deniskuzZ commented on code in PR #5786: URL: https://github.com/apache/hive/pull/5786#discussion_r2079713216
########## iceberg/iceberg-handler/src/main/java/org/apache/iceberg/mr/hive/metastore/task/IcebergHouseKeeperService.java: ########## @@ -0,0 +1,131 @@ +/* + * 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 + * <p> + * http://www.apache.org/licenses/LICENSE-2.0 + * <p> + * 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.mr.hive.metastore.task; + +import java.util.List; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.TimeUnit; +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.hive.common.TableName; +import org.apache.hadoop.hive.conf.HiveConf; +import org.apache.hadoop.hive.metastore.HiveMetaStoreClient; +import org.apache.hadoop.hive.metastore.IMetaStoreClient; +import org.apache.hadoop.hive.metastore.MetastoreTaskThread; +import org.apache.hadoop.hive.metastore.api.GetTableRequest; +import org.apache.hadoop.hive.metastore.api.hive_metastoreConstants; +import org.apache.hadoop.hive.metastore.conf.MetastoreConf; +import org.apache.hadoop.hive.metastore.utils.TableFetcher; +import org.apache.iceberg.ExpireSnapshots; +import org.apache.iceberg.Table; +import org.apache.iceberg.mr.hive.HiveIcebergUtil; +import org.apache.iceberg.mr.hive.IcebergTableUtil; +import org.apache.iceberg.relocated.com.google.common.annotations.VisibleForTesting; +import org.apache.thrift.TException; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public class IcebergHouseKeeperService implements MetastoreTaskThread { + private static final Logger LOG = LoggerFactory.getLogger(IcebergHouseKeeperService.class); + + private Configuration conf; + + @Override + public long runFrequency(TimeUnit unit) { + return MetastoreConf.getTimeVar(conf, MetastoreConf.ConfVars.ICEBERG_TABLE_EXPIRY_INTERVAL, unit); + } + + @Override + public void run() { + LOG.debug("Running IcebergHouseKeeperService..."); + + String catalogName = MetastoreConf.getVar(conf, MetastoreConf.ConfVars.ICEBERG_TABLE_EXPIRY_CATALOG_NAME); + String dbPattern = MetastoreConf.getVar(conf, MetastoreConf.ConfVars.ICEBERG_TABLE_EXPIRY_DATABASE_PATTERN); + String tablePattern = MetastoreConf.getVar(conf, MetastoreConf.ConfVars.ICEBERG_TABLE_EXPIRY_TABLE_PATTERN); + + try (IMetaStoreClient msc = new HiveMetaStoreClient(conf)) { + // TODO: Future improvement – modify TableFetcher to return HMS Table API objects directly, + // avoiding the need for subsequent msc.getTable calls to fetch each matched table individually + List<TableName> tables = getTableFetcher(msc, catalogName, dbPattern, tablePattern).getTables(); + + LOG.debug("{} candidate tables found", tables.size()); + + for (TableName table : tables) { + expireSnapshotsForTable(getIcebergTable(table, msc)); + } + } catch (Exception e) { + LOG.error("Exception while running iceberg expiry service on catalog/db/table: {}/{}/{}", catalogName, dbPattern, + tablePattern, e); + } + } + + @VisibleForTesting + TableFetcher getTableFetcher(IMetaStoreClient msc, String catalogName, String dbPattern, String tablePattern) { + return new TableFetcher.Builder(msc, catalogName, dbPattern, tablePattern).tableTypes( + "EXTERNAL_TABLE") + .tableCondition( + hive_metastoreConstants.HIVE_FILTER_FIELD_PARAMS + "table_type like \"ICEBERG\" ") + .build(); + } + + private Table getIcebergTable(TableName table, IMetaStoreClient msc) throws TException { + GetTableRequest request = new GetTableRequest(table.getDb(), table.getTable()); + return IcebergTableUtil.getTable(conf, msc.getTable(request)); + } + + /** + * Deletes snapshots of an Iceberg table, using the number of threads defined by the + * Hive config HIVE_ICEBERG_EXPIRE_SNAPSHOT_NUMTHREADS. + * This is largely equivalent to the HiveIcebergStorageHandler.expireSnapshotWithDefaultParams method. + * + * @param icebergTable the iceberg Table reference + */ + private void expireSnapshotsForTable(Table icebergTable) { + LOG.info("Expire snapshots for: {}", icebergTable); Review Comment: does that print fully-qualified table name? -- This is an automated message from the Apache Git Service. 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