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.apex.examples.transform;
  
  import java.util.Arrays;
  
  import org.apache.apex.malhar.lib.partitioner.StatelessThroughputBasedPartitioner;
  import org.apache.apex.malhar.lib.transform.TransformOperator;
  import org.apache.hadoop.conf.Configuration;
  
  import com.datatorrent.api.Context;
  import com.datatorrent.api.DAG;
  import com.datatorrent.api.StatsListener;
  import com.datatorrent.api.annotation.ApplicationAnnotation;
  
  @ApplicationAnnotation(name = "DynamicTransformApp")
  /**
   * @since 3.7.0
   */
  public class DynamicTransformApplication extends SimpleTransformApplication
  {
    private static String COOL_DOWN_MILLIS = "dt.cooldown";
    private static String MAX_THROUGHPUT = "dt.maxThroughput";
    private static String MIN_THROUGHPUT = "dt.minThroughput";
  
    @Override
    void setPartitioner(DAG dag,Configuration conf,TransformOperator transform)
    {
      StatelessThroughputBasedPartitioner<TransformOperator> partitioner = new StatelessThroughputBasedPartitioner<>();
      partitioner.setCooldownMillis(conf.getLong(COOL_DOWN_MILLIS, 10000));
      partitioner.setMaximumEvents(conf.getLong(MAX_THROUGHPUT, 30000));
      partitioner.setMinimumEvents(conf.getLong(MIN_THROUGHPUT, 10000));
      dag.setAttribute(transform, Context.OperatorContext.STATS_LISTENERS, Arrays.asList(new StatsListener[]{partitioner}));
      dag.setAttribute(transform, Context.OperatorContext.PARTITIONER, partitioner);
    }
  }
  