org.apache.flink.runtime.iterative.io.SolutionSetObjectsUpdateOutputCollector Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* 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,
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* See the License for the specific language governing permissions and
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*/
package org.apache.flink.runtime.iterative.io;
import org.apache.flink.api.common.operators.util.JoinHashMap;
import org.apache.flink.api.common.typeutils.TypeSerializer;
import org.apache.flink.util.Collector;
/**
* A {@link Collector} to update the solution set of a workset iteration.
*
* The records are written to a HashTable hash table to allow in-memory point updates.
*
*
Records will only be collected, if there is a match after probing the hash table. If the build side iterator is
* already positioned for the update, use {@link SolutionSetFastUpdateOutputCollector} to the save re-probing.
*
* @see SolutionSetFastUpdateOutputCollector
*/
public class SolutionSetObjectsUpdateOutputCollector implements Collector {
private final Collector delegate;
private final JoinHashMap hashMap;
private final TypeSerializer serializer;
public SolutionSetObjectsUpdateOutputCollector(JoinHashMap hashMap) {
this(hashMap, null);
}
public SolutionSetObjectsUpdateOutputCollector(JoinHashMap hashMap, Collector delegate) {
this.delegate = delegate;
this.hashMap = hashMap;
this.serializer = hashMap.getBuildSerializer();
}
@Override
public void collect(T record) {
T copy = serializer.copy(record);
hashMap.insertOrReplace(copy);
if (delegate != null) {
delegate.collect(record);
}
}
@Override
public void close() {
if (delegate != null) {
delegate.close();
}
}
}