| /* |
| * 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.tvue; |
| |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| import com.fasterxml.jackson.databind.node.ArrayNode; |
| import com.fasterxml.jackson.databind.node.ObjectNode; |
| import org.onlab.onos.net.ConnectPoint; |
| import org.onlab.onos.net.ElementId; |
| import org.onlab.onos.net.Host; |
| import org.onlab.onos.net.Link; |
| import org.onlab.onos.net.Path; |
| import org.onlab.onos.net.device.DeviceService; |
| import org.onlab.onos.net.host.HostService; |
| import org.onlab.onos.net.link.LinkService; |
| import org.onlab.onos.net.topology.PathService; |
| import org.onlab.onos.net.topology.Topology; |
| import org.onlab.onos.net.topology.TopologyGraph; |
| import org.onlab.onos.net.topology.TopologyService; |
| import org.onlab.onos.net.topology.TopologyVertex; |
| import org.onlab.packet.IpAddress; |
| import org.onlab.rest.BaseResource; |
| |
| import javax.ws.rs.GET; |
| import javax.ws.rs.PathParam; |
| import javax.ws.rs.Produces; |
| import javax.ws.rs.core.Response; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import static org.onlab.onos.net.DeviceId.deviceId; |
| import static org.onlab.onos.net.HostId.hostId; |
| import static org.onlab.onos.net.PortNumber.portNumber; |
| |
| /** |
| * Topology viewer resource. |
| */ |
| @javax.ws.rs.Path("topology") |
| public class TopologyResource extends BaseResource { |
| |
| @javax.ws.rs.Path("/graph") |
| @GET |
| @Produces("application/json") |
| public Response graph() { |
| ObjectMapper mapper = new ObjectMapper(); |
| |
| // Fetch the services we'll be using. |
| DeviceService deviceService = get(DeviceService.class); |
| HostService hostService = get(HostService.class); |
| TopologyService topologyService = get(TopologyService.class); |
| |
| // Fetch the current topology and its graph that we'll use to render. |
| Topology topo = topologyService.currentTopology(); |
| TopologyGraph graph = topologyService.getGraph(topo); |
| |
| // Build all interior vertexes, i.e. no end-station hosts yet |
| ArrayNode vertexesNode = mapper.createArrayNode(); |
| for (TopologyVertex vertex : graph.getVertexes()) { |
| vertexesNode.add(json(mapper, vertex.deviceId(), 2, |
| vertex.deviceId().uri().getSchemeSpecificPart(), |
| deviceService.isAvailable(vertex.deviceId()))); |
| } |
| |
| // Now scan all links and count number of them between the same devices |
| // using a normalized link key. |
| Map<String, AggLink> linkRecords = aggregateLinks(); |
| |
| // Now build all interior edges using the aggregated links. |
| ArrayNode edgesNode = mapper.createArrayNode(); |
| for (AggLink lr : linkRecords.values()) { |
| edgesNode.add(json(mapper, lr.links.size(), lr.link.src(), lr.link.dst())); |
| } |
| |
| // Merge the exterior and interior vertexes and inject host links as |
| // the exterior edges. |
| for (Host host : hostService.getHosts()) { |
| Set<IpAddress> ipAddresses = host.ipAddresses(); |
| IpAddress ipAddress = ipAddresses.isEmpty() ? null : ipAddresses.iterator().next(); |
| String label = ipAddress != null ? ipAddress.toString() : host.mac().toString(); |
| vertexesNode.add(json(mapper, host.id(), 3, label, true)); |
| edgesNode.add(json(mapper, 1, host.location(), new ConnectPoint(host.id(), portNumber(-1)))); |
| } |
| |
| // Now put the vertexes and edges into a root node and ship them off |
| ObjectNode rootNode = mapper.createObjectNode(); |
| rootNode.set("vertexes", vertexesNode); |
| rootNode.set("edges", edgesNode); |
| return Response.ok(rootNode.toString()).build(); |
