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.annotations.VisibleForTesting;
  14 import com.google.common.base.Preconditions;
  15 import com.google.common.collect.ImmutableList;
  16 import com.google.common.collect.ImmutableMap;
  17 import com.google.common.collect.ImmutableSet;
  18 import java.util.Collection;
  19 import java.util.HashMap;
  20 import java.util.List;
  21 import java.util.Map;
  22 import java.util.Map.Entry;
  23 import java.util.Optional;
  24 import java.util.Set;
  25 import org.opendaylight.controller.remote.rpc.RemoteRpcProviderConfig;
  26 import org.opendaylight.controller.remote.rpc.registry.RpcRegistry.Messages.AddOrUpdateRoutes;
  27 import org.opendaylight.controller.remote.rpc.registry.RpcRegistry.Messages.RemoveRoutes;
  28 import org.opendaylight.controller.remote.rpc.registry.RpcRegistry.Messages.UpdateRemoteEndpoints;
  29 import org.opendaylight.controller.remote.rpc.registry.gossip.Bucket;
  30 import org.opendaylight.controller.remote.rpc.registry.gossip.BucketStoreAccess;
  31 import org.opendaylight.controller.remote.rpc.registry.gossip.BucketStoreActor;
  32 import org.opendaylight.controller.remote.rpc.registry.mbeans.RemoteRpcRegistryMXBeanImpl;
  33 import org.opendaylight.mdsal.dom.api.DOMRpcIdentifier;
  34
  35 /**
  36  * Registry to look up cluster nodes that have registered for a given RPC.
  37  *
  38  * <p>
  39  * It uses {@link org.opendaylight.controller.remote.rpc.registry.gossip.BucketStoreActor} to maintain this
  40  * cluster wide information.
  41  */
  42 public class RpcRegistry extends BucketStoreActor<RoutingTable> {
  43     private final ActorRef rpcRegistrar;
  44     private final RemoteRpcRegistryMXBeanImpl mxBean;
  45
  46     public RpcRegistry(final RemoteRpcProviderConfig config, final ActorRef rpcInvoker, final ActorRef rpcRegistrar) {
  47         super(config, config.getRpcRegistryPersistenceId(), new RoutingTable(rpcInvoker, ImmutableSet.of()));
  48         this.rpcRegistrar = Preconditions.checkNotNull(rpcRegistrar);
  49         this.mxBean = new RemoteRpcRegistryMXBeanImpl(new BucketStoreAccess(self(), getContext().dispatcher(),
  50                 config.getAskDuration()), config.getAskDuration());
  51     }
  52
  53     /**
  54      * Create a new props instance for instantiating an RpcRegistry actor.
  55      *
  56      * @param config Provider configuration
  57      * @param rpcRegistrar Local RPC provider interface, used to register routers to remote nodes
  58      * @param rpcInvoker Actor handling RPC invocation requests from remote nodes
  59      * @return A new {@link Props} instance
  60      */
  61     public static Props props(final RemoteRpcProviderConfig config, final ActorRef rpcInvoker,
  62             final ActorRef rpcRegistrar) {
  63         return Props.create(RpcRegistry.class, config, rpcInvoker, rpcRegistrar);
  64     }
  65
  66     @Override
  67     public void postStop() {
  68         super.postStop();
  69         this.mxBean.unregister();
  70     }
  71
  72     @Override
  73     protected void handleCommand(final Object message) throws Exception {
  74         if (message instanceof AddOrUpdateRoutes) {
  75             receiveAddRoutes((AddOrUpdateRoutes) message);
  76         } else if (message instanceof RemoveRoutes) {
  77             receiveRemoveRoutes((RemoveRoutes) message);
  78         } else {
  79             super.handleCommand(message);
  80         }
  81     }
  82
  83     private void receiveAddRoutes(final AddOrUpdateRoutes msg) {
  84         LOG.debug("AddOrUpdateRoutes: {}", msg.getRouteIdentifiers());
  85         updateLocalBucket(getLocalData().addRpcs(msg.getRouteIdentifiers()));
  86     }
  87
  88     /**
  89      * Processes a RemoveRoutes message.
