| package org.onlab.onos.net.intent.impl; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| 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.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.intent.PointToPointIntentWithBandwidthConstraint; |
| import org.onlab.onos.net.provider.ProviderId; |
| import org.onlab.onos.net.resource.BandwidthResourceRequest; |
| import org.onlab.onos.net.resource.DefaultLinkResourceRequest; |
| import org.onlab.onos.net.resource.LinkResourceRequest; |
| import org.onlab.onos.net.resource.LinkResourceService; |
| import org.onlab.onos.net.resource.ResourceRequest; |
| import org.onlab.onos.net.resource.ResourceType; |
| 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; |
| |
| /** |
| * A intent compiler for {@link org.onlab.onos.net.intent.HostToHostIntent}. |
| */ |
| @Component(immediate = true) |
| public class PointToPointIntentWithBandwidthConstraintCompiler |
| implements IntentCompiler<PointToPointIntentWithBandwidthConstraint> { |
| |
| 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; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected LinkResourceService resourceService; |
| |
| @Activate |
| public void activate() { |
| intentManager.registerCompiler(PointToPointIntentWithBandwidthConstraint.class, this); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| intentManager.unregisterCompiler(PointToPointIntent.class); |
| } |
| |
| @Override |
| public List<Intent> compile(PointToPointIntentWithBandwidthConstraint intent) { |
| Path path = getPath(intent.ingressPoint(), intent.egressPoint(), intent.bandwidthRequest()); |
| |
| List<Link> links = new ArrayList<>(); |
| links.add(DefaultEdgeLink.createEdgeLink(intent.ingressPoint(), true)); |
| links.addAll(path.links()); |
| links.add(DefaultEdgeLink.createEdgeLink(intent.egressPoint(), false)); |
| |
| return Arrays.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, |
| PointToPointIntentWithBandwidthConstraint intent) { |
| LinkResourceRequest.Builder request = DefaultLinkResourceRequest.builder(intent.id(), |
| path.links()) |
| // TODO - this seems awkward, maybe allow directly attaching a BandwidthRequest |
| .addBandwidthRequest(intent.bandwidthRequest().bandwidth().toDouble()); |
| LinkResourceRequest bandwidthRequest = request.build(); |
| LinkResourceRequest[] bandwidthRequests = {bandwidthRequest}; |
| return new PathIntent(intent.appId(), |
| intent.selector(), intent.treatment(), path, |
| bandwidthRequests); |
| } |
| |
| /** |
| * 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.onlab.onos.net.intent.impl.PathNotFoundException if a path cannot be found |
| */ |
| private Path getPath(ConnectPoint one, ConnectPoint two, final BandwidthResourceRequest bandwidthRequest) { |
| Topology topology = topologyService.currentTopology(); |
| LinkWeight weight = new LinkWeight() { |
| @Override |
| public double weight(TopologyEdge edge) { |
| if (bandwidthRequest != null) { |
| double allocatedBandwidth = 0.0; |
| Iterable<ResourceRequest> availableResources = resourceService.getAvailableResources(edge.link()); |
| for (ResourceRequest availableResource : availableResources) { |
| if (availableResource.type() == ResourceType.BANDWIDTH) { |
| BandwidthResourceRequest bandwidthRequest = (BandwidthResourceRequest) availableResource; |
| allocatedBandwidth += bandwidthRequest.bandwidth().toDouble(); |
| } |
| } |
| |
| // TODO this needs to be discovered from switch/ports somehow |
| double maxBandwidth = 1000; |
| |
| double availableBandwidth = maxBandwidth - allocatedBandwidth; |
| if (availableBandwidth >= bandwidthRequest.bandwidth().toDouble()) { |
| return 1; |
| } else { |
| return -1; |
| } |
| } else { |
| return 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(); |
| } |
| } |