients
   runtimeOnly library.java.slf4j_jdk14
 

sdks/java/io/mongodb/src/main/java/org/apache/beam/sdk/io/mongodb/MongoDbWriteSchemaTransformConfiguration.java

@@ -0,0 +1,85 @@
+/*
+ * 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.mongodb;
+
+import static org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.base.Preconditions.checkArgument;
+
+import com.google.auto.value.AutoValue;
+import java.io.Serializable;
+import org.apache.beam.sdk.schemas.AutoValueSchema;
+import org.apache.beam.sdk.schemas.annotations.DefaultSchema;
+import org.apache.beam.sdk.schemas.annotations.SchemaFieldDescription;
+import org.apache.beam.sdk.schemas.transforms.providers.ErrorHandling;
+import org.checkerframework.checker.nullness.qual.Nullable;
+
+/** Configuration class for the MongoDB Write transform. */
+@DefaultSchema(AutoValueSchema.class)
+@AutoValue
+public abstract class MongoDbWriteSchemaTransformConfiguration implements Serializable {
+
+  @SchemaFieldDescription("The connection URI for the MongoDB server.")
+  public abstract String getUri();
+
+  @SchemaFieldDescription("The MongoDB database to write to.")
+  public abstract String getDatabase();
+
+  @SchemaFieldDescription("The MongoDB collection to write to.")
+  public abstract String getCollection();
+
+  @SchemaFieldDescription("The number of documents to include in each batch write.")
+  @Nullable
+  public abstract Long getBatchSize();
+
+  @SchemaFieldDescription(
+      "This option specifies whether and where to output unwritable rows. Note: Error handling is currently limited to data conversion failures before sending to the MongoDB driver, as the underlying MongoDbIO does not yet support dead-letter queues for write failures.")
+  @Nullable
+  public abstract ErrorHandling getErrorHandling();
+
+  public void validate() {
+    checkArgument(getUri() != null && !getUri().isEmpty(), "MongoDB URI must be specified.");
+    checkArgument(
+        getDatabase() != null && !getDatabase().isEmpty(), "MongoDB database must be specified.");
+    checkArgument(
+        getCollection() != null && !getCollection().isEmpty(),
+        "MongoDB collection must be specified.");
+
+    Long batchSize = getBatchSize();
+    if (batchSize != null) {
+      checkArgument(batchSize > 0, "Batch size must be positive.");
+    }
+  }
+
+  public static Builder builder() {
+    return new AutoValue_MongoDbWriteSchemaTransformConfiguration.Builder();
+  }
+
+  @AutoValue.Builder
+  public abstract static class Builder {
+    public abstract Builder setUri(String uri);
+
+    public abstract Builder setDatabase(String database);
+
+    public abstract Builder setCollection(String collection);
+
+    public abstract Builder setBatchSize(Long batchSize);
+
+    public abstract Builder setErrorHandling(ErrorHandling errorHandling);
+
+    public abstract MongoDbWriteSchemaTransformConfiguration build();
+  }
+}

sdks/java/io/mongodb/src/main/java/org/apache/beam/sdk/io/mongodb/MongoDbWriteSchemaTransformProvider.java

