Package com.illumon.iris.db.v2.updateby.hashing

Class UpdateBySlotTracker

java.lang.Object

com.illumon.iris.db.v2.updateby.hashing.UpdateBySlotTracker

public class UpdateBySlotTracker
extends Object

This class tracks indices by individual bucket. During an update cycle it also provides a means to accumulate updates to each bucket so that they can be processed on a per-bucket basis.

Accumulation of bucketed changes is done by assigning a cookie, incrementally, to each visited bucket. The cookie can be then used to retrieve the changes to that bucket which lets the update use space proportional to the number of visited buckets in the update, instead of the total number of buckets in the table.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	UpdateBySlotTracker.ModifiedSlotConsumer
static class	UpdateBySlotTracker.UpdateTracker

Constructor Summary

Constructors

Constructor	Description
UpdateBySlotTracker(int chunkSize)

Method Summary

Modifier and Type	Method	Description
void	addToBucket(int slot, long keyToAdd)
void	addToBucket(int slot, LongChunk<? extends Attributes.KeyIndices> addedChunk, int startPos, int length)	Add a slot in the main table.
ReadOnlyIndex	applyUpdates(IndexShiftData shiftsToApply)
void	forAllModifiedSlots(UpdateBySlotTracker.ModifiedSlotConsumer slotConsumer)	For each value, call slotConsumer.
long	getModifiedBucketCount()
UpdateBySlotTracker.UpdateTracker	getTracker(int slot)
void	markForShift(int slot)
void	modifyBucket(int slot, long modifiedKey)
void	modifyBucket(int slot, LongChunk<? extends Attributes.KeyIndices> modifiedChunk, int startPos, int length)
void	removeFromBucket(int slot, long removedKey)
void	removeFromBucket(int slot, LongChunk<? extends Attributes.KeyIndices> removedChunk, int startPos, int length)
void	reset()	Remove all entries from the tracker.

Methods inherited from class java.lang.Object

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

Constructor Details

UpdateBySlotTracker

public UpdateBySlotTracker(int chunkSize)

Method Details

getModifiedBucketCount

public long getModifiedBucketCount()

reset

public void reset()

Remove all entries from the tracker.

applyUpdates

@NotNull public ReadOnlyIndex applyUpdates(@NotNull IndexShiftData shiftsToApply)

forAllModifiedSlots

public void forAllModifiedSlots(@NotNull UpdateBySlotTracker.ModifiedSlotConsumer slotConsumer)

For each value, call slotConsumer.

Parameters:

slotConsumer - the consumer of our values

addToBucket

public void addToBucket(int slot, @NotNull LongChunk<? extends Attributes.KeyIndices> addedChunk, int startPos, int length)

Add a slot in the main table.

Parameters:

slot - the slot to add.

addToBucket

public void addToBucket(int slot, long keyToAdd)

modifyBucket

public void modifyBucket(int slot, @NotNull LongChunk<? extends Attributes.KeyIndices> modifiedChunk, int startPos, int length)

modifyBucket

public void modifyBucket(int slot, long modifiedKey)

removeFromBucket

public void removeFromBucket(int slot, @NotNull LongChunk<? extends Attributes.KeyIndices> removedChunk, int startPos, int length)

removeFromBucket

public void removeFromBucket(int slot, long removedKey)

markForShift

public void markForShift(int slot)

getTracker

public UpdateBySlotTracker.UpdateTracker getTracker(int slot)