| /* |
| * Copyright 2015-present 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.compiler; |
| |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Sets; |
| 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.device.DeviceService; |
| import org.onosproject.net.intent.Intent; |
| import org.onosproject.net.intent.IntentException; |
| import org.onosproject.net.intent.IntentExtensionService; |
| import org.onosproject.net.intent.LinkCollectionIntent; |
| import org.onosproject.net.intent.MultiPointToSinglePointIntent; |
| |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.stream.Collectors; |
| import java.util.stream.Stream; |
| |
| import static org.onosproject.net.intent.constraint.PartialFailureConstraint.intentAllowsPartialFailure; |
| |
| |
| /** |
| * An intent compiler for |
| * {@link org.onosproject.net.intent.MultiPointToSinglePointIntent}. |
| */ |
| @Component(immediate = true) |
| public class MultiPointToSinglePointIntentCompiler |
| extends ConnectivityIntentCompiler<MultiPointToSinglePointIntent> { |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected IntentExtensionService intentManager; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected DeviceService deviceService; |
| |
| @Activate |
| public void activate() { |
| intentManager.registerCompiler(MultiPointToSinglePointIntent.class, this); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| intentManager.unregisterCompiler(MultiPointToSinglePointIntent.class); |
| } |
| |
| @Override |
| public List<Intent> compile(MultiPointToSinglePointIntent intent, List<Intent> installable) { |
| Map<DeviceId, Link> links = new HashMap<>(); |
| ConnectPoint egressPoint = intent.egressPoint(); |
| |
| final boolean allowMissingPaths = intentAllowsPartialFailure(intent); |
| boolean hasPaths = false; |
| boolean missingSomePaths = false; |
| |
| for (ConnectPoint ingressPoint : intent.ingressPoints()) { |
| if (ingressPoint.deviceId().equals(egressPoint.deviceId())) { |
| if (deviceService.isAvailable(ingressPoint.deviceId())) { |
| hasPaths = true; |
| } else { |
| missingSomePaths = true; |
| } |
| continue; |
| } |
| |
| Path path = getPath(intent, ingressPoint.deviceId(), egressPoint.deviceId()); |
| |
| if (path != null) { |
| hasPaths = true; |
| |
| for (Link link : path.links()) { |
| if (links.containsKey(link.dst().deviceId())) { |
| // We've already reached the existing tree with the first |
| // part of this path. Add the merging point with different |
| // incoming port, but don't add the remainder of the path |
| // in case it differs from the path we already have. |
| links.put(link.src().deviceId(), link); |
| break; |
| } |
| links.put(link.src().deviceId(), link); |
| } |
| } else { |
| missingSomePaths = true; |
| } |
| } |
| |
| // Allocate bandwidth on existing paths if a bandwidth constraint is set |
| List<ConnectPoint> ingressCPs = |
| intent.filteredIngressPoints().stream() |
| .map(fcp -> fcp.connectPoint()) |
| .collect(Collectors.toList()); |
| ConnectPoint egressCP = intent.filteredEgressPoint().connectPoint(); |
| |
| List<ConnectPoint> pathCPs = |
| links.values().stream() |
| .flatMap(l -> Stream.of(l.src(), l.dst())) |
| .collect(Collectors.toList()); |
| |
| pathCPs.addAll(ingressCPs); |
| pathCPs.add(egressCP); |
| |
| allocateBandwidth(intent, pathCPs); |
| |
| if (!hasPaths) { |
| throw new IntentException("Cannot find any path between ingress and egress points."); |
| } else if (!allowMissingPaths && missingSomePaths) { |
| throw new IntentException("Missing some paths between ingress and egress points."); |
| } |
| |
| Intent result = LinkCollectionIntent.builder() |
| .appId(intent.appId()) |
| .key(intent.key()) |
| .treatment(intent.treatment()) |
| .selector(intent.selector()) |
| .links(Sets.newHashSet(links.values())) |
| .filteredIngressPoints(intent.filteredIngressPoints()) |
| .filteredEgressPoints(ImmutableSet.of(intent.filteredEgressPoint())) |
| .priority(intent.priority()) |
| .constraints(intent.constraints()) |
| .resourceGroup(intent.resourceGroup()) |
| .build(); |
| |
| return Collections.singletonList(result); |
| } |
| } |