org.apache.flink.runtime.iterative.task.RuntimeAggregatorRegistry Maven / Gradle / Ivy
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* 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.iterative.task;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import org.apache.flink.api.common.aggregators.Aggregator;
import org.apache.flink.api.common.aggregators.AggregatorWithName;
import org.apache.flink.types.Value;
/**
*
*/
public class RuntimeAggregatorRegistry {
private final Map> aggregators;
private final Map previousGlobalAggregate;
public RuntimeAggregatorRegistry(Collection> aggs) {
this.aggregators = new HashMap>();
this.previousGlobalAggregate = new HashMap();
for (AggregatorWithName agg : aggs) {
this.aggregators.put(agg.getName(), agg.getAggregator());
}
}
public Value getPreviousGlobalAggregate(String name) {
return this.previousGlobalAggregate.get(name);
}
@SuppressWarnings("unchecked")
public > T getAggregator(String name) {
return (T) this.aggregators.get(name);
}
public Map> getAllAggregators() {
return this.aggregators;
}
public void updateGlobalAggregatesAndReset(String[] names, Value[] aggregates) {
if (names == null || aggregates == null || names.length != aggregates.length) {
throw new IllegalArgumentException();
}
// add global aggregates
for (int i = 0 ; i < names.length; i++) {
this.previousGlobalAggregate.put(names[i], aggregates[i]);
}
// reset all aggregators
for (Aggregator agg : this.aggregators.values()) {
agg.reset();
}
}
}