/**
* Copyright 2013, Big Switch Networks, Inc.
*
* 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 net.floodlightcontroller.linkdiscovery.web;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import net.floodlightcontroller.linkdiscovery.ILinkDiscovery.LinkDirection;
import net.floodlightcontroller.linkdiscovery.ILinkDiscovery.LinkType;
import net.floodlightcontroller.linkdiscovery.ILinkDiscoveryService;
import net.floodlightcontroller.linkdiscovery.LinkInfo;
import net.floodlightcontroller.routing.Link;
import org.restlet.resource.Get;
import org.restlet.resource.ServerResource;
public class ExternalLinksResource extends ServerResource {
@Get("json")
public Set<LinkWithType> retrieve() {
ILinkDiscoveryService ld = (ILinkDiscoveryService)getContext().getAttributes().
get(ILinkDiscoveryService.class.getCanonicalName());
Map<Link, LinkInfo> links = new HashMap<Link, LinkInfo>();
Set<LinkWithType> returnLinkSet = new HashSet<LinkWithType>();
if (ld != null) {
links.putAll(ld.getLinks());
for (Link link: links.keySet()) {
LinkInfo info = links.get(link);
LinkType type = ld.getLinkType(link, info);
if (type == LinkType.MULTIHOP_LINK) {
LinkWithType lwt;
long src = link.getSrc();
long dst = link.getDst();
short srcPort = link.getSrcPort();
short dstPort = link.getDstPort();
Link otherLink = new Link(dst, dstPort, src, srcPort);
LinkInfo otherInfo = links.get(otherLink);
LinkType otherType = null;
if (otherInfo != null)
otherType = ld.getLinkType(otherLink, otherInfo);
if (otherType == LinkType.MULTIHOP_LINK) {
// This is a bi-direcitonal link.
// It is sufficient to add only one side of it.
if ((src < dst) || (src == dst && srcPort < dstPort)) {
lwt = new LinkWithType(link,
type,
LinkDirection.BIDIRECTIONAL);
returnLinkSet.add(lwt);
}
} else {
// This is a unidirectional link.
lwt = new LinkWithType(link,
type,
LinkDirection.UNIDIRECTIONAL);
returnLinkSet.add(lwt);
}
}
}
}
return returnLinkSet;
}
}