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

   1 /*
   2  * Copyright (c) 2015 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;
   9
  10 import akka.dispatch.OnComplete;
  11 import com.google.common.base.Throwables;
  12 import com.google.common.util.concurrent.AbstractFuture;
  13 import com.google.common.util.concurrent.CheckedFuture;
  14 import java.util.concurrent.ExecutionException;
  15 import java.util.concurrent.TimeUnit;
  16 import java.util.concurrent.TimeoutException;
  17 import org.opendaylight.controller.cluster.datastore.node.utils.serialization.NormalizedNodeSerializer;
  18 import org.opendaylight.controller.md.sal.dom.api.DOMRpcException;
  19 import org.opendaylight.controller.md.sal.dom.api.DOMRpcResult;
  20 import org.opendaylight.controller.md.sal.dom.spi.DefaultDOMRpcResult;
  21 import org.opendaylight.controller.remote.rpc.messages.RpcResponse;
  22 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  23 import org.slf4j.Logger;
  24 import org.slf4j.LoggerFactory;
  25 import scala.concurrent.ExecutionContext;
  26 import scala.concurrent.Future;
  27
  28 class RemoteDOMRpcFuture extends AbstractFuture<DOMRpcResult> implements CheckedFuture<DOMRpcResult, DOMRpcException> {
  29
  30     private static final Logger LOG = LoggerFactory.getLogger(RemoteDOMRpcFuture.class);
  31
  32     private RemoteDOMRpcFuture(final Future<Object> future) {
  33         future.onComplete(new FutureUpdater(), ExecutionContext.Implicits$.MODULE$.global());
  34     }
  35
  36     public static CheckedFuture<DOMRpcResult, DOMRpcException> from(final Future<Object> future) {
  37         return new RemoteDOMRpcFuture(future);
  38     }
  39
  40     @Override
  41     public DOMRpcResult checkedGet() throws DOMRpcException {
  42         try {
  43             return get();
  44         } catch (final ExecutionException e) {
  45             throw mapException(e);
  46         } catch (final InterruptedException e) {
  47             throw Throwables.propagate(e);
  48         }
  49     }
  50
  51     @Override
  52     public DOMRpcResult checkedGet(final long timeout, final TimeUnit unit) throws TimeoutException, DOMRpcException {
  53         try {
  54             return get(timeout, unit);
  55         } catch (final ExecutionException e) {
  56             throw mapException(e);
  57         } catch (final InterruptedException e) {
  58             throw Throwables.propagate(e);
  59         }
  60     }
  61
  62     private DOMRpcException mapException(final ExecutionException e) {
  63         final Throwable cause = e.getCause();
  64         if (cause instanceof DOMRpcException) {
  65             return (DOMRpcException) cause;
  66         }
  67         return new RemoteDOMRpcException("Exception during invoking RPC", e);
  68     }
  69
  70     private final class FutureUpdater extends OnComplete<Object> {
  71
  72         @Override
  73         public void onComplete(final Throwable error, final Object reply) throws Throwable {
  74             if (error != null) {
  75                 RemoteDOMRpcFuture.this.setException(error);
  76             } else if (reply instanceof RpcResponse) {
  77                 final RpcResponse rpcReply = (RpcResponse) reply;
  78                 final NormalizedNode<?, ?> result;
  79                 if (rpcReply.getResultNormalizedNode() == null) {
  80                     result = null;
  81                     LOG.debug("Received response for invoke rpc: result is null");
  82                 } else {
  83                     result = NormalizedNodeSerializer.deSerialize(rpcReply.getResultNormalizedNode());
  84                     LOG.debug("Received response for invoke rpc: result is {}", result);
  85                 }
  86                 RemoteDOMRpcFuture.this.set(new DefaultDOMRpcResult(result));
  87             }
  88             RemoteDOMRpcFuture.this.setException(new IllegalStateException("Incorrect reply type " + reply
  89                     + "from Akka"));
  90         }
  91     }
  92
  93 }