| /** |
| * 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.yarn.server.resourcemanager.webapp; |
| |
| import com.google.inject.Inject; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.yarn.api.records.YarnApplicationState; |
| import org.apache.hadoop.yarn.server.webapp.WebPageUtils; |
| import org.apache.hadoop.yarn.util.Log4jWarningErrorMetricsAppender; |
| import org.apache.hadoop.yarn.webapp.hamlet2.Hamlet; |
| import org.apache.hadoop.yarn.webapp.hamlet2.Hamlet.DIV; |
| import org.apache.hadoop.yarn.webapp.hamlet2.Hamlet.LI; |
| import org.apache.hadoop.yarn.webapp.hamlet2.Hamlet.UL; |
| import org.apache.hadoop.yarn.webapp.view.HtmlBlock; |
| |
| import static org.apache.hadoop.util.GenericsUtil.isLog4jLogger; |
| |
| public class NavBlock extends HtmlBlock { |
| private Configuration conf; |
| |
| @Inject |
| public NavBlock(Configuration conf) { |
| this.conf = conf; |
| } |
| |
| @Override public void render(Block html) { |
| boolean addErrorsAndWarningsLink = false; |
| if (isLog4jLogger(NavBlock.class)) { |
| Log4jWarningErrorMetricsAppender appender = |
| Log4jWarningErrorMetricsAppender.findAppender(); |
| if (appender != null) { |
| addErrorsAndWarningsLink = true; |
| } |
| } |
| UL<DIV<Hamlet>> mainList = html. |
| div("#nav"). |
| h3("Cluster"). |
| ul(). |
| li().a(url("cluster"), "About").__(). |
| li().a(url("nodes"), "Nodes").__(). |
| li().a(url("nodelabels"), "Node Labels").__(); |
| UL<LI<UL<DIV<Hamlet>>>> subAppsList = mainList. |
| li().a(url("apps"), "Applications"). |
| ul(); |
| subAppsList.li().__(); |
| for (YarnApplicationState state : YarnApplicationState.values()) { |
| subAppsList. |
| li().a(url("apps", state.toString()), state.toString()).__(); |
| } |
| subAppsList.__().__(); |
| |
| DIV<Hamlet> sectionBefore = mainList. |
| li().a(url("scheduler"), "Scheduler").__().__(); |
| UL<DIV<Hamlet>> tools = WebPageUtils.appendToolSection(sectionBefore, conf); |
| |
| if (tools == null) { |
| return; |
| } |
| |
| if (addErrorsAndWarningsLink) { |
| tools.li().a(url("errors-and-warnings"), "Errors/Warnings").__(); |
| } |
| tools.__().__(); |
| } |
| } |