org.apache.flink.runtime.operators.sort

类 FixedLengthRecordSorter<T>

java.lang.Object

org.apache.flink.runtime.operators.sort.FixedLengthRecordSorter<T>

所有已实现的接口:

IndexedSortable, InMemorySorter<T>, org.apache.flink.util.Disposable

public final class FixedLengthRecordSorter<T>
extends Object
implements InMemorySorter<T>

构造器概要

构造器

构造器和说明
FixedLengthRecordSorter(org.apache.flink.api.common.typeutils.TypeSerializer<T> serializer, org.apache.flink.api.common.typeutils.TypeComparator<T> comparator, List<org.apache.flink.core.memory.MemorySegment> memory)

方法概要

限定符和类型	方法和说明
int	compare(int i, int j) Compare items at the given addresses consistent with the semantics of Comparator.compare(Object, Object).
int	compare(int segmentNumberI, int segmentOffsetI, int segmentNumberJ, int segmentOffsetJ) Compare records at the given addresses consistent with the semantics of Comparator.compare(Object, Object).
void	dispose() Disposes the sorter.
long	getCapacity() Gets the total capacity of this sorter, in bytes.
org.apache.flink.util.MutableObjectIterator<T>	getIterator() Gets an iterator over all records in this buffer in their logical order.
long	getOccupancy() Gets the number of bytes currently occupied in this sorter, records and sort index.
T	getRecord(int logicalPosition) Gets the record at the given logical position.
T	getRecord(T reuse, int logicalPosition) Gets the record at the given logical position.
boolean	isEmpty() Checks whether the buffer is empty.
int	recordSize() Gets the size of each record, the number of bytes separating the head of successive records.
int	recordsPerSegment() Gets the number of elements in each memory segment.
void	reset() Resets the sort buffer back to the state where it is empty.
int	size() Gets the number of elements in the sortable.
void	swap(int i, int j) Swap items at the given addresses.
void	swap(int segmentNumberI, int segmentOffsetI, int segmentNumberJ, int segmentOffsetJ) Swap records at the given addresses.
boolean	write(T record) Writes a given record to this sort buffer.
void	writeToOutput(ChannelWriterOutputView output) Writes the records in this buffer in their logical order to the given output.
void	writeToOutput(ChannelWriterOutputView output, int start, int num) Writes a subset of the records in this buffer in their logical order to the given output.
void	writeToOutput(ChannelWriterOutputView output, LargeRecordHandler<T> largeRecordsOutput)

从类继承的方法 java.lang.Object

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

构造器详细资料

FixedLengthRecordSorter

public FixedLengthRecordSorter(org.apache.flink.api.common.typeutils.TypeSerializer<T> serializer,
                               org.apache.flink.api.common.typeutils.TypeComparator<T> comparator,
                               List<org.apache.flink.core.memory.MemorySegment> memory)

方法详细资料

recordSize

public int recordSize()

从接口复制的说明: IndexedSortable

Gets the size of each record, the number of bytes separating the head of successive records.

指定者:

recordSize 在接口中 IndexedSortable

返回:

The record size

recordsPerSegment

public int recordsPerSegment()

从接口复制的说明: IndexedSortable

Gets the number of elements in each memory segment.

指定者:

recordsPerSegment 在接口中 IndexedSortable

返回:

The number of records per segment

reset

public void reset()

Resets the sort buffer back to the state where it is empty. All contained data is discarded.

指定者:

reset 在接口中 InMemorySorter<T>

isEmpty

public boolean isEmpty()

Checks whether the buffer is empty.

指定者:

isEmpty 在接口中 InMemorySorter<T>

返回:

True, if no record is contained, false otherwise.

dispose

public void dispose()

从接口复制的说明: InMemorySorter

Disposes the sorter. This method does not release the memory segments used by the sorter.

指定者:

dispose 在接口中 InMemorySorter<T>

指定者:

dispose 在接口中 org.apache.flink.util.Disposable

getCapacity

public long getCapacity()

从接口复制的说明: InMemorySorter

Gets the total capacity of this sorter, in bytes.

指定者:

getCapacity 在接口中 InMemorySorter<T>

返回:

The sorter's total capacity.

getOccupancy

public long getOccupancy()

从接口复制的说明: InMemorySorter

Gets the number of bytes currently occupied in this sorter, records and sort index.

