org.btrplace.plan.event.KillVM Maven / Gradle / Ivy

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/*
 * Copyright (c) 2016 University Nice Sophia Antipolis
 *
 * This file is part of btrplace.
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see .
 */

package org.btrplace.plan.event;

import org.btrplace.model.Model;
import org.btrplace.model.Node;
import org.btrplace.model.VM;
import org.btrplace.model.VMState;

import java.util.Objects;

/**
 * An action to destroy a VM that can be in any state.
 *
 * @author Fabien Hermenier
 */
public class KillVM extends Action implements VMStateTransition {

    private VM id;

    private Node host;

    /**
     * Make a new action.
     *
     * @param vm    the VM to kill
     * @param on    its location if any, {@code null} otherwise
     * @param start the moment the action starts
     * @param end   the moment the action ends
     */
    public KillVM(VM vm, Node on, int start, int end) {
        super(start, end);
        id = vm;
        this.host = on;
    }

    /**
     * Get the VM location.
     *
     * @return the node if the VM is hosted somewhere.{@code null} otherwise
     */
    public Node getNode() {
        return host;
    }

    @Override
    public VM getVM() {
        return id;
    }

    @Override
    public boolean applyAction(Model i) {
        return i.getMapping().remove(id);
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        KillVM killVM = (KillVM) o;
        return Objects.equals(id, killVM.id) && Objects.equals(host, killVM.host);
    }

    @Override
    public int hashCode() {
        return Objects.hash(getStart(), getEnd(), host, id);
    }

    @Override
    public String pretty() {
        return "killVM(vm=" + id + ", node=" + host + ')';
    }


    @Override
    public VMState getCurrentState() {
        return VMState.RUNNING;
    }

    @Override
    public VMState getNextState() {
        return VMState.KILLED;
    }

    @Override
    public Object visit(ActionVisitor v) {
        return v.visit(this);
    }
}