com.gemstone.gemfire.internal.shared.unsafe

Class ChannelBufferUnsafeDataOutputStream

java.lang.Object

java.io.OutputStream

com.gemstone.gemfire.internal.shared.OutputStreamChannel

com.gemstone.gemfire.internal.shared.unsafe.ChannelBufferUnsafeOutputStream

com.gemstone.gemfire.internal.shared.unsafe.ChannelBufferUnsafeDataOutputStream

All Implemented Interfaces:

StreamChannel, java.io.Closeable, java.io.DataOutput, java.io.Flushable, java.lang.AutoCloseable, java.nio.channels.Channel, java.nio.channels.WritableByteChannel

Direct Known Subclasses:

ChannelBufferUnsafeFramedOutputStream

public class ChannelBufferUnsafeDataOutputStream
extends ChannelBufferUnsafeOutputStream
implements java.io.DataOutput

A buffered DataOutput abstraction over channel using direct byte buffers, and using internal Unsafe class for best performance. Users must check for UnsafeHolder.hasUnsafe() before trying to use this class.

The implementation is not thread-safe by design. This particular class can be used as an efficient, buffered DataOutput 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.ChannelBufferUnsafeOutputStream

addrLimit, addrPosition, baseAddress, buffer, MIN_BUFFER_SIZE

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

bytesWritten, channel

Constructor Summary

Constructors

Constructor and Description
ChannelBufferUnsafeDataOutputStream(java.nio.channels.WritableByteChannel channel)
ChannelBufferUnsafeDataOutputStream(java.nio.channels.WritableByteChannel channel, int bufferSize)

Method Summary

Modifier and Type	Method and Description
protected static long	putLong(long addrPos, long v) Write a long in big-endian format on given off-heap address.
protected static long	putShort(long addrPos, int v) Write a short in big-endian format on given off-heap address.
void	writeBoolean(boolean v)
void	writeByte(int v)
void	writeBytes(java.lang.String s)
void	writeChar(int v)
void	writeChars(java.lang.String s)
void	writeDouble(double v)
void	writeFloat(float v)
void	writeLong(long v)
void	writeShort(int v)
void	writeUTF(java.lang.String str)
static long	writeUTFSegmentNoOverflow(java.lang.String str, int offset, int length, int utfLen, java.lang.Object target, long addrPos)

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

allocateBuffer, close, closeChannel, flush, flushBufferBlocking, getInternalBuffer, isOpen, position, putByte, putInt, releaseBuffer, resetBufferPositions, write_, write, write, write, write, writeInt

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

flushBufferNonBlockingBase, getBytesWritten, getParkedThread, getParkNanosMax, getUnderlyingChannel, isSocketToSameHost, setParkedThread, writeBuffer, writeBuffered, writeBufferNoWait

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.io.DataOutput

write, write, write, writeInt

Constructor Detail

ChannelBufferUnsafeDataOutputStream

public ChannelBufferUnsafeDataOutputStream(java.nio.channels.WritableByteChannel channel)

ChannelBufferUnsafeDataOutputStream

public ChannelBufferUnsafeDataOutputStream(java.nio.channels.WritableByteChannel channel,
                                           int bufferSize)

Method Detail

writeBoolean

public final void writeBoolean(boolean v)
                        throws java.io.IOException

Specified by:

writeBoolean in interface java.io.DataOutput

Throws:

java.io.IOException

writeByte

public final void writeByte(int v)
                     throws java.io.IOException

Specified by:

writeByte in interface java.io.DataOutput

Throws:

java.io.IOException

writeShort

public final void writeShort(int v)
                      throws java.io.IOException

Specified by:

writeShort in interface java.io.DataOutput

Throws:

java.io.IOException

writeChar

public final void writeChar(int v)
                     throws java.io.IOException

Specified by:

writeChar in interface java.io.DataOutput

Throws:

java.io.IOException

writeLong

public final void writeLong(long v)
                     throws java.io.IOException

Specified by:

writeLong in interface java.io.DataOutput

Throws:

java.io.IOException

writeFloat

public final void writeFloat(float v)
                      throws java.io.IOException

Specified by:

writeFloat in interface java.io.DataOutput

Throws:

java.io.IOException

writeDouble

public final void writeDouble(double v)
                       throws java.io.IOException

Specified by:

writeDouble in interface java.io.DataOutput

Throws:

java.io.IOException

writeBytes

public final void writeBytes(@Nonnull
                             java.lang.String s)
                      throws java.io.IOException

Specified by:

writeBytes in interface java.io.DataOutput

Throws:

java.io.IOException

writeChars

public final void writeChars(@Nonnull
                             java.lang.String s)
                      throws java.io.IOException

Specified by:

writeChars in interface java.io.DataOutput

Throws:

java.io.IOException

writeUTF

public final void writeUTF(@Nonnull
                           java.lang.String str)
                    throws java.io.IOException

Specified by:

writeUTF in interface java.io.DataOutput

Throws:

java.io.IOException

writeUTFSegmentNoOverflow

public static long writeUTFSegmentNoOverflow(java.lang.String str,
                                             int offset,
                                             int length,
                                             int utfLen,
                                             java.lang.Object target,
                                             long addrPos)

putShort

protected static long putShort(long addrPos,
                               int v)

Write a short in big-endian format on given off-heap address.

putLong

protected static long putLong(long addrPos,
                              long v)

Write a long in big-endian format on given off-heap address.