io.prestosql.spiller

Interface PartitioningSpiller

All Superinterfaces:

AutoCloseable, Closeable

All Known Implementing Classes:

GenericPartitioningSpiller

public interface PartitioningSpiller
extends Closeable

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	PartitioningSpiller.PartitioningSpillResult

Method Summary

Modifier and Type	Method and Description
void	close() Closes and removes all underlying resources used during spilling.
Iterator<Page>	getSpilledPages(int partition) Returns iterator of previously spilled pages from given partition.
PartitioningSpiller.PartitioningSpillResult	partitionAndSpill(Page page, IntPredicate spillPartitionMask) Partition page and enqueue partitioned pages to spill writers.
void	verifyAllPartitionsRead()

Method Detail

partitionAndSpill

PartitioningSpiller.PartitioningSpillResult partitionAndSpill(Page page,
                                                              IntPredicate spillPartitionMask)

Partition page and enqueue partitioned pages to spill writers. PartitioningSpiller.PartitioningSpillResult.getSpillingFuture() is completed when spilling is finished.

This method may not be called if previously initiated spilling is not finished yet.

getSpilledPages

Iterator<Page> getSpilledPages(int partition)

Returns iterator of previously spilled pages from given partition. Callers are expected to call this method once. Calling multiple times can results in undefined behavior.

This method may not be called if previously initiated spilling is not finished yet.

This method may perform blocking I/O to flush internal buffers.

verifyAllPartitionsRead

void verifyAllPartitionsRead()

close

void close()
    throws IOException

Closes and removes all underlying resources used during spilling.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Throws:

IOException