opendaylight/md-sal/sal-remoterpc-connector/src/main/java/org/opendaylight/controller/remote/rpc/RpcBroker.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
   9 package org.opendaylight.controller.remote.rpc;
  10
  11 import static akka.pattern.Patterns.ask;
  12 import akka.actor.ActorRef;
  13 import akka.actor.Props;
  14 import akka.dispatch.OnComplete;
  15 import akka.japi.Creator;
  16 import akka.japi.Pair;
  17 import akka.util.Timeout;
  18
  19 import org.opendaylight.controller.remote.rpc.messages.ExecuteRpc;
  20 import org.opendaylight.controller.remote.rpc.messages.InvokeRpc;
  21 import org.opendaylight.controller.remote.rpc.messages.RpcResponse;
  22 import org.opendaylight.controller.remote.rpc.utils.LatestEntryRoutingLogic;
  23 import org.opendaylight.controller.remote.rpc.registry.RpcRegistry;
  24 import org.opendaylight.controller.remote.rpc.utils.ActorUtil;
  25 import org.opendaylight.controller.remote.rpc.utils.RoutingLogic;
  26 import org.opendaylight.controller.xml.codec.XmlUtils;
  27 import org.opendaylight.controller.sal.connector.api.RpcRouter;
  28 import org.opendaylight.controller.sal.core.api.Broker;
  29 import org.opendaylight.controller.sal.core.api.Broker.ProviderSession;
  30 import org.opendaylight.yangtools.yang.common.RpcError;
  31 import org.opendaylight.yangtools.yang.common.RpcError.ErrorType;
  32 import org.opendaylight.yangtools.yang.common.RpcResult;
  33 import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
  34 import org.opendaylight.yangtools.yang.data.api.CompositeNode;
  35 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  36 import org.slf4j.Logger;
  37 import org.slf4j.LoggerFactory;
  38
  39 import com.google.common.util.concurrent.FutureCallback;
  40 import com.google.common.util.concurrent.Futures;
  41 import com.google.common.util.concurrent.JdkFutureAdapters;
  42 import com.google.common.util.concurrent.ListenableFuture;
  43
  44 import java.util.Arrays;
  45 import java.util.Collection;
  46 import java.util.List;
  47 import java.util.concurrent.Future;
  48
  49 /**
  50  * Actor to initiate execution of remote RPC on other nodes of the cluster.
  51  */
  52
  53 public class RpcBroker extends AbstractUntypedActor {
  54
  55     private static final Logger LOG = LoggerFactory.getLogger(RpcBroker.class);
  56     private final Broker.ProviderSession brokerSession;
  57     private final ActorRef rpcRegistry;
  58     private final SchemaContext schemaContext;
  59
  60     private RpcBroker(Broker.ProviderSession brokerSession, ActorRef rpcRegistry,
  61             SchemaContext schemaContext) {
  62         this.brokerSession = brokerSession;
  63         this.rpcRegistry = rpcRegistry;
  64         this.schemaContext = schemaContext;
  65     }
  66
  67     public static Props props(Broker.ProviderSession brokerSession, ActorRef rpcRegistry,
  68             SchemaContext schemaContext) {
  69         return Props.create(new RpcBrokerCreator(brokerSession, rpcRegistry, schemaContext));
  70     }
  71
  72     @Override
  73     protected void handleReceive(Object message) throws Exception {
  74         if(message instanceof InvokeRpc) {
  75             invokeRemoteRpc((InvokeRpc) message);
  76         } else if(message instanceof ExecuteRpc) {
  77             executeRpc((ExecuteRpc) message);
  78         }
  79     }
  80
  81     private void invokeRemoteRpc(final InvokeRpc msg) {
  82         LOG.debug("Looking up the remote actor for rpc {}", msg.getRpc());
  83
  84         RpcRouter.RouteIdentifier<?,?,?> routeId = new RouteIdentifierImpl(
  85                 null, msg.getRpc(), msg.getIdentifier());
  86         RpcRegistry.Messages.FindRouters findMsg = new RpcRegistry.Messages.FindRouters(routeId);
  87
  88         scala.concurrent.Future<Object> future = ask(rpcRegistry, findMsg,
  89                 new Timeout(ActorUtil.LOCAL_ASK_DURATION));
  90
  91         final ActorRef sender = getSender();
  92         final ActorRef self = self();
  93
  94         OnComplete<Object> onComplete = new OnComplete<Object>() {
  95             @Override
  96             public void onComplete(Throwable failure, Object reply) throws Throwable {
  97                 if(failure != null) {
  98                     LOG.error("FindRouters failed", failure);
  99                     sender.tell(new akka.actor.Status.Failure(failure), self);
 100                     return;
 101                 }
 102
 103                 RpcRegistry.Messages.FindRoutersReply findReply =
 104                                                 (RpcRegistry.Messages.FindRoutersReply)reply;
 105
 106                 List<Pair<ActorRef, Long>> actorRefList = findReply.getRouterWithUpdateTime();
