| /* |
| * 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.drill.exec.store.dfs; |
| |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.drill.shaded.guava.com.google.common.collect.Maps; |
| import org.apache.hadoop.fs.Path; |
| |
| /** |
| * A metadata context that holds state across multiple invocations of |
| * the Parquet metadata APIs. |
| */ |
| public class MetadataContext { |
| |
| /** |
| * Map of directory path to the status of whether modification time was already checked. |
| * Note: the #directories is typically a small percentage of the #files, so the memory footprint |
| * is expected to be relatively small. |
| */ |
| private Map<Path, Boolean> dirModifCheckMap = Maps.newHashMap(); |
| |
| private PruneStatus pruneStatus = PruneStatus.NOT_STARTED; |
| |
| private boolean metadataCacheCorrupted; |
| |
| private List<Path> directories; |
| |
| public void setStatus(Path dir) { |
| dirModifCheckMap.put(dir, true); |
| } |
| |
| public void clearStatus(Path dir) { |
| dirModifCheckMap.put(dir, false); |
| } |
| |
| public boolean getStatus(String dir) { |
| if (dirModifCheckMap.containsKey(dir)) { |
| return dirModifCheckMap.get(dir); |
| } |
| return false; |
| } |
| |
| public void clear() { |
| dirModifCheckMap.clear(); |
| metadataCacheCorrupted = false; |
| } |
| |
| public void setPruneStatus(PruneStatus status) { |
| pruneStatus = status; |
| } |
| |
| public PruneStatus getPruneStatus() { |
| return pruneStatus; |
| } |
| |
| /** |
| * @return true if parquet metadata cache files are missing or corrupted, false otherwise |
| */ |
| public boolean isMetadataCacheCorrupted() { |
| return metadataCacheCorrupted; |
| } |
| |
| /** |
| * Setting this as true allows to avoid double reading of corrupted, unsupported or missing metadata files |
| * |
| * @param metadataCacheCorrupted metadata corruption status |
| */ |
| public void setMetadataCacheCorrupted(boolean metadataCacheCorrupted) { |
| this.metadataCacheCorrupted = metadataCacheCorrupted; |
| } |
| |
| public void setDirectories(List<Path> directories) { |
| this.directories = directories; |
| } |
| |
| public List<Path> getDirectories() { |
| return directories; |
| } |
| |
| public enum PruneStatus { |
| NOT_STARTED, // initial state |
| PRUNED, // partitions were pruned |
| NOT_PRUNED // partitions did not get pruned |
| } |
| |
| } |
| |
| |