@@ -0,0 +1,201 @@
+/*
+ * 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.mongodb;
+
+import com.google.auto.service.AutoService;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import org.apache.beam.sdk.schemas.Schema.Field;
+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;
+import org.bson.Document;
+import org.checkerframework.checker.nullness.qual.Nullable;
+
+/** An implementation of {@link TypedSchemaTransformProvider} for writing to MongoDB. */
+@AutoService(SchemaTransformProvider.class)
+public class MongoDbWriteSchemaTransformProvider
+    extends TypedSchemaTransformProvider<MongoDbWriteSchemaTransformConfiguration> {
+
+  private static final String INPUT_TAG = "input";
+  public static final TupleTag<Document> OUTPUT_TAG = new TupleTag<Document>() {};
+  public static final TupleTag<Row> ERROR_TAG = new TupleTag<Row>() {};
+
+  private static final org.apache.beam.sdk.metrics.Counter errorCounter =
+      org.apache.beam.sdk.metrics.Metrics.counter(
+          MongoDbWriteSchemaTransformProvider.class, "MongoDB-write-error-counter");
+
+  @Override
+  protected SchemaTransform from(MongoDbWriteSchemaTransformConfiguration configuration) {
+    return new MongoDbWriteSchemaTransform(configuration);
+  }
+
+  @Override
+  public String identifier() {
+    return "beam:schematransform:org.apache.beam:mongodb_write:v1";
+  }
+
+  @Override
+  public List<String> inputCollectionNames() {
+    return Collections.singletonList(INPUT_TAG);
+  }
+
+  /** The {@link SchemaTransform} that performs the write operation. */
+  private static class MongoDbWriteSchemaTransform extends SchemaTransform {
+    private final MongoDbWriteSchemaTransformConfiguration configuration;
+
+    MongoDbWriteSchemaTransform(MongoDbWriteSchemaTransformConfiguration configuration) {
+      configuration.validate();
+      this.configuration = configuration;
+    }
+
+    @Override
+    public PCollectionRowTuple expand(PCollectionRowTuple input) {
+      // Retrieve the input PCollection of Rows and its schema.
+      PCollection<Row> rows = input.get(INPUT_TAG);
+      org.apache.beam.sdk.schemas.Schema inputSchema = rows.getSchema();
+
+      // Determine if error handling is enabled and set up the error schema.
+      boolean handleErrors = ErrorHandling.hasOutput(configuration.getErrorHandling());
+      org.apache.beam.sdk.schemas.Schema errorSchema = ErrorHandling.errorSchema(inputSchema);
+
+      // Convert Beam Rows to BSON Documents, emitting errors to a separate tag if enabled.
+      PCollectionTuple outputTuple =
+          rows.apply(
+              "ConvertToDocument",
+              ParDo.of(new RowToBsonDocumentFn(handleErrors, errorSchema))
+                  .withOutputTags(OUTPUT_TAG, TupleTagList.of(ERROR_TAG)));
+
+      PCollection<Document> documents = outputTuple.get(OUTPUT_TAG);
+
+      // Configure the MongoDB write operation.
+      MongoDbIO.Write write =
+          MongoDbIO.write()
+              .withUri(configuration.getUri())
+              .withDatabase(configuration.getDatabase())
+              .withCollection(configuration.getCollection());
+
+      Long batchSize = configuration.getBatchSize();
+      if (batchSize != null) {
+        write = write.withBatchSize(batchSize);
+      }
+
+      // Apply the MongoDB write transform.
+      documents.apply("WriteToMongo", write);
+
+      // Extract and format the error collection.
+      PCollection<Row> errorOutput = outputTuple.get(ERROR_TAG).setRowSchema(errorSchema);
+
+      // Return the error collection as specified by the configuration.
+      ErrorHandling errorHandling = configuration.getErrorHandling();
+      return PCollectionRowTuple.of(
+          (handleErrors && errorHandling != null) ? errorHandling.getOutput() : "errors",
+          errorOutput);
+    }
+  }
+
+  /** Converts a Beam {@link Row} to a BSON {@link Document}. */
+  static class RowToBsonDocumentFn extends DoFn<Row, Document> {
+    private final boolean handleErrors;
+    private final org.apache.beam.sdk.schemas.Schema errorSchema;
+
+    RowToBsonDocumentFn(boolean handleErrors, org.apache.beam.sdk.schemas.Schema errorSchema) {
+      this.handleErrors = handleErrors;
+      this.errorSchema = errorSchema;
+    }
+
+    @ProcessElement
+    public void processElement(@Element Row row, MultiOutputReceiver receiver) {
+      try {
+        Object converted = convertToBsonValue(row);
+        if (converted instanceof Document) {
+          receiver.get(OUTPUT_TAG).output((Document) converted);
+        } else {
+          throw new IllegalStateException(
+              "Expected Document but got "
+                  + (converted != null ? converted.getClass().getName() : "null"));
+        }
+      } catch (Exception e) {
+        if (!handleErrors) {
+          throw new RuntimeException(e);
+        }
+        errorCounter.inc();
+        receiver.get(ERROR_TAG).output(ErrorHandling.errorRecord(errorSchema, row, e));
+      }
+    }
+  }
+
+  private static @Nullable Object convertToBsonValue(@Nullable Object value) {
+    if (value == null) {
+      return null;
+    }
+    if (value instanceof Row) {
+      Row row = (Row) value;
+      Document doc = new Document();
+      for (Field field : row.getSchema().getFields()) {
+        Object fieldValue = row.getValue(field.getName());
+        Object convertedValue = convertToBsonValue(fieldValue);
+        if (convertedValue != null) {
+          doc.append(field.getName(), convertedValue);
+        }
+      }
+      return doc;
+    } else if (value instanceof List) {
+      List<?> list = (List<?>) value;
+      List<Object> bsonList = new ArrayList<>(list.size());
+      for (Object item : list) {
+        Object convertedItem = convertToBsonValue(item);
+        if (convertedItem != null) {
+          bsonList.add(convertedItem);
+        }
+      }
+      return bsonList;
+    } else if (value instanceof Iterable) {
+      List<Object> bsonList = new ArrayList<>();
+      for (Object item : (Iterable<?>) value) {
+        Object convertedItem = convertToBsonValue(item);
+        if (convertedItem != null) {
+          bsonList.add(convertedItem);
+        }
+      }
+      return bsonList;
+    } else if (value instanceof Map) {
+      Map<?, ?> map = (Map<?, ?>) value;
+      Document doc = new Document();
+      for (Map.Entry<?, ?> entry : map.entrySet()) {
+        Object convertedValue = convertToBsonValue(entry.getValue());
+        if (convertedValue != null) {
+          doc.append(String.valueOf(entry.getKey()), convertedValue);
+        }
+      }
+      return doc;
+    }
+    return value;
+  }
+}