hadoop-mapreduce/hadoop-mr-client/hadoop-mapreduce-client-common/src/main/java/org/apache/hadoop/mapreduce/v2/api/records/impl/pb/TaskAttemptIdPBImpl.java

package org.apache.hadoop.mapreduce.v2.api.records.impl.pb;


import java.text.NumberFormat;

import org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId;
import org.apache.hadoop.mapreduce.v2.api.records.TaskId;
import org.apache.hadoop.mapreduce.v2.api.records.TaskType;
import org.apache.hadoop.mapreduce.v2.proto.MRProtos.TaskAttemptIdProto;
import org.apache.hadoop.mapreduce.v2.proto.MRProtos.TaskAttemptIdProtoOrBuilder;
import org.apache.hadoop.mapreduce.v2.proto.MRProtos.TaskIdProto;
import org.apache.hadoop.yarn.api.records.ProtoBase;


    
public class TaskAttemptIdPBImpl extends ProtoBase<TaskAttemptIdProto> implements TaskAttemptId {
  TaskAttemptIdProto proto = TaskAttemptIdProto.getDefaultInstance();
  TaskAttemptIdProto.Builder builder = null;
  boolean viaProto = false;
  
  private TaskId taskId = null;
  protected static final NumberFormat idFormat = NumberFormat.getInstance();
  static {
    idFormat.setGroupingUsed(false);
    idFormat.setMinimumIntegerDigits(6);
  }
  
  protected static final NumberFormat jobidFormat = NumberFormat.getInstance();
  static {
    jobidFormat.setGroupingUsed(false);
    jobidFormat.setMinimumIntegerDigits(4);
  }
  
  
  public TaskAttemptIdPBImpl() {
    builder = TaskAttemptIdProto.newBuilder();
  }

  public TaskAttemptIdPBImpl(TaskAttemptIdProto proto) {
    this.proto = proto;
    viaProto = true;
  }
  
  public TaskAttemptIdProto getProto() {
      mergeLocalToProto();
    proto = viaProto ? proto : builder.build();
    viaProto = true;
    return proto;
  }

  private void mergeLocalToBuilder() {
    if (this.taskId != null && !((TaskIdPBImpl)this.taskId).getProto().equals(builder.getTaskId())) {
      builder.setTaskId(convertToProtoFormat(this.taskId));
    }
  }

  private void mergeLocalToProto() {
    if (viaProto) 
      maybeInitBuilder();
    mergeLocalToBuilder();
    proto = builder.build();
    viaProto = true;
  }

  private void maybeInitBuilder() {
    if (viaProto || builder == null) {
      builder = TaskAttemptIdProto.newBuilder(proto);
    }
    viaProto = false;
  }
    
  
  @Override
  public int getId() {
    TaskAttemptIdProtoOrBuilder p = viaProto ? proto : builder;
    return (p.getId());
  }

  @Override
  public void setId(int id) {
    maybeInitBuilder();
    builder.setId((id));
  }
  @Override
  public TaskId getTaskId() {
    TaskAttemptIdProtoOrBuilder p = viaProto ? proto : builder;
    if (this.taskId != null) {
      return this.taskId;
    }
    if (!p.hasTaskId()) {
      return null;
    }
    taskId = convertFromProtoFormat(p.getTaskId());
    return taskId;
  }

  @Override
  public void setTaskId(TaskId taskId) {
    maybeInitBuilder();
    if (taskId == null)
      builder.clearTaskId();
    this.taskId = taskId;
  }

  private TaskIdPBImpl convertFromProtoFormat(TaskIdProto p) {
    return new TaskIdPBImpl(p);
  }

  private TaskIdProto convertToProtoFormat(TaskId t) {
    return ((TaskIdPBImpl)t).getProto();
  }
  
  @Override
  public String toString() {
    String identifier = (getTaskId() == null) ? "none":
      getTaskId().getJobId().getAppId().getClusterTimestamp() + "_" +
      jobidFormat.format(getTaskId().getJobId().getAppId().getId()) + "_" +
      ((getTaskId().getTaskType() == TaskType.MAP) ? "m" : "r") + "_" +
      idFormat.format(getTaskId().getId()) + "_" +
       getId();
      
    return "attempt_" + identifier;
  }
}