opendaylight/md-sal/sal-remoterpc-connector/src/main/java/org/opendaylight/controller/remote/rpc/registry/RpcRegistry.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.controller.remote.rpc.registry;
   9
  10 import akka.actor.ActorRef;
  11 import akka.actor.Address;
  12 import akka.actor.Props;
  13 import com.google.common.base.Preconditions;
  14 import com.google.common.collect.ImmutableMap;
  15 import com.google.common.collect.ImmutableSet;
  16 import java.util.ArrayList;
  17 import java.util.Collection;
  18 import java.util.HashMap;
  19 import java.util.List;
  20 import java.util.Map;
  21 import java.util.Map.Entry;
  22 import java.util.Optional;
  23 import java.util.Set;
  24 import org.opendaylight.controller.md.sal.dom.api.DOMRpcIdentifier;
  25 import org.opendaylight.controller.remote.rpc.RemoteRpcProviderConfig;
  26 import org.opendaylight.controller.remote.rpc.RouteIdentifierImpl;
  27 import org.opendaylight.controller.remote.rpc.registry.RpcRegistry.Messages.AddOrUpdateRoutes;
  28 import org.opendaylight.controller.remote.rpc.registry.RpcRegistry.Messages.RemoveRoutes;
  29 import org.opendaylight.controller.remote.rpc.registry.RpcRegistry.Messages.UpdateRemoteEndpoints;
  30 import org.opendaylight.controller.remote.rpc.registry.gossip.Bucket;
  31 import org.opendaylight.controller.remote.rpc.registry.gossip.BucketStore;
  32 import org.opendaylight.controller.sal.connector.api.RpcRouter;
  33 import org.opendaylight.controller.sal.connector.api.RpcRouter.RouteIdentifier;
  34 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  35
  36 /**
  37  * Registry to look up cluster nodes that have registered for a given RPC.
  38  *
  39  * <p>
  40  * It uses {@link org.opendaylight.controller.remote.rpc.registry.gossip.BucketStore} to maintain this
  41  * cluster wide information.
  42  */
  43 public class RpcRegistry extends BucketStore<RoutingTable> {
  44     private final ActorRef rpcRegistrar;
  45
  46     public RpcRegistry(final RemoteRpcProviderConfig config, final ActorRef rpcInvoker, final ActorRef rpcRegistrar) {
  47         super(config, new RoutingTable(rpcInvoker));
  48         this.rpcRegistrar = Preconditions.checkNotNull(rpcRegistrar);
  49     }
  50
  51     /**
  52      * Create a new props instance for instantiating an RpcRegistry actor.
  53      *
  54      * @param config Provider configuration
  55      * @param rpcRegistrar Local RPC provider interface, used to register routers to remote nodes
  56      * @param rpcInvoker Actor handling RPC invocation requests from remote nodes
  57      * @return A new {@link Props} instance
  58      */
  59     public static Props props(final RemoteRpcProviderConfig config, final ActorRef rpcInvoker,
  60             final ActorRef rpcRegistrar) {
  61         return Props.create(RpcRegistry.class, config, rpcInvoker, rpcRegistrar);
  62     }
  63
  64     @Override
  65     protected void handleReceive(final Object message) throws Exception {
  66         if (message instanceof AddOrUpdateRoutes) {
  67             receiveAddRoutes((AddOrUpdateRoutes) message);
  68         } else if (message instanceof RemoveRoutes) {
  69             receiveRemoveRoutes((RemoveRoutes) message);
  70         } else {
  71             super.handleReceive(message);
  72         }
  73     }
  74
  75     private void receiveAddRoutes(final AddOrUpdateRoutes msg) {
  76         LOG.debug("AddOrUpdateRoutes: {}", msg.getRouteIdentifiers());
  77
  78         RoutingTable table = getLocalBucket().getData().copy();
  79         for (RpcRouter.RouteIdentifier<?, ?, ?> routeId : msg.getRouteIdentifiers()) {
  80             table.addRoute(routeId);
  81         }
  82
  83         updateLocalBucket(table);
  84     }
  85
  86     /**
  87      * Processes a RemoveRoutes message.
