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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 2010 JBoss Inc
*
* 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.cloudbalancing.swingui;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.swing.AbstractAction;
import javax.swing.GroupLayout;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import org.apache.commons.lang.ObjectUtils;
import org.optaplanner.core.impl.score.director.ScoreDirector;
import org.optaplanner.core.api.domain.solution.Solution;
import org.optaplanner.core.impl.solver.ProblemFactChange;
import org.optaplanner.examples.cloudbalancing.domain.CloudBalance;
import org.optaplanner.examples.cloudbalancing.domain.CloudComputer;
import org.optaplanner.examples.cloudbalancing.domain.CloudProcess;
import org.optaplanner.examples.common.swingui.SolutionPanel;
public class CloudBalancingPanel extends SolutionPanel {
public static final String LOGO_PATH = "/org/optaplanner/examples/cloudbalancing/swingui/cloudBalancingLogo.png";
private final ImageIcon cloudComputerIcon;
private final ImageIcon deleteCloudComputerIcon;
private JPanel computersPanel;
private CloudComputerPanel unassignedPanel;
private Map computerToPanelMap;
private int maximumComputerCpuPower;
private int maximumComputerMemory;
private int maximumComputerNetworkBandwidth;
public CloudBalancingPanel() {
cloudComputerIcon = new ImageIcon(getClass().getResource("cloudComputer.png"));
deleteCloudComputerIcon = new ImageIcon(getClass().getResource("deleteCloudComputer.png"));
GroupLayout layout = new GroupLayout(this);
setLayout(layout);
JPanel headerPanel = createHeaderPanel();
JPanel computersPanel = createComputersPanel();
layout.setHorizontalGroup(layout.createParallelGroup()
.addComponent(headerPanel).addComponent(computersPanel));
layout.setVerticalGroup(layout.createSequentialGroup()
.addComponent(headerPanel, GroupLayout.PREFERRED_SIZE, GroupLayout.PREFERRED_SIZE,
GroupLayout.PREFERRED_SIZE)
.addComponent(computersPanel, GroupLayout.PREFERRED_SIZE, GroupLayout.PREFERRED_SIZE,
GroupLayout.PREFERRED_SIZE));
}
public ImageIcon getCloudComputerIcon() {
return cloudComputerIcon;
}
public ImageIcon getDeleteCloudComputerIcon() {
return deleteCloudComputerIcon;
}
public int getMaximumComputerCpuPower() {
return maximumComputerCpuPower;
}
public int getMaximumComputerMemory() {
return maximumComputerMemory;
}
public int getMaximumComputerNetworkBandwidth() {
return maximumComputerNetworkBandwidth;
}
private JPanel createHeaderPanel() {
JPanel headerPanel = new JPanel(new GridLayout(0, 5));
JLabel emptyLabel = new JLabel("");
headerPanel.add(emptyLabel);
JLabel cpuPowerLabel = new JLabel("CPU power");
headerPanel.add(cpuPowerLabel);
JLabel memoryLabel = new JLabel("Memory");
headerPanel.add(memoryLabel);
JLabel networkBandwidthLabel = new JLabel("Network bandwidth");
headerPanel.add(networkBandwidthLabel);
JLabel costLabel = new JLabel("Cost");
headerPanel.add(costLabel);
return headerPanel;
}
private JPanel createComputersPanel() {
computersPanel = new JPanel(new GridLayout(0, 1));
computerToPanelMap = new LinkedHashMap();
return computersPanel;
}
@Override
public boolean isRefreshScreenDuringSolving() {
return true;
}
private CloudBalance getCloudBalance() {
return (CloudBalance) solutionBusiness.getSolution();
}
public void resetPanel(Solution solution) {
CloudBalance cloudBalance = (CloudBalance) solution;
maximumComputerCpuPower = 0;
maximumComputerMemory = 0;
maximumComputerNetworkBandwidth = 0;
for (CloudComputer computer : cloudBalance.getComputerList()) {
if (computer.getCpuPower() > maximumComputerCpuPower) {
maximumComputerCpuPower = computer.getCpuPower();
}
if (computer.getMemory() > maximumComputerMemory) {
maximumComputerMemory = computer.getMemory();
}
if (computer.getNetworkBandwidth() > maximumComputerNetworkBandwidth) {
maximumComputerNetworkBandwidth = computer.getNetworkBandwidth();
}
}
for (CloudComputerPanel computerPanel : computerToPanelMap.values()) {
if (computerPanel.getComputer() != null) {
computersPanel.remove(computerPanel);
}
}
computerToPanelMap.clear();
