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.flink;
  
  import static org.apache.beam.runners.core.metrics.MetricsContainerStepMap.asAttemptedOnlyMetricResults;
  import static org.apache.beam.runners.flink.metrics.FlinkMetricContainer.ACCUMULATOR_NAME;
  
  import java.util.Collections;
  import java.util.Map;
  import org.apache.beam.runners.core.metrics.MetricsContainerStepMap;
  import org.apache.beam.sdk.PipelineResult;
  import org.apache.beam.sdk.metrics.MetricResults;
  import org.joda.time.Duration;
  
  /**
   * Result of executing a {@link org.apache.beam.sdk.Pipeline} with Flink. This has methods to query
   * to job runtime and the final values of the accumulators.
   */
  @SuppressWarnings({
    "nullness" // TODO(https://github.com/apache/beam/issues/20497)
  })
  public class FlinkRunnerResult implements PipelineResult {
  
    private final Map<String, Object> accumulators;
  
    private final long runtime;
  
    FlinkRunnerResult(Map<String, Object> accumulators, long runtime) {
      this.accumulators =
          (accumulators == null || accumulators.isEmpty())
              ? Collections.emptyMap()
              : Collections.unmodifiableMap(accumulators);
      this.runtime = runtime;
    }
  
    @Override
    public State getState() {
      return State.DONE;
    }
  
    @Override
    public String toString() {
      return "FlinkRunnerResult{" + "accumulators=" + accumulators + ", runtime=" + runtime + '}';
    }
  
    @Override
    public State cancel() {
      // We can only be called here when we are done.
      return State.DONE;
    }
  
    @Override
    public State waitUntilFinish() {
      return State.DONE;
    }
  
    @Override
    public State waitUntilFinish(Duration duration) {
      return State.DONE;
    }
  
    @Override
    public MetricResults metrics() {
      return asAttemptedOnlyMetricResults(getMetricsContainerStepMap());
    }
  
    MetricsContainerStepMap getMetricsContainerStepMap() {
      return (MetricsContainerStepMap) accumulators.get(ACCUMULATOR_NAME);
    }
  }
  