content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.job.plan;
  
  import alluxio.job.JobConfig;
  import alluxio.job.util.SerializableVoid;
  import alluxio.wire.WorkerInfo;
  
  import java.io.Serializable;
  import java.util.Map;
  
  /**
   * An abstract job definition where the run task method does not return a value.
   *
   * @param <T> the job configuration type
   * @param <P> the argument type
   */
  public abstract class AbstractVoidPlanDefinition<T extends JobConfig, P extends Serializable>
      implements PlanDefinition<T, P, SerializableVoid> {
  
    @Override
    public String join(T config, Map<WorkerInfo, SerializableVoid> taskResults) throws Exception {
      return "";
    }
  }
  