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