org.apache.flink.runtime.operators.sort.DefaultInMemorySorterFactory Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.flink.runtime.operators.sort;
import org.apache.flink.api.common.typeutils.TypeComparator;
import org.apache.flink.api.common.typeutils.TypeSerializer;
import org.apache.flink.api.common.typeutils.TypeSerializerFactory;
import org.apache.flink.core.memory.MemorySegment;
import javax.annotation.Nonnull;
import java.util.List;
/**
* Default factory for {@link InMemorySorter}.
*/
public class DefaultInMemorySorterFactory implements InMemorySorterFactory {
@Nonnull
private final TypeSerializerFactory typeSerializerFactory;
@Nonnull
private final TypeComparator typeComparator;
private final boolean useFixedLengthRecordSorter;
DefaultInMemorySorterFactory(
@Nonnull TypeSerializerFactory typeSerializerFactory,
@Nonnull TypeComparator typeComparator,
int thresholdForInPlaceSorting) {
this.typeSerializerFactory = typeSerializerFactory;
this.typeComparator = typeComparator;
TypeSerializer typeSerializer = typeSerializerFactory.getSerializer();
this.useFixedLengthRecordSorter = typeComparator.supportsSerializationWithKeyNormalization() &&
typeSerializer.getLength() > 0 && typeSerializer.getLength() <= thresholdForInPlaceSorting;
}
@Override
public InMemorySorter create(List sortSegments) {
final TypeSerializer typeSerializer = typeSerializerFactory.getSerializer();
final TypeComparator duplicateTypeComparator = typeComparator.duplicate();
if (useFixedLengthRecordSorter) {
return new FixedLengthRecordSorter<>(typeSerializer, duplicateTypeComparator, sortSegments);
} else {
return new NormalizedKeySorter<>(typeSerializer, duplicateTypeComparator, sortSegments);
}
}
}