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

Class DataIndexProviderImpl

java.lang.Object

com.illumon.iris.db.v2.dataindex.DataIndexProviderImpl

All Implemented Interfaces:

DataIndexProvider

@InternalUseOnly
public class DataIndexProviderImpl
extends Object
implements DataIndexProvider

This class provides data indexes for merged tables. It is responsible for ensuring that the provided table accounts for the relative positions of individual table locations in the provided table of indices.

Much like the GroupingProvider implementations, this also attempts to defer any actual disk accesses until they are absolutely necessary.

ImplNote:

This is an experimental feature, it is likely to change.

Constructor Summary

Constructors

Constructor	Description
DataIndexProviderImpl()

Method Summary

Modifier and Type	Method	Description
void	addLocation(TableLocation location, long firstKey)	Add a single location to be tracked by the dataIndexProvider.
static ReadOnlyIndex	combineIndices(DbArray<? extends ReadOnlyIndex> arr)
Table	getDataIndex(String... columns)	Get the data index for the specified set of key columns.

Methods inherited from class java.lang.Object

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

Constructor Details

DataIndexProviderImpl

public DataIndexProviderImpl()

Method Details

addLocation

public void addLocation(TableLocation location,
 long firstKey)

Add a single location to be tracked by the dataIndexProvider. The firstKey will be used to ensure that any retrieved dataIndexes are properly shifted into the key space for each location.

Parameters:

location - the location to add

firstKey - the first key in the location.

getDataIndex

@Nullable
public Table getDataIndex(@NotNull
 String... columns)

Description copied from interface: DataIndexProvider

Get the data index for the specified set of key columns.

Specified by:

getDataIndex in interface DataIndexProvider

Parameters:

columns - the key columns

Returns:

the data index table, or null if one was not available.

combineIndices

public static ReadOnlyIndex combineIndices(DbArray<? extends ReadOnlyIndex> arr)