| /* |
| * 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 java.util.Arrays; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| 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.DeviceId; |
| 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.LinkCollectionIntent; |
| import org.onosproject.net.intent.MultiPointToSinglePointIntent; |
| import org.onosproject.net.intent.PointToPointIntent; |
| import org.onosproject.net.resource.LinkResourceAllocations; |
| import org.onosproject.net.topology.PathService; |
| |
| import com.google.common.collect.Sets; |
| |
| /** |
| * An intent compiler for |
| * {@link org.onosproject.net.intent.MultiPointToSinglePointIntent}. |
| */ |
| @Component(immediate = true) |
| public class MultiPointToSinglePointIntentCompiler |
| implements IntentCompiler<MultiPointToSinglePointIntent> { |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected IntentExtensionService intentManager; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected PathService pathService; |
| |
| @Activate |
| public void activate() { |
| intentManager.registerCompiler(MultiPointToSinglePointIntent.class, this); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| intentManager.unregisterCompiler(PointToPointIntent.class); |
| } |
| |
| @Override |
| public List<Intent> compile(MultiPointToSinglePointIntent intent, List<Intent> installable, |
| Set<LinkResourceAllocations> resources) { |
| Map<DeviceId, Link> links = new HashMap<>(); |
| |
| for (ConnectPoint ingressPoint : intent.ingressPoints()) { |
| Path path = getPath(ingressPoint, intent.egressPoint()); |
| for (Link link : path.links()) { |
| if (links.containsKey(link.src().deviceId())) { |
| // We've already reached the existing tree with the first |
| // part of this path. Don't add the remainder of the path |
| // in case it differs from the path we already have. |
| break; |
| } |
| |
| links.put(link.src().deviceId(), link); |
| } |
| } |
| |
| Intent result = new LinkCollectionIntent(intent.appId(), |
| intent.selector(), intent.treatment(), |
| Sets.newHashSet(links.values()), intent.egressPoint()); |
| return Arrays.asList(result); |
| } |
| |
| /** |
| * Computes a path between two ConnectPoints. |
| * |
| * @param one start of the path |
| * @param two end of the path |
| * @return Path between the two |
| * @throws org.onosproject.net.intent.impl.PathNotFoundException if a path cannot be found |
| */ |
| private Path getPath(ConnectPoint one, ConnectPoint two) { |
| Set<Path> paths = pathService.getPaths(one.deviceId(), two.deviceId()); |
| if (paths.isEmpty()) { |
| throw new PathNotFoundException("No path from " + one + " to " + two); |
| } |
| // TODO: let's be more intelligent about this eventually |
| return paths.iterator().next(); |
| } |
| } |