NativeFileSystemStore.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.s3native;
- import java.io.File;
- import java.io.IOException;
- import java.io.InputStream;
- import java.net.URI;
- import org.apache.hadoop.conf.Configuration;
- /**
- * <p>
- * An abstraction for a key-based {@link File} store.
- * </p>
- */
- interface NativeFileSystemStore {
-
- void initialize(URI uri, Configuration conf) throws IOException;
-
- void storeFile(String key, File file, byte[] md5Hash) throws IOException;
- void storeEmptyFile(String key) throws IOException;
-
- FileMetadata retrieveMetadata(String key) throws IOException;
- InputStream retrieve(String key) throws IOException;
- InputStream retrieve(String key, long byteRangeStart) throws IOException;
-
- PartialListing list(String prefix, int maxListingLength) throws IOException;
- PartialListing list(String prefix, int maxListingLength, String priorLastKey)
- throws IOException;
- PartialListing listAll(String prefix, int maxListingLength,
- String priorLastKey) throws IOException;
-
- void delete(String key) throws IOException;
- void rename(String srcKey, String dstKey) throws IOException;
-
- /**
- * Delete all keys with the given prefix. Used for testing.
- * @throws IOException
- */
- void purge(String prefix) throws IOException;
-
- /**
- * Diagnostic method to dump state to the console.
- * @throws IOException
- */
- void dump() throws IOException;
- }