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OptaPlanner solves planning problems.
This lightweight, embeddable planning engine implements powerful and scalable algorithms
to optimize business resource scheduling and planning.
This module contains the examples which demonstrate how to use it in a normal Java application.
/*
* Copyright 2015 Red Hat, Inc. and/or its affiliates.
*
* Licensed 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.optaplanner.examples.meetingscheduling.persistence;
import java.io.File;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import org.optaplanner.examples.common.app.CommonApp;
import org.optaplanner.examples.common.app.LoggingMain;
import org.optaplanner.examples.common.persistence.AbstractSolutionImporter;
import org.optaplanner.examples.common.persistence.generator.StringDataGenerator;
import org.optaplanner.examples.meetingscheduling.app.MeetingSchedulingApp;
import org.optaplanner.examples.meetingscheduling.domain.Attendance;
import org.optaplanner.examples.meetingscheduling.domain.Day;
import org.optaplanner.examples.meetingscheduling.domain.Meeting;
import org.optaplanner.examples.meetingscheduling.domain.MeetingAssignment;
import org.optaplanner.examples.meetingscheduling.domain.MeetingConstraintConfiguration;
import org.optaplanner.examples.meetingscheduling.domain.MeetingSchedule;
import org.optaplanner.examples.meetingscheduling.domain.Person;
import org.optaplanner.examples.meetingscheduling.domain.PreferredAttendance;
import org.optaplanner.examples.meetingscheduling.domain.RequiredAttendance;
import org.optaplanner.examples.meetingscheduling.domain.Room;
import org.optaplanner.examples.meetingscheduling.domain.TimeGrain;
import org.optaplanner.persistence.common.api.domain.solution.SolutionFileIO;
public class MeetingSchedulingGenerator extends LoggingMain {
public static void main(String[] args) {
MeetingSchedulingGenerator generator = new MeetingSchedulingGenerator();
generator.writeMeetingSchedule(50, 5);
generator.writeMeetingSchedule(100, 5);
generator.writeMeetingSchedule(200, 5);
generator.writeMeetingSchedule(400, 5);
generator.writeMeetingSchedule(800, 5);
}
private final StringDataGenerator topicGenerator = new StringDataGenerator()
.addPart(true, 0,
"Strategize",
"Fast track",
"Cross sell",
"Profitize",
"Transform",
"Engage",
"Downsize",
"Ramp up",
"On board",
"Reinvigorate")
.addPart(false, 1,
"data driven",
"sales driven",
"compelling",
"reusable",
"negotiated",
"sustainable",
"laser-focused",
"flexible",
"real-time",
"targeted")
.addPart(true, 1,
"B2B",
"e-business",
"virtualization",
"multitasking",
"one stop shop",
"braindumps",
"data mining",
"policies",
"synergies",
"user experience")
.addPart(false, 3,
"in a nutshell",
"in practice",
"for dummies",
"in action",
"recipes",
"on the web",
"for decision makers",
"on the whiteboard",
"out of the box",
"in the new economy");
private final int[] durationInGrainsOptions = {
1, // 15 mins
2, // 30 mins
3, // 45 mins
4, // 1 hour
6, // 90 mins
8, // 2 hours
16, // 4 hours
};
private final int[] personsPerMeetingOptions = {
2,
3,
4,
5,
6,
8,
10,
12,
14,
16,
20,
30,
};
private final int[] startingMinuteOfDayOptions = {
8 * 60, // 08:00
8 * 60 + 15, // 08:15
8 * 60 + 30, // 08:30
8 * 60 + 45, // 08:45
9 * 60, // 09:00
9 * 60 + 15, // 09:15
9 * 60 + 30, // 09:30
9 * 60 + 45, // 09:45
10 * 60, // 10:00
10 * 60 + 15, // 10:15
10 * 60 + 30, // 10:30
10 * 60 + 45, // 10:45
11 * 60, // 11:00
11 * 60 + 15, // 11:15
11 * 60 + 30, // 11:30
11 * 60 + 45, // 11:45
13 * 60, // 13:00
13 * 60 + 15, // 13:15
13 * 60 + 30, // 13:30
13 * 60 + 45, // 13:45
14 * 60, // 14:00
14 * 60 + 15, // 14:15
14 * 60 + 30, // 14:30
14 * 60 + 45, // 14:45
15 * 60, // 15:00
15 * 60 + 15, // 15:15
15 * 60 + 30, // 15:30
15 * 60 + 45, // 15:45
16 * 60, // 16:00
16 * 60 + 15, // 16:15
16 * 60 + 30, // 16:30
16 * 60 + 45, // 16:45
17 * 60, // 17:00
17 * 60 + 15, // 17:15
17 * 60 + 30, // 17:30
17 * 60 + 45, // 17:45
};
private final StringDataGenerator fullNameGenerator = StringDataGenerator.buildFullNames();
protected final SolutionFileIO solutionFileIO;
protected final File outputDir;
