org.apache.flink.runtime.operators.sort

Interface InMemorySorter<T>

All Superinterfaces:

IndexedSortable

All Known Implementing Classes:

FixedLengthRecordSorter, NormalizedKeySorter

public interface InMemorySorter<T>
extends IndexedSortable

Method Summary

Modifier and Type	Method and Description
void	dispose() Disposes the sorter.
long	getCapacity() Gets the total capacity of this sorter, in bytes.
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.
void	reset() Resets the sort buffer back to the state where it is empty.
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)

Methods inherited from interface org.apache.flink.runtime.operators.sort.IndexedSortable

compare, size, swap

Method Detail

reset

void reset()

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

isEmpty

boolean isEmpty()

Checks whether the buffer is empty.

Returns:

True, if no record is contained, false otherwise.

dispose

void dispose()

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

getCapacity

long getCapacity()

Gets the total capacity of this sorter, in bytes.

Returns:

The sorter's total capacity.

getOccupancy

long getOccupancy()

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

Returns:

The number of bytes occupied.

getRecord

T getRecord(int logicalPosition)
     throws IOException

Gets the record at the given logical position.

Parameters:

logicalPosition - The logical position of the record.

Throws:

IOException - Thrown, if an exception occurred during deserialization.

getRecord

T getRecord(T reuse,
            int logicalPosition)
     throws IOException

Gets the record at the given logical position.

Parameters:

reuse - The reuse object to deserialize the record into.

logicalPosition - The logical position of the record.

Throws:

IOException - Thrown, if an exception occurred during deserialization.

write

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.

Parameters:

record - The record to be written.

Returns:

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

Throws:

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

getIterator

MutableObjectIterator<T> getIterator()

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

Returns:

An iterator returning the records in their logical order.

writeToOutput

void writeToOutput(ChannelWriterOutputView output)
            throws IOException

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

Parameters:

output - The output view to write the records to.

Throws:

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

writeToOutput

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

Throws:

IOException

writeToOutput

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.

Parameters:

output - The output view to write the records to.

start - The logical start position of the subset.

num - The number of elements to write.

Throws:

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