| /* |
| * 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.onosproject.net.intent.impl; |
| |
| import com.google.common.collect.ImmutableList; |
| 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.onosproject.net.ConnectPoint; |
| import org.onosproject.net.Link; |
| import org.onosproject.net.Path; |
| import org.onosproject.net.intent.Intent; |
| import org.onosproject.net.intent.IntentCompiler; |
| import org.onosproject.net.intent.IntentExtensionService; |
| import org.onosproject.net.intent.OpticalConnectivityIntent; |
| import org.onosproject.net.intent.OpticalPathIntent; |
| import org.onosproject.net.resource.LinkResourceAllocations; |
| import org.onosproject.net.topology.LinkWeight; |
| import org.onosproject.net.topology.Topology; |
| import org.onosproject.net.topology.TopologyEdge; |
| import org.onosproject.net.topology.TopologyService; |
| |
| import java.util.List; |
| import java.util.Set; |
| |
| /** |
| * An intent compiler for {@link org.onosproject.net.intent.OpticalConnectivityIntent}. |
| */ |
| @Component(immediate = true) |
| public class OpticalConnectivityIntentCompiler implements IntentCompiler<OpticalConnectivityIntent> { |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected IntentExtensionService intentManager; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected TopologyService topologyService; |
| |
| @Activate |
| public void activate() { |
| intentManager.registerCompiler(OpticalConnectivityIntent.class, this); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| intentManager.unregisterCompiler(OpticalConnectivityIntent.class); |
| } |
| |
| @Override |
| public List<Intent> compile(OpticalConnectivityIntent intent, |
| List<Intent> installable, |
| Set<LinkResourceAllocations> resources) { |
| // TODO: compute multiple paths using the K-shortest path algorithm |
| Path path = calculateOpticalPath(intent.getSrc(), intent.getDst()); |
| Intent newIntent = new OpticalPathIntent(intent.appId(), |
| intent.getSrc(), |
| intent.getDst(), |
| path); |
| return ImmutableList.of(newIntent); |
| } |
| |
| private Path calculateOpticalPath(ConnectPoint start, ConnectPoint end) { |
| // TODO: support user policies |
| Topology topology = topologyService.currentTopology(); |
| LinkWeight weight = new LinkWeight() { |
| @Override |
| public double weight(TopologyEdge edge) { |
| if (edge.link().state() == Link.State.INACTIVE) { |
| return -1; |
| } |
| return edge.link().type() == Link.Type.OPTICAL ? +1 : -1; |
| } |
| }; |
| |
| Set<Path> paths = topologyService.getPaths(topology, start.deviceId(), |
| end.deviceId(), weight); |
| if (paths.isEmpty()) { |
| throw new PathNotFoundException("No Optical path found from " + |
| start + " to " + end); |
| } |
| |
| // TODO: let's be more intelligent about this eventually |
| return paths.iterator().next(); |
| } |
| |
| } |