rdblue commented on a change in pull request #1759: URL: https://github.com/apache/iceberg/pull/1759#discussion_r523162428
########## File path: spark3/src/main/java/org/apache/iceberg/spark/procedures/BaseProcedure.java ########## @@ -0,0 +1,123 @@ +/* + * 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.iceberg.spark.procedures; + +import java.util.function.Function; +import org.apache.iceberg.exceptions.ValidationException; +import org.apache.iceberg.relocated.com.google.common.base.Preconditions; +import org.apache.iceberg.spark.procedures.SparkProcedures.ProcedureBuilder; +import org.apache.iceberg.spark.source.SparkTable; +import org.apache.spark.sql.SparkSession; +import org.apache.spark.sql.catalyst.analysis.NoSuchTableException; +import org.apache.spark.sql.catalyst.parser.ParseException; +import org.apache.spark.sql.catalyst.parser.ParserInterface; +import org.apache.spark.sql.connector.catalog.Identifier; +import org.apache.spark.sql.connector.catalog.Table; +import org.apache.spark.sql.connector.catalog.TableCatalog; +import org.apache.spark.sql.connector.iceberg.catalog.Procedure; +import org.apache.spark.sql.execution.CacheManager; +import org.apache.spark.sql.execution.datasources.v2.DataSourceV2Relation; +import scala.Option; +import scala.collection.Seq; + +abstract class BaseProcedure implements Procedure { + private final SparkSession spark; + private final TableCatalog tableCatalog; + + protected BaseProcedure(TableCatalog tableCatalog) { + this.spark = SparkSession.active(); + this.tableCatalog = tableCatalog; + } + + protected <T> T modifyIcebergTable(String namespace, String tableName, Function<org.apache.iceberg.Table, T> func) { + Preconditions.checkArgument(namespace != null && !namespace.isEmpty(), "Namespace cannot be empty"); + Preconditions.checkArgument(tableName != null && !tableName.isEmpty(), "Table name cannot be empty"); + + Identifier ident = toIdentifier(namespace, tableName); + SparkTable sparkTable = loadSparkTable(ident); + org.apache.iceberg.Table icebergTable = sparkTable.table(); + + T result = func.apply(icebergTable); + + refreshSparkCache(ident, sparkTable); + + return result; + } + + // we have to parse both namespace and name as they may be quoted + protected Identifier toIdentifier(String namespaceAsString, String name) { + String[] namespaceParts = parseMultipartIdentifier(namespaceAsString); + + String[] nameParts = parseMultipartIdentifier(name); + Preconditions.checkArgument(nameParts.length == 1, "Name must consist of one part: %s", name); + + return Identifier.of(namespaceParts, nameParts[0]); + } + + private String[] parseMultipartIdentifier(String identifierAsString) { + try { + ParserInterface parser = spark.sessionState().sqlParser(); + Seq<String> namePartsSeq = parser.parseMultipartIdentifier(identifierAsString); + String[] nameParts = new String[namePartsSeq.size()]; + namePartsSeq.copyToArray(nameParts); + return nameParts; + } catch (ParseException e) { + throw new RuntimeException("Couldn't parse identifier: " + identifierAsString, e); + } + } + + protected SparkTable loadSparkTable(Identifier ident) { + try { + Table table = tableCatalog.loadTable(ident); + ValidationException.check(table instanceof SparkTable, "%s is not %s", ident, SparkTable.class.getName()); + return (SparkTable) table; + } catch (NoSuchTableException e) { + String errMsg = String.format("Couldn't load table '%s' in catalog '%s'", ident, tableCatalog.name()); + throw new RuntimeException(errMsg, e); + } + } + + protected void refreshSparkCache(Identifier ident, Table table) { + CacheManager cacheManager = spark.sharedState().cacheManager(); + DataSourceV2Relation relation = DataSourceV2Relation.create(table, Option.apply(tableCatalog), Option.apply(ident)); + cacheManager.recacheByPlan(spark, relation); + } + + protected abstract static class Builder<T extends BaseProcedure> implements ProcedureBuilder { + private TableCatalog tableCatalog; + + @Override + public Builder<T> withTableCatalog(TableCatalog newTableCatalog) { + this.tableCatalog = newTableCatalog; + return this; + } + + @Override + public T build() { + return doBuild(); + } Review comment: Why not make `build` abstract? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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