  88      *
  89      * @param msg contains list of route ids to remove
  90      */
  91     private void receiveRemoveRoutes(final RemoveRoutes msg) {
  92         RoutingTable table = getLocalBucket().getData().copy();
  93         for (RpcRouter.RouteIdentifier<?, ?, ?> routeId : msg.getRouteIdentifiers()) {
  94             table.removeRoute(routeId);
  95         }
  96
  97         updateLocalBucket(table);
  98     }
  99
 100     @Override
 101     protected void onBucketRemoved(final Address address, final Bucket<RoutingTable> bucket) {
 102         rpcRegistrar.tell(new UpdateRemoteEndpoints(ImmutableMap.of(address, Optional.empty())), ActorRef.noSender());
 103     }
 104
 105     @Override
 106     protected void onBucketsUpdated(final Map<Address, Bucket<RoutingTable>> buckets) {
 107         final Map<Address, Optional<RemoteRpcEndpoint>> endpoints = new HashMap<>(buckets.size());
 108
 109         for (Entry<Address, Bucket<RoutingTable>> e : buckets.entrySet()) {
 110             final RoutingTable table = e.getValue().getData();
 111
 112             final List<DOMRpcIdentifier> rpcs = new ArrayList<>(table.getRoutes().size());
 113             for (RouteIdentifier<?, ?, ?> ri : table.getRoutes()) {
 114                 if (ri instanceof RouteIdentifierImpl) {
 115                     final RouteIdentifierImpl id = (RouteIdentifierImpl) ri;
 116                     rpcs.add(DOMRpcIdentifier.create(SchemaPath.create(true, id.getType()), id.getRoute()));
 117                 } else {
 118                     LOG.warn("Skipping unsupported route {} from {}", ri, e.getKey());
 119                 }
 120             }
 121
 122             endpoints.put(e.getKey(), rpcs.isEmpty() ? Optional.empty()
 123                     : Optional.of(new RemoteRpcEndpoint(table.getRouter(), rpcs)));
 124         }
 125
 126         if (!endpoints.isEmpty()) {
 127             rpcRegistrar.tell(new UpdateRemoteEndpoints(endpoints), ActorRef.noSender());
 128         }
 129     }
 130
 131     public static final class RemoteRpcEndpoint {
 132         private final Set<DOMRpcIdentifier> rpcs;
 133         private final ActorRef router;
 134
 135         RemoteRpcEndpoint(final ActorRef router, final Collection<DOMRpcIdentifier> rpcs) {
 136             this.router = Preconditions.checkNotNull(router);
 137             this.rpcs = ImmutableSet.copyOf(rpcs);
 138         }
 139
 140         public ActorRef getRouter() {
 141             return router;
 142         }
 143
 144         public Set<DOMRpcIdentifier> getRpcs() {
 145             return rpcs;
 146         }
 147     }
 148
 149     /**
 150      * All messages used by the RpcRegistry.
 151      */
 152     public static class Messages {
 153         abstract static class AbstractRouteMessage {
 154             final List<RpcRouter.RouteIdentifier<?, ?, ?>> routeIdentifiers;
 155
 156             AbstractRouteMessage(final List<RpcRouter.RouteIdentifier<?, ?, ?>> routeIdentifiers) {
 157                 Preconditions.checkArgument(routeIdentifiers != null && !routeIdentifiers.isEmpty(),
 158                         "Route Identifiers must be supplied");
 159                 this.routeIdentifiers = routeIdentifiers;
 160             }
 161
 162             List<RpcRouter.RouteIdentifier<?, ?, ?>> getRouteIdentifiers() {
 163                 return this.routeIdentifiers;
 164             }
 165
 166             @Override
 167             public String toString() {
 168                 return "ContainsRoute{" + "routeIdentifiers=" + routeIdentifiers + '}';
 169             }
 170         }
 171
 172         public static final class AddOrUpdateRoutes extends AbstractRouteMessage {
 173             public AddOrUpdateRoutes(final List<RpcRouter.RouteIdentifier<?, ?, ?>> routeIdentifiers) {
 174                 super(routeIdentifiers);
 175             }
 176         }
 177
 178         public static final class RemoveRoutes extends AbstractRouteMessage {
 179             public RemoveRoutes(final List<RpcRouter.RouteIdentifier<?, ?, ?>> routeIdentifiers) {
 180                 super(routeIdentifiers);
 181             }
 182         }
 183
 184         public static final class UpdateRemoteEndpoints {
 185             private final Map<Address, Optional<RemoteRpcEndpoint>> endpoints;
 186
 187             UpdateRemoteEndpoints(final Map<Address, Optional<RemoteRpcEndpoint>> endpoints) {
 188                 this.endpoints = ImmutableMap.copyOf(endpoints);
 189             }
 190
 191             public Map<Address, Optional<RemoteRpcEndpoint>> getEndpoints() {
 192                 return endpoints;
 193             }
 194         }
 195     }
 196 }