com.facebook.presto.spiller

Class FileSingleStreamSpiller

java.lang.Object

com.facebook.presto.spiller.FileSingleStreamSpiller

All Implemented Interfaces:

SingleStreamSpiller, Closeable, AutoCloseable

@NotThreadSafe
public class FileSingleStreamSpiller
extends Object
implements SingleStreamSpiller

Constructor Summary

Constructors

Constructor and Description
FileSingleStreamSpiller(PagesSerde serde, com.google.common.util.concurrent.ListeningExecutorService executor, Path spillPath, SpillerStats spillerStats, SpillContext spillContext, LocalMemoryContext memoryContext, Optional<SpillCipher> spillCipher)

Method Summary

Modifier and Type	Method and Description
void	close() Close releases/removes all underlying resources used during spilling like for example all created temporary files.
void	commit() Commit the spill file.
com.google.common.util.concurrent.ListenableFuture<List<Page>>	getAllSpilledPages() Initiates read of previously spilled pages.
Iterator<Page>	getSpilledPages() Returns list of previously spilled Pages as a single stream.
long	getSpilledPagesInMemorySize() Returns estimate size of pages that would be returned by SingleStreamSpiller.getAllSpilledPages().
com.google.common.util.concurrent.ListenableFuture<?>	spill(Iterator<Page> pageIterator) Initiate spilling of pages stream.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.facebook.presto.spiller.SingleStreamSpiller

spill

Constructor Detail

FileSingleStreamSpiller

public FileSingleStreamSpiller(PagesSerde serde,
                               com.google.common.util.concurrent.ListeningExecutorService executor,
                               Path spillPath,
                               SpillerStats spillerStats,
                               SpillContext spillContext,
                               LocalMemoryContext memoryContext,
                               Optional<SpillCipher> spillCipher)

Method Detail

spill

public com.google.common.util.concurrent.ListenableFuture<?> spill(Iterator<Page> pageIterator)

Description copied from interface: SingleStreamSpiller

Initiate spilling of pages stream. Returns completed future once spilling has finished. Next spill can be initiated as soon as previous one completes.

Specified by:

spill in interface SingleStreamSpiller

getSpilledPagesInMemorySize

public long getSpilledPagesInMemorySize()

Description copied from interface: SingleStreamSpiller

Returns estimate size of pages that would be returned by SingleStreamSpiller.getAllSpilledPages().

Specified by:

getSpilledPagesInMemorySize in interface SingleStreamSpiller

getSpilledPages

public Iterator<Page> getSpilledPages()

Description copied from interface: SingleStreamSpiller

Returns list of previously spilled Pages as a single stream. Commits the spill file automatically if not committed. Pages are in the same order as they were spilled. Method requires the issued spill request to be completed.

Specified by:

getSpilledPages in interface SingleStreamSpiller

getAllSpilledPages

public com.google.common.util.concurrent.ListenableFuture<List<Page>> getAllSpilledPages()

Description copied from interface: SingleStreamSpiller

Initiates read of previously spilled pages. Commits the spill file automatically if not committed The returned Future will be complete once all pages are read.

Specified by:

getAllSpilledPages in interface SingleStreamSpiller

commit

public void commit()

Description copied from interface: SingleStreamSpiller

Commit the spill file. Once committed, the spill file can no longer be modified If the spill file is already committed, invoking this method has no effect

Specified by:

commit in interface SingleStreamSpiller

close

public void close()

Description copied from interface: SingleStreamSpiller

Close releases/removes all underlying resources used during spilling like for example all created temporary files.

Specified by:

close in interface SingleStreamSpiller

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable