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

   1 package org.opendaylight.controller.remote.rpc;
   2
   3 import static akka.pattern.Patterns.ask;
   4
   5 import akka.actor.ActorRef;
   6 import akka.dispatch.OnComplete;
   7 import akka.japi.Pair;
   8 import com.google.common.util.concurrent.CheckedFuture;
   9 import com.google.common.util.concurrent.Futures;
  10 import java.util.List;
  11 import org.opendaylight.controller.md.sal.dom.api.DOMRpcException;
  12 import org.opendaylight.controller.md.sal.dom.api.DOMRpcIdentifier;
  13 import org.opendaylight.controller.md.sal.dom.api.DOMRpcImplementation;
  14 import org.opendaylight.controller.md.sal.dom.api.DOMRpcImplementationNotAvailableException;
  15 import org.opendaylight.controller.md.sal.dom.api.DOMRpcResult;
  16 import org.opendaylight.controller.remote.rpc.messages.ExecuteRpc;
  17 import org.opendaylight.controller.remote.rpc.registry.RpcRegistry;
  18 import org.opendaylight.controller.remote.rpc.registry.RpcRegistry.Messages.FindRoutersReply;
  19 import org.opendaylight.controller.remote.rpc.utils.LatestEntryRoutingLogic;
  20 import org.opendaylight.controller.sal.connector.api.RpcRouter;
  21 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  22 import org.slf4j.Logger;
  23 import org.slf4j.LoggerFactory;
  24 import scala.concurrent.ExecutionContext;
  25 import scala.concurrent.Future;
  26
  27 public class RemoteRpcImplementation implements DOMRpcImplementation {
  28     private static final Logger LOG = LoggerFactory.getLogger(RemoteRpcImplementation.class);
  29
  30     private final ActorRef rpcRegistry;
  31     private final RemoteRpcProviderConfig config;
  32
  33     public RemoteRpcImplementation(final ActorRef rpcRegistry, final RemoteRpcProviderConfig config) {
  34         this.config = config;
  35         this.rpcRegistry = rpcRegistry;
  36     }
  37
  38     @Override
  39     public CheckedFuture<DOMRpcResult, DOMRpcException> invokeRpc(final DOMRpcIdentifier rpc,
  40             final NormalizedNode<?, ?> input) {
  41         if (input instanceof RemoteRpcInput) {
  42             LOG.warn("Rpc {} was removed during execution or there is loop present. Failing received rpc.", rpc);
  43             return Futures
  44                     .<DOMRpcResult, DOMRpcException>immediateFailedCheckedFuture(new DOMRpcImplementationNotAvailableException(
  45                             "Rpc implementation for {} was removed during processing.", rpc));
  46         }
  47         final RemoteDOMRpcFuture frontEndFuture = RemoteDOMRpcFuture.create(rpc.getType().getLastComponent());
  48         findRouteAsync(rpc).onComplete(new OnComplete<FindRoutersReply>() {
  49
  50             @Override
  51             public void onComplete(final Throwable error, final FindRoutersReply routes) throws Throwable {
  52                 if (error != null) {
  53                     frontEndFuture.failNow(error);
  54                 } else {
  55                     final List<Pair<ActorRef, Long>> routePairs = routes.getRouterWithUpdateTime();
  56                     if (routePairs == null || routePairs.isEmpty()) {
  57                         frontEndFuture.failNow(new DOMRpcImplementationNotAvailableException(
  58                                 "No local or remote implementation available for rpc %s", rpc.getType(), error));
  59                     } else {
  60                         final ActorRef remoteImplRef = new LatestEntryRoutingLogic(routePairs).select();
  61                         final Object executeRpcMessage = ExecuteRpc.from(rpc, input);
  62                         LOG.debug("Found remote actor {} for rpc {} - sending {}", remoteImplRef, rpc.getType(), executeRpcMessage);
  63                         frontEndFuture.completeWith(ask(remoteImplRef, executeRpcMessage, config.getAskDuration()));
  64                     }
  65                 }
  66             }
  67         }, ExecutionContext.Implicits$.MODULE$.global());
  68         return frontEndFuture;
  69     }
  70
  71     @SuppressWarnings({"unchecked", "rawtypes"})
  72     private Future<FindRoutersReply> findRouteAsync(final DOMRpcIdentifier rpc) {
  73         // FIXME: Refactor routeId and message to use DOMRpcIdentifier directly.
  74         final RpcRouter.RouteIdentifier<?, ?, ?> routeId =
  75                 new RouteIdentifierImpl(null, rpc.getType().getLastComponent(), rpc.getContextReference());
  76         final RpcRegistry.Messages.FindRouters findMsg = new RpcRegistry.Messages.FindRouters(routeId);
  77         return (Future) ask(rpcRegistry, findMsg, config.getAskDuration());
  78     }
  79 }