org.apache.hadoop.fs.aliyun.oss

Class AliyunOSSInputStream

java.lang.Object

java.io.InputStream

org.apache.hadoop.fs.FSInputStream

org.apache.hadoop.fs.aliyun.oss.AliyunOSSInputStream

All Implemented Interfaces:

Closeable, AutoCloseable, org.apache.hadoop.fs.PositionedReadable, org.apache.hadoop.fs.Seekable

public class AliyunOSSInputStream
extends org.apache.hadoop.fs.FSInputStream

The input stream for OSS blob system. The class uses multi-part downloading to read data from the object content stream.

Field Summary

Fields

Modifier and Type	Field and Description
static org.slf4j.Logger	LOG

Constructor Summary

Constructors

Constructor and Description
AliyunOSSInputStream(org.apache.hadoop.conf.Configuration conf, ExecutorService readAheadExecutorService, int maxReadAheadPartNumber, AliyunOSSFileSystemStore store, String key, Long contentLength, org.apache.hadoop.fs.FileSystem.Statistics statistics)

Method Summary

Modifier and Type	Method and Description
int	available()
void	close()
long	getExpectNextPos()
long	getPos()
int	read()
int	read(byte[] buf, int off, int len)
void	seek(long pos)
boolean	seekToNewSource(long targetPos)

Methods inherited from class org.apache.hadoop.fs.FSInputStream

read, readFully, readFully, validatePositionedReadArgs

Methods inherited from class java.io.InputStream

mark, markSupported, read, reset, skip

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LOG

public static final org.slf4j.Logger LOG

Constructor Detail

AliyunOSSInputStream

public AliyunOSSInputStream(org.apache.hadoop.conf.Configuration conf,
                            ExecutorService readAheadExecutorService,
                            int maxReadAheadPartNumber,
                            AliyunOSSFileSystemStore store,
                            String key,
                            Long contentLength,
                            org.apache.hadoop.fs.FileSystem.Statistics statistics)
                     throws IOException

Throws:

IOException

Method Detail

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Throws:

IOException

read

public int read(byte[] buf,
                int off,
                int len)
         throws IOException

Overrides:

read in class InputStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Overrides:

close in class InputStream

Throws:

IOException

available

public int available()
              throws IOException

Overrides:

available in class InputStream

Throws:

IOException

seek

public void seek(long pos)
          throws IOException

Specified by:

seek in interface org.apache.hadoop.fs.Seekable

Specified by:

seek in class org.apache.hadoop.fs.FSInputStream

Throws:

IOException

getPos

public long getPos()
            throws IOException

Specified by:

getPos in interface org.apache.hadoop.fs.Seekable

Specified by:

getPos in class org.apache.hadoop.fs.FSInputStream

Throws:

IOException

seekToNewSource

public boolean seekToNewSource(long targetPos)
                        throws IOException

Specified by:

seekToNewSource in interface org.apache.hadoop.fs.Seekable

Specified by:

seekToNewSource in class org.apache.hadoop.fs.FSInputStream

Throws:

IOException

getExpectNextPos

public long getExpectNextPos()