| /* |
| * 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.evpnrouteservice.impl; |
| |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.concurrent.BlockingQueue; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.LinkedBlockingQueue; |
| import java.util.concurrent.ThreadFactory; |
| |
| import javax.annotation.concurrent.GuardedBy; |
| |
| import org.apache.felix.scr.annotations.Activate; |
| import org.apache.felix.scr.annotations.Component; |
| import org.apache.felix.scr.annotations.Deactivate; |
| import org.apache.felix.scr.annotations.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.apache.felix.scr.annotations.Service; |
| |
| import org.onosproject.evpnrouteservice.EvpnInternalRouteEvent; |
| import org.onosproject.evpnrouteservice.EvpnRoute; |
| import org.onosproject.evpnrouteservice.EvpnRouteAdminService; |
| import org.onosproject.evpnrouteservice.EvpnRouteEvent; |
| import org.onosproject.evpnrouteservice.EvpnRouteListener; |
| import org.onosproject.evpnrouteservice.EvpnRouteService; |
| import org.onosproject.evpnrouteservice.EvpnRouteSet; |
| import org.onosproject.evpnrouteservice.EvpnRouteStore; |
| import org.onosproject.evpnrouteservice.EvpnRouteStoreDelegate; |
| import org.onosproject.evpnrouteservice.EvpnRouteTableId; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import static java.util.concurrent.Executors.newSingleThreadExecutor; |
| import static org.onlab.util.Tools.groupedThreads; |
| |
| /** |
| * Implementation of the EVPN route service. |
| */ |
| @Service |
| @Component |
| public class EvpnRouteManager implements EvpnRouteService, |
| EvpnRouteAdminService { |
| |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected EvpnRouteStore evpnRouteStore; |
| |
| @GuardedBy(value = "this") |
| private Map<EvpnRouteListener, EvpnListenerQueue> listeners = new |
| HashMap<>(); |
| |
| private ThreadFactory threadFactory; |
| |
| private EvpnRouteStoreDelegate evpnRouteStoreDelegate = new |
| InternalEvpnRouteStoreDelegate(); |
| |
| @Activate |
| protected void activate() { |
| threadFactory = groupedThreads("onos/route", "listener-%d", log); |
| evpnRouteStore.setDelegate(evpnRouteStoreDelegate); |
| |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| evpnRouteStore.unsetDelegate(evpnRouteStoreDelegate); |
| listeners.values().forEach(EvpnListenerQueue::stop); |
| } |
| |
| /** |
| * {@inheritDoc} |
| * <p> |
| * In a departure from other services in ONOS, calling addListener will |
| * cause all current routes to be pushed to the listener before any new |
| * events are sent. This allows a listener to easily get the exact set of |
| * routes without worrying about missing any. |
| * |
| * @param listener listener to be added |
| */ |
| @Override |
| public void addListener(EvpnRouteListener listener) { |
| synchronized (this) { |
| EvpnListenerQueue l = createListenerQueue(listener); |
| |
| evpnRouteStore.getRouteTables().forEach(routeTableId |
| -> { |
| Collection<EvpnRouteSet> routes |
| = evpnRouteStore.getRoutes(routeTableId); |
| if (routes != null) { |
| routes.forEach(route -> { |
| Collection<EvpnRoute> evpnRoutes = route.routes(); |
| for (EvpnRoute evpnRoute : evpnRoutes) { |
| l.post(new EvpnRouteEvent( |
| EvpnRouteEvent.Type.ROUTE_ADDED, |
| evpnRoute, |
| route.routes())); |
| } |
| }); |
| } |
| }); |
| listeners.put(listener, l); |
| |
| l.start(); |
| log.debug("Route synchronization complete"); |
| } |
| } |
| |
| @Override |
| public void removeListener(EvpnRouteListener listener) { |
| synchronized (this) { |
| EvpnListenerQueue l = listeners.remove(listener); |
| if (l != null) { |
| l.stop(); |
| } |
| } |
| } |
| |
| /** |
| * Posts an event to all listeners. |
| * |
| * @param event event |
| */ |
| |
| private void post(EvpnRouteEvent event) { |
| if (event != null) { |
| log.debug("Sending event {}", event); |
| synchronized (this) { |
| listeners.values().forEach(l -> l.post(event)); |
| } |
| } |
| } |
| |
| |
| public Collection<EvpnRouteTableId> getRouteTables() { |
| return evpnRouteStore.getRouteTables(); |
| } |
| |
| @Override |
| public void update(Collection<EvpnRoute> routes) { |
| synchronized (this) { |
| routes.forEach(route -> { |
| log.debug("Received update {}", route); |
| evpnRouteStore.updateRoute(route); |
| }); |
| } |
| } |
| |
| @Override |
| public void withdraw(Collection<EvpnRoute> routes) { |
| synchronized (this) { |
| routes.forEach(route -> { |
| log.debug("Received withdraw {}", route); |
| evpnRouteStore.removeRoute(route); |
| }); |
| } |
| } |
| |
| /** |
| * Creates a new listener queue. |
| * |
| * @param listener route listener |
| * @return listener queue |
| */ |
| DefaultListenerQueue createListenerQueue(EvpnRouteListener listener) { |
| return new DefaultListenerQueue(listener); |
| } |
| |
| /** |
| * Default route listener queue. |
| */ |
| private class DefaultListenerQueue implements EvpnListenerQueue { |
| |
| private final ExecutorService executorService; |
| private final BlockingQueue<EvpnRouteEvent> queue; |
| private final EvpnRouteListener listener; |
| |
| /** |
| * Creates a new listener queue. |
| * |
| * @param listener route listener to queue updates for |
| */ |
| public DefaultListenerQueue(EvpnRouteListener listener) { |
| this.listener = listener; |
| queue = new LinkedBlockingQueue<>(); |
| executorService = newSingleThreadExecutor(threadFactory); |
| } |
| |
| @Override |
| public void post(EvpnRouteEvent event) { |
| queue.add(event); |
| } |
| |
| @Override |
| public void start() { |
| executorService.execute(this::poll); |
| } |
| |
| @Override |
| public void stop() { |
| executorService.shutdown(); |
| } |
| |
| private void poll() { |
| while (true) { |
| try { |
| listener.event(queue.take()); |
| } catch (InterruptedException e) { |
| log.info("Route listener event thread shutting down: {}", e.getMessage()); |
| break; |
| } catch (Exception e) { |
| log.warn("Exception during route event handler", e); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Delegate to receive events from the route store. |
| */ |
| private class InternalEvpnRouteStoreDelegate implements |
| EvpnRouteStoreDelegate { |
| EvpnRouteSet routes; |
| |
| @Override |
| public void notify(EvpnInternalRouteEvent event) { |
| switch (event.type()) { |
| case ROUTE_ADDED: |
| routes = event.subject(); |
| if (routes != null) { |
| Collection<EvpnRoute> evpnRoutes = routes.routes(); |
| for (EvpnRoute evpnRoute : evpnRoutes) { |
| post(new EvpnRouteEvent( |
| EvpnRouteEvent.Type.ROUTE_ADDED, |
| evpnRoute, |
| routes.routes())); |
| } |
| } |
| break; |
| case ROUTE_REMOVED: |
| routes = event.subject(); |
| if (routes != null) { |
| Collection<EvpnRoute> evpnRoutes = routes.routes(); |
| for (EvpnRoute evpnRoute : evpnRoutes) { |
| post(new EvpnRouteEvent( |
| EvpnRouteEvent.Type.ROUTE_REMOVED, |
| evpnRoute, |
| routes.routes())); |
| } |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| |
| } |