| /* |
| * 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.optical; |
| |
| 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.Device; |
| import org.onlab.onos.net.Link; |
| import org.onlab.onos.net.device.DeviceEvent; |
| import org.onlab.onos.net.device.DeviceListener; |
| import org.onlab.onos.net.device.DeviceService; |
| import org.onlab.onos.net.link.DefaultLinkDescription; |
| import org.onlab.onos.net.link.LinkDescription; |
| import org.onlab.onos.net.link.LinkEvent; |
| import org.onlab.onos.net.link.LinkListener; |
| import org.onlab.onos.net.link.LinkProvider; |
| import org.onlab.onos.net.link.LinkProviderRegistry; |
| import org.onlab.onos.net.link.LinkProviderService; |
| import org.onlab.onos.net.link.LinkService; |
| import org.onlab.onos.net.provider.AbstractProvider; |
| import org.onlab.onos.net.provider.ProviderId; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import static org.onlab.onos.net.Link.Type.OPTICAL; |
| |
| /** |
| * Ancillary provider to activate/deactivate optical links as their respective |
| * devices go online or offline. |
| */ |
| @Component(immediate = true) |
| public class OpticalLinkProvider extends AbstractProvider implements LinkProvider { |
| |
| private static final Logger log = LoggerFactory.getLogger(OpticalLinkProvider.class); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected LinkProviderRegistry registry; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected DeviceService deviceService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected LinkService linkService; |
| |
| private LinkProviderService providerService; |
| private DeviceListener deviceListener = new InternalDeviceListener(); |
| private LinkListener linkListener = new InternalLinkListener(); |
| |
| public OpticalLinkProvider() { |
| super(new ProviderId("optical", "org.onlab.onos.optical")); |
| } |
| |
| @Activate |
| protected void activate() { |
| deviceService.addListener(deviceListener); |
| linkService.addListener(linkListener); |
| providerService = registry.register(this); |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| deviceService.removeListener(deviceListener); |
| linkService.removeListener(linkListener); |
| registry.unregister(this); |
| log.info("Stopped"); |
| } |
| |
| //Listens to device events and processes their links. |
| private class InternalDeviceListener implements DeviceListener { |
| @Override |
| public void event(DeviceEvent event) { |
| DeviceEvent.Type type = event.type(); |
| Device device = event.subject(); |
| if (type == DeviceEvent.Type.DEVICE_AVAILABILITY_CHANGED || |
| type == DeviceEvent.Type.DEVICE_ADDED || |
| type == DeviceEvent.Type.DEVICE_UPDATED) { |
| processLinks(device); |
| } |
| } |
| } |
| |
| //Listens to link events and processes the link additions. |
| private class InternalLinkListener implements LinkListener { |
| @Override |
| public void event(LinkEvent event) { |
| if (event.type() == LinkEvent.Type.LINK_ADDED) { |
| Link link = event.subject(); |
| if (link.providerId().scheme().equals("cfg")) { |
| processLink(event.subject()); |
| } |
| } |
| } |
| } |
| |
| private void processLinks(Device device) { |
| for (Link link : linkService.getDeviceLinks(device.id())) { |
| if (link.isDurable() && link.type() == OPTICAL) { |
| processLink(link); |
| } |
| } |
| } |
| |
| private void processLink(Link link) { |
| boolean active = deviceService.isAvailable(link.src().deviceId()) && |
| deviceService.isAvailable(link.dst().deviceId()); |
| LinkDescription desc = new DefaultLinkDescription(link.src(), link.dst(), OPTICAL); |
| if (active) { |
| providerService.linkDetected(desc); |
| } else { |
| providerService.linkVanished(desc); |
| } |
| } |
| } |