/**
* 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.server.jobtracker;
import java.io.IOException;
import java.util.List;
import java.text.DecimalFormat;
import javax.servlet.jsp.JspWriter;
import javax.servlet.http.*;
import org.apache.hadoop.mapred.ClusterStatus;
import org.apache.hadoop.mapred.JobInProgress;
import org.apache.hadoop.mapred.JobProfile;
import org.apache.hadoop.mapred.JobStatus;
import org.apache.hadoop.mapred.JobTracker;
import org.apache.hadoop.mapred.TaskTrackerStatus;
import org.apache.hadoop.mapreduce.JobID;
import org.apache.hadoop.util.StringUtils;
/**
* Methods to help format output for JobTracker XML JSPX
*/
public class JobTrackerJspHelper {
public JobTrackerJspHelper() {
percentFormat = new DecimalFormat("##0.00");
}
private DecimalFormat percentFormat;
/**
* Returns an XML-formatted table of the jobs in the list.
* This is called repeatedly for different lists of jobs (e.g., running, completed, failed).
*/
public void generateJobTable(JspWriter out, String label, List<JobInProgress> jobs)
throws IOException {
if (jobs.size() > 0) {
for (JobInProgress job : jobs) {
JobProfile profile = job.getProfile();
JobStatus status = job.getStatus();
JobID jobid = profile.getJobID();
int desiredMaps = job.desiredMaps();
int desiredReduces = job.desiredReduces();
int completedMaps = job.finishedMaps();
int completedReduces = job.finishedReduces();
String name = profile.getJobName();
out.print("<" + label + "_job jobid=\"" + jobid + "\">\n");
out.print(" <jobid>" + jobid + "</jobid>\n");
out.print(" <user>" + profile.getUser() + "</user>\n");
out.print(" <name>" + ("".equals(name) ? " " : name) + "</name>\n");
out.print(" <map_complete>" + StringUtils.formatPercent(status.mapProgress(), 2) + "</map_complete>\n");
out.print(" <map_total>" + desiredMaps + "</map_total>\n");
out.print(" <maps_completed>" + completedMaps + "</maps_completed>\n");
out.print(" <reduce_complete>" + StringUtils.formatPercent(status.reduceProgress(), 2) + "</reduce_complete>\n");
out.print(" <reduce_total>" + desiredReduces + "</reduce_total>\n");
out.print(" <reduces_completed>" + completedReduces + "</reduces_completed>\n");
out.print("</" + label + "_job>\n");
}
}
}
/**
* Generates an XML-formatted block that summarizes the state of the JobTracker.
*/
public void generateSummaryTable(JspWriter out,
JobTracker tracker) throws IOException {
ClusterStatus status = tracker.getClusterStatus();
int maxMapTasks = status.getMaxMapTasks();
int maxReduceTasks = status.getMaxReduceTasks();
int numTaskTrackers = status.getTaskTrackers();
String tasksPerNodeStr;
if (numTaskTrackers > 0) {
double tasksPerNodePct = (double) (maxMapTasks + maxReduceTasks) / (double) numTaskTrackers;
tasksPerNodeStr = percentFormat.format(tasksPerNodePct);
} else {
tasksPerNodeStr = "-";
}
out.print("<maps>" + status.getMapTasks() + "</maps>\n" +
"<reduces>" + status.getReduceTasks() + "</reduces>\n" +
"<total_submissions>" + tracker.getTotalSubmissions() + "</total_submissions>\n" +
"<nodes>" + status.getTaskTrackers() + "</nodes>\n" +
"<map_task_capacity>" + status.getMaxMapTasks() + "</map_task_capacity>\n" +
"<reduce_task_capacity>" + status.getMaxReduceTasks() + "</reduce_task_capacity>\n" +
"<avg_tasks_per_node>" + tasksPerNodeStr + "</avg_tasks_per_node>\n");
}
}