content: /*
   * 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.sdk.extensions.euphoria.core.testkit.accumulators;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.concurrent.ConcurrentHashMap;
  import org.apache.beam.sdk.extensions.euphoria.core.client.accumulators.Histogram;
  
  final class LongHistogram implements Histogram, Snapshotable<Map<Long, Long>> {
  
    final Map<Long, Long> buckets = new ConcurrentHashMap<>();
  
    LongHistogram() {}
  
    @Override
    public void add(long value, long times) {
      buckets.compute(value, (key, count) -> count == null ? times : (count + times));
    }
  
    @Override
    public void add(long value) {
      add(value, 1);
    }
  
    @Override
    public Map<Long, Long> getSnapshot() {
      return new HashMap<>(buckets);
    }
  }
  