deniskuzZ commented on code in PR #4032: URL: https://github.com/apache/hive/pull/4032#discussion_r1118379026
########## ql/src/java/org/apache/hadoop/hive/ql/txn/compactor/handler/CompactionHandler.java: ########## @@ -0,0 +1,392 @@ +/* + * 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.hadoop.hive.ql.txn.compactor.handler; + +import org.apache.hadoop.fs.FileSystem; +import org.apache.hadoop.fs.Path; +import org.apache.hadoop.hive.common.ValidReadTxnList; +import org.apache.hadoop.hive.common.ValidReaderWriteIdList; +import org.apache.hadoop.hive.common.ValidTxnList; +import org.apache.hadoop.hive.conf.HiveConf; +import org.apache.hadoop.hive.metastore.LockComponentBuilder; +import org.apache.hadoop.hive.metastore.LockRequestBuilder; +import org.apache.hadoop.hive.metastore.api.DataOperationType; +import org.apache.hadoop.hive.metastore.api.GetValidWriteIdsRequest; +import org.apache.hadoop.hive.metastore.api.GetValidWriteIdsResponse; +import org.apache.hadoop.hive.metastore.api.LockRequest; +import org.apache.hadoop.hive.metastore.api.LockResponse; +import org.apache.hadoop.hive.metastore.api.LockType; +import org.apache.hadoop.hive.metastore.api.MetaException; +import org.apache.hadoop.hive.metastore.api.NoSuchLockException; +import org.apache.hadoop.hive.metastore.api.NoSuchTxnException; +import org.apache.hadoop.hive.metastore.api.Partition; +import org.apache.hadoop.hive.metastore.api.Table; +import org.apache.hadoop.hive.metastore.api.TxnAbortedException; +import org.apache.hadoop.hive.metastore.api.TxnOpenException; +import org.apache.hadoop.hive.metastore.api.UnlockRequest; +import org.apache.hadoop.hive.metastore.metrics.AcidMetricService; +import org.apache.hadoop.hive.metastore.metrics.Metrics; +import org.apache.hadoop.hive.metastore.metrics.MetricsConstants; +import org.apache.hadoop.hive.metastore.metrics.PerfLogger; +import org.apache.hadoop.hive.metastore.txn.CompactionInfo; +import org.apache.hadoop.hive.metastore.txn.TxnCommonUtils; +import org.apache.hadoop.hive.metastore.txn.TxnStore; +import org.apache.hadoop.hive.metastore.txn.TxnUtils; +import org.apache.hadoop.hive.metastore.utils.MetaStoreUtils; +import org.apache.hadoop.hive.ql.io.AcidDirectory; +import org.apache.hadoop.hive.ql.io.AcidUtils; +import org.apache.hadoop.hive.ql.txn.compactor.CacheContainer; +import org.apache.hadoop.hive.ql.txn.compactor.CleaningRequest; +import org.apache.hadoop.hive.ql.txn.compactor.CleaningRequest.CleaningRequestBuilder; +import org.apache.hadoop.hive.ql.txn.compactor.CompactorUtil; +import org.apache.hadoop.hive.ql.txn.compactor.CompactorUtil.ThrowingRunnable; +import org.apache.hadoop.hive.ql.txn.compactor.FSRemover; +import org.apache.hive.common.util.Ref; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.util.BitSet; +import java.util.Collections; +import java.util.List; +import java.util.Map; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.TimeUnit; +import java.util.stream.Collectors; + +import static org.apache.commons.collections4.ListUtils.subtract; +import static org.apache.hadoop.hive.conf.HiveConf.ConfVars.HIVE_COMPACTOR_CLEANER_RETENTION_TIME; +import static org.apache.hadoop.hive.conf.HiveConf.ConfVars.HIVE_COMPACTOR_DELAYED_CLEANUP_ENABLED; +import static org.apache.hadoop.hive.metastore.conf.MetastoreConf.ConfVars.HIVE_COMPACTOR_CLEANER_MAX_RETRY_ATTEMPTS; +import static org.apache.hadoop.hive.metastore.conf.MetastoreConf.ConfVars.HIVE_COMPACTOR_CLEANER_RETRY_RETENTION_TIME; +import static org.apache.hadoop.hive.metastore.conf.MetastoreConf.getIntVar; +import static org.apache.hadoop.hive.metastore.conf.MetastoreConf.getTimeVar; +import static java.util.Objects.isNull; + +/** + * A compaction based implementation of RequestHandler. + * Provides implementation of finding ready to clean items, preprocessing of cleaning request, + * postprocessing of cleaning request and failure handling of cleaning request. + */ +class CompactionHandler extends RequestHandler { Review Comment: i think it should be either under the cleaner package or have `Cleaner` in the class name -- This is an automated message from the Apache Git Service. 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