org.apache.ignite.internal.processors.query.h2.twostep

Class UnsortedBaseReducer

java.lang.Object

org.apache.ignite.internal.processors.query.h2.twostep.AbstractReducer

org.apache.ignite.internal.processors.query.h2.twostep.UnsortedBaseReducer

All Implemented Interfaces:

Reducer

Direct Known Subclasses:

UnsortedOneWayReducer, UnsortedReducer

public abstract class UnsortedBaseReducer
extends AbstractReducer

Base unsorted merge index.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.ignite.internal.processors.query.h2.twostep.Reducer

Reducer.RowComparator

Field Summary

Fields

Modifier and Type	Field and Description
protected AtomicInteger	activeSourcesCnt
protected Iterator<org.h2.value.Value[]>	iter
protected org.apache.ignite.internal.processors.query.h2.twostep.UnsortedBaseReducer.PollableQueue<ReduceResultPage>	queue

Fields inherited from class org.apache.ignite.internal.processors.query.h2.twostep.AbstractReducer

fetched, srcNodes

Constructor Summary

Constructors

Constructor and Description
UnsortedBaseReducer(GridKernalContext ctx) Constructor.

Method Summary

Modifier and Type	Method and Description
protected void	addPage0(ReduceResultPage page)
boolean	fetchedAll() Check if all rows has been fetched from all sources.
protected org.h2.index.Cursor	findAllFetched(List<org.h2.result.Row> fetched, @Nullable org.h2.result.SearchRow first, @Nullable org.h2.result.SearchRow last)
void	setSources(Map<ClusterNode,BitSet> nodesToSegmentsCnt) Set source nodes.

Methods inherited from class org.apache.ignite.internal.processors.query.h2.twostep.AbstractReducer

addPage, checkBounds, createDummyLastPage, fail, find, findInStream, hasSource, onBlockEvict, onFailure, pollNextIterator, setPageSize, sources

Methods inherited from class java.lang.Object

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

Field Detail

activeSourcesCnt

protected final AtomicInteger activeSourcesCnt

queue

protected final org.apache.ignite.internal.processors.query.h2.twostep.UnsortedBaseReducer.PollableQueue<ReduceResultPage> queue

iter

protected Iterator<org.h2.value.Value[]> iter

Constructor Detail

UnsortedBaseReducer

public UnsortedBaseReducer(GridKernalContext ctx)

Constructor.

Parameters:

ctx - Context.

Method Detail

setSources

public void setSources(Map<ClusterNode,BitSet> nodesToSegmentsCnt)

Set source nodes.

Specified by:

setSources in interface Reducer

Overrides:

setSources in class AbstractReducer

Parameters:

nodesToSegmentsCnt - Mapping of nodes to expected count of segments to scan.

fetchedAll

public boolean fetchedAll()

Check if all rows has been fetched from all sources.

Returns:

true If all rows has been fetched, false otherwise.

addPage0

protected void addPage0(ReduceResultPage page)

Specified by:

addPage0 in class AbstractReducer

Parameters:

page - Page.

findAllFetched

protected org.h2.index.Cursor findAllFetched(List<org.h2.result.Row> fetched,
                                             @Nullable
                                             @Nullable org.h2.result.SearchRow first,
                                             @Nullable
                                             @Nullable org.h2.result.SearchRow last)

Specified by:

findAllFetched in class AbstractReducer

Parameters:

fetched - Fetched data.

first - Row.

last - Row.

Returns:

Cursor over fetched data.