[120] | 1 | /** |
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
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| 3 | * or more contributor license agreements. See the NOTICE file |
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| 4 | * distributed with this work for additional information |
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| 5 | * regarding copyright ownership. The ASF licenses this file |
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| 6 | * to you under the Apache License, Version 2.0 (the |
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| 7 | * "License"); you may not use this file except in compliance |
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| 8 | * with the License. You may obtain a copy of the License at |
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| 9 | * |
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| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 11 | * |
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| 12 | * Unless required by applicable law or agreed to in writing, software |
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| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 15 | * See the License for the specific language governing permissions and |
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| 16 | * limitations under the License. |
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| 17 | */ |
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| 18 | |
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| 19 | package org.apache.hadoop.fs.s3; |
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| 20 | |
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| 21 | import java.io.File; |
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| 22 | import java.io.IOException; |
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| 23 | import java.net.URI; |
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| 24 | import java.util.Set; |
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| 25 | |
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| 26 | import org.apache.hadoop.conf.Configuration; |
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| 27 | import org.apache.hadoop.fs.Path; |
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| 28 | |
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| 29 | /** |
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| 30 | * A facility for storing and retrieving {@link INode}s and {@link Block}s. |
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| 31 | */ |
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| 32 | public interface FileSystemStore { |
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| 33 | |
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| 34 | void initialize(URI uri, Configuration conf) throws IOException; |
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| 35 | String getVersion() throws IOException; |
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| 36 | |
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| 37 | void storeINode(Path path, INode inode) throws IOException; |
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| 38 | void storeBlock(Block block, File file) throws IOException; |
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| 39 | |
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| 40 | boolean inodeExists(Path path) throws IOException; |
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| 41 | boolean blockExists(long blockId) throws IOException; |
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| 42 | |
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| 43 | INode retrieveINode(Path path) throws IOException; |
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| 44 | File retrieveBlock(Block block, long byteRangeStart) throws IOException; |
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| 45 | |
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| 46 | void deleteINode(Path path) throws IOException; |
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| 47 | void deleteBlock(Block block) throws IOException; |
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| 48 | |
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| 49 | Set<Path> listSubPaths(Path path) throws IOException; |
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| 50 | Set<Path> listDeepSubPaths(Path path) throws IOException; |
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| 51 | |
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| 52 | /** |
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| 53 | * Delete everything. Used for testing. |
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| 54 | * @throws IOException |
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| 55 | */ |
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| 56 | void purge() throws IOException; |
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| 57 | |
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| 58 | /** |
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| 59 | * Diagnostic method to dump all INodes to the console. |
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| 60 | * @throws IOException |
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| 61 | */ |
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| 62 | void dump() throws IOException; |
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| 63 | } |
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