hadoop JobQueueClient 源码

haddop JobQueueClient 代码

文件路径：/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/JobQueueClient.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.hadoop.mapred;

import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.Writer;
import java.util.List;
import java.util.ArrayList;
import java.util.Arrays;

import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.mapreduce.JobStatus;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;

import org.apache.hadoop.thirdparty.com.google.common.base.Charsets;

/**
 * <code>JobQueueClient</code> is interface provided to the user in order to get
 * JobQueue related information from the {@link JobTracker}
 * 
 * It provides the facility to list the JobQueues present and ability to view
 * the list of jobs within a specific JobQueue
 * 
 **/

class JobQueueClient extends Configured implements Tool {

  JobClient jc;

  public JobQueueClient() {
  }

  public JobQueueClient(JobConf conf) throws IOException {
    setConf(conf);
  }

  private void init(JobConf conf) throws IOException {
    setConf(conf);
    jc = new JobClient(conf);
  }

  @Override
  public int run(String[] argv) throws Exception {
    int exitcode = -1;

    if (argv.length < 1) {
      displayUsage("");
      return exitcode;
    }
    String cmd = argv[0];
    boolean displayQueueList = false;
    boolean displayQueueInfoWithJobs = false;
    boolean displayQueueInfoWithoutJobs = false;
    boolean displayQueueAclsInfoForCurrentUser = false;

    if ("-list".equals(cmd)) {
      displayQueueList = true;
    } else if ("-showacls".equals(cmd)) {
      displayQueueAclsInfoForCurrentUser = true;
    } else if ("-info".equals(cmd)) {
      if (argv.length == 2 && !(argv[1].equals("-showJobs"))) {
        displayQueueInfoWithoutJobs = true;
      } else if (argv.length == 3) {
        if (argv[2].equals("-showJobs")) {
          displayQueueInfoWithJobs = true;
        } else {
          displayUsage(cmd);
          return exitcode;
        }
      } else {
        displayUsage(cmd);
        return exitcode;
      }
    } else {
      displayUsage(cmd);
      return exitcode;
    }
    
    JobConf conf = new JobConf(getConf());
    init(conf);
    if (displayQueueList) {
      displayQueueList();
      exitcode = 0;
    } else if (displayQueueInfoWithoutJobs) {
      displayQueueInfo(argv[1], false);
      exitcode = 0;
    } else if (displayQueueInfoWithJobs) {
      displayQueueInfo(argv[1], true);
      exitcode = 0;
    } else if (displayQueueAclsInfoForCurrentUser) {
      this.displayQueueAclsInfoForCurrentUser();
      exitcode = 0;
    }
    return exitcode;
  }

// format and print information about the passed in job queue.
  void printJobQueueInfo(JobQueueInfo jobQueueInfo, Writer writer)
    throws IOException {
    printJobQueueInfo(jobQueueInfo, writer, "");
  }

  // format and print information about the passed in job queue.
  @SuppressWarnings("deprecation")
  void printJobQueueInfo(JobQueueInfo jobQueueInfo, Writer writer,
    String prefix) throws IOException {
    if (jobQueueInfo == null) {
      writer.write("No queue found.\n");
      writer.flush();
      return;
    }
    writer.write(String.format(prefix + "======================\n"));
    writer.write(String.format(prefix + "Queue Name : %s \n",
        jobQueueInfo.getQueueName()));
    writer.write(String.format(prefix + "Queue State : %s \n",
        jobQueueInfo.getQueueState()));
    writer.write(String.format(prefix + "Scheduling Info : %s \n",
        jobQueueInfo.getSchedulingInfo()));
    List<JobQueueInfo> childQueues = jobQueueInfo.getChildren();
    if (childQueues != null && childQueues.size() > 0) {
      for (int i = 0; i < childQueues.size(); i++) {
	  printJobQueueInfo(childQueues.get(i), writer, "    " + prefix);
      }
    }
    writer.flush();
  }
  
  private void displayQueueList() throws IOException {
    JobQueueInfo[] rootQueues = jc.getRootQueues();
    for (JobQueueInfo queue : rootQueues) {
      printJobQueueInfo(queue, new PrintWriter(new OutputStreamWriter(
          System.out, Charsets.UTF_8)));
    }
  }
  
