hadoop Seekable 源码

  • 2022-10-20
  • 浏览 (514)

haddop Seekable 代码

文件路径:/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/Seekable.java

/**
 * 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;

import java.io.*;

import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;

/**
 *  Stream that permits seeking.
 */
@InterfaceAudience.Public
@InterfaceStability.Evolving
public interface Seekable {
  /**
   * Seek to the given offset from the start of the file.
   * The next read() will be from that location.  Can't
   * seek past the end of the file.
   *
   * @param pos offset from the start of the file.
   * @throws IOException raised on errors performing I/O.
   */
  void seek(long pos) throws IOException;

  /**
   * Return the current offset from the start of the file
   *
   * @return offset from the start of the file.
   * @throws IOException raised on errors performing I/O.
   */
  long getPos() throws IOException;

  /**
   * Seeks a different copy of the data.  Returns true if
   * found a new source, false otherwise.
   *
   * @param targetPos target position.
   * @return true if found a new source, false otherwise.
   * @throws IOException raised on errors performing I/O.
   */
  @InterfaceAudience.Private
  boolean seekToNewSource(long targetPos) throws IOException;
}

相关信息

hadoop 源码目录

相关文章

hadoop Abortable 源码

hadoop AbstractFileSystem 源码

hadoop AvroFSInput 源码

hadoop BBPartHandle 源码

hadoop BBUploadHandle 源码

hadoop BatchListingOperations 源码

hadoop BatchedRemoteIterator 源码

hadoop BlockLocation 源码

hadoop BlockStoragePolicySpi 源码

hadoop BufferedFSInputStream 源码

0  赞