io.prestosql.spiller

Class GenericPartitioningSpiller

java.lang.Object

io.prestosql.spiller.GenericPartitioningSpiller

All Implemented Interfaces:

PartitioningSpiller, Closeable, AutoCloseable

@ThreadSafe
public class GenericPartitioningSpiller
extends Object
implements PartitioningSpiller

Nested Class Summary

Nested classes/interfaces inherited from interface io.prestosql.spiller.PartitioningSpiller

PartitioningSpiller.PartitioningSpillResult

Constructor Summary

Constructors

Constructor and Description
GenericPartitioningSpiller(List<Type> types, PartitionFunction partitionFunction, SpillContext spillContext, AggregatedMemoryContext memoryContext, SingleStreamSpillerFactory spillerFactory)

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()

Methods inherited from class java.lang.Object

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

Constructor Detail

GenericPartitioningSpiller

public GenericPartitioningSpiller(List<Type> types,
                                  PartitionFunction partitionFunction,
                                  SpillContext spillContext,
                                  AggregatedMemoryContext memoryContext,
                                  SingleStreamSpillerFactory spillerFactory)

Method Detail

getSpilledPages

public Iterator<Page> getSpilledPages(int partition)

Description copied from interface: PartitioningSpiller

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.

Specified by:

getSpilledPages in interface PartitioningSpiller

verifyAllPartitionsRead

public void verifyAllPartitionsRead()

Specified by:

verifyAllPartitionsRead in interface PartitioningSpiller

partitionAndSpill

public PartitioningSpiller.PartitioningSpillResult partitionAndSpill(Page page,
                                                                     IntPredicate spillPartitionMask)

Description copied from interface: PartitioningSpiller

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.

Specified by:

partitionAndSpill in interface PartitioningSpiller

close

public void close()
           throws IOException

Description copied from interface: PartitioningSpiller

Closes and removes all underlying resources used during spilling.

Specified by:

close in interface PartitioningSpiller

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException