io.prestosql.operator

Class PagesSpatialIndexFactory

java.lang.Object

io.prestosql.operator.PagesSpatialIndexFactory

@ThreadSafe
public class PagesSpatialIndexFactory
extends Object

This factory is used to pass spatial index built by SpatialIndexBuilderOperator to SpatialJoinOperators.

SpatialIndexBuilderOperator creates a spatial index Supplier and provides it to this factory by calling lendPagesSpatialIndex(Supplier).

SpatialJoinOperators call createPagesSpatialIndex() to get a Future that will provide an instance of the spatial index when done. The Supplier is used to create separate instances of an index for each SpatialJoinOperator. All these instances share the index of geometries on the build side, but have their own instances of an optional extra potentially stateful filter function.

SpatialIndexBuilderOperator is responsible for keeping track of how much memory is used by the index shared among SpatialJoinOperators. To do so SpatialIndexBuilderOperator has to stay active until all the SpatialJoinOperators have finished.

lendPagesSpatialIndex(Supplier) returns a Future that completes once all the SpatialJoinOperators completed. SpatialIndexBuilderOperator uses that Future to decide on its own completion.

Constructor Summary

Constructors

Constructor and Description
PagesSpatialIndexFactory(List<Type> types, List<Type> outputTypes)

Method Summary

Modifier and Type	Method and Description
com.google.common.util.concurrent.ListenableFuture<PagesSpatialIndex>	createPagesSpatialIndex() Called by SpatialJoinOperator.
void	destroy()
List<Type>	getOutputTypes()
List<Type>	getTypes()
com.google.common.util.concurrent.ListenableFuture<?>	lendPagesSpatialIndex(Supplier<PagesSpatialIndex> pagesSpatialIndex) Called by SpatialIndexBuilderOperator to provide a Supplier of spatial indexes for SpatialJoinOperators to use.

Methods inherited from class java.lang.Object

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

Constructor Detail

PagesSpatialIndexFactory

public PagesSpatialIndexFactory(List<Type> types,
                                List<Type> outputTypes)

Method Detail

getTypes

public List<Type> getTypes()

getOutputTypes

public List<Type> getOutputTypes()

destroy

public void destroy()

createPagesSpatialIndex

public com.google.common.util.concurrent.ListenableFuture<PagesSpatialIndex> createPagesSpatialIndex()

Called by SpatialJoinOperator.

lendPagesSpatialIndex

public com.google.common.util.concurrent.ListenableFuture<?> lendPagesSpatialIndex(Supplier<PagesSpatialIndex> pagesSpatialIndex)

Called by SpatialIndexBuilderOperator to provide a Supplier of spatial indexes for SpatialJoinOperators to use.

Returns a Future that completes once all the SpatialJoinOperators have completed.