computersPanel.removeAll();
unassignedPanel = new CloudComputerPanel(this, null);
computersPanel.add(unassignedPanel);
computerToPanelMap.put(null, unassignedPanel);
updatePanel(solution);
}
@Override
public void updatePanel(Solution solution) {
CloudBalance cloudBalance = (CloudBalance) solution;
Set deadCloudComputerSet = new LinkedHashSet(computerToPanelMap.keySet());
deadCloudComputerSet.remove(null);
for (CloudComputer computer : cloudBalance.getComputerList()) {
deadCloudComputerSet.remove(computer);
CloudComputerPanel computerPanel = computerToPanelMap.get(computer);
if (computerPanel == null) {
computerPanel = new CloudComputerPanel(this, computer);
computersPanel.add(computerPanel);
computerToPanelMap.put(computer, computerPanel);
}
computerPanel.clearProcesses();
}
unassignedPanel.clearProcesses();
for (CloudProcess process : cloudBalance.getProcessList()) {
CloudComputer computer = process.getComputer();
CloudComputerPanel computerPanel = computerToPanelMap.get(computer);
computerPanel.addProcess(process);
}
for (CloudComputer deadComputer : deadCloudComputerSet) {
CloudComputerPanel deadComputerPanel = computerToPanelMap.remove(deadComputer);
computersPanel.remove(deadComputerPanel);
}
for (CloudComputerPanel computerPanel : computerToPanelMap.values()) {
computerPanel.update();
}
// If computersPanel.add() or computersPanel.remove() was called, the component needs to be validated.
computersPanel.validate();
}
public void deleteComputer(final CloudComputer computer) {
logger.info("Scheduling delete of computer ({}).", computer);
solutionBusiness.doProblemFactChange(new ProblemFactChange() {
public void doChange(ScoreDirector scoreDirector) {
CloudBalance cloudBalance = (CloudBalance) scoreDirector.getWorkingSolution();
// First remove the planning fact from all planning entities that use it
for (CloudProcess process : cloudBalance.getProcessList()) {
if (ObjectUtils.equals(process.getComputer(), computer)) {
// TODO HACK we are removing it because it becomes uninitialized,
// which means it has to be retracted
// This is nonsense from a ProblemFactChange point of view, FIXME!
scoreDirector.beforeEntityRemoved(process);
process.setComputer(null);
scoreDirector.afterEntityRemoved(process);
}
}
// A SolutionCloner does not clone problem fact lists (such as computerList)
// Shallow clone the computerList so only workingSolution is affected, not bestSolution or guiSolution
cloudBalance.setComputerList(new ArrayList(cloudBalance.getComputerList()));
// Next remove it the planning fact itself
for (Iterator it = cloudBalance.getComputerList().iterator(); it.hasNext(); ) {
CloudComputer workingComputer = it.next();
if (ObjectUtils.equals(workingComputer, computer)) {
scoreDirector.beforeProblemFactRemoved(workingComputer);
it.remove(); // remove from list
scoreDirector.beforeProblemFactRemoved(workingComputer);
break;
}
}
}
});
updatePanel(solutionBusiness.getSolution());
}
public JButton createButton(CloudProcess process) {
JButton button = new JButton(new CloudProcessAction(process));
button.setMargin(new Insets(0, 0, 0, 0));
return button;
}
private class CloudProcessAction extends AbstractAction {
private CloudProcess process;
public CloudProcessAction(CloudProcess process) {
super(process.getLabel());
this.process = process;
}
public void actionPerformed(ActionEvent e) {
JPanel listFieldsPanel = new JPanel(new GridLayout(1, 2));
listFieldsPanel.add(new JLabel("Computer:"));
List periodList = getCloudBalance().getComputerList();
JComboBox computerListField = new JComboBox(periodList.toArray());
computerListField.setSelectedItem(process.getComputer());
listFieldsPanel.add(computerListField);
int result = JOptionPane.showConfirmDialog(CloudBalancingPanel.this.getRootPane(), listFieldsPanel,
"Select computer", JOptionPane.OK_CANCEL_OPTION);
if (result == JOptionPane.OK_OPTION) {
CloudComputer toComputer = (CloudComputer) computerListField.getSelectedItem();
if (process.getComputer() != toComputer) {
solutionBusiness.doChangeMove(process, "computer", toComputer);
}
solverAndPersistenceFrame.resetScreen();
}
}
}
}