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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.

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/*
 * Copyright 2016 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.cloudbalancing.optional.realtime;

import org.optaplanner.core.impl.score.director.ScoreDirector;
import org.optaplanner.core.impl.solver.ProblemFactChange;
import org.optaplanner.examples.cloudbalancing.domain.CloudBalance;
import org.optaplanner.examples.cloudbalancing.domain.CloudProcess;

public class AddProcessProblemFactChange implements ProblemFactChange {

    private final CloudProcess process;

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

    @Override
    public void doChange(ScoreDirector scoreDirector) {
        CloudBalance cloudBalance = scoreDirector.getWorkingSolution();
        // Set a unique id on the new process
        long nextProcessId = 0L;
        for (CloudProcess otherProcess : cloudBalance.getProcessList()) {
            if (nextProcessId <= otherProcess.getId()) {
                nextProcessId = otherProcess.getId() + 1L;
            }
        }
        process.setId(nextProcessId);
        // A SolutionCloner clones planning entity lists (such as processList), so no need to clone the processList here
        // Add the planning entity itself
        scoreDirector.beforeEntityAdded(process);
        cloudBalance.getProcessList().add(process);
        scoreDirector.afterEntityAdded(process);
        scoreDirector.triggerVariableListeners();
    }

}