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CloudSim Plus: A modern, highly extensible and easier-to-use Java 8 Framework for Modeling and Simulation of Cloud Computing Infrastructures and Services

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package org.cloudbus.cloudsim.cloudlets;

import org.cloudbus.cloudsim.datacenters.Datacenter;

/**
 * Internal class that keeps track of Cloudlet's movement in different
 * {@link Datacenter Datacenters}. Each time a cloudlet is run on a given Datacenter,
 * the Cloudlet's execution history on each Datacenter is registered inside the {@link Cloudlet}.
 * TODO There isn't Cloudlet migration, so this attribute doesn't make sense.
 *      But since a lot of methods uses it, it's removal has to be carefully assessed.
 */
final class CloudletDatacenterExecution {
    static final CloudletDatacenterExecution NULL = new CloudletDatacenterExecution();

    private double arrivalTime;
    private double wallClockTime;
    private double actualCpuTime;
    private double costPerSec;
    private long finishedSoFar;
    private Datacenter datacenter;

    CloudletDatacenterExecution() {
        this.datacenter = Datacenter.NULL;
        this.arrivalTime = Cloudlet.NOT_ASSIGNED;
    }

    /**
     * Cloudlet's submission (arrival) time to a Datacenter
     * or {@link Cloudlet#NOT_ASSIGNED} if the Cloudlet was not assigned to a Datacenter yet.
     */
    double getArrivalTime() {
        return arrivalTime;
    }

    void setArrivalTime(final double arrivalTime) {
        this.arrivalTime = arrivalTime;
    }

    /**
     * Gets the time this Cloudlet resides in a Datacenter
     * (from arrival time until departure time, that may include waiting time).
     * @return the wall-clock time (in seconds)
     * @see Elapsed real time (wall-clock time)
     */
    double getWallClockTime() {
        return wallClockTime;
    }

    /**
     * Sets the time this Cloudlet resides in a Datacenter
     * (from arrival time until departure time, that may include waiting time).
     * @param wallClockTime the wall-clock time to set (in seconds)
     * @see Elapsed real time (wall-clock time)
     */
    void setWallClockTime(final double wallClockTime) {
        this.wallClockTime = wallClockTime;
    }

    /**
     * Gets the total time the Cloudlet spent being executed in a Datacenter (in seconds).
     */
    double getActualCpuTime() {
        return actualCpuTime;
    }

    void setActualCpuTime(final double actualCpuTime) {
        this.actualCpuTime = actualCpuTime;
    }

    /**
     * Gets the cost ($) per second a Datacenter charge to execute this Cloudlet.
     */
    double getCostPerSec() {
        return costPerSec;
    }

    /**
     * Sets the cost ($) per second a Datacenter charge to execute this Cloudlet.
     * @param costPerSec the cost ($) to set
     */
    void setCostPerSec(final double costPerSec) {
        this.costPerSec = costPerSec;
    }

    /**
     * Gets Cloudlet's length finished so far (in MI).
     */
    long getFinishedSoFar() {
        return finishedSoFar;
    }

    /**
     * Adds the partial length of this Cloudlet that has executed so far in this Datacenter (in MI).
     *
     * @param partialFinishedMI the partial executed length of this Cloudlet (in MI)
     *                          from the last time span (the last time the Cloudlet execution was updated)
     */
    void addFinishedSoFar(final long partialFinishedMI) {
        this.finishedSoFar += partialFinishedMI;
    }

    void clearFinishedSoFar() {
        this.finishedSoFar = 0;
    }

    /**
     * Gets the Datacenter where the Cloudlet will be executed
     */
    Datacenter getDatacenter() {
        return datacenter;
    }

    void setDatacenter(final Datacenter datacenter) {
        this.datacenter = datacenter;
    }
}