[GitHub] [beam] DariuszAniszewski commented on a change in pull request #11360: [WIP][BEAM-9722] added SnowflakeIO with Read operation

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DariuszAniszewski commented on a change in pull request #11360: [WIP][BEAM-9722] added SnowflakeIO with Read operation
URL: https://github.com/apache/beam/pull/11360#discussion_r406786410
 
 

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 File path: sdks/java/io/snowflake/src/main/java/org/apache/beam/sdk/io/snowflake/SnowflakeIO.java
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+/*
+ * 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.snowflake;
+
+import static org.apache.beam.sdk.io.TextIO.readFiles;
+import static org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Preconditions.checkArgument;
+
+import com.google.auto.value.AutoValue;
+import com.opencsv.CSVParser;
+import com.opencsv.CSVParserBuilder;
+import java.io.IOException;
+import java.io.Serializable;
+import java.security.PrivateKey;
+import java.sql.Connection;
+import java.sql.SQLException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
+import javax.annotation.Nullable;
+import javax.sql.DataSource;
+import net.snowflake.client.jdbc.SnowflakeBasicDataSource;
+import org.apache.beam.sdk.coders.Coder;
+import org.apache.beam.sdk.io.FileIO;
+import org.apache.beam.sdk.io.snowflake.credentials.KeyPairSnowflakeCredentials;
+import org.apache.beam.sdk.io.snowflake.credentials.OAuthTokenSnowflakeCredentials;
+import org.apache.beam.sdk.io.snowflake.credentials.SnowflakeCredentials;
+import org.apache.beam.sdk.io.snowflake.credentials.UsernamePasswordSnowflakeCredentials;
+import org.apache.beam.sdk.options.ValueProvider;
+import org.apache.beam.sdk.transforms.Create;
+import org.apache.beam.sdk.transforms.DoFn;
+import org.apache.beam.sdk.transforms.PTransform;
+import org.apache.beam.sdk.transforms.ParDo;
+import org.apache.beam.sdk.transforms.SerializableFunction;
+import org.apache.beam.sdk.transforms.Wait;
+import org.apache.beam.sdk.transforms.display.DisplayData;
+import org.apache.beam.sdk.transforms.display.HasDisplayData;
+import org.apache.beam.sdk.values.PBegin;
+import org.apache.beam.sdk.values.PCollection;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * IO to read and write data on Snowflake.
+ *
+ * <p>SnowflakeIO uses <a href="https://docs.snowflake.net/manuals/user-guide/jdbc.html">Snowflake
+ * JDBC</a> driver under the hood, but data isn't read/written using JDBC directly. Instead,
+ * SnowflakeIO uses dedicated <b>COPY</b> operations to read/write data from/to Google Cloud
+ * Storage.
+ *
+ * <p>To configure SnowflakeIO to read/write from your Snowflake instance, you have to provide a
+ * {@link DataSourceConfiguration} using {@link
+ * DataSourceConfiguration#create(SnowflakeCredentials)}, where {@link SnowflakeCredentials might be
+ * created using {@link org.apache.beam.sdk.io.snowflake.credentials.SnowflakeCredentialsFactory}}.
+ * Additionally one of {@link DataSourceConfiguration#withServerName(String)} or {@link
+ * DataSourceConfiguration#withUrl(String)} must be used to tell SnowflakeIO which instance to use.
+ * <br>
+ * There are also other options available to configure connection to Snowflake:
+ *
+ * <ul>
+ *   <li>{@link DataSourceConfiguration#withWarehouse(String)} to specify which Warehouse to use
+ *   <li>{@link DataSourceConfiguration#withDatabase(String)} to specify which Database to connect
+ *       to
+ *   <li>{@link DataSourceConfiguration#withSchema(String)} to specify which schema to use
+ *   <li>{@link DataSourceConfiguration#withRole(String)} to specify which role to use
+ *   <li>{@link DataSourceConfiguration#withPortNumber(int)} to specify custom port of Snowflake
+ *       instance
+ * </ul>
+ *
+ * <p>For example:
+ *
+ * <pre>{@code
+ * SnowflakeIO.DataSourceConfiguration dataSourceConfiguration =
+ *     SnowflakeIO.DataSourceConfiguration.create(SnowflakeCredentialsFactory.of(options))
+ *         .withServerName(options.getServerName())
+ *         .withWarehouse(options.getWarehouse())
+ *         .withDatabase(options.getDatabase())
+ *         .withSchema(options.getSchema);
 
 Review comment:
   thanks!

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