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.mapreduce.v2.hs.webapp; import java.text.SimpleDateFormat; import java.util.Date; import org.apache.commons.lang.StringEscapeUtils; import org.apache.hadoop.mapreduce.v2.app.AppContext; import org.apache.hadoop.mapreduce.v2.app.job.Job; import org.apache.hadoop.mapreduce.v2.hs.webapp.dao.JobInfo; import org.apache.hadoop.util.StringUtils; import org.apache.hadoop.yarn.util.Times; 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.hamlet.HamletSpec.InputType; import org.apache.hadoop.yarn.webapp.view.HtmlBlock; import com.google.inject.Inject; /** * Render all of the jobs that the history server is aware of. */ public class HsJobsBlock extends HtmlBlock { final AppContext appContext; final SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy.MM.dd HH:mm:ss z"); @Inject HsJobsBlock(AppContext appCtx) { appContext = appCtx; } /* * (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) { TBODY<TABLE<Hamlet>> tbody = html.h2("Retired Jobs").table("#jobs").thead().tr().th("Submit Time") .th("Start Time").th("Finish Time").th(".id", "Job ID").th(".name", "Name").th("User").th("Queue") .th(".state", "State").th("Maps Total").th("Maps Completed").th("Reduces Total") .th("Reduces Completed").th("Elapsed Time")._()._().tbody(); LOG.info("Getting list of all Jobs."); // Write all the data into a JavaScript array of arrays for JQuery // DataTables to display StringBuilder jobsTableData = new StringBuilder("[\n"); for (Job j : appContext.getAllJobs().values()) { JobInfo job = new JobInfo(j); jobsTableData.append("[\"").append(dateFormat.format(new Date(job.getSubmitTime()))).append("\",\"") .append(dateFormat.format(new Date(job.getStartTime()))).append("\",\"") .append(dateFormat.format(new Date(job.getFinishTime()))).append("\",\"").append("<a href='") .append(url("job", job.getId())).append("'>").append(job.getId()).append("</a>\",\"") .append(StringEscapeUtils.escapeJavaScript(StringEscapeUtils.escapeHtml(job.getName()))) .append("\",\"") .append(StringEscapeUtils.escapeJavaScript(StringEscapeUtils.escapeHtml(job.getUserName()))) .append("\",\"") .append(StringEscapeUtils.escapeJavaScript(StringEscapeUtils.escapeHtml(job.getQueueName()))) .append("\",\"").append(job.getState()).append("\",\"") .append(String.valueOf(job.getMapsTotal())).append("\",\"") .append(String.valueOf(job.getMapsCompleted())).append("\",\"") .append(String.valueOf(job.getReducesTotal())).append("\",\"") .append(String.valueOf(job.getReducesCompleted())).append("\",\"") .append(StringUtils .formatTimeSortable(Times.elapsed(job.getStartTime(), job.getFinishTime(), false))) .append("\"],\n"); } //Remove the last comma and close off the array of arrays if (jobsTableData.charAt(jobsTableData.length() - 2) == ',') { jobsTableData.delete(jobsTableData.length() - 2, jobsTableData.length() - 1); } jobsTableData.append("]"); html.script().$type("text/javascript")._("var jobsTableData=" + jobsTableData)._(); tbody._().tfoot().tr().th().input("search_init").$type(InputType.text).$name("submit_time") .$value("Submit Time")._()._().th().input("search_init").$type(InputType.text).$name("start_time") .$value("Start Time")._()._().th().input("search_init").$type(InputType.text).$name("finish_time") .$value("Finish Time")._()._().th().input("search_init").$type(InputType.text).$name("job_id") .$value("Job ID")._()._().th().input("search_init").$type(InputType.text).$name("name") .$value("Name")._()._().th().input("search_init").$type(InputType.text).$name("user").$value("User") ._()._().th().input("search_init").$type(InputType.text).$name("queue").$value("Queue")._()._().th() .input("search_init").$type(InputType.text).$name("state").$value("State")._()._().th() .input("search_init").$type(InputType.text).$name("maps_total").$value("Maps Total")._()._().th() .input("search_init").$type(InputType.text).$name("maps_completed").$value("Maps Completed")._()._() .th().input("search_init").$type(InputType.text).$name("reduces_total").$value("Reduces Total")._() ._().th().input("search_init").$type(InputType.text).$name("reduces_completed") .$value("Reduces Completed")._()._().th().input("search_init").$type(InputType.text) .$name("elapsed_time").$value("Elapsed Time")._()._()._()._()._(); } }