org.coos.messaging.routing.DirectAlgorithm Maven / Gradle / Ivy

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/**
 * COOS - Connected Objects Operating System (www.connectedobjects.org).
 *
 * Copyright (C) 2009 Telenor ASA and Tellu AS. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * 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 program 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 .
 *
 * You may also contact one of the following for additional information:
 * Telenor ASA, Snaroyveien 30, N-1331 Fornebu, Norway (www.telenor.no)
 * Tellu AS, Hagalokkveien 13, N-1383 Asker, Norway (www.tellu.no)
 */
package org.coos.messaging.routing;

import java.util.Collection;
import java.util.Iterator;
import java.util.Map;

import org.coos.messaging.Link;
import org.coos.messaging.Message;

/**
 * @author Knut Eilif Husa, Tellu AS This routing algorithm is only applicable
 *         for a segment consisting of one node. It does not exchange
 *         routinginfo with other router nodes.
 */
public class DirectAlgorithm extends DefaultRoutingAlgorithm {

	public DirectAlgorithm() {
	}

	public void init(String routerUuid, Router router, Map properties) {
		super.init(routerUuid, router, properties);
	}

	public void processRoutingInfo(Message routingInfo) {
		// No routing info processed
	}

	public void publishLink(Link link) {
		Iterator iter = routingTables.keySet().iterator();

		while (iter.hasNext()) {
			String qos = iter.next();
			Map routingTable = routingTables.get(qos);
			if (link.getCost() < LinkCost.MAX_VALUE) {
				routingTable.put(link.getDestinationUuid(), link);
				Collection aliases = link.getAlises();
				for (Iterator iterator = aliases.iterator(); iterator.hasNext();) {
					String alias = (String) iterator.next();
					aliasTable.put(alias, link.getDestinationUuid());
				}

			} else {
				routingTable.remove(link.getDestinationUuid());
				Collection aliases = link.getAlises();
				for (Iterator iterator = aliases.iterator(); iterator.hasNext();) {
					String alias = (String) iterator.next();
					aliasTable.remove(alias);
				}
			}
			if (loggingEnabled) {
				printRoutingTable(routerUuid, qos, routingTables.get(qos), logger);
			}
		}

	}

	public void start() throws Exception {
		// No service
	}

	public void stop() throws Exception {
		// No service
	}
}