protected Random random;
public MeetingSchedulingGenerator() {
solutionFileIO = new MeetingSchedulingXlsxFileIO();
outputDir = new File(CommonApp.determineDataDir(MeetingSchedulingApp.DATA_DIR_NAME), "unsolved");
}
private void writeMeetingSchedule(int meetingListSize, int roomListSize) {
int timeGrainListSize = meetingListSize * durationInGrainsOptions[durationInGrainsOptions.length - 1] / roomListSize;
String fileName = determineFileName(meetingListSize, timeGrainListSize, roomListSize);
File outputFile = new File(outputDir, fileName + "." + solutionFileIO.getOutputFileExtension());
MeetingSchedule meetingSchedule = createMeetingSchedule(fileName, meetingListSize, timeGrainListSize, roomListSize);
solutionFileIO.write(meetingSchedule, outputFile);
logger.info("Saved: {}", outputFile);
}
private String determineFileName(int meetingListSize, int timeGrainListSize, int roomListSize) {
return meetingListSize + "meetings-" + timeGrainListSize + "timegrains-" + roomListSize + "rooms";
}
public MeetingSchedule createMeetingSchedule(String fileName, int meetingListSize, int timeGrainListSize,
int roomListSize) {
random = new Random(37);
MeetingSchedule meetingSchedule = new MeetingSchedule();
meetingSchedule.setId(0L);
MeetingConstraintConfiguration constraintConfiguration = new MeetingConstraintConfiguration();
constraintConfiguration.setId(0L);
meetingSchedule.setConstraintConfiguration(constraintConfiguration);
createMeetingListAndAttendanceList(meetingSchedule, meetingListSize);
createTimeGrainList(meetingSchedule, timeGrainListSize);
createRoomList(meetingSchedule, roomListSize);
createPersonList(meetingSchedule);
linkAttendanceListToPersons(meetingSchedule);
createMeetingAssignmentList(meetingSchedule);
BigInteger possibleSolutionSize = BigInteger.valueOf((long) timeGrainListSize * roomListSize)
.pow(meetingSchedule.getMeetingAssignmentList().size());
logger.info("MeetingSchedule {} has {} meetings, {} timeGrains and {} rooms with a search space of {}.",
fileName,
meetingListSize,
timeGrainListSize,
roomListSize,
AbstractSolutionImporter.getFlooredPossibleSolutionSize(possibleSolutionSize));
return meetingSchedule;
}
private void createMeetingListAndAttendanceList(MeetingSchedule meetingSchedule, int meetingListSize) {
List meetingList = new ArrayList<>(meetingListSize);
List globalAttendanceList = new ArrayList<>();
long attendanceId = 0L;
topicGenerator.predictMaximumSizeAndReset(meetingListSize);
for (int i = 0; i < meetingListSize; i++) {
Meeting meeting = new Meeting();
meeting.setId((long) i);
String topic = topicGenerator.generateNextValue();
meeting.setTopic(topic);
int durationInGrains = durationInGrainsOptions[random.nextInt(durationInGrainsOptions.length)];
meeting.setDurationInGrains(durationInGrains);
int attendanceListSize = personsPerMeetingOptions[random.nextInt(personsPerMeetingOptions.length)];
int requiredAttendanceListSize = Math.max(2, random.nextInt(attendanceListSize + 1));
List requiredAttendanceList = new ArrayList<>(requiredAttendanceListSize);
for (int j = 0; j < requiredAttendanceListSize; j++) {
RequiredAttendance attendance = new RequiredAttendance();
attendance.setId(attendanceId);
attendanceId++;
attendance.setMeeting(meeting);
// person is filled in later
requiredAttendanceList.add(attendance);
globalAttendanceList.add(attendance);
}
meeting.setRequiredAttendanceList(requiredAttendanceList);
int preferredAttendanceListSize = attendanceListSize - requiredAttendanceListSize;
List preferredAttendanceList = new ArrayList<>(preferredAttendanceListSize);
for (int j = 0; j < preferredAttendanceListSize; j++) {
PreferredAttendance attendance = new PreferredAttendance();
attendance.setId(attendanceId);
attendanceId++;
attendance.setMeeting(meeting);
// person is filled in later
preferredAttendanceList.add(attendance);
globalAttendanceList.add(attendance);
}
meeting.setPreferredAttendanceList(preferredAttendanceList);
logger.trace("Created meeting with topic ({}), durationInGrains ({}),"
+ " requiredAttendanceListSize ({}), preferredAttendanceListSize ({}).",
topic, durationInGrains,
requiredAttendanceListSize, preferredAttendanceListSize);
