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

Class ReduceIndexIterator

java.lang.Object

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

All Implemented Interfaces:

AutoCloseable, Iterator<List<?>>

public class ReduceIndexIterator
extends Object
implements Iterator<List<?>>, AutoCloseable

Iterator that transparently and sequentially traverses a bunch of AbstractReduceIndexAdapter objects.

Constructor Summary

Constructors

Constructor and Description
ReduceIndexIterator(GridReduceQueryExecutor rdcExec, Collection<ClusterNode> nodes, ReduceQueryRun run, long qryReqId, boolean distributedJoins, @Nullable MvccQueryTracker mvccTracker, Tracing tracing) Constructor.

Method Summary

Modifier and Type	Method and Description
void	close()
boolean	hasNext()
List<?>	next()
void	remove()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Detail

ReduceIndexIterator

public ReduceIndexIterator(GridReduceQueryExecutor rdcExec,
                           Collection<ClusterNode> nodes,
                           ReduceQueryRun run,
                           long qryReqId,
                           boolean distributedJoins,
                           @Nullable
                           @Nullable MvccQueryTracker mvccTracker,
                           Tracing tracing)

Constructor.

Parameters:

rdcExec - Reduce query executor.

nodes - Participating nodes.

run - Query run.

qryReqId - Query request ID.

distributedJoins - Distributed joins.

tracing - Tracing processor.

Method Detail

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<List<?>>

next

public List<?> next()

Specified by:

next in interface Iterator<List<?>>

remove

public void remove()

Specified by:

remove in interface Iterator<List<?>>

close

public void close()
           throws Exception

Specified by:

close in interface AutoCloseable

Throws:

Exception