/**
* 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;

import java.util.Collection;
import java.util.List;
import java.util.Map;

import org.apache.hadoop.yarn.api.records.Resource;
import org.apache.tez.common.counters.TezCounters;
import org.apache.tez.dag.api.ProcessorDescriptor;
import org.apache.tez.dag.api.records.DAGProtos.VertexPlan;
import org.apache.tez.dag.api.client.ProgressBuilder;
import org.apache.tez.dag.api.client.VertexStatusBuilder;
import org.apache.tez.dag.app.dag.impl.Edge;
import org.apache.tez.dag.records.TezTaskID;
import org.apache.tez.dag.records.TezVertexID;
import org.apache.tez.runtime.api.impl.InputSpec;
import org.apache.tez.runtime.api.impl.OutputSpec;


/**
 * Main interface to interact with the job. Provides only getters.
 */
public interface Vertex extends Comparable<Vertex> {

  TezVertexID getVertexId();
  public VertexPlan getVertexPlan();

  int getDistanceFromRoot();
  String getName();
  VertexState getState();

  /**
   * Get all the counters of this vertex.
   * @return aggregate task-counters
   */
  TezCounters getAllCounters();

  Map<TezTaskID, Task> getTasks();
  Task getTask(TezTaskID taskID);
  Task getTask(int taskIndex);
  List<String> getDiagnostics();
  int getTotalTasks();
  int getCompletedTasks();
  int getSucceededTasks();
  float getProgress();
  ProgressBuilder getVertexProgress();
  VertexStatusBuilder getVertexStatus();

  void setParallelism(int parallelism,Map<Vertex, EdgeManager> sourceEdgeManagers);

  // CHANGE THESE TO LISTS AND MAINTAIN ORDER?
  void setInputVertices(Map<Vertex, Edge> inVertices);
  void setOutputVertices(Map<Vertex, Edge> outVertices);

  Map<Vertex, Edge> getInputVertices();
  Map<Vertex, Edge> getOutputVertices();
  
  List<InputSpec> getInputSpecList(int taskIndex);
  List<OutputSpec> getOutputSpecList(int taskIndex);

  int getInputVerticesCount();
  int getOutputVerticesCount();
  void scheduleTasks(Collection<TezTaskID> taskIDs);
  Resource getTaskResource();

  ProcessorDescriptor getProcessorDescriptor();
  public DAG getDAG();
  VertexTerminationCause getTerminationCause();
}