org.apache.flink.cdc.common.data.binary

接口 BinaryFormat

所有已知实现类:

BinaryArrayData, BinaryMapData, BinaryRecordData, BinarySection, BinaryStringData, LazyBinaryFormat

@Internal
public interface BinaryFormat

Binary format spanning MemorySegments.

字段概要

字段

限定符和类型	字段和说明
static long	HIGHEST_FIRST_BIT To get the mark in highest bit of long.
static long	HIGHEST_SECOND_TO_EIGHTH_BIT To get the 7 bits length in second bit to eighth bit out of a long.
static int	MAX_FIX_PART_DATA_SIZE It decides whether to put data in FixLenPart or VarLenPart.

方法概要

限定符和类型	方法和说明
int	getOffset() Gets the start offset of this binary data in the MemorySegments.
org.apache.flink.core.memory.MemorySegment[]	getSegments() Gets the underlying MemorySegments this binary format spans.
int	getSizeInBytes() Gets the size in bytes of this binary data.

字段详细资料

MAX_FIX_PART_DATA_SIZE

static final int MAX_FIX_PART_DATA_SIZE

It decides whether to put data in FixLenPart or VarLenPart. See more in BinaryRecordData.

If len is less than 8, its binary format is: 1-bit mark(1) = 1, 7-bits len, and 7-bytes data. Data is stored in fix-length part.

If len is greater or equal to 8, its binary format is: 1-bit mark(1) = 0, 31-bits offset to the data, and 4-bytes length of data. Data is stored in variable-length part.

另请参阅:

常量字段值

HIGHEST_FIRST_BIT

static final long HIGHEST_FIRST_BIT

To get the mark in highest bit of long. Form: 10000000 00000000 ... (8 bytes)

This is used to decide whether the data is stored in fixed-length part or variable-length part. see MAX_FIX_PART_DATA_SIZE for more information.

另请参阅:

常量字段值

HIGHEST_SECOND_TO_EIGHTH_BIT

static final long HIGHEST_SECOND_TO_EIGHTH_BIT

To get the 7 bits length in second bit to eighth bit out of a long. Form: 01111111 00000000 ... (8 bytes)

This is used to get the length of the data which is stored in this long. see MAX_FIX_PART_DATA_SIZE for more information.

另请参阅:

常量字段值

方法详细资料

getSegments

org.apache.flink.core.memory.MemorySegment[] getSegments()

Gets the underlying MemorySegments this binary format spans.

getOffset

int getOffset()

Gets the start offset of this binary data in the MemorySegments.

getSizeInBytes

int getSizeInBytes()

Gets the size in bytes of this binary data.