Java tutorial
/** * 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 static org.apache.hadoop.yarn.util.StringHelper.join; import static org.apache.hadoop.yarn.webapp.YarnWebParams.APP_STATE; import static org.apache.hadoop.yarn.webapp.view.JQueryUI.C_PROGRESSBAR; import static org.apache.hadoop.yarn.webapp.view.JQueryUI.C_PROGRESSBAR_VALUE; import java.util.Collection; import java.util.HashSet; import java.util.Map; import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.ConcurrentMap; import org.apache.commons.lang.StringEscapeUtils; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.util.StringUtils; import org.apache.hadoop.yarn.api.records.ApplicationAttemptId; import org.apache.hadoop.yarn.api.records.ApplicationId; import org.apache.hadoop.yarn.api.records.YarnApplicationState; import org.apache.hadoop.yarn.server.resourcemanager.ResourceManager; import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMApp; import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppState; import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler; import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.AppInfo; import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.FairSchedulerInfo; import org.apache.hadoop.yarn.webapp.hamlet.Hamlet; import org.apache.hadoop.yarn.webapp.hamlet.Hamlet.TABLE; import org.apache.hadoop.yarn.webapp.hamlet.Hamlet.TBODY; import org.apache.hadoop.yarn.webapp.util.WebAppUtils; import org.apache.hadoop.yarn.webapp.view.HtmlBlock; import com.google.inject.Inject; /** * Shows application information specific to the fair * scheduler as part of the fair scheduler page. */ public class FairSchedulerAppsBlock extends HtmlBlock { final ConcurrentMap<ApplicationId, RMApp> apps; final FairSchedulerInfo fsinfo; final Configuration conf; final ResourceManager rm; @Inject public FairSchedulerAppsBlock(ResourceManager rm, ViewContext ctx, Configuration conf) { super(ctx); FairScheduler scheduler = (FairScheduler) rm.getResourceScheduler(); fsinfo = new FairSchedulerInfo(scheduler); apps = new ConcurrentHashMap<ApplicationId, RMApp>(); for (Map.Entry<ApplicationId, RMApp> entry : rm.getRMContext().getRMApps().entrySet()) { if (!(RMAppState.NEW.equals(entry.getValue().getState()) || RMAppState.NEW_SAVING.equals(entry.getValue().getState()) || RMAppState.SUBMITTED.equals(entry.getValue().getState()))) { apps.put(entry.getKey(), entry.getValue()); } } this.conf = conf; this.rm = rm; } @Override public void render(Block html) { TBODY<TABLE<Hamlet>> tbody = html.table("#apps").thead().tr().th(".id", "ID").th(".user", "User") .th(".name", "Name").th(".type", "Application Type").th(".queue", "Queue") .th(".fairshare", "Fair Share").th(".starttime", "StartTime").th(".finishtime", "FinishTime") .th(".state", "State").th(".finalstatus", "FinalStatus") .th(".runningcontainer", "Running Containers").th(".allocatedCpu", "Allocated CPU VCores") .th(".allocatedMemory", "Allocated Memory MB").th(".progress", "Progress").th(".ui", "Tracking UI") ._()._().tbody(); Collection<YarnApplicationState> reqAppStates = null; String reqStateString = $(APP_STATE); if (reqStateString != null && !reqStateString.isEmpty()) { String[] appStateStrings = reqStateString.split(","); reqAppStates = new HashSet<YarnApplicationState>(appStateStrings.length); for (String stateString : appStateStrings) { reqAppStates.add(YarnApplicationState.valueOf(stateString)); } } StringBuilder appsTableData = new StringBuilder("[\n"); for (RMApp app : apps.values()) { if (reqAppStates != null && !reqAppStates.contains(app.createApplicationState())) { continue; } AppInfo appInfo = new AppInfo(rm, app, true, WebAppUtils.getHttpSchemePrefix(conf)); String percent = StringUtils.format("%.1f", appInfo.getProgress()); ApplicationAttemptId attemptId = app.getCurrentAppAttempt().getAppAttemptId(); long fairShare = fsinfo.getAppFairShare(attemptId); if (fairShare == FairSchedulerInfo.INVALID_FAIR_SHARE) { // FairScheduler#applications don't have the entry. Skip it. continue; } appsTableData.append("[\"<a href='").append(url("app", appInfo.getAppId())).append("'>") .append(appInfo.getAppId()).append("</a>\",\"") .append(StringEscapeUtils.escapeJavaScript(StringEscapeUtils.escapeHtml(appInfo.getUser()))) .append("\",\"") .append(StringEscapeUtils.escapeJavaScript(StringEscapeUtils.escapeHtml(appInfo.getName()))) .append("\",\"") .append(StringEscapeUtils .escapeJavaScript(StringEscapeUtils.escapeHtml(appInfo.getApplicationType()))) .append("\",\"") .append(StringEscapeUtils.escapeJavaScript(StringEscapeUtils.escapeHtml(appInfo.getQueue()))) .append("\",\"").append(fairShare).append("\",\"").append(appInfo.getStartTime()) .append("\",\"").append(appInfo.getFinishTime()).append("\",\"").append(appInfo.getState()) .append("\",\"").append(appInfo.getFinalStatus()).append("\",\"") .append(appInfo.getRunningContainers() == -1 ? "N/A" : String.valueOf(appInfo.getRunningContainers())) .append("\",\"") .append(appInfo.getAllocatedVCores() == -1 ? "N/A" : String.valueOf(appInfo.getAllocatedVCores())) .append("\",\"") .append(appInfo.getAllocatedMB() == -1 ? "N/A" : String.valueOf(appInfo.getAllocatedMB())) .append("\",\"") // Progress bar .append("<br title='").append(percent).append("'> <div class='").append(C_PROGRESSBAR) .append("' title='").append(join(percent, '%')).append("'> ").append("<div class='") .append(C_PROGRESSBAR_VALUE).append("' style='").append(join("width:", percent, '%')) .append("'> </div> </div>").append("\",\"<a href='"); String trackingURL = !appInfo.isTrackingUrlReady() ? "#" : appInfo.getTrackingUrlPretty(); appsTableData.append(trackingURL).append("'>").append(appInfo.getTrackingUI()).append("</a>\"],\n"); } if (appsTableData.charAt(appsTableData.length() - 2) == ',') { appsTableData.delete(appsTableData.length() - 2, appsTableData.length() - 1); } appsTableData.append("]"); html.script().$type("text/javascript")._("var appsTableData=" + appsTableData)._(); tbody._()._(); } }