指定者:

getOccupancy 在接口中 InMemorySorter<T>

返回:

The number of bytes occupied.

getRecord

public T getRecord(int logicalPosition)
            throws IOException

从接口复制的说明: InMemorySorter

Gets the record at the given logical position.

指定者:

getRecord 在接口中 InMemorySorter<T>

参数:

logicalPosition - The logical position of the record.

抛出:

IOException - Thrown, if an exception occurred during deserialization.

getRecord

public T getRecord(T reuse,
                   int logicalPosition)
            throws IOException

从接口复制的说明: InMemorySorter

Gets the record at the given logical position.

指定者:

getRecord 在接口中 InMemorySorter<T>

参数:

reuse - The reuse object to deserialize the record into.

logicalPosition - The logical position of the record.

抛出:

IOException - Thrown, if an exception occurred during deserialization.

write

public boolean write(T record)
              throws IOException

Writes a given record to this sort buffer. The written record will be appended and take the last logical position.

指定者:

write 在接口中 InMemorySorter<T>

参数:

record - The record to be written.

返回:

True, if the record was successfully written, false, if the sort buffer was full.

抛出:

IOException - Thrown, if an error occurred while serializing the record into the buffers.

compare

public int compare(int i,
                   int j)

从接口复制的说明: IndexedSortable

Compare items at the given addresses consistent with the semantics of Comparator.compare(Object, Object).

指定者:

compare 在接口中 IndexedSortable

compare

public int compare(int segmentNumberI,
                   int segmentOffsetI,
                   int segmentNumberJ,
                   int segmentOffsetJ)

从接口复制的说明: IndexedSortable

Compare records at the given addresses consistent with the semantics of Comparator.compare(Object, Object).

指定者:

compare 在接口中 IndexedSortable

参数:

segmentNumberI - index of memory segment containing first record

segmentOffsetI - offset into memory segment containing first record

segmentNumberJ - index of memory segment containing second record

segmentOffsetJ - offset into memory segment containing second record

返回:

a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.

swap

public void swap(int i,
                 int j)

从接口复制的说明: IndexedSortable

Swap items at the given addresses.

指定者:

swap 在接口中 IndexedSortable

swap

public void swap(int segmentNumberI,
                 int segmentOffsetI,
                 int segmentNumberJ,
                 int segmentOffsetJ)

从接口复制的说明: IndexedSortable

Swap records at the given addresses.

指定者:

swap 在接口中 IndexedSortable

参数:

segmentNumberI - index of memory segment containing first record

segmentOffsetI - offset into memory segment containing first record

segmentNumberJ - index of memory segment containing second record

segmentOffsetJ - offset into memory segment containing second record

size

public int size()

从接口复制的说明: IndexedSortable

Gets the number of elements in the sortable.

指定者:

size 在接口中 IndexedSortable

返回:

The number of elements.

getIterator

public final org.apache.flink.util.MutableObjectIterator<T> getIterator()

Gets an iterator over all records in this buffer in their logical order.

指定者:

getIterator 在接口中 InMemorySorter<T>

返回:

An iterator returning the records in their logical order.

writeToOutput

public void writeToOutput(ChannelWriterOutputView output)
                   throws IOException

Writes the records in this buffer in their logical order to the given output.

指定者:

writeToOutput 在接口中 InMemorySorter<T>

参数:

output - The output view to write the records to.

抛出:

IOException - Thrown, if an I/O exception occurred writing to the output view.

writeToOutput

public void writeToOutput(ChannelWriterOutputView output,
                          LargeRecordHandler<T> largeRecordsOutput)
                   throws IOException

指定者:

writeToOutput 在接口中 InMemorySorter<T>

抛出:

IOException

writeToOutput

public void writeToOutput(ChannelWriterOutputView output,
                          int start,
                          int num)
                   throws IOException

Writes a subset of the records in this buffer in their logical order to the given output.

指定者:

writeToOutput 在接口中 InMemorySorter<T>

参数:

output - The output view to write the records to.

start - The logical start position of the subset.

num - The number of elements to write.

抛出:

IOException - Thrown, if an I/O exception occurred writing to the output view.