org.apache.flink.runtime.io.network.partition

类 BufferReaderWriterUtil

java.lang.Object

org.apache.flink.runtime.io.network.partition.BufferReaderWriterUtil

public final class BufferReaderWriterUtil
extends Object

Putting and getting of a sequence of buffers to/from a FileChannel or a ByteBuffer. This class handles the headers, length encoding, memory slicing.

The encoding is the same across FileChannel and ByteBuffer, so this class can write to a file and read from the byte buffer that results from mapping this file to memory.

字段概要

字段

限定符和类型	字段和说明
static int	HEADER_LENGTH

构造器概要

构造器

构造器和说明
BufferReaderWriterUtil()

方法概要

限定符和类型	方法和说明
static ByteBuffer	allocatedHeaderBuffer()
static void	positionToNextBuffer(FileChannel channel, ByteBuffer headerBuffer) Skip one data buffer from the channel's current position by headerBuffer.
static void	readByteBufferFully(FileChannel channel, ByteBuffer b, long position)
static Buffer	readFromByteChannel(FileChannel channel, ByteBuffer headerBuffer, org.apache.flink.core.memory.MemorySegment memorySegment, BufferRecycler bufferRecycler)
static void	setByteChannelBufferHeader(Buffer buffer, ByteBuffer header)
static void	writeBuffers(FileChannel channel, long bytesExpected, ByteBuffer... buffers)

从类继承的方法 java.lang.Object

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

字段详细资料

HEADER_LENGTH

public static final int HEADER_LENGTH

另请参阅:

常量字段值

构造器详细资料

BufferReaderWriterUtil

public BufferReaderWriterUtil()

方法详细资料

setByteChannelBufferHeader

public static void setByteChannelBufferHeader(Buffer buffer,
                                              ByteBuffer header)

readFromByteChannel

@Nullable
public static Buffer readFromByteChannel(FileChannel channel,
                                                   ByteBuffer headerBuffer,
                                                   org.apache.flink.core.memory.MemorySegment memorySegment,
                                                   BufferRecycler bufferRecycler)
                                            throws IOException

抛出:

IOException

allocatedHeaderBuffer

public static ByteBuffer allocatedHeaderBuffer()

positionToNextBuffer

public static void positionToNextBuffer(FileChannel channel,
                                        ByteBuffer headerBuffer)
                                 throws IOException

Skip one data buffer from the channel's current position by headerBuffer.

抛出:

IOException

readByteBufferFully

public static void readByteBufferFully(FileChannel channel,
                                       ByteBuffer b,
                                       long position)
                                throws IOException

抛出:

IOException

writeBuffers

public static void writeBuffers(FileChannel channel,
                                long bytesExpected,
                                ByteBuffer... buffers)
                         throws IOException

抛出:

IOException