org.apache.flink.runtime.operators.AbstractCachedBuildSideJoinDriver Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
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package org.apache.flink.runtime.operators;
import org.apache.flink.api.common.ExecutionConfig;
import org.apache.flink.api.common.functions.FlatJoinFunction;
import org.apache.flink.api.common.typeutils.TypeComparator;
import org.apache.flink.api.common.typeutils.TypePairComparatorFactory;
import org.apache.flink.api.common.typeutils.TypeSerializer;
import org.apache.flink.configuration.AlgorithmOptions;
import org.apache.flink.metrics.Counter;
import org.apache.flink.runtime.operators.hash.NonReusingBuildFirstReOpenableHashJoinIterator;
import org.apache.flink.runtime.operators.hash.NonReusingBuildSecondReOpenableHashJoinIterator;
import org.apache.flink.runtime.operators.hash.ReusingBuildFirstReOpenableHashJoinIterator;
import org.apache.flink.runtime.operators.hash.ReusingBuildSecondReOpenableHashJoinIterator;
import org.apache.flink.runtime.operators.util.JoinTaskIterator;
import org.apache.flink.runtime.operators.util.TaskConfig;
import org.apache.flink.runtime.operators.util.metrics.CountingCollector;
import org.apache.flink.runtime.operators.util.metrics.CountingMutableObjectIterator;
import org.apache.flink.util.Collector;
import org.apache.flink.util.MutableObjectIterator;
public abstract class AbstractCachedBuildSideJoinDriver
extends JoinDriver
implements ResettableDriver, OT> {
private volatile JoinTaskIterator matchIterator;
private final int buildSideIndex;
private final int probeSideIndex;
private boolean objectReuseEnabled = false;
protected AbstractCachedBuildSideJoinDriver(int buildSideIndex, int probeSideIndex) {
this.buildSideIndex = buildSideIndex;
this.probeSideIndex = probeSideIndex;
}
// --------------------------------------------------------------------------------------------
@Override
public boolean isInputResettable(int inputNum) {
if (inputNum < 0 || inputNum > 1) {
throw new IndexOutOfBoundsException();
}
return inputNum == buildSideIndex;
}
@Override
public void initialize() throws Exception {
TaskConfig config = this.taskContext.getTaskConfig();
final Counter numRecordsIn =
taskContext.getMetricGroup().getIOMetricGroup().getNumRecordsInCounter();
TypeSerializer serializer1 =
this.taskContext.getInputSerializer(0).getSerializer();
TypeSerializer serializer2 =
this.taskContext.getInputSerializer(1).getSerializer();
TypeComparator comparator1 = this.taskContext.getDriverComparator(0);
TypeComparator comparator2 = this.taskContext.getDriverComparator(1);
MutableObjectIterator input1 =
new CountingMutableObjectIterator<>(
this.taskContext.getInput(0), numRecordsIn);
MutableObjectIterator input2 =
new CountingMutableObjectIterator<>(
this.taskContext.getInput(1), numRecordsIn);
TypePairComparatorFactory pairComparatorFactory =
this.taskContext
.getTaskConfig()
.getPairComparatorFactory(this.taskContext.getUserCodeClassLoader());
double availableMemory = config.getRelativeMemoryDriver();
boolean hashJoinUseBitMaps =
taskContext
.getTaskManagerInfo()
.getConfiguration()
.getBoolean(AlgorithmOptions.HASH_JOIN_BLOOM_FILTERS);
ExecutionConfig executionConfig = taskContext.getExecutionConfig();
objectReuseEnabled = executionConfig.isObjectReuseEnabled();
if (objectReuseEnabled) {
if (buildSideIndex == 0 && probeSideIndex == 1) {
matchIterator =
new ReusingBuildFirstReOpenableHashJoinIterator(
input1,
input2,
serializer1,
comparator1,
serializer2,
comparator2,
