Package org.apache.sshd.sftp.client.impl

Class SftpInputStreamAsync

java.lang.Object

java.io.InputStream

org.apache.sshd.common.util.io.input.InputStreamWithChannel

org.apache.sshd.sftp.client.impl.SftpInputStreamAsync

All Implemented Interfaces:

Closeable, AutoCloseable, Channel, SftpClientHolder

public class SftpInputStreamAsync
extends org.apache.sshd.common.util.io.input.InputStreamWithChannel
implements SftpClientHolder

Field Summary

Fields

Modifier and Type	Field	Description
protected byte[]	bb
protected org.apache.sshd.common.util.buffer.Buffer	buffer
protected boolean	bufferAdjusted
protected int	bufferSize
protected long	clientOffset
protected boolean	eofIndicator
protected long	fileSize
protected SftpClient.CloseableHandle	handle
protected org.slf4j.Logger	log
protected int	maxReceived
protected Deque<SftpAckData>	pendingReads
protected long	requestOffset
protected long	shortReads

Constructor Summary

Constructors

Constructor	Description
SftpInputStreamAsync(AbstractSftpClient client, int bufferSize, long clientOffset, long fileSize, String path, SftpClient.CloseableHandle handle)
SftpInputStreamAsync(AbstractSftpClient client, int bufferSize, String path, Collection<SftpClient.OpenMode> mode)

Method Summary

Modifier and Type	Method	Description
protected int	adjustBufferIfNeeded(int currentBufferSize, long nOfShortReads, int maxBufferReceived, long gap)	Dynamically adjust the SFTP buffer size, if it is too large.
void	close()
protected boolean	fillData()
AbstractSftpClient	getClient()
String	getPath()	The remotely accessed file path
protected boolean	hasNoData()
boolean	isEof()	Check if the stream is at EOF
boolean	isOpen()
protected void	pollBuffer(SftpAckData ack)
int	read()
int	read(byte[] b, int off, int len)
protected void	sendRequests()
long	skip(long n)
String	toString()
long	transferTo(long len, WritableByteChannel out)
long	transferTo(OutputStream out)

Methods inherited from class java.io.InputStream

available, mark, markSupported, nullInputStream, read, readAllBytes, readNBytes, readNBytes, reset

Methods inherited from class java.lang.Object

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

Field Detail

log

protected final org.slf4j.Logger log

bb

protected final byte[] bb

fileSize

protected final long fileSize

buffer

protected org.apache.sshd.common.util.buffer.Buffer buffer

handle

protected SftpClient.CloseableHandle handle

requestOffset

protected long requestOffset

clientOffset

protected long clientOffset

pendingReads

protected final Deque<SftpAckData> pendingReads

eofIndicator

protected boolean eofIndicator

bufferSize

protected int bufferSize

maxReceived

protected int maxReceived

shortReads

protected long shortReads

bufferAdjusted

protected boolean bufferAdjusted

Constructor Detail

SftpInputStreamAsync

public SftpInputStreamAsync(AbstractSftpClient client,
                            int bufferSize,
                            String path,
                            Collection<SftpClient.OpenMode> mode)
                     throws IOException

Throws:

IOException

SftpInputStreamAsync

public SftpInputStreamAsync(AbstractSftpClient client,
                            int bufferSize,
                            long clientOffset,
                            long fileSize,
                            String path,
                            SftpClient.CloseableHandle handle)

Method Detail

getClient

public final AbstractSftpClient getClient()

Specified by:

getClient in interface SftpClientHolder

getPath

public final String getPath()

The remotely accessed file path

Returns:

Remote file path

isEof

public boolean isEof()

Check if the stream is at EOF

Returns:

true if all the data has been consumer

isOpen

public boolean isOpen()

Specified by:

isOpen in interface Channel

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Throws:

IOException

read

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

Overrides:

read in class InputStream

Throws:

IOException

transferTo

public long transferTo(long len,
                       WritableByteChannel out)
                throws IOException

Throws:

IOException

transferTo

public long transferTo(OutputStream out)
                throws IOException

Overrides:

transferTo in class InputStream

Throws:

IOException

skip

public long skip(long n)
          throws IOException

Overrides:

skip in class InputStream

Throws:

IOException

hasNoData

protected boolean hasNoData()

sendRequests

protected void sendRequests()
                     throws IOException

Throws:

IOException

fillData

protected boolean fillData()
                    throws IOException

Throws:

IOException

adjustBufferIfNeeded

protected int adjustBufferIfNeeded(int currentBufferSize,
                                   long nOfShortReads,
                                   int maxBufferReceived,
                                   long gap)

Dynamically adjust the SFTP buffer size, if it is too large. Although it is possible to reduce the buffer size to a single byte, in practice some sane lower limit (like, 8kB) should be maintained.

Parameters:

currentBufferSize - the current SFTP buffer size

nOfShortReads - the number of short reads so far

maxBufferReceived - the maximum number of bytes the server returned in any previous read request

gap - the size of the gap just filled

Returns:

a new buffer size in the range [1..currentBufferSize].

pollBuffer

protected void pollBuffer(SftpAckData ack)
                   throws IOException

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Channel

Specified by:

close in interface Closeable

Overrides:

close in class InputStream

Throws:

IOException

toString

public String toString()

Overrides:

toString in class Object