hadoop TasksBlock 源码

haddop TasksBlock 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/TasksBlock.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.TASK_STATE;
import static org.apache.hadoop.mapreduce.v2.app.webapp.AMParams.TASK_TYPE;
import static org.apache.hadoop.yarn.util.StringHelper.join;
import static org.apache.hadoop.yarn.webapp.view.JQueryUI.C_PROGRESSBAR;
import static org.apache.hadoop.yarn.webapp.view.JQueryUI.C_PROGRESSBAR_VALUE;

import org.apache.commons.text.StringEscapeUtils;
import org.apache.hadoop.mapreduce.v2.api.records.TaskType;
import org.apache.hadoop.mapreduce.v2.app.job.Task;
import org.apache.hadoop.mapreduce.v2.app.webapp.dao.TaskInfo;
import org.apache.hadoop.mapreduce.v2.util.MRApps;
import org.apache.hadoop.util.StringUtils;
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.view.HtmlBlock;

import com.google.inject.Inject;

public class TasksBlock extends HtmlBlock {
  final App app;

  @Inject TasksBlock(App app) {
    this.app = app;
  }

  @Override protected void render(Block html) {
    if (app.getJob() == null) {
      html.
        h2($(TITLE));
      return;
    }
    TaskType type = null;
    String symbol = $(TASK_TYPE);
    if (!symbol.isEmpty()) {
      type = MRApps.taskType(symbol);
    }
    TBODY<TABLE<Hamlet>> tbody = html.
      table("#tasks").
        thead().
          tr().
            th("Task").
            th("Progress").
            th("Status").
            th("State").
            th("Start Time").
            th("Finish Time").
            th("Elapsed Time").__().__().
        tbody();
    StringBuilder tasksTableData = new StringBuilder("[\n");

    for (Task task : app.getJob().getTasks().values()) {
      if (type != null && task.getType() != type) {
        continue;
      }
      String taskStateStr = $(TASK_STATE);
      if (taskStateStr == null || taskStateStr.trim().equals("")) {
        taskStateStr = "ALL";
      }

      if (!taskStateStr.equalsIgnoreCase("ALL"))
      {
        try {
          // get stateUI enum
          MRApps.TaskStateUI stateUI = MRApps.taskState(taskStateStr);
          if (!stateUI.correspondsTo(task.getState()))
          {
            continue;
          }
        } catch (IllegalArgumentException e) {
          continue; // not supported state, ignore
        }
      }

      TaskInfo info = new TaskInfo(task);
      String tid = info.getId();
      String pct = StringUtils.format("%.2f", info.getProgress());
      tasksTableData.append("[\"<a href='").append(url("task", tid))
      .append("'>").append(tid).append("</a>\",\"")
      //Progress bar
      .append("<br title='").append(pct)
      .append("'> <div class='").append(C_PROGRESSBAR).append("' title='")
      .append(join(pct, '%')).append("'> ").append("<div class='")
      .append(C_PROGRESSBAR_VALUE).append("' style='")
      .append(join("width:", pct, '%')).append("'> </div> </div>\",\"")
      .append(StringEscapeUtils.escapeEcmaScript(
              StringEscapeUtils.escapeHtml4(info.getStatus()))).append("\",\"")

      .append(info.getState()).append("\",\"")
      .append(info.getStartTime()).append("\",\"")
      .append(info.getFinishTime()).append("\",\"")
      .append(info.getElapsedTime()).append("\"],\n");
    }
    //Remove the last comma and close off the array of arrays
    if(tasksTableData.charAt(tasksTableData.length() - 2) == ',') {
      tasksTableData.delete(tasksTableData.length()-2, tasksTableData.length()-1);
    }
    tasksTableData.append("]");
    html.script().$type("text/javascript").
        __("var tasksTableData=" + tasksTableData).__();

    tbody.__().__();
  }
}

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 ConfBlock 源码

hadoop CountersBlock 源码

hadoop CountersPage 源码