| /* |
| * Copyright 2014 Open Networking Laboratory |
| * |
| * 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.onlab.onos.net.intent.impl; |
| |
| import org.apache.felix.scr.annotations.Activate; |
| import org.apache.felix.scr.annotations.Component; |
| import org.apache.felix.scr.annotations.Deactivate; |
| import org.apache.felix.scr.annotations.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.onlab.onos.net.ConnectPoint; |
| import org.onlab.onos.net.DefaultEdgeLink; |
| import org.onlab.onos.net.DefaultPath; |
| import org.onlab.onos.net.Link; |
| import org.onlab.onos.net.Path; |
| import org.onlab.onos.net.intent.Intent; |
| import org.onlab.onos.net.intent.IntentCompiler; |
| import org.onlab.onos.net.intent.IntentExtensionService; |
| import org.onlab.onos.net.intent.PathIntent; |
| import org.onlab.onos.net.intent.PointToPointIntent; |
| import org.onlab.onos.net.provider.ProviderId; |
| import org.onlab.onos.net.topology.LinkWeight; |
| import org.onlab.onos.net.topology.Topology; |
| import org.onlab.onos.net.topology.TopologyEdge; |
| import org.onlab.onos.net.topology.TopologyService; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Set; |
| |
| import static java.util.Arrays.asList; |
| |
| /** |
| * An intent compiler for {@link org.onlab.onos.net.intent.PointToPointIntent}. |
| */ |
| @Component(immediate = true) |
| public class PointToPointIntentCompiler |
| implements IntentCompiler<PointToPointIntent> { |
| |
| private static final ProviderId PID = new ProviderId("core", "org.onlab.onos.core", true); |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected IntentExtensionService intentManager; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected TopologyService topologyService; |
| |
| @Activate |
| public void activate() { |
| intentManager.registerCompiler(PointToPointIntent.class, this); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| intentManager.unregisterCompiler(PointToPointIntent.class); |
| } |
| |
| @Override |
| public List<Intent> compile(PointToPointIntent intent) { |
| Path path = getPath(intent.ingressPoint(), intent.egressPoint()); |
| |
| List<Link> links = new ArrayList<>(); |
| links.add(DefaultEdgeLink.createEdgeLink(intent.ingressPoint(), true)); |
| links.addAll(path.links()); |
| links.add(DefaultEdgeLink.createEdgeLink(intent.egressPoint(), false)); |
| |
| return asList(createPathIntent(new DefaultPath(PID, links, path.cost() + 2, |
| path.annotations()), intent)); |
| } |
| |
| /** |
| * Creates a path intent from the specified path and original |
| * connectivity intent. |
| * |
| * @param path path to create an intent for |
| * @param intent original intent |
| */ |
| private Intent createPathIntent(Path path, |
| PointToPointIntent intent) { |
| return new PathIntent(intent.appId(), |
| intent.selector(), intent.treatment(), path); |
| } |
| |
| /** |
| * Computes a path between two ConnectPoints. |
| * |
| * @param one start of the path |
| * @param two end of the path |
| * @return Path between the two |
| * @throws PathNotFoundException if a path cannot be found |
| */ |
| private Path getPath(ConnectPoint one, ConnectPoint two) { |
| Topology topology = topologyService.currentTopology(); |
| LinkWeight weight = new LinkWeight() { |
| @Override |
| public double weight(TopologyEdge edge) { |
| return edge.link().type() == Link.Type.OPTICAL ? -1 : +1; |
| } |
| }; |
| |
| Set<Path> paths = topologyService.getPaths(topology, one.deviceId(), |
| two.deviceId(), weight); |
| if (paths.isEmpty()) { |
| throw new PathNotFoundException("No packet path from " + one + " to " + two); |
| } |
| |
| // TODO: let's be more intelligent about this eventually |
| return paths.iterator().next(); |
| } |
| } |