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/*
* Copyright 2014-2015 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.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.onosproject.net.ConnectPoint;
import org.onosproject.net.Device;
import org.onosproject.net.DeviceId;
import org.onosproject.net.Link;
import org.onosproject.net.Port;
import org.onosproject.net.device.DeviceEvent;
import org.onosproject.net.device.DeviceListener;
import org.onosproject.net.device.DeviceService;
import org.onosproject.net.link.DefaultLinkDescription;
import org.onosproject.net.link.LinkDescription;
import org.onosproject.net.link.LinkEvent;
import org.onosproject.net.link.LinkListener;
import org.onosproject.net.link.LinkProvider;
import org.onosproject.net.link.LinkProviderRegistry;
import org.onosproject.net.link.LinkProviderService;
import org.onosproject.net.link.LinkService;
import org.onosproject.net.provider.AbstractProvider;
import org.onosproject.net.provider.ProviderId;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static org.onosproject.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.onosproject.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) {
processDeviceLinks(device);
} else if (type == DeviceEvent.Type.PORT_UPDATED) {
processPortLinks(device, event.port());
}
}
}
//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 processDeviceLinks(Device device) {
for (Link link : linkService.getDeviceLinks(device.id())) {
if (link.isDurable() && link.type() == OPTICAL) {
processLink(link);
}
}
}
private void processPortLinks(Device device, Port port) {
ConnectPoint connectPoint = new ConnectPoint(device.id(), port.number());
for (Link link : linkService.getLinks(connectPoint)) {
if (link.isDurable() && link.type() == OPTICAL) {
processLink(link);
}
}
}
private void processLink(Link link) {
DeviceId srcId = link.src().deviceId();
DeviceId dstId = link.dst().deviceId();
Port srcPort = deviceService.getPort(srcId, link.src().port());
Port dstPort = deviceService.getPort(dstId, link.dst().port());
if (srcPort == null || dstPort == null) {
return; //FIXME remove this in favor of below TODO
}
boolean active = deviceService.isAvailable(srcId) &&
deviceService.isAvailable(dstId) &&
// TODO: should update be queued if src or dstPort is null?
//srcPort != null && dstPort != null &&
srcPort.isEnabled() && dstPort.isEnabled();
LinkDescription desc = new DefaultLinkDescription(link.src(), link.dst(), OPTICAL);
if (active) {
providerService.linkDetected(desc);
} else {
providerService.linkVanished(desc);
}
}
}
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