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.runners.core.metrics;
  
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import javax.annotation.Nullable;
  import org.apache.beam.model.pipeline.v1.MetricsApi.MonitoringInfo;
  import org.apache.beam.vendor.grpc.v1p69p0.com.google.protobuf.ByteString;
  
  /**
   * A Class for registering SimpleExecutionStates with and extracting execution time MonitoringInfos.
   */
  @SuppressWarnings({
    "nullness" // TODO(https://github.com/apache/beam/issues/20497)
  })
  public class SimpleStateRegistry {
    private List<SimpleExecutionState> executionStates = new ArrayList<SimpleExecutionState>();
  
    public void register(SimpleExecutionState state) {
      this.executionStates.add(state);
    }
  
    /** Reset the registered SimpleExecutionStates. */
    public void reset() {
      for (SimpleExecutionState state : executionStates) {
        state.reset();
      }
    }
  
    /** @return Execution Time MonitoringInfos based on the tracked start or finish function. */
    public List<MonitoringInfo> getExecutionTimeMonitoringInfos() {
      List<MonitoringInfo> monitoringInfos = new ArrayList<MonitoringInfo>();
      for (SimpleExecutionState state : executionStates) {
        SimpleMonitoringInfoBuilder builder = new SimpleMonitoringInfoBuilder();
        builder.setUrn(state.getUrn());
        for (Map.Entry<String, String> entry : state.getLabels().entrySet()) {
          builder.setLabel(entry.getKey(), entry.getValue());
        }
        builder.setInt64SumValue(state.getTotalMillis());
        monitoringInfos.add(builder.build());
      }
      return monitoringInfos;
    }
  
    public Map<String, ByteString> getExecutionTimeMonitoringData(ShortIdMap shortIds) {
      Map<String, ByteString> result = new HashMap<>(executionStates.size());
      for (SimpleExecutionState state : executionStates) {
        if (state.getTotalMillis() != 0) {
          String shortId = state.getTotalMillisShortId(shortIds);
          result.compute(
              shortId,
              (String k, @Nullable ByteString existing) -> {
                if (existing != null) {
                  // This can happen due to flatten unzipping.
                  return state.mergeTotalMillisPayload(existing);
                } else {
                  return state.getTotalMillisPayload();
                }
              });
        }
      }
      return result;
    }
  }
  