| package net.floodlightcontroller.routing; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import net.floodlightcontroller.core.internal.SwitchStorageImpl; |
| import net.floodlightcontroller.core.INetMapTopologyService.ITopoRouteService; |
| import net.floodlightcontroller.topology.NodePortTuple; |
| |
| import org.openflow.util.HexString; |
| |
| import com.thinkaurelius.titan.core.TitanFactory; |
| import com.thinkaurelius.titan.core.TitanGraph; |
| // import com.tinkerpop.blueprints.Direction; |
| import com.tinkerpop.blueprints.Vertex; |
| // import com.tinkerpop.gremlin.groovy.Gremlin; |
| // import com.tinkerpop.gremlin.java.GremlinPipeline; |
| // import com.tinkerpop.pipes.Pipe; |
| // import com.tinkerpop.pipes.PipeFunction; |
| // import com.tinkerpop.pipes.branch.LoopPipe; |
| // import com.tinkerpop.pipes.branch.LoopPipe.LoopBundle; |
| // import com.tinkerpop.pipes.filter.FilterPipe.Filter; |
| // import com.tinkerpop.pipes.util.PipesFluentPipeline; |
| |
| import com.tinkerpop.blueprints.Element; |
| |
| import javax.script.ScriptContext; |
| import javax.script.ScriptEngine; |
| import javax.script.ScriptException; |
| import com.tinkerpop.gremlin.groovy.jsr223.GremlinGroovyScriptEngine; |
| |
| public class TopoRouteService implements ITopoRouteService { |
| |
| ThreadLocal<SwitchStorageImpl> store = new ThreadLocal<SwitchStorageImpl>() { |
| @Override |
| protected SwitchStorageImpl initialValue() { |
| SwitchStorageImpl swStore = new SwitchStorageImpl(); |
| // NOTE: This is the file path from global properties |
| swStore.init("/tmp/cassandra.titan"); |
| return swStore; |
| } |
| }; |
| |
| SwitchStorageImpl swStore = store.get(); |
| |
| @Override |
| public List<NodePortTuple> GetShortestPath(NodePortTuple src, |
| NodePortTuple dest) { |
| List<NodePortTuple> result_list = new ArrayList<NodePortTuple>(); |
| |
| TitanGraph titanGraph = swStore.graph; |
| |
| String dpid_src = HexString.toHexString(src.getNodeId()); |
| String dpid_dest = HexString.toHexString(dest.getNodeId()); |
| |
| // |
| // Implement the Shortest Path between two vertices by using |
| // the following Gremlin code: |
| // results = []; v_src.as('x').out.out.in.has("type", "switch").dedup().loop('x'){it.object.dpid != v_dest.dpid & it.loops < 10}.path().fill(results) |
| // |
| |
| String gremlin = "v_src.as(\"x\").out.out.in.has(\"type\", \"switch\").dedup().loop(\"x\"){it.object.dpid != v_dest.dpid & it.loops < 10}.path().fill(results)"; |
| |
| // Get the source vertex |
| Iterator<Vertex> iter = titanGraph.getVertices("dpid", dpid_src).iterator(); |
| if (! iter.hasNext()) |
| return null; // Source vertex not found |
| Vertex v_src = iter.next(); |
| |
| // Get the destination vertex |
| iter = titanGraph.getVertices("dpid", dpid_dest).iterator(); |
| if (! iter.hasNext()) |
| return null; // Destination vertex not found |
| Vertex v_dest = iter.next(); |
| |
| // |
| // Implement the Gremlin script and run it |
| // |
| ScriptEngine engine = new GremlinGroovyScriptEngine(); |
| |
| ArrayList<ArrayList<Vertex>> results = new ArrayList<ArrayList<Vertex>>(); |
| engine.getBindings(ScriptContext.ENGINE_SCOPE).put("g", titanGraph); |
| engine.getBindings(ScriptContext.ENGINE_SCOPE).put("v_src", v_src); |
| engine.getBindings(ScriptContext.ENGINE_SCOPE).put("v_dest", v_dest); |
| engine.getBindings(ScriptContext.ENGINE_SCOPE).put("results", results); |
| |
| try { |
| engine.eval(gremlin); |
| } catch (ScriptException e) { |
| System.err.println("Caught ScriptException running Gremlin script: " + e.getMessage()); |
| return null; |
| } |
| |
| // |
| // Loop through the result and return the list |
| // of <dpid, port> tuples. |
| // |
| long nodeId = 0; |
| short portId = 0; |
| for (ArrayList<Vertex> lv : results) { |
| int idx = 0; |
| for (Vertex v: lv) { |
| String type = v.getProperty("type").toString(); |
| System.out.println("type: " + type); |
| if (type.equals("port")) { |
| String number = v.getProperty("number").toString(); |
| System.out.println("number: " + number); |
| |
| Object obj = v.getProperty("number"); |
| // String class_str = obj.getClass().toString(); |
| if (obj instanceof Short) { |
| portId = (Short)obj; |
| } else if (obj instanceof Integer) { |
| Integer int_nodeId = (Integer)obj; |
| portId = int_nodeId.shortValue(); |
| // int int_nodeId = (Integer)obj; |
| // portId = (short)int_nodeId.; |
| } |
| } else if (type.equals("switch")) { |
| String dpid = v.getProperty("dpid").toString(); |
| nodeId = HexString.toLong(dpid); |
| |
| System.out.println("dpid: " + dpid); |
| } |
| if (idx == 0) { |
| idx++; |
| continue; |
| } |
| int mod = (idx - 1) % 3; |
| if ((mod == 0) || (mod == 2)) { |
| result_list.add(new NodePortTuple(nodeId, portId)); |
| } |
| idx++; |
| } |
| } |
| if (result_list.size() > 0) |
| return result_list; |
| |
| return null; |
| } |
| |
| @Override |
| public Boolean RouteExists(NodePortTuple src, NodePortTuple dest) { |
| List<NodePortTuple> route = GetShortestPath(src, dest); |
| if (route != null) |
| return true; |
| return false; |
| } |
| } |