meetingList.add(meeting);
}
meetingSchedule.setMeetingList(meetingList);
meetingSchedule.setAttendanceList(globalAttendanceList);
}
private void createTimeGrainList(MeetingSchedule meetingSchedule, int timeGrainListSize) {
List dayList = new ArrayList<>(timeGrainListSize);
long dayId = 0;
Day day = null;
List timeGrainList = new ArrayList<>(timeGrainListSize);
for (int i = 0; i < timeGrainListSize; i++) {
TimeGrain timeGrain = new TimeGrain();
timeGrain.setId((long) i);
int grainIndex = i;
timeGrain.setGrainIndex(grainIndex);
int dayOfYear = (i / startingMinuteOfDayOptions.length) + 1;
if (day == null || day.getDayOfYear() != dayOfYear) {
day = new Day();
day.setId(dayId);
day.setDayOfYear(dayOfYear);
dayId++;
dayList.add(day);
}
timeGrain.setDay(day);
int startingMinuteOfDay = startingMinuteOfDayOptions[i % startingMinuteOfDayOptions.length];
timeGrain.setStartingMinuteOfDay(startingMinuteOfDay);
logger.trace("Created timeGrain with grainIndex ({}), dayOfYear ({}), startingMinuteOfDay ({}).",
grainIndex, dayOfYear, startingMinuteOfDay);
timeGrainList.add(timeGrain);
}
meetingSchedule.setDayList(dayList);
meetingSchedule.setTimeGrainList(timeGrainList);
}
private void createRoomList(MeetingSchedule meetingSchedule, int roomListSize) {
final int roomsPerFloor = 20;
List roomList = new ArrayList<>(roomListSize);
for (int i = 0; i < roomListSize; i++) {
Room room = new Room();
room.setId((long) i);
String name = "R " + ((i / roomsPerFloor * 100) + (i % roomsPerFloor) + 1);
room.setName(name);
int capacityOptionsSubsetSize = personsPerMeetingOptions.length * 3 / 4;
int capacity = personsPerMeetingOptions[personsPerMeetingOptions.length - (i % capacityOptionsSubsetSize) - 1];
room.setCapacity(capacity);
logger.trace("Created room with name ({}), capacity ({}).",
name, capacity);
roomList.add(room);
}
meetingSchedule.setRoomList(roomList);
}
private void createPersonList(MeetingSchedule meetingSchedule) {
int attendanceListSize = 0;
for (Meeting meeting : meetingSchedule.getMeetingList()) {
attendanceListSize += meeting.getRequiredAttendanceList().size()
+ meeting.getPreferredAttendanceList().size();
}
int personListSize = attendanceListSize * meetingSchedule.getRoomList().size() * 3
/ (4 * meetingSchedule.getMeetingList().size());
List personList = new ArrayList<>(personListSize);
fullNameGenerator.predictMaximumSizeAndReset(personListSize);
for (int i = 0; i < personListSize; i++) {
Person person = new Person();
person.setId((long) i);
String fullName = fullNameGenerator.generateNextValue();
person.setFullName(fullName);
logger.trace("Created person with fullName ({}).",
fullName);
personList.add(person);
}
meetingSchedule.setPersonList(personList);
}
private void linkAttendanceListToPersons(MeetingSchedule meetingSchedule) {
for (Meeting meeting : meetingSchedule.getMeetingList()) {
List availablePersonList = new ArrayList<>(meetingSchedule.getPersonList());
int attendanceListSize = meeting.getRequiredAttendanceList().size() + meeting.getPreferredAttendanceList().size();
if (availablePersonList.size() < attendanceListSize) {
throw new IllegalStateException("The availablePersonList size (" + availablePersonList.size()
+ ") is less than the attendanceListSize (" + attendanceListSize + ").");
}
for (RequiredAttendance requiredAttendance : meeting.getRequiredAttendanceList()) {
requiredAttendance.setPerson(availablePersonList.remove(random.nextInt(availablePersonList.size())));
}
for (PreferredAttendance preferredAttendance : meeting.getPreferredAttendanceList()) {
preferredAttendance.setPerson(availablePersonList.remove(random.nextInt(availablePersonList.size())));
}
}
}
private void createMeetingAssignmentList(MeetingSchedule meetingSchedule) {
List meetingList = meetingSchedule.getMeetingList();
List meetingAssignmentList = new ArrayList<>(meetingList.size());
for (Meeting meeting : meetingList) {
MeetingAssignment meetingAssignment = new MeetingAssignment();
meetingAssignment.setId(meeting.getId());
meetingAssignment.setMeeting(meeting);
meetingAssignmentList.add(meetingAssignment);
}
meetingSchedule.setMeetingAssignmentList(meetingAssignmentList);
}
}