hadoop ConfBlock 源码

haddop ConfBlock 代码

文件路径：/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/webapp/ConfBlock.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.mapreduce.v2.app.webapp;

import static org.apache.hadoop.mapreduce.v2.app.webapp.AMParams.JOB_ID;
import static org.apache.hadoop.yarn.webapp.view.JQueryUI._TH;

import java.io.IOException;

import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapreduce.v2.api.records.JobId;
import org.apache.hadoop.mapreduce.v2.app.AppContext;
import org.apache.hadoop.mapreduce.v2.app.job.Job;
import org.apache.hadoop.mapreduce.v2.app.webapp.dao.ConfEntryInfo;
import org.apache.hadoop.mapreduce.v2.app.webapp.dao.ConfInfo;
import org.apache.hadoop.mapreduce.v2.util.MRApps;
import org.apache.hadoop.yarn.webapp.hamlet2.Hamlet;
import org.apache.hadoop.yarn.webapp.hamlet2.Hamlet.TABLE;
import org.apache.hadoop.yarn.webapp.hamlet2.Hamlet.TBODY;
import org.apache.hadoop.yarn.webapp.hamlet2.HamletSpec.InputType;
import org.apache.hadoop.yarn.webapp.view.HtmlBlock;

import com.google.inject.Inject;

/**
 * Render the configuration for this job.
 */
public class ConfBlock extends HtmlBlock {
  final AppContext appContext;

  @Inject ConfBlock(AppContext appctx) {
    appContext = appctx;
  }

  /*
   * (non-Javadoc)
   * @see org.apache.hadoop.yarn.webapp.view.HtmlBlock#render(org.apache.hadoop.yarn.webapp.view.HtmlBlock.Block)
   */
  @Override protected void render(Block html) {
    String jid = $(JOB_ID);
    if (jid.isEmpty()) {
      html.
        p().__("Sorry, can't do anything without a JobID.").__();
      return;
    }
    JobId jobID = MRApps.toJobID(jid);
    Job job = appContext.getJob(jobID);
    if (job == null) {
      html.
        p().__("Sorry, ", jid, " not found.").__();
      return;
    }
    Path confPath = job.getConfFile();
    try {
      ConfInfo info = new ConfInfo(job);

      html.div().a("/jobhistory/downloadconf/" + jid, confPath.toString()).__();
      TBODY<TABLE<Hamlet>> tbody = html.
        // Tasks table
      table("#conf").
        thead().
          tr().
            th(_TH, "key").
            th(_TH, "value").
            th(_TH, "source chain").
              __().
              __().
      tbody();
      for (ConfEntryInfo entry : info.getProperties()) {
        StringBuffer buffer = new StringBuffer();
        String[] sources = entry.getSource();
        //Skip the last entry, because it is always the same HDFS file, and
        // output them in reverse order so most recent is output first
        boolean first = true;
        for(int i = (sources.length  - 2); i >= 0; i--) {
          if(!first) {
            buffer.append(" <- ");
          }
          first = false;
          buffer.append(sources[i]);
        }
        tbody.
          tr().
            td(entry.getName()).
            td(entry.getValue()).
            td(buffer.toString()).
            __();
      }
      tbody.__().
      tfoot().
        tr().
          th().input("search_init").$type(InputType.text).$name("key").$value("key").__().__().
          th().input("search_init").$type(InputType.text).$name("value").$value("value").__().__().
          th().input("search_init").$type(InputType.text).$name("source chain").$value("source chain").__().__().
          __().
          __().
          __();
    } catch(IOException e) {
      LOG.error("Error while reading "+confPath, e);
      html.p().__("Sorry got an error while reading conf file. ", confPath);
    }
  }
}

相关信息

hadoop 源码目录

相关文章

hadoop AMParams 源码

hadoop AMWebApp 源码

hadoop AMWebServices 源码

hadoop App 源码

hadoop AppController 源码

hadoop AppView 源码

hadoop AttemptsPage 源码

hadoop CountersBlock 源码

hadoop CountersPage 源码

hadoop InfoPage 源码