com.gemstone.gemfire.internal.shared.unsafe

Class ChannelBufferUnsafeDataInputStream

java.lang.Object

java.io.InputStream

com.gemstone.gemfire.internal.shared.InputStreamChannel

com.gemstone.gemfire.internal.shared.unsafe.ChannelBufferUnsafeInputStream

com.gemstone.gemfire.internal.shared.unsafe.ChannelBufferUnsafeDataInputStream

All Implemented Interfaces:

Closeable, DataInput, AutoCloseable, Channel, ReadableByteChannel

Direct Known Subclasses:

ChannelBufferUnsafeFramedInputStream

public class ChannelBufferUnsafeDataInputStream
extends ChannelBufferUnsafeInputStream
implements DataInput

A buffered DataInput abstraction over channel using direct byte buffers, and using internal Unsafe class for best performance. Users must check for UnsafeHolder.getDirectByteBufferAddressMethod() to be non-null before trying to use this class.

The implementation is not thread-safe by design. This particular class can be used as an efficient, buffered DataInput implementation for file channels, socket channels and other similar.

Since:

gfxd 1.0

Field Summary

Fields inherited from class com.gemstone.gemfire.internal.shared.unsafe.ChannelBufferUnsafeInputStream

addrLimit, addrPosition, baseAddress, buffer, unsafe

Fields inherited from class com.gemstone.gemfire.internal.shared.InputStreamChannel

channel, PARK_NANOS, PARK_NANOS_MAX, parkedThread

Constructor Summary

Constructors

Constructor and Description
ChannelBufferUnsafeDataInputStream(ReadableByteChannel channel)
ChannelBufferUnsafeDataInputStream(ReadableByteChannel channel, int bufferSize)

Method Summary

Methods

Modifier and Type	Method and Description
protected short	getShort(long addrPos)
boolean	readBoolean()
byte	readByte()
char	readChar()
double	readDouble()
float	readFloat()
void	readFully(byte[] b)
void	readFully(byte[] b, int off, int len)
String	readLine()
long	readLong()
short	readShort()
int	readUnsignedByte()
int	readUnsignedShort()
String	readUTF()
int	skipBytes(int n) Currently not supported by this implementation.

Methods inherited from class com.gemstone.gemfire.internal.shared.unsafe.ChannelBufferUnsafeInputStream

allocateBuffer, available, close, getInt, isOpen, read, read, read, read, readInt, refillBuffer, resetBufferPositions

Methods inherited from class com.gemstone.gemfire.internal.shared.InputStreamChannel

getParkedThread, getUnderlyingChannel, readBuffered, readFrame, readFrameFragment, readIntoBuffer, readIntoBufferNonBlocking, resetAndCopyLeftOverBytes

Methods inherited from class java.io.InputStream

mark, markSupported, 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.io.DataInput

readInt

Constructor Detail

ChannelBufferUnsafeDataInputStream

public ChannelBufferUnsafeDataInputStream(ReadableByteChannel channel)
                                   throws IOException

Throws:

IOException

ChannelBufferUnsafeDataInputStream

public ChannelBufferUnsafeDataInputStream(ReadableByteChannel channel,
                                  int bufferSize)
                                   throws IOException

Throws:

IOException

Method Detail

readFully

public final void readFully(byte[] b)
                     throws IOException

Specified by:

readFully in interface DataInput

Throws:

IOException

readFully

public final void readFully(byte[] b,
             int off,
             int len)
                     throws IOException

Specified by:

readFully in interface DataInput

Throws:

IOException

skipBytes

public int skipBytes(int n)
              throws IOException

Currently not supported by this implementation.

Specified by:

skipBytes in interface DataInput

Throws:

IOException

readBoolean

public final boolean readBoolean()
                          throws IOException

Specified by:

readBoolean in interface DataInput

Throws:

IOException

readByte

public final byte readByte()
                    throws IOException

Specified by:

readByte in interface DataInput

Throws:

IOException

readUnsignedByte

public final int readUnsignedByte()
                           throws IOException

Specified by:

readUnsignedByte in interface DataInput

Throws:

IOException

readShort

public final short readShort()
                      throws IOException

Specified by:

readShort in interface DataInput

Throws:

IOException

readUnsignedShort

public final int readUnsignedShort()
                            throws IOException

Specified by:

readUnsignedShort in interface DataInput

Throws:

IOException

readChar

public final char readChar()
                    throws IOException

Specified by:

readChar in interface DataInput

Throws:

IOException

readLong

public final long readLong()
                    throws IOException

Specified by:

readLong in interface DataInput

Throws:

IOException

readFloat

public final float readFloat()
                      throws IOException

Specified by:

readFloat in interface DataInput

Throws:

IOException

readDouble

public final double readDouble()
                        throws IOException

Specified by:

readDouble in interface DataInput

Throws:

IOException

readLine

public String readLine()

Specified by:

readLine in interface DataInput

readUTF

public String readUTF()
               throws IOException

Specified by:

readUTF in interface DataInput

Throws:

IOException

getShort

protected final short getShort(long addrPos)