tom | 8bb1606 | 2014-09-12 14:47:46 -0700 | [diff] [blame] | 1 | package org.onlab.onos.tvue; |
| 2 | |
| 3 | import com.fasterxml.jackson.databind.ObjectMapper; |
| 4 | import com.fasterxml.jackson.databind.node.ArrayNode; |
| 5 | import com.fasterxml.jackson.databind.node.ObjectNode; |
| 6 | import org.onlab.onos.net.ConnectPoint; |
| 7 | import org.onlab.onos.net.ElementId; |
| 8 | import org.onlab.onos.net.Link; |
| 9 | import org.onlab.onos.net.device.DeviceService; |
| 10 | import org.onlab.onos.net.host.HostService; |
| 11 | import org.onlab.onos.net.link.LinkService; |
| 12 | import org.onlab.onos.net.topology.Topology; |
| 13 | import org.onlab.onos.net.topology.TopologyGraph; |
| 14 | import org.onlab.onos.net.topology.TopologyService; |
| 15 | import org.onlab.onos.net.topology.TopologyVertex; |
| 16 | import org.onlab.rest.BaseResource; |
| 17 | |
| 18 | import javax.ws.rs.GET; |
| 19 | import javax.ws.rs.Path; |
| 20 | import javax.ws.rs.Produces; |
| 21 | import javax.ws.rs.core.Response; |
| 22 | import java.util.HashMap; |
| 23 | import java.util.HashSet; |
| 24 | import java.util.Map; |
| 25 | import java.util.Set; |
| 26 | |
| 27 | /** |
| 28 | * Topology viewer resource. |
| 29 | */ |
| 30 | @Path("topology") |
| 31 | public class TopologyResource extends BaseResource { |
| 32 | |
| 33 | @Path("/graph") |
| 34 | @GET |
| 35 | @Produces("application/json") |
| 36 | public Response graph() { |
| 37 | ObjectMapper mapper = new ObjectMapper(); |
| 38 | |
| 39 | // Fetch the services we'll be using. |
| 40 | DeviceService deviceService = get(DeviceService.class); |
| 41 | HostService hostService = get(HostService.class); |
| 42 | TopologyService topologyService = get(TopologyService.class); |
| 43 | |
| 44 | // Fetch the current topology and its graph that we'll use to render. |
| 45 | Topology topo = topologyService.currentTopology(); |
| 46 | TopologyGraph graph = topologyService.getGraph(topo); |
| 47 | |
| 48 | // Build all interior vertexes, i.e. no end-station hosts yet |
| 49 | ArrayNode vertexesNode = mapper.createArrayNode(); |
| 50 | for (TopologyVertex vertex : graph.getVertexes()) { |
| 51 | vertexesNode.add(json(mapper, vertex.deviceId(), 2, |
| 52 | deviceService.isAvailable(vertex.deviceId()))); |
| 53 | } |
| 54 | |
| 55 | // Now scan all links and count number of them between the same devices |
| 56 | // using a normalized link key. |
| 57 | Map<String, AggLink> linkRecords = aggregateLinks(); |
| 58 | |
| 59 | // Now build all interior edges using the aggregated links. |
| 60 | ArrayNode edgesNode = mapper.createArrayNode(); |
| 61 | for (AggLink lr : linkRecords.values()) { |
| 62 | edgesNode.add(json(mapper, lr.links.size(), lr.link.src(), lr.link.dst())); |
| 63 | } |
| 64 | |
| 65 | // Merge the exterior and interior vertexes and inject host links as |
| 66 | // the exterior edges. |
| 67 | // Iterator<Host> hosts = hostService.getHosts(); |
| 68 | // while (hosts.hasNext()) { |
| 69 | // Host host = hosts.next(); |
| 70 | // vertexesNode.add(json(mapper, host.id().ip().toString(), 3, true)); |
| 71 | // edgesNode.add(json(mapper, 1, host.ip().toString(), |
| 72 | // host.location().elementId().uri())); |
| 73 | // } |
| 74 | |
| 75 | // Now put the vertexes and edges into a root node and ship them off |
| 76 | ObjectNode rootNode = mapper.createObjectNode(); |
| 77 | rootNode.put("vertexes", vertexesNode); |
| 78 | rootNode.put("edges", edgesNode); |
| 79 | return Response.ok(rootNode.toString()).build(); |
| 80 | } |
| 81 | |
| 82 | // Scan all links and counts number of them between the same devices |
| 83 | // using a normalized link key. |
| 84 | private Map<String, AggLink> aggregateLinks() { |
| 85 | Map<String, AggLink> aggLinks = new HashMap<>(); |
| 86 | LinkService linkService = get(LinkService.class); |
| 87 | for (Link link : linkService.getLinks()) { |
| 88 | String key = key(link); |
| 89 | AggLink lr = aggLinks.get(key); |
| 90 | if (lr == null) { |
| 91 | lr = new AggLink(key); |
| 92 | aggLinks.put(key, lr); |
| 93 | } |
| 94 | lr.addLink(link); |
| 95 | } |
| 96 | return aggLinks; |
| 97 | } |
| 98 | |
| 99 | // Produces JSON for a graph vertex. |
| 100 | private ObjectNode json(ObjectMapper mapper, ElementId id, int group, |
| 101 | boolean isOnline) { |
| 102 | return mapper.createObjectNode() |
| 103 | .put("name", id.uri().toString()) |
| 104 | .put("group", group) |
| 105 | .put("online", isOnline); |
| 106 | } |
| 107 | |
| 108 | // Produces JSON for a graph edge. |
| 109 | private ObjectNode json(ObjectMapper mapper, int count, |
| 110 | ConnectPoint src, ConnectPoint dst) { |
| 111 | return json(mapper, count, id(src), id(dst)); |
| 112 | } |
| 113 | |
| 114 | // Produces JSON for a graph edge. |
| 115 | private ObjectNode json(ObjectMapper mapper, int count, String src, String dst) { |
| 116 | return mapper.createObjectNode() |
| 117 | .put("source", src).put("target", dst).put("value", count); |
| 118 | } |
| 119 | |
| 120 | // Aggregate link of all links between the same devices regardless of |
| 121 | // their direction. |
| 122 | private class AggLink { |
| 123 | Link link; // representative links |
| 124 | |
| 125 | final String key; |
| 126 | final Set<Link> links = new HashSet<>(); |
| 127 | |
| 128 | AggLink(String key) { |
| 129 | this.key = key; |
| 130 | } |
| 131 | |
| 132 | void addLink(Link link) { |
| 133 | links.add(link); |
| 134 | if (this.link == null) { |
| 135 | this.link = link; |
| 136 | } |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | // Returns a canonical key for the specified link. |
| 141 | static String key(Link link) { |
| 142 | String s = id(link.src()); |
| 143 | String d = id(link.dst()); |
| 144 | return s.compareTo(d) > 0 ? d + s : s + d; |
| 145 | } |
| 146 | |
| 147 | // Returns a formatted string for the element associated with the given |
| 148 | // connection point. |
| 149 | private static String id(ConnectPoint cp) { |
| 150 | return cp.elementId().uri().toString(); |
| 151 | } |
| 152 | |
| 153 | } |