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/**
* 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.bigtop.datagenerators.weatherman.internal;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.Writer;
import java.util.List;
import java.util.Random;
import org.apache.bigtop.datagenerators.locations.Location;
import org.apache.bigtop.datagenerators.locations.LocationReader;
import org.apache.bigtop.datagenerators.samplers.SeedFactory;
import org.apache.bigtop.datagenerators.weatherman.WeatherGenerator;
import org.apache.bigtop.datagenerators.weatherman.WeatherRecord;
import org.joda.time.DateTime;
import org.joda.time.LocalDate;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
import com.google.common.collect.Lists;
public class Driver {
List<Location> locations;
Location location;
int simulationLength;
LocalDate startDate;
SeedFactory seedFactory;
File outputDir;
static final int NPARAMS = 5;
private void printUsage() {
String usage = "BigPetStore Data Generator\n" + "\n"
+ "Usage: java -jar bigpetstore-weather-generator.java outputDir zipcode simulationLength startDate [seed]\n"
+ "\n" + "outputDir - (string) directory to write files\n"
+ "zipcode - (string) location zipcode\n"
+ "simulationLength - (int) number of days to simulate\n"
+ "startDate - (string) simulation start date in YYYY-MM-DD format\n"
+ "seed - (long) seed for RNG. If not given, one is randomly generated.\n";
System.out.println(usage);
}
private Location findLocation(String zipcode) {
for (Location location : locations) {
if (location.getZipcode().equals(zipcode))
return location;
}
return null;
}
/**
* Returns local date from string in YYYY-MM-DD format
*
* @param text
* @return
*/
private LocalDate parseDate(String text) {
DateTimeFormatter dtFormatter = DateTimeFormat.forPattern("yyyy-MM-dd");
DateTime dt = dtFormatter.parseDateTime(text);
return dt.toLocalDate();
}
public void parseArgs(String[] args) {
if (args.length != NPARAMS && args.length != (NPARAMS - 1)) {
printUsage();
System.exit(1);
}
int i = -1;
outputDir = new File(args[++i]);
if (!outputDir.exists()) {
System.err.println("Given path (" + args[i] + ") does not exist.\n");
printUsage();
System.exit(1);
}
if (!outputDir.isDirectory()) {
System.err.println("Given path (" + args[i] + ") is not a directory.\n");
printUsage();
System.exit(1);
}
location = findLocation(args[++i]);
if (location == null) {
System.err.println(
"No location found for given zipcode \"" + args[i] + "\"");
printUsage();
System.exit(1);
}
try {
simulationLength = Integer.parseInt(args[++i]);
} catch (Exception e) {
System.err.println("Unable to parse '" + args[i]
+ "' as an int for simulationLength.\n");
printUsage();
System.exit(1);
}
try {
startDate = parseDate(args[++i]);
} catch (Exception e) {
System.err.println("Unable to parse '" + args[i]
+ "'. Expected string in 'YYYY-MM-DD' format.\n");
printUsage();
System.exit(1);
}
long seed = (new Random()).nextLong();
if (args.length == NPARAMS) {
try {
seed = Long.parseLong(args[++i]);
} catch (Exception e) {
System.err.println(
"Unable to parse '" + args[i] + "' as a long for the seed.\n");
printUsage();
System.exit(1);
}
}
seedFactory = new SeedFactory(seed);
}
private void writeWeather(Location location, List<WeatherRecord> trajectory)
throws Exception {
File outputFile = new File(outputDir.toString() + File.separator
+ location.getZipcode() + ".txt");
Writer output = new BufferedWriter(new FileWriter(outputFile));
output.write(
"date,city,state,zipcode,temperature,windchill,windspeed,precipitation,rainfall,snowfall\n");
for (WeatherRecord weather : trajectory) {
String record = weather.getDate() + ",";
record += location.getCity() + ",";
record += location.getState() + ",";
record += location.getZipcode() + ",";
record += weather.getTemperature() + ",";
record += weather.getWindChill() + ",";
record += weather.getWindSpeed() + ",";
record += weather.getPrecipitation() + ",";
record += weather.getRainFall() + ",";
record += weather.getSnowFall() + "\n";
output.write(record);
}
output.close();
}
public void run(String[] args) throws Exception {
locations = new LocationReader().readData();
parseArgs(args);
WeatherGenerator generator = new WeatherGenerator(startDate, location,
seedFactory);
LocalDate date = startDate;
LocalDate endDate = startDate.plusDays(simulationLength);
List<WeatherRecord> trajectory = Lists.newArrayList();
while (date.isBefore(endDate)) {
WeatherRecord weather = generator.sample();
trajectory.add(weather);
date = weather.getDate();
}
writeWeather(location, trajectory);
}
public static void main(String[] args) throws Exception {
Driver driver = new Driver();
driver.run(args);
}
}
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