diqiu50 commented on code in PR #11186: URL: https://github.com/apache/gravitino/pull/11186#discussion_r3311229486
########## spark-connector/spark-common/src/main/java/org/apache/gravitino/spark/connector/glue/GravitinoGlueCatalog.java: ########## @@ -0,0 +1,350 @@ +/* + * 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.gravitino.spark.connector.glue; + +import com.google.common.base.Preconditions; +import java.util.Arrays; +import java.util.Collections; +import java.util.HashMap; +import java.util.Map; +import org.apache.gravitino.catalog.glue.GlueConstants; +import org.apache.gravitino.spark.connector.PropertiesConverter; +import org.apache.gravitino.spark.connector.SparkTransformConverter; +import org.apache.gravitino.spark.connector.SparkTypeConverter; +import org.apache.gravitino.spark.connector.catalog.BaseCatalog; +import org.apache.gravitino.spark.connector.hive.SparkHiveTable; +import org.apache.gravitino.spark.connector.hive.SparkHiveTypeConverter; +import org.apache.gravitino.spark.connector.iceberg.SparkIcebergTable; +import org.apache.iceberg.spark.SparkCatalog; +import org.apache.iceberg.spark.source.SparkTable; +import org.apache.kyuubi.spark.connector.hive.HiveTable; +import org.apache.kyuubi.spark.connector.hive.HiveTableCatalog; +import org.apache.spark.sql.catalyst.analysis.NamespaceAlreadyExistsException; +import org.apache.spark.sql.catalyst.analysis.NoSuchNamespaceException; +import org.apache.spark.sql.catalyst.analysis.NoSuchTableException; +import org.apache.spark.sql.catalyst.analysis.TableAlreadyExistsException; +import org.apache.spark.sql.connector.catalog.Identifier; +import org.apache.spark.sql.connector.catalog.SupportsNamespaces; +import org.apache.spark.sql.connector.catalog.Table; +import org.apache.spark.sql.connector.catalog.TableCatalog; +import org.apache.spark.sql.connector.expressions.Transform; +import org.apache.spark.sql.types.DataTypes; +import org.apache.spark.sql.types.StructField; +import org.apache.spark.sql.types.StructType; +import org.apache.spark.sql.util.CaseInsensitiveStringMap; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * Gravitino Glue catalog implementation for Apache Spark. + * + * <p>This catalog handles mixed table types stored in AWS Glue Data Catalog: + * + * <ul> + * <li>Non-Iceberg tables (Hive, Delta, Parquet): routed to HiveTableCatalog for I/O + * <li>Iceberg tables: routed to Iceberg's GlueCatalog for I/O + * </ul> + * + * <p>Table routing is based on the {@code table-format} property in Glue table parameters. Tables + * with {@code table-format=ICEBERG} are delegated to the Iceberg backend. + * + * <p>Derby sync: Gravitino creates/modifies tables in AWS Glue. HiveTableCatalog (used as + * sparkCatalog) uses an embedded Derby metastore for metadata validation. We must keep Derby in + * sync with Glue for loadSparkTable() to succeed. Derby is populated lazily on createTable() and + * loadTable(), and cleaned up on dropTable()/purgeTable()/renameTable(). + */ +public class GravitinoGlueCatalog extends BaseCatalog { + + private static final Logger LOG = LoggerFactory.getLogger(GravitinoGlueCatalog.class); + + // Lazily initialized Iceberg GlueCatalog for Iceberg tables + private volatile SparkCatalog icebergGlueCatalog; + + // Store original config for Iceberg catalog initialization + private String catalogName; + private Map<String, String> catalogProperties; + + /** Creates a new GravitinoGlueCatalog. */ + public GravitinoGlueCatalog() {} + + /** + * Creates a new HiveTableCatalog instance. Override in tests to inject mock instances. + * + * @return a new HiveTableCatalog + */ + protected HiveTableCatalog createHiveTableCatalog() { + return new HiveTableCatalog(); + } + + @Override + protected TableCatalog createAndInitSparkCatalog( + String name, CaseInsensitiveStringMap options, Map<String, String> properties) { + this.catalogName = name; + this.catalogProperties = properties; + + TableCatalog hiveCatalog = createHiveTableCatalog(); + Map<String, String> all = + getPropertiesConverter().toSparkCatalogProperties(options, properties); + hiveCatalog.initialize(name, new CaseInsensitiveStringMap(all)); + return hiveCatalog; + } + + /** + * Routes Spark table loading to the correct backend after Gravitino creates the table. + * + * <p>Iceberg tables are loaded from the Iceberg GlueCatalog; they are never registered in Derby. + * Hive tables are loaded from Derby, syncing from Glue first if the entry is missing. + */ + @Override + protected Table loadSparkTable(Identifier ident) { + try { + org.apache.gravitino.rel.Table gravitinoTable = loadGravitinoTable(ident); + if (isIcebergTable(gravitinoTable)) { + return loadIcebergSparkTable(ident, getOrCreateIcebergGlueCatalog()); + } + syncNamespaceToDerby(ident.namespace()); Review Comment: Spark Hive tables cannot retrieve metadata using the AWS Glue SDK, so we synchronize the metadata retrieved by Gravitino from Glue into Derby to make it accessible for Spark. -- This is an automated message from the Apache Git Service. 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