FileSystemStore.java
上传用户:quxuerui
上传日期:2018-01-08
资源大小:41811k
文件大小:2k
- /**
- * 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.fs.s3;
- import java.io.File;
- import java.io.IOException;
- import java.net.URI;
- import java.util.Set;
- import org.apache.hadoop.conf.Configuration;
- import org.apache.hadoop.fs.Path;
- /**
- * A facility for storing and retrieving {@link INode}s and {@link Block}s.
- */
- public interface FileSystemStore {
-
- void initialize(URI uri, Configuration conf) throws IOException;
- String getVersion() throws IOException;
- void storeINode(Path path, INode inode) throws IOException;
- void storeBlock(Block block, File file) throws IOException;
-
- boolean inodeExists(Path path) throws IOException;
- boolean blockExists(long blockId) throws IOException;
- INode retrieveINode(Path path) throws IOException;
- File retrieveBlock(Block block, long byteRangeStart) throws IOException;
- void deleteINode(Path path) throws IOException;
- void deleteBlock(Block block) throws IOException;
- Set<Path> listSubPaths(Path path) throws IOException;
- Set<Path> listDeepSubPaths(Path path) throws IOException;
- /**
- * Delete everything. Used for testing.
- * @throws IOException
- */
- void purge() throws IOException;
-
- /**
- * Diagnostic method to dump all INodes to the console.
- * @throws IOException
- */
- void dump() throws IOException;
- }