  /**
   * Expands the hierarchy of queues and gives the list of all queues in 
   * depth-first order
   * @param rootQueues the top-level queues
   * @return the list of all the queues in depth-first order.
   */
  List<JobQueueInfo> expandQueueList(JobQueueInfo[] rootQueues) {
    List<JobQueueInfo> allQueues = new ArrayList<JobQueueInfo>();
    for (JobQueueInfo queue : rootQueues) {
      allQueues.add(queue);
      if (queue.getChildren() != null) {
        JobQueueInfo[] childQueues 
          = queue.getChildren().toArray(new JobQueueInfo[0]);
        allQueues.addAll(expandQueueList(childQueues));
      }
    }
    return allQueues;
  }
 
  /**
   * Method used to display information pertaining to a Single JobQueue
   * registered with the {@link QueueManager}. Display of the Jobs is determine
   * by the boolean
   * 
   * @throws IOException, InterruptedException
   */
  private void displayQueueInfo(String queue, boolean showJobs)
      throws IOException, InterruptedException {
    JobQueueInfo jobQueueInfo = jc.getQueueInfo(queue);
    
    if (jobQueueInfo == null) {
      System.out.println("Queue \"" + queue + "\" does not exist.");
      return;
    }
    printJobQueueInfo(jobQueueInfo, new PrintWriter(new OutputStreamWriter(
        System.out, Charsets.UTF_8)));
    if (showJobs && (jobQueueInfo.getChildren() == null ||
        jobQueueInfo.getChildren().size() == 0)) {
      JobStatus[] jobs = jobQueueInfo.getJobStatuses();
      if (jobs == null)
        jobs = new JobStatus[0];
      jc.displayJobList(jobs);
    }
  }
   
  private void displayQueueAclsInfoForCurrentUser() throws IOException {
    QueueAclsInfo[] queueAclsInfoList = jc.getQueueAclsForCurrentUser();
    UserGroupInformation ugi = UserGroupInformation.getCurrentUser();
    if (queueAclsInfoList.length > 0) {
      System.out.println("Queue acls for user :  " + ugi.getShortUserName());
      System.out.println("\nQueue  Operations");
      System.out.println("=====================");
      for (QueueAclsInfo queueInfo : queueAclsInfoList) {
        System.out.print(queueInfo.getQueueName() + "  ");
        String[] ops = queueInfo.getOperations();
        Arrays.sort(ops);
        int max = ops.length - 1;
        for (int j = 0; j < ops.length; j++) {
          System.out.print(ops[j].replaceFirst("acl-", ""));
          if (j < max) {
            System.out.print(",");
          }
        }
        System.out.println();
      }
    } else {
      System.out.println("User " + ugi.getShortUserName()
          + " does not have access to any queue. \n");
    }
  }

  private void displayUsage(String cmd) {
    String prefix = "Usage: queue ";
    if ("-queueinfo".equals(cmd)) {
      System.err.println(prefix + "[" + cmd + "<job-queue-name> [-showJobs]]");
    } else {
      System.err.printf(prefix + "<command> <args>%n");
      System.err.printf("\t[-list]%n");
      System.err.printf("\t[-info <job-queue-name> [-showJobs]]%n");
      System.err.printf("\t[-showacls] %n%n");
      ToolRunner.printGenericCommandUsage(System.out);
    }
  }

  public static void main(String[] argv) throws Exception {
    int res = ToolRunner.run(new JobQueueClient(), argv);
    System.exit(res);
  }

}

相关信息

hadoop 源码目录

相关文章

hadoop AMFeedback 源码

hadoop BackupStore 源码

hadoop BasicTypeSorterBase 源码

hadoop BufferSorter 源码

hadoop CleanupQueue 源码

hadoop Clock 源码

hadoop ClusterStatus 源码

hadoop Counters 源码

hadoop CumulativePeriodicStats 源码

hadoop DeprecatedQueueConfigurationParser 源码