hadoop HsNavBlock 源码
haddop HsNavBlock 代码
文件路径：/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/webapp/HsNavBlock.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.hs.webapp;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.mapreduce.v2.app.webapp.App;
import org.apache.hadoop.mapreduce.v2.util.MRApps;
import org.apache.hadoop.yarn.server.webapp.WebPageUtils;
import org.apache.hadoop.yarn.webapp.hamlet2.Hamlet;
import org.apache.hadoop.yarn.webapp.hamlet2.Hamlet.DIV;
import org.apache.hadoop.yarn.webapp.view.HtmlBlock;
import com.google.inject.Inject;
/**
* The navigation block for the history server
*/
public class HsNavBlock extends HtmlBlock {
final App app;
private Configuration conf;
@Inject HsNavBlock(App app, Configuration conf) {
this.app = app;
this.conf = conf;
}
/*
* (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) {
DIV<Hamlet> nav = html.
div("#nav").
h3("Application").
ul().
li().a(url("about"), "About").__().
li().a(url("app"), "Jobs").__().__();
if (app.getJob() != null) {
String jobid = MRApps.toString(app.getJob().getID());
nav.
h3("Job").
ul().
li().a(url("job", jobid), "Overview").__().
li().a(url("jobcounters", jobid), "Counters").__().
li().a(url("conf", jobid), "Configuration").__().
li().a(url("tasks", jobid, "m"), "Map tasks").__().
li().a(url("tasks", jobid, "r"), "Reduce tasks").__().__();
if (app.getTask() != null) {
String taskid = MRApps.toString(app.getTask().getID());
nav.
h3("Task").
ul().
li().a(url("task", taskid), "Task Overview").__().
li().a(url("taskcounters", taskid), "Counters").__().__();
}
}
Hamlet.UL<DIV<Hamlet>> tools = WebPageUtils.appendToolSection(nav, conf);
if (tools != null) {
tools.__().__();
}
}
}
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