tez-dag/src/main/java/org/apache/tez/dag/app/dag/impl/ImmediateStartVertexScheduler.java

/**
* 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.tez.dag.app.dag.impl;

import org.apache.hadoop.conf.Configuration;
import org.apache.tez.dag.app.dag.Vertex;
import org.apache.tez.dag.app.dag.VertexScheduler;
import org.apache.tez.dag.records.TezTaskAttemptID;

/**
 * Starts all tasks immediately on vertex start
 */
public class ImmediateStartVertexScheduler implements VertexScheduler {
  final Vertex managedVertex;
  
  ImmediateStartVertexScheduler(Vertex vertex) {
    managedVertex = vertex;
  }
  
  @Override
  public void onVertexStarted() {
    managedVertex.scheduleTasks(managedVertex.getTasks().keySet());
  }

  @Override
  public void onSourceTaskCompleted(TezTaskAttemptID attemptId) {
  }

  @Override
  public void initialize(Configuration conf) {    
  }

}