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 com.google.common.base.Function;
  11 import com.google.common.collect.Collections2;
  12 import com.google.common.util.concurrent.CheckedFuture;
  13 import com.google.common.util.concurrent.Futures;
  14 import com.google.common.util.concurrent.ListenableFuture;
  15 import java.util.Collection;
  16 import javax.annotation.Nonnull;
  17 import javax.annotation.Nullable;
  18 import org.opendaylight.controller.md.sal.dom.api.DOMRpcAvailabilityListener;
  19 import org.opendaylight.controller.md.sal.dom.api.DOMRpcException;
  20 import org.opendaylight.controller.md.sal.dom.api.DOMRpcIdentifier;
  21 import org.opendaylight.controller.md.sal.dom.api.DOMRpcImplementationNotAvailableException;
  22 import org.opendaylight.controller.md.sal.dom.api.DOMRpcResult;
  23 import org.opendaylight.controller.md.sal.dom.api.DOMRpcService;
  24 import org.opendaylight.controller.md.sal.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.yang.common.RpcResult;
  30 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  31 import org.opendaylight.yangtools.yang.model.api.RpcDefinition;
  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
  40     private static final Function<RpcDefinition, DOMRpcIdentifier> RPC_TO_RPC_IDENTIFIER =
  41         new Function<RpcDefinition, DOMRpcIdentifier>() {
  42             @Override
  43             public DOMRpcIdentifier apply(final RpcDefinition input) {
  44                 return DOMRpcIdentifier.create(input.getPath());
  45             }
  46         };
  47
  48     private final RemoteDeviceCommunicator<NetconfMessage> listener;
  49     private final MessageTransformer<NetconfMessage> transformer;
  50     private final Collection<DOMRpcIdentifier> availableRpcs;
  51
  52     public NetconfDeviceRpc(final SchemaContext schemaContext, final RemoteDeviceCommunicator<NetconfMessage> listener,
  53                             final MessageTransformer<NetconfMessage> transformer) {
  54         this.listener = listener;
  55         this.transformer = transformer;
  56
  57         availableRpcs = Collections2.transform(schemaContext.getOperations(), RPC_TO_RPC_IDENTIFIER);
  58     }
  59
  60     @Nonnull
  61     @Override
  62     public CheckedFuture<DOMRpcResult, DOMRpcException> invokeRpc(@Nonnull final SchemaPath type,
  63                                                                   @Nullable final NormalizedNode<?, ?> input) {
  64         final NetconfMessage message = transformer.toRpcRequest(type, input);
  65         final ListenableFuture<RpcResult<NetconfMessage>> delegateFutureWithPureResult =
  66                 listener.sendRequest(message, type.getLastComponent());
  67
  68         final ListenableFuture<DOMRpcResult> transformed =
  69             Futures.transform(delegateFutureWithPureResult, new Function<RpcResult<NetconfMessage>, DOMRpcResult>() {
  70                 @Override
  71                 public DOMRpcResult apply(final RpcResult<NetconfMessage> input) {
  72                     if (input.isSuccessful()) {
  73                         return transformer.toRpcResult(input.getResult(), type);
  74                     } else {
  75                         return new DefaultDOMRpcResult(input.getErrors());
  76                     }
  77                 }
  78             });
  79
  80         return Futures.makeChecked(transformed, new Function<Exception, DOMRpcException>() {
  81             @Nullable
  82             @Override
  83             public DOMRpcException apply(@Nullable final Exception exception) {
  84                 return new DOMRpcImplementationNotAvailableException(exception, "Unable to invoke rpc %s", type);
  85             }
  86         });
  87     }
  88
  89     @Nonnull
  90     @Override
  91     public <T extends DOMRpcAvailabilityListener> ListenerRegistration<T> registerRpcListener(
  92             @Nonnull final T listener) {
  93
  94         listener.onRpcAvailable(availableRpcs);
  95
  96         return new ListenerRegistration<T>() {
  97             @Override
  98             public void close() {
  99                 // NOOP, no rpcs appear and disappear in this implementation
 100             }
 101
 102             @Override
 103             public T getInstance() {
 104                 return listener;
 105             }
 106         };
 107     }
 108 }