| } |
| |
| |
| /** |
| * Returns a JSON array of all paths between the specified hosts. |
| * |
| * @param src source host id |
| * @param dst target host id |
| * @return JSON array of paths |
| */ |
| @javax.ws.rs.Path("/paths/{src}/{dst}") |
| @GET |
| @Produces("application/json") |
| public Response paths(@PathParam("src") String src, @PathParam("dst") String dst) { |
| ObjectMapper mapper = new ObjectMapper(); |
| PathService pathService = get(PathService.class); |
| Set<Path> paths = pathService.getPaths(elementId(src), elementId(dst)); |
| |
| ArrayNode pathsNode = mapper.createArrayNode(); |
| for (Path path : paths) { |
| pathsNode.add(json(mapper, path)); |
| } |
| |
| // Now put the vertexes and edges into a root node and ship them off |
| ObjectNode rootNode = mapper.createObjectNode(); |
| rootNode.set("paths", pathsNode); |
| return Response.ok(rootNode.toString()).build(); |
| } |
| |
| // Creates either device ID or host ID as appropriate. |
| private ElementId elementId(String id) { |
| return id.startsWith("nic:") ? hostId(id) : deviceId(id); |
| } |
| |
| // Scan all links and counts number of them between the same devices |
| // using a normalized link key. |
| private Map<String, AggLink> aggregateLinks() { |
| Map<String, AggLink> aggLinks = new HashMap<>(); |
| LinkService linkService = get(LinkService.class); |
| for (Link link : linkService.getLinks()) { |
| String key = key(link); |
| AggLink lr = aggLinks.get(key); |
| if (lr == null) { |
| lr = new AggLink(key); |
| aggLinks.put(key, lr); |
| } |
| lr.addLink(link); |
| } |
| return aggLinks; |
| } |
| |
| // Produces JSON for a graph vertex. |
| private ObjectNode json(ObjectMapper mapper, ElementId id, int group, |
| String label, boolean isOnline) { |
| return mapper.createObjectNode() |
| .put("name", id.toString()) |
| .put("label", label) |
| .put("group", group) |
| .put("online", isOnline); |
| } |
| |
| // Produces JSON for a graph edge. |
| private ObjectNode json(ObjectMapper mapper, int count, |
| ConnectPoint src, ConnectPoint dst) { |
| return json(mapper, count, id(src), id(dst)); |
| } |
| |
| // Produces JSON for a graph edge. |
| private ObjectNode json(ObjectMapper mapper, int count, String src, String dst) { |
| return mapper.createObjectNode() |
| .put("source", src).put("target", dst).put("value", count); |
| } |
| |
| // Produces JSON representation of a network path. |
| private ArrayNode json(ObjectMapper mapper, Path path) { |
| ArrayNode pathNode = mapper.createArrayNode(); |
| for (Link link : path.links()) { |
| ObjectNode linkNode = mapper.createObjectNode() |
| .put("src", id(link.src())) |
| .put("dst", id(link.dst())); |
| pathNode.add(linkNode); |
| } |
| return pathNode; |
| } |
| |
| |
| // Aggregate link of all links between the same devices regardless of |
| // their direction. |
| private class AggLink { |
| Link link; // representative links |
| |
| final String key; |
| final Set<Link> links = new HashSet<>(); |
| |
| AggLink(String key) { |
| this.key = key; |
| } |
| |
| void addLink(Link link) { |
| links.add(link); |
| if (this.link == null) { |
| this.link = link; |
| } |
| } |
| } |
| |
| // Returns a canonical key for the specified link. |
| static String key(Link link) { |
| String s = id(link.src()); |
| String d = id(link.dst()); |
| return s.compareTo(d) > 0 ? d + s : s + d; |
| } |
| |
| // Returns a formatted string for the element associated with the given |
| // connection point. |
| private static String id(ConnectPoint cp) { |
| return cp.elementId().toString(); |
| } |
| |
| } |