ONOS-1438: Improved the routing rule population process for link add and failure…

…; computes the routes changed from the link changes and populates the rules only for the routes.

Change-Id: Id4dbd80da37b333f2c19bc97333472dc8031481b

@@ -139,6 +139,7 @@ public class IpHandler {
                     OutboundPacket packet = new DefaultOutboundPacket(deviceId,
                             treatment, ByteBuffer.wrap(eth.serialize()));
                     srManager.packetService.emit(packet);
+                    ipPacketQueue.get(destIpAddress).remove(ipPacket);
                 }
             }
         }

@@ -40,6 +40,7 @@ import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
 import java.util.Set;
+import java.util.concurrent.atomic.AtomicLong;
 
 import static com.google.common.base.Preconditions.checkNotNull;
 
@@ -47,8 +48,9 @@ public class RoutingRulePopulator {
 
     private static final Logger log = LoggerFactory.getLogger(RoutingRulePopulator.class);
 
-    private SegmentRoutingManager srManager;
-    private NetworkConfigHandler config;
+    private final SegmentRoutingManager srManager;
+    private final NetworkConfigHandler config;
+    private AtomicLong rulePopulationCounter;
 
     /**
      * Creates a RoutingRulePopulator object.
@@ -58,6 +60,21 @@ public class RoutingRulePopulator {
     public RoutingRulePopulator(SegmentRoutingManager srManager) {
         this.srManager = srManager;
         this.config = checkNotNull(srManager.networkConfigHandler);
+        this.rulePopulationCounter = new AtomicLong(0);
+    }
+
+    /**
+     * Resets the population counter.
+     */
+    public void resetCounter() {
+        rulePopulationCounter.set(0);
+    }
+
+    /**
+     * Returns the number of rules populated.
+     */
+    public long getCounter() {
+        return rulePopulationCounter.get();
     }
 
     /**
@@ -87,6 +104,7 @@ public class RoutingRulePopulator {
                 srManager.appId, 600, false, FlowRule.Type.IP);
 
         srManager.flowRuleService.applyFlowRules(f);
+        rulePopulationCounter.incrementAndGet();
         log.debug("Flow rule {} is set to switch {}", f, deviceId);
     }
 
@@ -162,6 +180,7 @@ public class RoutingRulePopulator {
                 srManager.appId, 600, false, FlowRule.Type.IP);
 
         srManager.flowRuleService.applyFlowRules(f);
+        rulePopulationCounter.incrementAndGet();
         log.debug("IP flow rule {} is set to switch {}", f, deviceId);
 
         return true;
@@ -216,6 +235,7 @@ public class RoutingRulePopulator {
             FlowRule f = new DefaultFlowRule(deviceId, selector, treatment, 100,
                     srManager.appId, 600, false, FlowRule.Type.MPLS);
             srManager.flowRuleService.applyFlowRules(f);
+            rulePopulationCounter.incrementAndGet();
             log.debug("MPLS rule {} is set to {}", f, deviceId);
         }
 

@@ -151,8 +151,7 @@ public class SegmentRoutingManager {
                 groupHandler.createGroups();
                 groupHandlerMap.put(device.id(), groupHandler);
                 log.debug("Initiating default group handling for {}", device.id());
-
-                defaultRoutingHandler.startPopulationProcess();
+                defaultRoutingHandler.populateTtpRules(device.id());
             } else {
                 log.debug("Activate: Local role {} "
                                 + "is not MASTER for device {}",
@@ -162,6 +161,8 @@ public class SegmentRoutingManager {
             }
         }
 
+        defaultRoutingHandler.startPopulationProcess();
+
         log.info("Started");
     }
 
@@ -239,6 +240,8 @@ public class SegmentRoutingManager {
             switch (event.type()) {
             case DEVICE_ADDED:
             case PORT_REMOVED:
+            case DEVICE_UPDATED:
+            case DEVICE_AVAILABILITY_CHANGED:
                 scheduleEventHandlerIfNotScheduled(event);
                 break;
             default:
@@ -294,8 +297,12 @@ public class SegmentRoutingManager {
                     processLinkRemoved((Link) event.subject());
                 } else if (event.type() == GroupEvent.Type.GROUP_ADDED) {
                     processGroupAdded((Group) event.subject());
-                } else if (event.type() == DeviceEvent.Type.DEVICE_ADDED) {
-                    processDeviceAdded((Device) event.subject());
+                } else if (event.type() == DeviceEvent.Type.DEVICE_ADDED ||
+                        event.type() == DeviceEvent.Type.DEVICE_AVAILABILITY_CHANGED ||
+                        event.type() == DeviceEvent.Type.DEVICE_UPDATED) {
+                    if (deviceService.isAvailable(((Device) event.subject()).id())) {
+                        processDeviceAdded((Device) event.subject());
+                    }
                 } else if (event.type() == DeviceEvent.Type.PORT_REMOVED) {
                     processPortRemoved((Device) event.subject(),
                             ((DeviceEvent) event).port());
@@ -321,12 +328,12 @@ public class SegmentRoutingManager {
                 groupHandler.linkUp(link);
             }
         }
-        defaultRoutingHandler.startPopulationProcess();
+        defaultRoutingHandler.populateRoutingRulesForLinkStatusChange(null);
     }
 
     private void processLinkRemoved(Link link) {
         log.debug("A link {} was removed", link.toString());
-        defaultRoutingHandler.startPopulationProcess();
+        defaultRoutingHandler.populateRoutingRulesForLinkStatusChange(link);
     }