  90      *
  91      * @param msg contains list of route ids to remove
  92      */
  93     private void receiveRemoveRoutes(final RemoveRoutes msg) {
  94         LOG.debug("RemoveRoutes: {}", msg.getRouteIdentifiers());
  95         updateLocalBucket(getLocalData().removeRpcs(msg.getRouteIdentifiers()));
  96     }
  97
  98     @Override
  99     protected void onBucketRemoved(final Address address, final Bucket<RoutingTable> bucket) {
 100         rpcRegistrar.tell(new UpdateRemoteEndpoints(ImmutableMap.of(address, Optional.empty())), ActorRef.noSender());
 101     }
 102
 103     @Override
 104     protected void onBucketsUpdated(final Map<Address, Bucket<RoutingTable>> buckets) {
 105         final Map<Address, Optional<RemoteRpcEndpoint>> endpoints = new HashMap<>(buckets.size());
 106
 107         for (Entry<Address, Bucket<RoutingTable>> e : buckets.entrySet()) {
 108             final RoutingTable table = e.getValue().getData();
 109
 110             final Collection<DOMRpcIdentifier> rpcs = table.getRoutes();
 111             endpoints.put(e.getKey(), rpcs.isEmpty() ? Optional.empty()
 112                     : Optional.of(new RemoteRpcEndpoint(table.getRpcInvoker(), rpcs)));
 113         }
 114
 115         if (!endpoints.isEmpty()) {
 116             rpcRegistrar.tell(new UpdateRemoteEndpoints(endpoints), ActorRef.noSender());
 117         }
 118     }
 119
 120     public static final class RemoteRpcEndpoint {
 121         private final Set<DOMRpcIdentifier> rpcs;
 122         private final ActorRef router;
 123
 124         @VisibleForTesting
 125         public RemoteRpcEndpoint(final ActorRef router, final Collection<DOMRpcIdentifier> rpcs) {
 126             this.router = Preconditions.checkNotNull(router);
 127             this.rpcs = ImmutableSet.copyOf(rpcs);
 128         }
 129
 130         public ActorRef getRouter() {
 131             return router;
 132         }
 133
 134         public Set<DOMRpcIdentifier> getRpcs() {
 135             return rpcs;
 136         }
 137     }
 138
 139     /**
 140      * All messages used by the RpcRegistry.
 141      */
 142     public static class Messages {
 143         abstract static class AbstractRouteMessage {
 144             final List<DOMRpcIdentifier> routeIdentifiers;
 145
 146             AbstractRouteMessage(final Collection<DOMRpcIdentifier> routeIdentifiers) {
 147                 Preconditions.checkArgument(routeIdentifiers != null && !routeIdentifiers.isEmpty(),
 148                         "Route Identifiers must be supplied");
 149                 this.routeIdentifiers = ImmutableList.copyOf(routeIdentifiers);
 150             }
 151
 152             List<DOMRpcIdentifier> getRouteIdentifiers() {
 153                 return this.routeIdentifiers;
 154             }
 155
 156             @Override
 157             public String toString() {
 158                 return "ContainsRoute{" + "routeIdentifiers=" + routeIdentifiers + '}';
 159             }
 160         }
 161
 162         public static final class AddOrUpdateRoutes extends AbstractRouteMessage {
 163             public AddOrUpdateRoutes(final Collection<DOMRpcIdentifier> routeIdentifiers) {
 164                 super(routeIdentifiers);
 165             }
 166         }
 167
 168         public static final class RemoveRoutes extends AbstractRouteMessage {
 169             public RemoveRoutes(final Collection<DOMRpcIdentifier> routeIdentifiers) {
 170                 super(routeIdentifiers);
 171             }
 172         }
 173
 174         public static final class UpdateRemoteEndpoints {
 175             private final Map<Address, Optional<RemoteRpcEndpoint>> endpoints;
 176
 177             @VisibleForTesting
 178             public UpdateRemoteEndpoints(final Map<Address, Optional<RemoteRpcEndpoint>> endpoints) {
 179                 this.endpoints = ImmutableMap.copyOf(endpoints);
 180             }
 181
 182             public Map<Address, Optional<RemoteRpcEndpoint>> getEndpoints() {
 183                 return endpoints;
 184             }
 185         }
 186     }
 187 }