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.api.DefaultDOMRpcException;
  24 import org.opendaylight.mdsal.dom.spi.DefaultDOMRpcResult;
  25 import org.opendaylight.netconf.api.NetconfMessage;
  26 import org.opendaylight.netconf.sal.connect.api.MessageTransformer;
  27 import org.opendaylight.netconf.sal.connect.api.RemoteDeviceCommunicator;
  28 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  29 import org.opendaylight.yangtools.concepts.NoOpListenerRegistration;
  30 import org.opendaylight.yangtools.yang.common.RpcResult;
  31 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  32 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  33 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  34
  35 /**
  36  * Invokes RPC by sending netconf message via listener. Also transforms result from NetconfMessage to CompositeNode.
  37  */
  38 public final class NetconfDeviceRpc implements DOMRpcService {
  39     private final RemoteDeviceCommunicator<NetconfMessage> communicator;
  40     private final MessageTransformer<NetconfMessage> transformer;
  41     private final SchemaContext schemaContext;
  42
  43     public NetconfDeviceRpc(final SchemaContext schemaContext,
  44             final RemoteDeviceCommunicator<NetconfMessage> communicator,
  45             final MessageTransformer<NetconfMessage> transformer) {
  46         this.communicator = communicator;
  47         this.transformer = transformer;
  48         this.schemaContext = requireNonNull(schemaContext);
  49     }
  50
  51     @Override
  52     @SuppressWarnings("checkstyle:IllegalCatch")
  53     public ListenableFuture<DOMRpcResult> invokeRpc(final SchemaPath type, final NormalizedNode<?, ?> input) {
  54         final ListenableFuture<RpcResult<NetconfMessage>> delegateFuture = communicator.sendRequest(
  55             transformer.toRpcRequest(type, input), type.getLastComponent());
  56
  57         final SettableFuture<DOMRpcResult> ret = SettableFuture.create();
  58         Futures.addCallback(delegateFuture, new FutureCallback<RpcResult<NetconfMessage>>() {
  59             @Override
  60             public void onSuccess(final RpcResult<NetconfMessage> result) {
  61                 try {
  62                     ret.set(result.isSuccessful() ? transformer.toRpcResult(result.getResult(), type)
  63                             : new DefaultDOMRpcResult(result.getErrors()));
  64                 } catch (Exception cause) {
  65                     ret.setException(new DefaultDOMRpcException(
  66                             "Unable to parse rpc reply. type: " + type + " input: " + input, cause));
  67                 }
  68             }
  69
  70             @Override
  71             public void onFailure(final Throwable cause) {
  72                 ret.setException(new DOMRpcImplementationNotAvailableException(cause, "Unable to invoke rpc %s", type));
  73             }
  74
  75         }, MoreExecutors.directExecutor());
  76         return ret;
  77     }
  78
  79     @Override
  80     public <T extends DOMRpcAvailabilityListener> ListenerRegistration<T> registerRpcListener(final T listener) {
  81         listener.onRpcAvailable(Collections2.transform(schemaContext.getOperations(),
  82             input -> DOMRpcIdentifier.create(input.getPath())));
  83
  84         // NOOP, no rpcs appear and disappear in this implementation
  85         return NoOpListenerRegistration.of(listener);
  86     }
  87 }