/*
* 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.hash;
import org.apache.flink.api.common.typeutils.TypeComparator;
import org.apache.flink.api.common.typeutils.TypePairComparator;
import org.apache.flink.api.common.typeutils.TypeSerializer;
import org.apache.flink.core.memory.MemorySegment;
import org.apache.flink.runtime.io.disk.iomanager.IOManager;
import org.apache.flink.runtime.jobgraph.tasks.AbstractInvokable;
import org.apache.flink.runtime.memory.MemoryAllocationException;
import org.apache.flink.runtime.memory.MemoryManager;
import java.util.List;
/**
* Common methods for all Hash Join Iterators.
*/
public class HashJoinIteratorBase {
public <BT, PT> MutableHashTable<BT, PT> getHashJoin(
TypeSerializer<BT> buildSideSerializer,
TypeComparator<BT> buildSideComparator,
TypeSerializer<PT> probeSideSerializer,
TypeComparator<PT> probeSideComparator,
TypePairComparator<PT, BT> pairComparator,
MemoryManager memManager,
IOManager ioManager,
AbstractInvokable ownerTask,
double memoryFraction,
boolean useBloomFilters) throws MemoryAllocationException {
final int numPages = memManager.computeNumberOfPages(memoryFraction);
final List<MemorySegment> memorySegments = memManager.allocatePages(ownerTask, numPages);
return new MutableHashTable<BT, PT>(buildSideSerializer, probeSideSerializer,
buildSideComparator, probeSideComparator, pairComparator,
memorySegments, ioManager,
useBloomFilters);
}
}