branch-0.23.1/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/webapp/SingleCounterPage.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_ID;
import static org.apache.hadoop.yarn.webapp.view.JQueryUI.*;

import org.apache.hadoop.mapreduce.v2.app.webapp.SingleCounterBlock;
import org.apache.hadoop.yarn.webapp.SubView;

/**
 * Render the counters page
 */
public class SingleCounterPage extends AppView {

  /*
   * (non-Javadoc)
   * @see org.apache.hadoop.mapreduce.v2.hs.webapp.HsView#preHead(org.apache.hadoop.yarn.webapp.hamlet.Hamlet.HTML)
   */
  @Override protected void preHead(Page.HTML<_> html) {
    commonPreHead(html);
    String tid = $(TASK_ID);
    String activeNav = "3";
    if(tid == null || tid.isEmpty()) {
      activeNav = "2";
    }
    set(initID(ACCORDION, "nav"), "{autoHeight:false, active:"+activeNav+"}");
    set(DATATABLES_ID, "singleCounter");
    set(initID(DATATABLES, "singleCounter"), counterTableInit());
    setTableStyles(html, "singleCounter");
  }

  /**
   * @return The end of a javascript map that is the jquery datatable 
   * configuration for the jobs table.  the Jobs table is assumed to be
   * rendered by the class returned from {@link #content()} 
   */
  private String counterTableInit() {
    return tableInit().
        append(",aoColumnDefs:[").
        append("{'sType':'title-numeric', 'aTargets': [ 1 ] }").
        append("]}").
        toString();
  }
  
  /**
   * The content of this page is the CountersBlock now.
   * @return CountersBlock.class
   */
  @Override protected Class<? extends SubView> content() {
    return SingleCounterBlock.class;
  }
}