jasima.shopSim.core.IndividualMachine Maven / Gradle / Ivy

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/*******************************************************************************
 * Copyright (c) 2010-2015 Torsten Hildebrandt and jasima contributors
 *
 * This file is part of jasima, v1.2.
 *
 * jasima is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * jasima 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with jasima.  If not, see .
 *******************************************************************************/
package jasima.shopSim.core;

import jasima.core.simulation.Event;

import java.util.Collections;
import java.util.List;

/**
 * This class represents a single machine, which is part of a
 * {@link WorkStation}.
 * 
 * @author Torsten Hildebrandt 
 * @version 
 *          "$Id: IndividualMachine.java 550 2015-01-23 15:07:23Z [email protected] $"
 */
public class IndividualMachine {

	public enum MachineState {
		DOWN, IDLE, WORKING
	}

	public final WorkStation workStation; // the workstation this machine
											// belongs to
	public final int idx; // index in workStation.machDat

	public double relDate;
	public int initialSetup;
	public String name = null;
	public List downsources = Collections.EMPTY_LIST;

	public MachineState state;
	public DowntimeSource downReason;
	public double procStarted;
	public double procFinished;
	public int setupState;
	public PrioRuleTarget curJob;

	public IndividualMachine(WorkStation workStation, int idx) {
		super();
		this.workStation = workStation;
		this.idx = idx;

		state = MachineState.DOWN;
		initialSetup = WorkStation.DEF_SETUP;
		relDate = 0.0;
	}

	// called whenever an operation is finished
	Event onDepart = new Event(0.0d, WorkStation.DEPART_PRIO) {
		@Override
		public void handle() {
			workStation.currMachine = IndividualMachine.this;
			workStation.depart();
			workStation.currMachine = null;
		}
	};

	/** Activation from DOWN state. */
	public void activate() {
		if (state != MachineState.DOWN)
			throw new IllegalStateException(
					"Only a machine in state DOWN can be activated.");
		assert curJob == null;

		state = MachineState.IDLE;
		procFinished = -1.0d;
		procStarted = -1.0d;

		workStation.activated(this);
		
		downReason = null;
	}

	/**
	 * Machine going down for a certain amount of time. If this machine is
	 * already down or currently processing, this operation is finished before
	 * the new downtime can become active.
	 */
	public void takeDown(final DowntimeSource downReason) {
		final JobShop shop = workStation.shop();

		if (state != MachineState.IDLE) {
			assert procFinished > shop.simTime();
			assert curJob != null || state == MachineState.DOWN;

			// don't interrupt ongoing operation/downtime, postpone takeDown
			// instead
			shop.schedule(new Event(procFinished, WorkStation.TAKE_DOWN_PRIO) {
				@Override
				public void handle() {
					assert workStation.currMachine == null;
					workStation.currMachine = IndividualMachine.this;
					takeDown(downReason);
					workStation.currMachine = null;
				}
			});
		} else {
			assert state == MachineState.IDLE;

			procStarted = shop.simTime();
			procFinished = shop.simTime();
			state = MachineState.DOWN;
			this.downReason = downReason; 
			curJob = null;

			workStation.takenDown(this);
		}
	}

	protected void init() {
		setupState = initialSetup;
		procFinished = relDate;
		procStarted = 0.0;
		state = MachineState.DOWN;

		// schedule initial activation
		workStation.shop
				.schedule(new Event(relDate, WorkStation.ACTIVATE_PRIO) {
					@Override
					public void handle() {
						assert workStation.currMachine == null;
						workStation.currMachine = IndividualMachine.this;
						IndividualMachine.this.activate();
						workStation.currMachine = null;
					}
				});

		// init downsources
		for (DowntimeSource ds : downsources) {
			ds.init();
		}
	}

	@Override
	public String toString() {
		if (name == null)
			name = workStation.getName()
					+ (workStation.numInGroup() > 1 ? "." + idx : "");
		return name;
	}

}