| package net.onrc.onos.intent.runtime; |
| |
| import java.util.HashMap; |
| |
| import net.floodlightcontroller.core.module.IFloodlightService; |
| import net.onrc.onos.intent.ConstrainedBFSTree; |
| import net.onrc.onos.intent.ConstrainedShortestPathIntent; |
| import net.onrc.onos.intent.ErrorIntent; |
| import net.onrc.onos.intent.ErrorIntent.ErrorType; |
| import net.onrc.onos.intent.Intent; |
| import net.onrc.onos.intent.Intent.IntentState; |
| import net.onrc.onos.intent.IntentOperation; |
| import net.onrc.onos.intent.IntentOperation.Operator; |
| import net.onrc.onos.intent.IntentOperationList; |
| import net.onrc.onos.intent.PathIntent; |
| import net.onrc.onos.intent.PathIntentMap; |
| import net.onrc.onos.intent.ShortestPathIntent; |
| import net.onrc.onos.ofcontroller.networkgraph.NetworkGraph; |
| import net.onrc.onos.ofcontroller.networkgraph.Path; |
| import net.onrc.onos.ofcontroller.networkgraph.Switch; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * @author Toshio Koide (t-koide@onlab.us) |
| */ |
| public class PathCalcRuntime implements IFloodlightService { |
| private NetworkGraph graph; |
| private final static Logger log = LoggerFactory.getLogger(PathCalcRuntime.class); |
| public PathCalcRuntime(NetworkGraph g) { |
| this.graph = g; |
| } |
| |
| /** |
| * calculate shortest-path and constrained-shortest-path intents into low-level path intents |
| * @param intentOpList IntentOperationList having instances of ShortestPathIntent/ConstrainedShortestPathIntent |
| * @param pathIntents a set of current low-level intents |
| * @return IntentOperationList. PathIntent and/or ErrorIntent instances. |
| */ |
| public IntentOperationList calcPathIntents(final IntentOperationList intentOpList, final PathIntentMap pathIntents) { |
| IntentOperationList pathIntentOpList = new IntentOperationList(); |
| HashMap<Switch, ConstrainedBFSTree> spfTrees = new HashMap<>(); |
| |
| for (IntentOperation intentOp: intentOpList) { |
| switch (intentOp.operator) { |
| case ADD: |
| if (!(intentOp.intent instanceof ShortestPathIntent)) { |
| log.error("Unsupported intent type: {}", intentOp.intent.getClass().getName()); |
| pathIntentOpList.add(Operator.ERROR, new ErrorIntent( |
| ErrorType.UNSUPPORTED_INTENT, |
| "Unsupported intent type.", |
| intentOp.intent)); |
| continue; |
| } |
| |
| ShortestPathIntent spIntent = (ShortestPathIntent) intentOp.intent; |
| Switch srcSwitch = graph.getSwitch(spIntent.getSrcSwitchDpid()); |
| Switch dstSwitch = graph.getSwitch(spIntent.getDstSwitchDpid()); |
| if (srcSwitch == null || dstSwitch == null) { |
| log.error("Switch not found: {}, {}", |
| spIntent.getSrcSwitchDpid(), |
| spIntent.getDstSwitchDpid()); |
| pathIntentOpList.add(Operator.ERROR, new ErrorIntent( |
| ErrorType.SWITCH_NOT_FOUND, |
| "Switch not found.", |
| spIntent)); |
| continue; |
| } |
| |
| double bandwidth = 0.0; |
| ConstrainedBFSTree tree = null; |
| if (spIntent instanceof ConstrainedShortestPathIntent) { |
| bandwidth = ((ConstrainedShortestPathIntent) intentOp.intent).getBandwidth(); |
| tree = new ConstrainedBFSTree(srcSwitch, pathIntents, bandwidth); |
| } |
| else { |
| tree = spfTrees.get(srcSwitch); |
| if (tree == null) { |
| tree = new ConstrainedBFSTree(srcSwitch); |
| spfTrees.put(srcSwitch, tree); |
| } |
| } |
| Path path = tree.getPath(dstSwitch); |
| if (path == null) { |
| log.error("Path not found: {}", spIntent.toString()); |
| pathIntentOpList.add(Operator.ERROR, new ErrorIntent( |
| ErrorType.PATH_NOT_FOUND, |
| "Path not found.", |
| spIntent)); |
| continue; |
| } |
| |
| // generate new path-intent ID |
| String oldPathIntentId = spIntent.getPathIntentId(); |
| String newPathIntentId; |
| if (oldPathIntentId == null) |
| newPathIntentId = PathIntent.createFirstId(spIntent.getId()); |
| else { |
| newPathIntentId = PathIntent.createNextId(oldPathIntentId); |
| |
| // Request removal of low-level intent if it exists. |
| pathIntentOpList.add(Operator.REMOVE, new Intent(oldPathIntentId)); |
| } |
| |
| // create new path-intent |
| PathIntent pathIntent = new PathIntent(newPathIntentId, path, bandwidth, spIntent); |
| pathIntent.setState(IntentState.INST_REQ); |
| spIntent.setPathIntent(pathIntent); |
| pathIntentOpList.add(Operator.ADD, pathIntent); |
| |
| break; |
| case REMOVE: |
| pathIntentOpList.add(Operator.REMOVE, new Intent( |
| ((ShortestPathIntent) intentOp.intent).getPathIntentId())); |
| break; |
| case ERROR: |
| // just ignore |
| break; |
| } |
| } |
| return pathIntentOpList; |
| } |
| } |