org.optaplanner.examples.cloudbalancing.swingui.realtime.DeleteProcessProblemChange Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of optaplanner-examples Show documentation

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.

There is a newer version: 9.44.0.Final

Show newest version

package org.optaplanner.examples.cloudbalancing.swingui.realtime;

import org.optaplanner.core.api.solver.change.ProblemChange;
import org.optaplanner.core.api.solver.change.ProblemChangeDirector;
import org.optaplanner.examples.cloudbalancing.domain.CloudBalance;
import org.optaplanner.examples.cloudbalancing.domain.CloudProcess;

public class DeleteProcessProblemChange implements ProblemChange {

    private final CloudProcess process;

    public DeleteProcessProblemChange(CloudProcess process) {
        this.process = process;
    }

    @Override
    public void doChange(CloudBalance cloudBalance, ProblemChangeDirector problemChangeDirector) {
        // A SolutionCloner clones planning entity lists (such as processList), so no need to clone the processList here
        problemChangeDirector.lookUpWorkingObject(process)
                .ifPresentOrElse(workingProcess -> {
                    // Remove the planning entity itself
                    problemChangeDirector.removeEntity(workingProcess, cloudBalance.getProcessList()::remove);
                }, () -> {
                    // The process has already been deleted (the UI asked to changed the same process twice).
                });
    }

}