接口 org.apache.hadoop.hdfs.BlockReader
的使用

使用BlockReader的程序包

程序包	说明
org.apache.hadoop.hdfs	A distributed implementation of FileSystem.

org.apache.hadoop.hdfs中BlockReader的使用

实现BlockReader的org.apache.hadoop.hdfs中的类

限定符和类型	类和说明
static class	DFSClient.RemoteBlockReader This is a wrapper around connection to datadone and understands checksum, offset etc

返回BlockReader的org.apache.hadoop.hdfs中的方法

限定符和类型	方法和说明
static BlockReader	DFSClient.RemoteBlockReader.newBlockReader(Socket sock, String file, long blockId, Token<BlockTokenIdentifier> accessToken, long genStamp, long startOffset, long len, int bufferSize)
static BlockReader	DFSClient.RemoteBlockReader.newBlockReader(Socket sock, String file, long blockId, Token<BlockTokenIdentifier> accessToken, long genStamp, long startOffset, long len, int bufferSize, boolean verifyChecksum) Creates a new BlockReader for the given blockId.
static BlockReader	DFSClient.RemoteBlockReader.newBlockReader(Socket sock, String file, long blockId, Token<BlockTokenIdentifier> accessToken, long genStamp, long startOffset, long len, int bufferSize, boolean verifyChecksum, String clientName)