org.apache.flink.runtime.operators.hash

Class ReOpenableMutableHashTable<BT,PT>

java.lang.Object

org.apache.flink.runtime.operators.hash.MutableHashTable<BT,PT>

org.apache.flink.runtime.operators.hash.ReOpenableMutableHashTable<BT,PT>

All Implemented Interfaces:

MemorySegmentSource

public class ReOpenableMutableHashTable<BT,PT>
extends MutableHashTable<BT,PT>

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.runtime.operators.hash.MutableHashTable

MutableHashTable.HashBucketIterator<BT,PT>, MutableHashTable.ProbeIterator<PT>, MutableHashTable.UnmatchedBuildIterator<BT,PT>

Field Summary

Fields inherited from class org.apache.flink.runtime.operators.hash.MutableHashTable

availableMemory, buckets, bucketsPerSegmentBits, bucketsPerSegmentMask, buildSideComparator, buildSideSerializer, closed, currentEnumerator, currentRecursionDepth, furtherPartitioning, ioManager, keepBuildSidePartitions, numBuckets, partitionsBeingBuilt, probeIterator, probeSideSerializer, segmentSize, writeBehindBuffers, writeBehindBuffersAvailable

Constructor Summary

Constructors

Constructor and Description
ReOpenableMutableHashTable(TypeSerializer<BT> buildSideSerializer, TypeSerializer<PT> probeSideSerializer, TypeComparator<BT> buildSideComparator, TypeComparator<PT> probeSideComparator, TypePairComparator<PT,BT> comparator, List<MemorySegment> memorySegments, IOManager ioManager, boolean useBitmapFilters)

Method Summary

Modifier and Type	Method and Description
void	close() Closes the hash table.
protected HashPartition<BT,PT>	getNewInMemoryPartition(int number, int recursionLevel) Returns a new inMemoryPartition object.
void	open(MutableObjectIterator<BT> buildSide, MutableObjectIterator<PT> probeSide, boolean buildSideOuterJoin) Opens the hash join.
protected boolean	prepareNextPartition()
protected void	releaseTable() Releases the table (the array of buckets) and returns the occupied memory segments to the list of free segments.
void	reopenProbe(MutableObjectIterator<PT> probeInput)

Methods inherited from class org.apache.flink.runtime.operators.hash.MutableHashTable

abort, assignPartition, buildBloomFilterForBucketsInPartition, buildInitialTable, buildTableFromSpilledPartition, clearPartitions, createPartitions, getBuildSideIterator, getCurrentProbeRecord, getFreedMemory, getInitialTableSize, getMatchesFor, getNumWriteBehindBuffers, getPartitioningFanOutNoEstimates, getProbeSideComparator, hash, initTable, insertIntoTable, nextRecord, nextSegment, open, processProbeIter, processUnmatchedBuildIter, spillPartition

Methods inherited from class java.lang.Object

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

Constructor Detail

ReOpenableMutableHashTable

public ReOpenableMutableHashTable(TypeSerializer<BT> buildSideSerializer,
                                  TypeSerializer<PT> probeSideSerializer,
                                  TypeComparator<BT> buildSideComparator,
                                  TypeComparator<PT> probeSideComparator,
                                  TypePairComparator<PT,BT> comparator,
                                  List<MemorySegment> memorySegments,
                                  IOManager ioManager,
                                  boolean useBitmapFilters)

Method Detail

open

public void open(MutableObjectIterator<BT> buildSide,
                 MutableObjectIterator<PT> probeSide,
                 boolean buildSideOuterJoin)
          throws IOException

Description copied from class: MutableHashTable

Opens the hash join. This method reads the build-side input and constructs the initial hash table, gradually spilling partitions that do not fit into memory.

Overrides:

open in class MutableHashTable<BT,PT>

Parameters:

buildSide - Build side input.

probeSide - Probe side input.

buildSideOuterJoin - Whether outer join on build side.

Throws:

IOException - Thrown, if an I/O problem occurs while spilling a partition.

reopenProbe

public void reopenProbe(MutableObjectIterator<PT> probeInput)
                 throws IOException

Throws:

IOException

prepareNextPartition

protected boolean prepareNextPartition()
                                throws IOException

Overrides:

prepareNextPartition in class MutableHashTable<BT,PT>

Throws:

IOException

releaseTable

protected void releaseTable()

Description copied from class: MutableHashTable

Releases the table (the array of buckets) and returns the occupied memory segments to the list of free segments.

Overrides:

releaseTable in class MutableHashTable<BT,PT>

getNewInMemoryPartition

protected HashPartition<BT,PT> getNewInMemoryPartition(int number,
                                                       int recursionLevel)

Description copied from class: MutableHashTable

Returns a new inMemoryPartition object. This is required as a plug for ReOpenableMutableHashTable.

Overrides:

getNewInMemoryPartition in class MutableHashTable<BT,PT>

close

public void close()

Description copied from class: MutableHashTable

Closes the hash table. This effectively releases all internal structures and closes all open files and removes them. The call to this method is valid both as a cleanup after the complete inputs were properly processed, and as an cancellation call, which cleans up all resources that are currently held by the hash join.

Overrides:

close in class MutableHashTable<BT,PT>