taskreport.java

hadoop:Nutch集群平台

/**
 * Copyright 2005 The Apache Software Foundation
 *
 * Licensed 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.hadoop.mapred;

import org.apache.hadoop.io.*;

import java.io.*;

/** A report on the state of a task. */
public class TaskReport implements Writable {
  private String taskid;
  private float progress;
  private String state;
  private String[] diagnostics;
  private long startTime ; 
  private long finishTime; 

  public TaskReport() {}

  TaskReport(String taskid, float progress, String state,
             String[] diagnostics, long startTime, long finishTime) {
    this.taskid = taskid;
    this.progress = progress;
    this.state = state;
    this.diagnostics = diagnostics;
    this.startTime = startTime ; 
    this.finishTime = finishTime ;
  }
    
  /** The id of the task. */
  public String getTaskId() { return taskid; }
  /** The amount completed, between zero and one. */
  public float getProgress() { return progress; }
  /** The most recent state, reported by a {@link Reporter}. */
  public String getState() { return state; }
  /** A list of error messages. */
  public String[] getDiagnostics() { return diagnostics; }
  /**
   * Get finish time of task. 
   * @return 0, if finish time was not set else returns finish time.
   */
  public long getFinishTime() {
    return finishTime;
  }

  /** 
   * set finish time of task. 
   * @param finishTime finish time of task. 
   */
  void setFinishTime(long finishTime) {
    this.finishTime = finishTime;
  }

  /**
   * Get start time of task. 
   * @return 0 if start time was not set, else start time. 
   */
  public long getStartTime() {
    return startTime;
  }

  /** 
   * set start time of the task. 
   */ 
  void setStartTime(long startTime) {
    this.startTime = startTime;
  }
  //////////////////////////////////////////////
  // Writable
  //////////////////////////////////////////////
  public void write(DataOutput out) throws IOException {
    UTF8.writeString(out, taskid);
    out.writeFloat(progress);
    UTF8.writeString(out, state);
    out.writeLong(startTime);
    out.writeLong(finishTime);
    new ObjectWritable(diagnostics).write(out);
  }

  public void readFields(DataInput in) throws IOException {
    this.taskid = UTF8.readString(in);
    this.progress = in.readFloat();
    this.state = UTF8.readString(in);
    this.startTime = in.readLong(); 
    this.finishTime = in.readLong() ;
    
    ObjectWritable wrapper = new ObjectWritable();
    wrapper.readFields(in);
    diagnostics = (String[])wrapper.get();
  }
}