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 org.apache.beam.sdk.Pipeline;
  import org.apache.beam.sdk.Pipeline.PipelineExecutionException;
  import org.apache.beam.sdk.PipelineResult;
  import org.apache.beam.sdk.PipelineRunner;
  import org.apache.beam.sdk.options.PipelineOptions;
  import org.apache.beam.sdk.util.UserCodeException;
  
  /** Test Flink runner. */
  @SuppressWarnings({
    "nullness" // TODO(https://github.com/apache/beam/issues/20497)
  })
  public class TestFlinkRunner extends PipelineRunner<PipelineResult> {
  
    private FlinkRunner delegate;
  
    private TestFlinkRunner(FlinkPipelineOptions options) {
      options.setRunner(TestFlinkRunner.class);
      if (options.getParallelism() == -1) {
        // Limit parallelism to avoid too much memory consumption during local execution
        options.setParallelism(1);
      }
      this.delegate = FlinkRunner.fromOptions(options);
    }
  
    public static TestFlinkRunner fromOptions(PipelineOptions options) {
      FlinkPipelineOptions flinkOptions = options.as(FlinkPipelineOptions.class);
      return new TestFlinkRunner(flinkOptions);
    }
  
    public static TestFlinkRunner create(boolean streaming) {
      FlinkPipelineOptions flinkOptions = FlinkPipelineOptions.defaults();
      flinkOptions.setStreaming(streaming);
      return TestFlinkRunner.fromOptions(flinkOptions);
    }
  
    @Override
    public PipelineResult run(Pipeline pipeline) {
      try {
        return delegate.run(pipeline);
      } catch (Throwable t) {
        // Special case hack to pull out assertion errors from PAssert; instead there should
        // probably be a better story along the lines of UserCodeException.
        UserCodeException innermostUserCodeException = null;
        Throwable current = t;
        for (; current.getCause() != null; current = current.getCause()) {
          if (current instanceof UserCodeException) {
            innermostUserCodeException = (UserCodeException) current;
          }
        }
        if (innermostUserCodeException != null) {
          current = innermostUserCodeException.getCause();
        }
        if (current instanceof AssertionError) {
          throw (AssertionError) current;
        }
        throw new PipelineExecutionException(current);
      }
    }
  
    public PipelineOptions getPipelineOptions() {
      return delegate.getPipelineOptions();
    }
  }
  