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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 2021 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.cheaptime.persistence;
import java.io.IOException;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import org.optaplanner.examples.cheaptime.app.CheapTimeApp;
import org.optaplanner.examples.cheaptime.domain.CheapTimeSolution;
import org.optaplanner.examples.cheaptime.domain.Machine;
import org.optaplanner.examples.cheaptime.domain.Period;
import org.optaplanner.examples.cheaptime.domain.TaskAssignment;
import org.optaplanner.examples.cheaptime.score.CheapTimeCostCalculator;
import org.optaplanner.examples.common.persistence.AbstractTxtSolutionExporter;
import org.optaplanner.examples.common.persistence.SolutionConverter;
public class CheapTimeExporter extends AbstractTxtSolutionExporter {
public static void main(String[] args) {
SolutionConverter converter = SolutionConverter.createExportConverter(
CheapTimeApp.DATA_DIR_NAME, CheapTimeSolution.class, new CheapTimeExporter());
converter.convertAll();
}
@Override
public String getOutputFileSuffix() {
return "txt";
}
@Override
public TxtOutputBuilder createTxtOutputBuilder() {
return new CheapTimeOutputBuilder();
}
public static class CheapTimeOutputBuilder extends TxtOutputBuilder {
@Override
public void writeSolution() throws IOException {
int globalPeriodRangeTo = solution.getGlobalPeriodRangeTo();
List machineList = solution.getMachineList();
List periodList = solution.getPeriodList();
bufferedWriter.write(machineList.size() + "\n");
Map> machinePeriodActiveListMap = createMachinePeriodActiveListMap(machineList);
for (Machine machine : machineList) {
bufferedWriter.write(machine.getId() + "\n");
List periodActiveList = machinePeriodActiveListMap.get(machine);
int spinCount = 0;
StringBuilder spinUpDownLines = new StringBuilder("");
MachinePeriodStatus previousStatus = MachinePeriodStatus.OFF;
long idleCostMicros = 0L;
int lastSpinDown = Integer.MIN_VALUE;
for (int i = 0; i < globalPeriodRangeTo; i++) {
boolean active = periodActiveList.get(i);
if (active) {
if (previousStatus == MachinePeriodStatus.OFF) {
if (lastSpinDown >= 0) {
spinCount++;
spinUpDownLines.append("0 ").append(lastSpinDown).append("\n");
lastSpinDown = Integer.MIN_VALUE;
}
// Spin up
spinCount++;
spinUpDownLines.append("1 ").append(i).append("\n");
}
previousStatus = MachinePeriodStatus.ACTIVE;
} else {
if (previousStatus != MachinePeriodStatus.OFF) {
if (previousStatus == MachinePeriodStatus.ACTIVE) {
lastSpinDown = i - 1;
}
Period period = periodList.get(i);
idleCostMicros += CheapTimeCostCalculator.multiplyTwoMicros(
machine.getPowerConsumptionMicros(), period.getPowerPriceMicros());
if (idleCostMicros > machine.getSpinUpDownCostMicros()) {
idleCostMicros = 0L;
previousStatus = MachinePeriodStatus.OFF;
} else {
previousStatus = MachinePeriodStatus.IDLE;
}
}
}
}
if (previousStatus == MachinePeriodStatus.ACTIVE) {
lastSpinDown = globalPeriodRangeTo - 1;
}
if (lastSpinDown >= 0) {
spinCount++;
spinUpDownLines.append("0 ").append(lastSpinDown).append("\n");
lastSpinDown = Integer.MIN_VALUE;
}
bufferedWriter.write(spinCount + "\n");
bufferedWriter.write(spinUpDownLines.toString());
}
List taskAssignmentList = solution.getTaskAssignmentList();
bufferedWriter.write(taskAssignmentList.size() + "\n");
for (TaskAssignment taskAssignment : taskAssignmentList) {
bufferedWriter.write(taskAssignment.getTask().getId() + " "
+ taskAssignment.getMachine().getId() + " "
+ taskAssignment.getStartPeriod() + "\n");
}
}
private Map> createMachinePeriodActiveListMap(List machineList) {
Map> machinePeriodActiveListMap = new LinkedHashMap<>(machineList.size());
if (solution.getGlobalPeriodRangeFrom() != 0) {
throw new IllegalStateException("The globalPeriodRangeFrom (" + solution.getGlobalPeriodRangeFrom()
+ ") should be 0.");
}
for (Machine machine : machineList) {
ArrayList periodActiveList = new ArrayList<>(solution.getGlobalPeriodRangeTo());
for (int i = 0; i < solution.getGlobalPeriodRangeTo(); i++) {
periodActiveList.add(false);
}
machinePeriodActiveListMap.put(machine, periodActiveList);
}
for (TaskAssignment taskAssignment : solution.getTaskAssignmentList()) {
for (int i = taskAssignment.getStartPeriod(); i < taskAssignment.getEndPeriod(); i++) {
machinePeriodActiveListMap.get(taskAssignment.getMachine()).set(i, true);
}
}
return machinePeriodActiveListMap;
}
private enum MachinePeriodStatus {
OFF,
IDLE,
ACTIVE;
}
}
}