Package org.apache.hadoop.net

Class SocketInputStream

java.lang.Object

java.io.InputStream

org.apache.hadoop.net.SocketInputStream

All Implemented Interfaces:

Closeable, AutoCloseable, Channel, ReadableByteChannel

@LimitedPrivate("HDFS")
public class SocketInputStream
extends InputStream
implements ReadableByteChannel

This implements an input stream that can have a timeout while reading. This sets non-blocking flag on the socket channel. So after create this object, read() on Socket.getInputStream() and write() on Socket.getOutputStream() for the associated socket will throw IllegalBlockingModeException. Please use SocketOutputStream for writing.

Constructor Summary

Constructors

Constructor	Description
SocketInputStream(Socket socket)	Same as SocketInputStream(socket.getChannel(), socket.getSoTimeout()) : Create a new input stream with the given timeout.
SocketInputStream(Socket socket, long timeout)	Same as SocketInputStream(socket.getChannel(), timeout): Create a new input stream with the given timeout.
SocketInputStream(ReadableByteChannel channel, long timeout)	Create a new input stream with the given timeout.

Method Summary

Modifier and Type	Method	Description
void	close()
ReadableByteChannel	getChannel()
boolean	isOpen()
int	read()
int	read(byte[] b, int off, int len)
int	read(ByteBuffer dst)
void	setTimeout(long timeoutMs)
void	waitForReadable()	waits for the underlying channel to be ready for reading.

Methods inherited from class java.io.InputStream

available, mark, markSupported, nullInputStream, read, readAllBytes, readNBytes, readNBytes, reset, skip, skipNBytes, transferTo

Methods inherited from class java.lang.Object

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

Constructor Details

SocketInputStream

public SocketInputStream(ReadableByteChannel channel,
 long timeout)
                  throws IOException

Create a new input stream with the given timeout. If the timeout is zero, it will be treated as infinite timeout. The socket's channel will be configured to be non-blocking.

Parameters:

channel - Channel for reading, should also be a SelectableChannel. The channel will be configured to be non-blocking.

timeout - timeout in milliseconds. must not be negative.

Throws:

IOException - raised on errors performing I/O.

SocketInputStream

public SocketInputStream(Socket socket,
 long timeout)
                  throws IOException

Same as SocketInputStream(socket.getChannel(), timeout):

Create a new input stream with the given timeout. If the timeout is zero, it will be treated as infinite timeout. The socket's channel will be configured to be non-blocking.

Parameters:

socket - should have a channel associated with it.

timeout - timeout timeout in milliseconds. must not be negative.

Throws:

IOException - raised on errors performing I/O.

See Also:

• SocketInputStream(ReadableByteChannel, long)

SocketInputStream

public SocketInputStream(Socket socket)
                  throws IOException

Same as SocketInputStream(socket.getChannel(), socket.getSoTimeout()) :

Create a new input stream with the given timeout. If the timeout is zero, it will be treated as infinite timeout. The socket's channel will be configured to be non-blocking.

Parameters:

socket - should have a channel associated with it.

Throws:

IOException - raised on errors performing I/O.

See Also:

• SocketInputStream(ReadableByteChannel, long)

Method Details

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

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

getChannel

public ReadableByteChannel getChannel()

Returns:

Returns underlying channel used by inputstream. This is useful in certain cases like channel for FileChannel.transferFrom(ReadableByteChannel, long, long).

isOpen

public boolean isOpen()

Specified by:

isOpen in interface Channel

read

public int read(ByteBuffer dst)
         throws IOException

Specified by:

read in interface ReadableByteChannel

Throws:

IOException

waitForReadable

public void waitForReadable()
                     throws IOException

waits for the underlying channel to be ready for reading. The timeout specified for this stream applies to this wait.

Throws:

SocketTimeoutException - if select on the channel times out.

IOException - if any other I/O error occurs.

setTimeout

public void setTimeout(long timeoutMs)