Package com.illumon.iris.db.v2.dataindex

Class MemoizingGroupingProvider

java.lang.Object

com.illumon.iris.db.v2.dataindex.MemoizingGroupingProvider

All Implemented Interfaces:

GroupingProvider

Direct Known Subclasses:

DiskBackedDeferredGroupingProvider, PartitionColumnGroupingProvider, StaticGroupingProvider

public abstract class MemoizingGroupingProvider
extends Object
implements GroupingProvider

A base GroupingProvider that supports memoization.

Constructor Summary

Constructors

Constructor	Description
MemoizingGroupingProvider()

Method Summary

Modifier and Type	Method	Description
void	clearMemoizedGroupings()	Clear all memoized groupings.
protected Table	memoizeGrouping(GroupingMemoKey memoKey, Supplier<Table> groupingFactory)	Get the memoized grouping, or compute it if none existed.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.illumon.iris.db.v2.locations.GroupingProvider

getGroupingBuilder, hasGrouping, hasGrouping

Constructor Details

MemoizingGroupingProvider

public MemoizingGroupingProvider()

Method Details

memoizeGrouping

@Nullable
protected Table memoizeGrouping(@Nullable
 GroupingMemoKey memoKey,
 @NotNull
 Supplier<Table> groupingFactory)

Get the memoized grouping, or compute it if none existed.

Parameters:

memoKey - the memo key, or null if memoization is not allowed.

groupingFactory - the method to create the grouping

Returns:

the resultant grouping.

clearMemoizedGroupings

public void clearMemoizedGroupings()

Clear all memoized groupings.