| /* |
| * 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.beam.runners.dataflow.worker.counters; |
| |
| import static org.apache.beam.runners.dataflow.worker.counters.DataflowCounterUpdateExtractor.longToSplitInt; |
| import static org.apache.beam.runners.dataflow.worker.counters.DataflowCounterUpdateExtractor.splitIntToLong; |
| |
| import com.google.api.services.dataflow.model.CounterUpdate; |
| import java.util.List; |
| |
| public class SumCounterUpdateAggregator implements CounterUpdateAggregator { |
| |
| @Override |
| public CounterUpdate aggregate(List<CounterUpdate> counterUpdates) { |
| if (counterUpdates == null || counterUpdates.isEmpty()) { |
| return null; |
| } |
| if (counterUpdates.stream().anyMatch(c -> c.getInteger() == null)) { |
| throw new UnsupportedOperationException( |
| "Aggregating SUM counter updates over non-integer type is not implemented."); |
| } |
| |
| CounterUpdate initial = counterUpdates.remove(0); |
| return counterUpdates.stream() |
| .reduce( |
| initial, |
| (first, second) -> |
| first.setInteger( |
| longToSplitInt( |
| splitIntToLong(first.getInteger()) + splitIntToLong(second.getInteger())))); |
| } |
| } |