netconf/sal-netconf-connector/src/main/java/org/opendaylight/netconf/sal/connect/netconf/sal/NetconfDeviceRpc.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.netconf.sal.connect.netconf.sal;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.collect.Collections2;
  13 import com.google.common.util.concurrent.FutureCallback;
  14 import com.google.common.util.concurrent.Futures;
  15 import com.google.common.util.concurrent.ListenableFuture;
  16 import com.google.common.util.concurrent.MoreExecutors;
  17 import com.google.common.util.concurrent.SettableFuture;
  18 import org.opendaylight.mdsal.dom.api.DOMRpcAvailabilityListener;
  19 import org.opendaylight.mdsal.dom.api.DOMRpcIdentifier;
  20 import org.opendaylight.mdsal.dom.api.DOMRpcImplementationNotAvailableException;
  21 import org.opendaylight.mdsal.dom.api.DOMRpcResult;
  22 import org.opendaylight.mdsal.dom.api.DOMRpcService;
  23 import org.opendaylight.mdsal.dom.spi.DefaultDOMRpcResult;
  24 import org.opendaylight.netconf.api.NetconfMessage;
  25 import org.opendaylight.netconf.sal.connect.api.MessageTransformer;
  26 import org.opendaylight.netconf.sal.connect.api.RemoteDeviceCommunicator;
  27 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  28 import org.opendaylight.yangtools.concepts.NoOpListenerRegistration;
  29 import org.opendaylight.yangtools.yang.common.RpcResult;
  30 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  31 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  32 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  33
  34 /**
  35  * Invokes RPC by sending netconf message via listener. Also transforms result from NetconfMessage to CompositeNode.
  36  */
  37 public final class NetconfDeviceRpc implements DOMRpcService {
  38     private final RemoteDeviceCommunicator<NetconfMessage> communicator;
  39     private final MessageTransformer<NetconfMessage> transformer;
  40     private final SchemaContext schemaContext;
  41
  42     public NetconfDeviceRpc(final SchemaContext schemaContext,
  43             final RemoteDeviceCommunicator<NetconfMessage> communicator,
  44             final MessageTransformer<NetconfMessage> transformer) {
  45         this.communicator = communicator;
  46         this.transformer = transformer;
  47         this.schemaContext = requireNonNull(schemaContext);
  48     }
  49
  50     @Override
  51     public ListenableFuture<DOMRpcResult> invokeRpc(final SchemaPath type, final NormalizedNode<?, ?> input) {
  52         final ListenableFuture<RpcResult<NetconfMessage>> delegateFuture = communicator.sendRequest(
  53             transformer.toRpcRequest(type, input), type.getLastComponent());
  54
  55         final SettableFuture<DOMRpcResult> ret = SettableFuture.create();
  56         Futures.addCallback(delegateFuture, new FutureCallback<RpcResult<NetconfMessage>>() {
  57             @Override
  58             public void onSuccess(final RpcResult<NetconfMessage> result) {
  59                 ret.set(result.isSuccessful() ? transformer.toRpcResult(result.getResult(), type)
  60                         : new DefaultDOMRpcResult(result.getErrors()));
  61             }
  62
  63             @Override
  64             public void onFailure(final Throwable cause) {
  65                 ret.setException(new DOMRpcImplementationNotAvailableException(cause, "Unable to invoke rpc %s", type));
  66             }
  67
  68         }, MoreExecutors.directExecutor());
  69         return ret;
  70     }
  71
  72     @Override
  73     public <T extends DOMRpcAvailabilityListener> ListenerRegistration<T> registerRpcListener(final T listener) {
  74         listener.onRpcAvailable(Collections2.transform(schemaContext.getOperations(),
  75             input -> DOMRpcIdentifier.create(input.getPath())));
  76
  77         // NOOP, no rpcs appear and disappear in this implementation
  78         return NoOpListenerRegistration.of(listener);
  79     }
  80 }