com.gemstone.gemfire.internal.shared

Class InputStreamChannel

java.lang.Object

java.io.InputStream

com.gemstone.gemfire.internal.shared.InputStreamChannel

All Implemented Interfaces:

StreamChannel, java.io.Closeable, java.lang.AutoCloseable, java.nio.channels.Channel, java.nio.channels.ReadableByteChannel

Direct Known Subclasses:

ChannelBufferInputStream, ChannelBufferUnsafeInputStream

public abstract class InputStreamChannel
extends java.io.InputStream
implements java.nio.channels.ReadableByteChannel, StreamChannel

Intermediate class that extends both an InputStream and ReadableByteChannel.

Since:

gfxd 1.1

Field Summary

Fields

Modifier and Type	Field and Description
protected long	bytesRead
protected java.nio.channels.ReadableByteChannel	channel

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	InputStreamChannel(java.nio.channels.ReadableByteChannel channel)

Method Summary

Modifier and Type	Method and Description
long	getBytesRead()
java.lang.Thread	getParkedThread() Return the thread if waiting for read/write on this channel.
long	getParkNanosMax() Maximum time to wait before giving up read/write on channel
java.nio.channels.ReadableByteChannel	getUnderlyingChannel() Get the underlying ReadableByteChannel.
abstract int	read(java.nio.ByteBuffer dst)
protected int	readBuffered(java.nio.ByteBuffer dst, java.nio.ByteBuffer channelBuffer) Common base method to read into a given ByteBuffer destination via an intermediate direct byte buffer owned by the implementation of this class.
int	readFrame()
int	readFrameFragment(int fragmentSize)
abstract int	readInt() Reads four input bytes and returns an int value.
protected int	readIntoBuffer(java.nio.ByteBuffer buffer) Fill the given buffer reading data from channel at least one byte unless end-of-stream has been reached.
protected int	readIntoBufferNoWait(java.nio.ByteBuffer buffer) Fill the given buffer reading data from channel whatever is available in one call (non-blocking if channel is so configured).
protected int	refillBuffer(java.nio.ByteBuffer channelBuffer, int tryReadBytes, java.lang.String eofMessage)
protected int	refillBufferBase(java.nio.ByteBuffer channelBuffer, int tryReadBytes, java.lang.String eofMessage)
protected void	resetAndCopyLeftOverBytes(java.nio.ByteBuffer channelBuffer)
void	setParkedThread(java.lang.Thread thread) Set the thread waiting for read/write on this channel (null to clear).

Methods inherited from class java.io.InputStream

available, close, mark, markSupported, read, read, read, reset, skip

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.nio.channels.Channel

close, isOpen

Field Detail

channel

protected final java.nio.channels.ReadableByteChannel channel

bytesRead

protected volatile long bytesRead

Constructor Detail

InputStreamChannel

protected InputStreamChannel(java.nio.channels.ReadableByteChannel channel)

Method Detail

getUnderlyingChannel

public final java.nio.channels.ReadableByteChannel getUnderlyingChannel()

Get the underlying ReadableByteChannel.

read

public abstract int read(java.nio.ByteBuffer dst)
                  throws java.io.IOException

Specified by:

read in interface java.nio.channels.ReadableByteChannel

Throws:

java.io.IOException

readInt

public abstract int readInt()
                     throws java.io.IOException

Reads four input bytes and returns an int value. Let a-d be the first through fourth bytes read. The value returned is:

 
 (((a & 0xff) << 24) | ((b & 0xff) << 16) |
  ((c & 0xff) << 8) | (d & 0xff))
 
 

This method is suitable for reading bytes written by the writeInt method of interface DataOutput.

Returns:

the int value read.

Throws:

java.io.EOFException - if this stream reaches the end before reading all the bytes.

java.io.IOException - if an I/O error occurs.

readFrame

public int readFrame()
              throws java.io.IOException

Throws:

java.io.IOException

readFrameFragment

public int readFrameFragment(int fragmentSize)
                      throws java.io.IOException

Throws:

java.io.IOException

readBuffered

protected final int readBuffered(java.nio.ByteBuffer dst,
                                 java.nio.ByteBuffer channelBuffer)
                          throws java.io.IOException

Common base method to read into a given ByteBuffer destination via an intermediate direct byte buffer owned by the implementation of this class.

Throws:

java.io.IOException

refillBuffer

protected int refillBuffer(java.nio.ByteBuffer channelBuffer,
                           int tryReadBytes,
                           java.lang.String eofMessage)
                    throws java.io.IOException

Throws:

java.io.IOException

refillBufferBase

protected final int refillBufferBase(java.nio.ByteBuffer channelBuffer,
                                     int tryReadBytes,
                                     java.lang.String eofMessage)
                              throws java.io.IOException

Throws:

java.io.IOException

resetAndCopyLeftOverBytes

protected void resetAndCopyLeftOverBytes(java.nio.ByteBuffer channelBuffer)

readIntoBuffer

protected int readIntoBuffer(java.nio.ByteBuffer buffer)
                      throws java.io.IOException

Fill the given buffer reading data from channel at least one byte unless end-of-stream has been reached.

Returns:

number of bytes read or -1 on end-of-stream

Throws:

java.io.IOException

getParkedThread

public final java.lang.Thread getParkedThread()

Description copied from interface: StreamChannel

Return the thread if waiting for read/write on this channel.

Specified by:

getParkedThread in interface StreamChannel

setParkedThread

public final void setParkedThread(java.lang.Thread thread)

Description copied from interface: StreamChannel

Set the thread waiting for read/write on this channel (null to clear).

Specified by:

setParkedThread in interface StreamChannel

getParkNanosMax

public long getParkNanosMax()

Description copied from interface: StreamChannel

Maximum time to wait before giving up read/write on channel

Specified by:

getParkNanosMax in interface StreamChannel

readIntoBufferNoWait

protected int readIntoBufferNoWait(java.nio.ByteBuffer buffer)
                            throws java.io.IOException

Fill the given buffer reading data from channel whatever is available in one call (non-blocking if channel is so configured).

Returns:

number of bytes read (can be zero) or -1 on end-of-stream

Throws:

java.io.IOException

getBytesRead

public final long getBytesRead()