sclukas77 commented on a change in pull request #12498: URL: https://github.com/apache/beam/pull/12498#discussion_r470865279
########## File path: sdks/java/io/jdbc/src/main/java/org/apache/beam/sdk/io/jdbc/JdbcSchemaIOProvider.java ########## @@ -0,0 +1,172 @@ +/* + * 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.jdbc; + +import com.google.auto.service.AutoService; +import java.io.Serializable; +import java.util.List; +import java.util.stream.Collectors; +import java.util.stream.StreamSupport; +import javax.annotation.Nullable; +import org.apache.beam.sdk.annotations.Internal; +import org.apache.beam.sdk.schemas.Schema; +import org.apache.beam.sdk.schemas.Schema.FieldType; +import org.apache.beam.sdk.schemas.io.SchemaIO; +import org.apache.beam.sdk.schemas.io.SchemaIOProvider; +import org.apache.beam.sdk.transforms.PTransform; +import org.apache.beam.sdk.values.PBegin; +import org.apache.beam.sdk.values.PCollection; +import org.apache.beam.sdk.values.PDone; +import org.apache.beam.sdk.values.Row; + +/** + * An implementation of {@link SchemaIOProvider} for reading and writing JSON payloads with {@link + * JdbcIO}. + */ +@Internal +@AutoService(SchemaIOProvider.class) +public class JdbcSchemaIOProvider implements SchemaIOProvider { + + /** Returns an id that uniquely represents this IO. */ + @Override + public String identifier() { + return "jdbc"; + } + + /** + * Returns the expected schema of the configuration object. Note this is distinct from the schema + * of the data source itself. + */ + @Override + public Schema configurationSchema() { + return Schema.builder() + .addStringField("driverClassName") + .addStringField("jdbcUrl") + .addStringField("username") + .addStringField("password") + .addNullableField("connectionProperties", FieldType.STRING) + .addNullableField("connectionInitSqls", FieldType.iterable(FieldType.STRING)) + .addNullableField("readQuery", FieldType.STRING) + .addNullableField("writeStatement", FieldType.STRING) + .addNullableField("fetchSize", FieldType.INT16) + .addNullableField("outputParallelization", FieldType.BOOLEAN) + .build(); + } + + /** + * Produce a SchemaIO given a String representing the data's location, the schema of the data that + * resides there, and some IO-specific configuration object. + */ + @Override + public JdbcSchemaIO from(String location, Row configuration, Schema dataSchema) { + return new JdbcSchemaIO(location, configuration); + } + + @Override + public boolean requiresDataSchema() { + return false; + } + + @Override + public PCollection.IsBounded isBounded() { + return PCollection.IsBounded.BOUNDED; + } + + /** An abstraction to create schema aware IOs. */ + static class JdbcSchemaIO implements SchemaIO, Serializable { + protected final Row config; + protected final String location; + + JdbcSchemaIO(String location, Row config) { + this.config = config; + this.location = location; + } + + @Override + public Schema schema() { + return null; + } + + @Override + public PTransform<PBegin, PCollection<Row>> buildReader() { + String readQuery; + if (config.getString("readQuery") != null) { + readQuery = config.getString("readQuery"); + } else { + readQuery = String.format("SELECT f_int FROM %s", location); + } + + JdbcIO.DataSourceConfiguration dataSourceConfiguration = getDataSourceConfiguration(); + + JdbcIO.ReadRows readRows = + JdbcIO.readRows() + .withDataSourceConfiguration(dataSourceConfiguration) + .withQuery(readQuery); + + if (config.getInt16("fetchSize") != null) { + readRows = readRows.withFetchSize(config.getInt16("fetchSize")); + } + if (config.getBoolean("outputParallelization") != null) { + readRows = readRows.withOutputParallelization(config.getBoolean("outputParallelization")); + } + return readRows; + } + + @Override + public PTransform<PCollection<Row>, PDone> buildWriter() { + String writeStatement; + if (config.getString("writeStatement") != null) { + writeStatement = config.getString("writeStatement"); + } else { + writeStatement = String.format("INSERT INTO %s VALUES(?, ?, ?)", location); Review comment: Done. ########## File path: sdks/java/io/jdbc/src/main/java/org/apache/beam/sdk/io/jdbc/JdbcSchemaIOProvider.java ########## @@ -0,0 +1,172 @@ +/* + * 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.jdbc; + +import com.google.auto.service.AutoService; +import java.io.Serializable; +import java.util.List; +import java.util.stream.Collectors; +import java.util.stream.StreamSupport; +import javax.annotation.Nullable; +import org.apache.beam.sdk.annotations.Internal; +import org.apache.beam.sdk.schemas.Schema; +import org.apache.beam.sdk.schemas.Schema.FieldType; +import org.apache.beam.sdk.schemas.io.SchemaIO; +import org.apache.beam.sdk.schemas.io.SchemaIOProvider; +import org.apache.beam.sdk.transforms.PTransform; +import org.apache.beam.sdk.values.PBegin; +import org.apache.beam.sdk.values.PCollection; +import org.apache.beam.sdk.values.PDone; +import org.apache.beam.sdk.values.Row; + +/** + * An implementation of {@link SchemaIOProvider} for reading and writing JSON payloads with {@link + * JdbcIO}. + */ +@Internal +@AutoService(SchemaIOProvider.class) +public class JdbcSchemaIOProvider implements SchemaIOProvider { + + /** Returns an id that uniquely represents this IO. */ + @Override + public String identifier() { + return "jdbc"; + } + + /** + * Returns the expected schema of the configuration object. Note this is distinct from the schema + * of the data source itself. + */ + @Override + public Schema configurationSchema() { + return Schema.builder() + .addStringField("driverClassName") + .addStringField("jdbcUrl") + .addStringField("username") + .addStringField("password") + .addNullableField("connectionProperties", FieldType.STRING) + .addNullableField("connectionInitSqls", FieldType.iterable(FieldType.STRING)) + .addNullableField("readQuery", FieldType.STRING) + .addNullableField("writeStatement", FieldType.STRING) + .addNullableField("fetchSize", FieldType.INT16) + .addNullableField("outputParallelization", FieldType.BOOLEAN) + .build(); + } + + /** + * Produce a SchemaIO given a String representing the data's location, the schema of the data that + * resides there, and some IO-specific configuration object. + */ + @Override + public JdbcSchemaIO from(String location, Row configuration, Schema dataSchema) { + return new JdbcSchemaIO(location, configuration); + } + + @Override + public boolean requiresDataSchema() { + return false; + } + + @Override + public PCollection.IsBounded isBounded() { + return PCollection.IsBounded.BOUNDED; + } + + /** An abstraction to create schema aware IOs. */ + static class JdbcSchemaIO implements SchemaIO, Serializable { + protected final Row config; + protected final String location; + + JdbcSchemaIO(String location, Row config) { + this.config = config; + this.location = location; + } + + @Override + public Schema schema() { + return null; + } + + @Override + public PTransform<PBegin, PCollection<Row>> buildReader() { + String readQuery; + if (config.getString("readQuery") != null) { + readQuery = config.getString("readQuery"); + } else { + readQuery = String.format("SELECT f_int FROM %s", location); Review comment: Done. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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