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 = new Function<RpcDefinition, DOMRpcIdentifier>() {
  41         @Override
  42         public DOMRpcIdentifier apply(final RpcDefinition input) {
  43             return DOMRpcIdentifier.create(input.getPath());
  44         }
  45     };
  46
  47     private final RemoteDeviceCommunicator<NetconfMessage> listener;
  48     private final MessageTransformer<NetconfMessage> transformer;
  49     private final Collection<DOMRpcIdentifier> availableRpcs;
  50
  51     public NetconfDeviceRpc(final SchemaContext schemaContext, final RemoteDeviceCommunicator<NetconfMessage> listener, final MessageTransformer<NetconfMessage> transformer) {
  52         this.listener = listener;
  53         this.transformer = transformer;
  54
  55         availableRpcs = Collections2.transform(schemaContext.getOperations(), RPC_TO_RPC_IDENTIFIER);
  56     }
  57
  58     @Nonnull
  59     @Override
  60     public CheckedFuture<DOMRpcResult, DOMRpcException> invokeRpc(@Nonnull final SchemaPath type, @Nullable final NormalizedNode<?, ?> input) {
  61         final NetconfMessage message = transformer.toRpcRequest(type, input);
  62         final ListenableFuture<RpcResult<NetconfMessage>> delegateFutureWithPureResult = listener.sendRequest(message, type.getLastComponent());
  63
  64         final ListenableFuture<DOMRpcResult> transformed = Futures.transform(delegateFutureWithPureResult, new Function<RpcResult<NetconfMessage>, DOMRpcResult>() {
  65             @Override
  66             public DOMRpcResult apply(final RpcResult<NetconfMessage> input) {
  67                 if (input.isSuccessful()) {
  68                     return transformer.toRpcResult(input.getResult(), type);
  69                 } else {
  70                     // TODO check whether the listener sets errors properly
  71                     return new DefaultDOMRpcResult(input.getErrors());
  72                 }
  73             }
  74         });
  75
  76         return Futures.makeChecked(transformed, new Function<Exception, DOMRpcException>() {
  77             @Nullable
  78             @Override
  79             public DOMRpcException apply(@Nullable final Exception e) {
  80                 // FIXME what other possible exceptions are there ?
  81                 return new DOMRpcImplementationNotAvailableException(e, "Unable to invoke rpc %s", type);
  82             }
  83         });
  84     }
  85
  86     @Nonnull
  87     @Override
  88     public <T extends DOMRpcAvailabilityListener> ListenerRegistration<T> registerRpcListener(@Nonnull final T listener) {
  89
  90         listener.onRpcAvailable(availableRpcs);
  91
  92         return new ListenerRegistration<T>() {
  93             @Override
  94             public void close() {
  95                 // NOOP, no rpcs appear and disappear in this implementation
  96             }
  97
  98             @Override
  99             public T getInstance() {
 100                 return listener;
 101             }
 102         };
 103     }
 104 }