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.metrics;
  
  import java.io.Serializable;
  import org.apache.beam.sdk.annotations.Internal;
  
  /**
   * Implementation of {@link Distribution} that delegates to the instance for the current context.
   */
  @Internal
  public class DelegatingDistribution implements Metric, Distribution, Serializable {
    private final MetricName name;
    private final boolean processWideContainer;
  
    public DelegatingDistribution(MetricName name) {
      this(name, false);
    }
  
    public DelegatingDistribution(MetricName name, boolean processWideContainer) {
      this.name = name;
      this.processWideContainer = processWideContainer;
    }
  
    @Override
    public void update(long value) {
      MetricsContainer container =
          this.processWideContainer
              ? MetricsEnvironment.getProcessWideContainer()
              : MetricsEnvironment.getCurrentContainer();
      if (container != null) {
        container.getDistribution(name).update(value);
      }
    }
  
    @Override
    public void update(long sum, long count, long min, long max) {
      MetricsContainer container =
          this.processWideContainer
              ? MetricsEnvironment.getProcessWideContainer()
              : MetricsEnvironment.getCurrentContainer();
      if (container != null) {
        container.getDistribution(name).update(sum, count, min, max);
      }
    }
  
    @Override
    public MetricName getName() {
      return name;
    }
  }
  