org.apache.flink.runtime.io.network.partition.hybrid.index

Interface FileDataIndexSpilledRegionManager<T extends FileDataIndexRegionHelper.Region>

All Superinterfaces:

AutoCloseable

All Known Implementing Classes:

FileDataIndexSpilledRegionManagerImpl

public interface FileDataIndexSpilledRegionManager<T extends FileDataIndexRegionHelper.Region>
extends AutoCloseable

This class is responsible for spilling region to disk and managing these spilled regions.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	FileDataIndexSpilledRegionManager.Factory<T extends FileDataIndexRegionHelper.Region> Factory of FileDataIndexSpilledRegionManager.

Method Summary

Modifier and Type	Method and Description
void	appendOrOverwriteRegion(int subpartition, T region) Write this region to index file.
void	close() Close this spilled region manager.
long	findRegion(int subpartition, int bufferIndex, boolean loadToCache) Find the region contains target bufferIndex and belong to target subpartition.

Method Detail

appendOrOverwriteRegion

void appendOrOverwriteRegion(int subpartition,
                             T region)
                      throws IOException

Write this region to index file. If target region already spilled, overwrite it.

Parameters:

subpartition - the subpartition id of this region.

region - the region to be spilled to index file.

Throws:

IOException

findRegion

long findRegion(int subpartition,
                int bufferIndex,
                boolean loadToCache)

Find the region contains target bufferIndex and belong to target subpartition.

Parameters:

subpartition - the subpartition id that target region belong to.

bufferIndex - the buffer index that target region contains.

loadToCache - whether to load the found region into the cache.

Returns:

if target region can be founded, return it's offset in index file. Otherwise, return -1.

close

void close()
    throws IOException

Close this spilled region manager.

Specified by:

close in interface AutoCloseable

Throws:

IOException