netconf/netconf-topology-singleton/src/main/java/org/opendaylight/netconf/topology/singleton/impl/ProxyDOMRpcService.java

   1 /*
   2  * Copyright (c) 2016 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.netconf.topology.singleton.impl;
  10
  11 import akka.actor.ActorRef;
  12 import akka.actor.ActorSystem;
  13 import akka.dispatch.OnComplete;
  14 import akka.pattern.Patterns;
  15 import com.google.common.base.Function;
  16 import com.google.common.util.concurrent.CheckedFuture;
  17 import com.google.common.util.concurrent.Futures;
  18 import com.google.common.util.concurrent.SettableFuture;
  19 import java.util.Collection;
  20 import javax.annotation.Nonnull;
  21 import javax.annotation.Nullable;
  22 import org.opendaylight.controller.md.sal.dom.api.DOMRpcAvailabilityListener;
  23 import org.opendaylight.controller.md.sal.dom.api.DOMRpcException;
  24 import org.opendaylight.controller.md.sal.dom.api.DOMRpcResult;
  25 import org.opendaylight.controller.md.sal.dom.api.DOMRpcService;
  26 import org.opendaylight.controller.md.sal.dom.spi.DefaultDOMRpcResult;
  27 import org.opendaylight.netconf.sal.connect.util.RemoteDeviceId;
  28 import org.opendaylight.netconf.topology.singleton.impl.utils.ClusteringRpcException;
  29 import org.opendaylight.netconf.topology.singleton.impl.utils.NetconfTopologyUtils;
  30 import org.opendaylight.netconf.topology.singleton.messages.NormalizedNodeMessage;
  31 import org.opendaylight.netconf.topology.singleton.messages.SchemaPathMessage;
  32 import org.opendaylight.netconf.topology.singleton.messages.rpc.InvokeRpcMessage;
  33 import org.opendaylight.netconf.topology.singleton.messages.rpc.InvokeRpcMessageReply;
  34 import org.opendaylight.netconf.topology.singleton.messages.transactions.EmptyResultResponse;
  35 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  36 import org.opendaylight.yangtools.yang.common.RpcError;
  37 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  38 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  39 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  40 import org.slf4j.Logger;
  41 import org.slf4j.LoggerFactory;
  42 import scala.concurrent.Future;
  43
  44 public class ProxyDOMRpcService implements DOMRpcService {
  45
  46     private static final Logger LOG = LoggerFactory.getLogger(NetconfTopologyManager.class);
  47
  48     private final ActorRef masterActorRef;
  49     private final ActorSystem actorSystem;
  50     private final RemoteDeviceId id;
  51
  52     public ProxyDOMRpcService(final ActorSystem actorSystem, final ActorRef masterActorRef,
  53                               final RemoteDeviceId remoteDeviceId) {
  54         this.actorSystem = actorSystem;
  55         this.masterActorRef = masterActorRef;
  56         id = remoteDeviceId;
  57     }
  58
  59     @Nonnull
  60     @Override
  61     public CheckedFuture<DOMRpcResult, DOMRpcException> invokeRpc(@Nonnull final SchemaPath type,
  62                                                                   @Nullable final NormalizedNode<?, ?> input) {
  63         LOG.trace("{}: Rpc operation invoked with schema type: {} and node: {}.", id, type, input);
  64
  65         final NormalizedNodeMessage normalizedNodeMessage =
  66                 new NormalizedNodeMessage(YangInstanceIdentifier.EMPTY, input);
  67         final Future<Object> scalaFuture =
  68                 Patterns.ask(masterActorRef,
  69                         new InvokeRpcMessage(new SchemaPathMessage(type), normalizedNodeMessage),
  70                         NetconfTopologyUtils.TIMEOUT);
  71
  72         final SettableFuture<DOMRpcResult> settableFuture = SettableFuture.create();
  73
  74         final CheckedFuture<DOMRpcResult, DOMRpcException> checkedFuture = Futures.makeChecked(settableFuture,
  75                 new Function<Exception, DOMRpcException>() {
  76
  77             @Nullable
  78             @Override
  79             public DOMRpcException apply(@Nullable final Exception exception) {
  80                 return new ClusteringRpcException(id + ": Exception during remote rpc invocation.",
  81                         exception);
  82             }
  83         });
  84
  85         scalaFuture.onComplete(new OnComplete<Object>() {
  86             @Override
  87             public void onComplete(final Throwable failure, final Object success) throws Throwable {
  88                 if (failure != null) {
  89                     settableFuture.setException(failure);
  90                     return;
  91                 }
  92                 if (success instanceof Throwable) {
  93                     settableFuture.setException((Throwable) success);
  94                     return;
  95                 }
  96                 if (success instanceof EmptyResultResponse || success == null) {
  97                     settableFuture.set(null);
  98                     return;
  99                 }
 100                 final Collection<RpcError> errors = ((InvokeRpcMessageReply) success).getRpcErrors();
 101                 final NormalizedNodeMessage normalizedNodeMessageResult =
 102                         ((InvokeRpcMessageReply) success).getNormalizedNodeMessage();
 103                 final DOMRpcResult result;
 104                 if (normalizedNodeMessageResult == null ){
 105                     result = new DefaultDOMRpcResult(errors);
 106                 } else {
 107                     if (errors == null) {
 108                         result = new DefaultDOMRpcResult(normalizedNodeMessageResult.getNode());
 109                     } else {
 110                         result = new DefaultDOMRpcResult(normalizedNodeMessageResult.getNode(), errors);
 111                     }
 112                 }
 113                 settableFuture.set(result);
 114             }
 115         }, actorSystem.dispatcher());
 116
 117         return checkedFuture;
 118
 119     }
 120
 121     @Nonnull
 122     @Override
 123     public <T extends DOMRpcAvailabilityListener> ListenerRegistration<T> registerRpcListener(
 124             @Nonnull final T listener) {
 125         // NOOP, only proxy
 126         throw new UnsupportedOperationException("RegisterRpcListener: DOMRpc service not working in cluster.");
 127     }
 128 }