pairComparatorFactory.createComparator21(comparator1, comparator2),
this.taskContext.getMemoryManager(),
this.taskContext.getIOManager(),
this.taskContext.getContainingTask(),
availableMemory,
false,
false,
hashJoinUseBitMaps);
} else if (buildSideIndex == 1 && probeSideIndex == 0) {
matchIterator =
new ReusingBuildSecondReOpenableHashJoinIterator(
input1,
input2,
serializer1,
comparator1,
serializer2,
comparator2,
pairComparatorFactory.createComparator12(comparator1, comparator2),
this.taskContext.getMemoryManager(),
this.taskContext.getIOManager(),
this.taskContext.getContainingTask(),
availableMemory,
false,
false,
hashJoinUseBitMaps);
} else {
throw new Exception("Error: Inconsistent setup for repeatable hash join driver.");
}
} else {
if (buildSideIndex == 0 && probeSideIndex == 1) {
matchIterator =
new NonReusingBuildFirstReOpenableHashJoinIterator(
input1,
input2,
serializer1,
comparator1,
serializer2,
comparator2,
pairComparatorFactory.createComparator21(comparator1, comparator2),
this.taskContext.getMemoryManager(),
this.taskContext.getIOManager(),
this.taskContext.getContainingTask(),
availableMemory,
false,
false,
hashJoinUseBitMaps);
} else if (buildSideIndex == 1 && probeSideIndex == 0) {
matchIterator =
new NonReusingBuildSecondReOpenableHashJoinIterator(
input1,
input2,
serializer1,
comparator1,
serializer2,
comparator2,
pairComparatorFactory.createComparator12(comparator1, comparator2),
this.taskContext.getMemoryManager(),
this.taskContext.getIOManager(),
this.taskContext.getContainingTask(),
availableMemory,
false,
false,
hashJoinUseBitMaps);
} else {
throw new Exception("Error: Inconsistent setup for repeatable hash join driver.");
}
}
this.matchIterator.open();
}
@Override
public void prepare() throws Exception {
// nothing
}
@Override
public void run() throws Exception {
final Counter numRecordsOut =
taskContext.getMetricGroup().getIOMetricGroup().getNumRecordsOutCounter();
final FlatJoinFunction matchStub = this.taskContext.getStub();
final Collector collector =
new CountingCollector<>(this.taskContext.getOutputCollector(), numRecordsOut);
while (this.running
&& matchIterator != null
&& matchIterator.callWithNextKey(matchStub, collector)) {}
}
@Override
public void cleanup() throws Exception {}
@Override
public void reset() throws Exception {
MutableObjectIterator input1 = this.taskContext.getInput(0);
MutableObjectIterator input2 = this.taskContext.getInput(1);
if (objectReuseEnabled) {
if (buildSideIndex == 0 && probeSideIndex == 1) {
final ReusingBuildFirstReOpenableHashJoinIterator matchIterator =
(ReusingBuildFirstReOpenableHashJoinIterator)
this.matchIterator;
matchIterator.reopenProbe(input2);
} else {
final ReusingBuildSecondReOpenableHashJoinIterator matchIterator =
(ReusingBuildSecondReOpenableHashJoinIterator)
this.matchIterator;
matchIterator.reopenProbe(input1);
}
} else {
if (buildSideIndex == 0 && probeSideIndex == 1) {
final NonReusingBuildFirstReOpenableHashJoinIterator matchIterator =
(NonReusingBuildFirstReOpenableHashJoinIterator)
this.matchIterator;
matchIterator.reopenProbe(input2);
} else {
final NonReusingBuildSecondReOpenableHashJoinIterator matchIterator =
(NonReusingBuildSecondReOpenableHashJoinIterator)
this.matchIterator;
matchIterator.reopenProbe(input1);
}
}
}
@Override
public void teardown() {
this.running = false;
if (this.matchIterator != null) {
this.matchIterator.close();
}
}
@Override
public void cancel() {
this.running = false;
if (this.matchIterator != null) {
this.matchIterator.abort();
}
}
}
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