Move routing from incubator to a separate app
Change-Id: I961d10af99c572b1f8d9b3d37c6f52dd04422007
diff --git a/apps/route-service/app/src/main/java/org/onosproject/routeservice/impl/RouteMonitor.java b/apps/route-service/app/src/main/java/org/onosproject/routeservice/impl/RouteMonitor.java
new file mode 100644
index 0000000..24d2aff
--- /dev/null
+++ b/apps/route-service/app/src/main/java/org/onosproject/routeservice/impl/RouteMonitor.java
@@ -0,0 +1,148 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * 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.onosproject.routeservice.impl;
+
+import org.onosproject.cluster.ClusterEvent;
+import org.onosproject.cluster.ClusterEventListener;
+import org.onosproject.cluster.ClusterService;
+import org.onosproject.cluster.NodeId;
+import org.onosproject.routeservice.ResolvedRoute;
+import org.onosproject.routeservice.Route;
+import org.onosproject.routeservice.RouteAdminService;
+import org.onosproject.store.serializers.KryoNamespaces;
+import org.onosproject.store.service.DistributedPrimitive;
+import org.onosproject.store.service.Serializer;
+import org.onosproject.store.service.StorageService;
+import org.onosproject.store.service.WorkQueue;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Collection;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.stream.Collectors;
+
+import static java.util.concurrent.Executors.newSingleThreadScheduledExecutor;
+import static org.onlab.util.Tools.groupedThreads;
+
+/**
+ * Monitors cluster nodes and removes routes if a cluster node becomes unavailable.
+ */
+public class RouteMonitor {
+
+ private final Logger log = LoggerFactory.getLogger(this.getClass());
+
+ private static final String TOPIC = "route-reaper";
+ private static final int NUM_PARALLEL_JOBS = 10;
+
+ private RouteAdminService routeService;
+ private final ClusterService clusterService;
+ private StorageService storageService;
+
+ private WorkQueue<NodeId> queue;
+
+ private final InternalClusterListener clusterListener = new InternalClusterListener();
+
+ private final ScheduledExecutorService reaperExecutor =
+ newSingleThreadScheduledExecutor(groupedThreads("route/reaper", "", log));
+
+ /**
+ * Creates a new route monitor.
+ *
+ * @param routeService route service
+ * @param clusterService cluster service
+ * @param storageService storage service
+ */
+ public RouteMonitor(RouteAdminService routeService,
+ ClusterService clusterService, StorageService storageService) {
+ this.routeService = routeService;
+ this.clusterService = clusterService;
+ this.storageService = storageService;
+
+ clusterService.addListener(clusterListener);
+
+ queue = storageService.getWorkQueue(TOPIC, Serializer.using(KryoNamespaces.API));
+ queue.addStatusChangeListener(this::statusChange);
+
+ startProcessing();
+ }
+
+ /**
+ * Shuts down the route monitor.
+ */
+ public void shutdown() {
+ stopProcessing();
+ clusterService.removeListener(clusterListener);
+ }
+
+ private void statusChange(DistributedPrimitive.Status status) {
+ switch (status) {
+ case ACTIVE:
+ startProcessing();
+ break;
+ case SUSPENDED:
+ stopProcessing();
+ break;
+ case INACTIVE:
+ default:
+ break;
+ }
+ }
+
+ private void startProcessing() {
+ queue.registerTaskProcessor(this::cleanRoutes, NUM_PARALLEL_JOBS, reaperExecutor);
+ }
+
+ private void stopProcessing() {
+ queue.stopProcessing();
+ }
+
+ private void cleanRoutes(NodeId node) {
+ log.info("Cleaning routes from unavailable node {}", node);
+
+ Collection<Route> routes = routeService.getRouteTables().stream()
+ .flatMap(id -> routeService.getRoutes(id).stream())
+ .flatMap(route -> route.allRoutes().stream())
+ .map(ResolvedRoute::route)
+ .filter(r -> r.sourceNode().equals(node))
+ .collect(Collectors.toList());
+
+ log.debug("Withdrawing routes: {}", routes);
+
+ routeService.withdraw(routes);
+ }
+
+ private class InternalClusterListener implements ClusterEventListener {
+
+ @Override
+ public void event(ClusterEvent event) {
+ switch (event.type()) {
+ case INSTANCE_DEACTIVATED:
+ NodeId id = event.subject().id();
+ log.info("Node {} deactivated", id);
+ queue.addOne(id);
+ break;
+ case INSTANCE_ADDED:
+ case INSTANCE_REMOVED:
+ case INSTANCE_ACTIVATED:
+ case INSTANCE_READY:
+ default:
+ break;
+ }
+ }
+ }
+
+}