 107
 108                 if(actorRefList == null || actorRefList.isEmpty()) {
 109                     String message = String.format(
 110                             "No remote implementation found for rpc %s",  msg.getRpc());
 111                     sender.tell(new akka.actor.Status.Failure(new RpcErrorsException(
 112                             message, Arrays.asList(RpcResultBuilder.newError(ErrorType.RPC,
 113                                     "operation-not-supported", message)))), self);
 114                     return;
 115                 }
 116
 117                 finishInvokeRpc(actorRefList, msg, sender, self);
 118             }
 119         };
 120
 121         future.onComplete(onComplete, getContext().dispatcher());
 122     }
 123
 124     protected void finishInvokeRpc(final List<Pair<ActorRef, Long>> actorRefList,
 125             final InvokeRpc msg, final ActorRef sender, final ActorRef self) {
 126
 127         RoutingLogic logic = new LatestEntryRoutingLogic(actorRefList);
 128
 129         ExecuteRpc executeMsg = new ExecuteRpc(XmlUtils.inputCompositeNodeToXml(msg.getInput(),
 130                 schemaContext), msg.getRpc());
 131
 132         scala.concurrent.Future<Object> future = ask(logic.select(), executeMsg,
 133                 new Timeout(ActorUtil.REMOTE_ASK_DURATION));
 134
 135         OnComplete<Object> onComplete = new OnComplete<Object>() {
 136             @Override
 137             public void onComplete(Throwable failure, Object reply) throws Throwable {
 138                 if(failure != null) {
 139                     LOG.error("ExecuteRpc failed", failure);
 140                     sender.tell(new akka.actor.Status.Failure(failure), self);
 141                     return;
 142                 }
 143
 144                 sender.tell(reply, self);
 145             }
 146         };
 147
 148         future.onComplete(onComplete, getContext().dispatcher());
 149     }
 150
 151     private void executeRpc(final ExecuteRpc msg) {
 152         LOG.debug("Executing rpc {}", msg.getRpc());
 153
 154         Future<RpcResult<CompositeNode>> future = brokerSession.rpc(msg.getRpc(),
 155                 XmlUtils.inputXmlToCompositeNode(msg.getRpc(), msg.getInputCompositeNode(),
 156                         schemaContext));
 157
 158         ListenableFuture<RpcResult<CompositeNode>> listenableFuture =
 159                 JdkFutureAdapters.listenInPoolThread(future);
 160
 161         final ActorRef sender = getSender();
 162         final ActorRef self = self();
 163
 164         Futures.addCallback(listenableFuture, new FutureCallback<RpcResult<CompositeNode>>() {
 165             @Override
 166             public void onSuccess(RpcResult<CompositeNode> result) {
 167                 if(result.isSuccessful()) {
 168                     sender.tell(new RpcResponse(XmlUtils.outputCompositeNodeToXml(result.getResult(),
 169                             schemaContext)), self);
 170                 } else {
 171                     String message = String.format("Execution of RPC %s failed",  msg.getRpc());
 172                     Collection<RpcError> errors = result.getErrors();
 173                     if(errors == null || errors.size() == 0) {
 174                         errors = Arrays.asList(RpcResultBuilder.newError(ErrorType.RPC,
 175                                 null, message));
 176                     }
 177
 178                     sender.tell(new akka.actor.Status.Failure(new RpcErrorsException(
 179                             message, errors)), self);
 180                 }
 181             }
 182
 183             @Override
 184             public void onFailure(Throwable t) {
 185                 LOG.error("executeRpc for {} failed: {}", msg.getRpc(), t);
 186                 sender.tell(new akka.actor.Status.Failure(t), self);
 187             }
 188         });
 189     }
 190
 191     private static class RpcBrokerCreator implements Creator<RpcBroker> {
 192         private static final long serialVersionUID = 1L;
 193
 194         final Broker.ProviderSession brokerSession;
 195         final ActorRef rpcRegistry;
 196         final SchemaContext schemaContext;
 197
 198         RpcBrokerCreator(ProviderSession brokerSession, ActorRef rpcRegistry,
 199                 SchemaContext schemaContext) {
 200             this.brokerSession = brokerSession;
 201             this.rpcRegistry = rpcRegistry;
 202             this.schemaContext = schemaContext;
 203         }
 204
 205         @Override
 206         public RpcBroker create() throws Exception {
 207             return new RpcBroker(brokerSession, rpcRegistry, schemaContext);
 208         }
 209     }
 210 }