git.opendaylight Code Review - mdsal.git/blob

   1 /*
   2  * Copyright (c) 2015 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
   9 package org.opendaylight.mdsal.binding.dom.adapter;
  10
  11 import com.google.common.base.Function;
  12 import com.google.common.base.Preconditions;
  13 import com.google.common.collect.ImmutableMap;
  14 import com.google.common.util.concurrent.CheckedFuture;
  15 import com.google.common.util.concurrent.Futures;
  16 import com.google.common.util.concurrent.ListenableFuture;
  17 import java.lang.reflect.InvocationHandler;
  18 import java.lang.reflect.Method;
  19 import java.lang.reflect.Proxy;
  20 import java.util.Map.Entry;
  21 import org.opendaylight.mdsal.dom.api.DOMRpcException;
  22 import org.opendaylight.mdsal.dom.api.DOMRpcResult;
  23 import org.opendaylight.mdsal.dom.api.DOMRpcService;
  24 import org.opendaylight.mdsal.dom.spi.RpcRoutingStrategy;
  25 import org.opendaylight.yangtools.binding.data.codec.impl.BindingNormalizedNodeCodecRegistry;
  26 import org.opendaylight.yangtools.yang.binding.DataContainer;
  27 import org.opendaylight.yangtools.yang.binding.DataObject;
  28 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  29 import org.opendaylight.yangtools.yang.binding.RpcService;
  30 import org.opendaylight.yangtools.yang.binding.util.BindingReflections;
  31 import org.opendaylight.yangtools.yang.common.QName;
  32 import org.opendaylight.yangtools.yang.common.RpcResult;
  33 import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
  34 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  35 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
  36 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  37 import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
  38 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  39 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
  40 import org.opendaylight.yangtools.yang.model.api.RpcDefinition;
  41 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  42
  43 class RpcServiceAdapter implements InvocationHandler {
  44
  45     private final ImmutableMap<Method, RpcInvocationStrategy> rpcNames;
  46     private final Class<? extends RpcService> type;
  47     private final BindingToNormalizedNodeCodec codec;
  48     private final DOMRpcService delegate;
  49     private final RpcService proxy;
  50
  51     RpcServiceAdapter(final Class<? extends RpcService> type, final BindingToNormalizedNodeCodec codec,
  52             final DOMRpcService domService) {
  53         this.type = Preconditions.checkNotNull(type);
  54         this.codec = Preconditions.checkNotNull(codec);
  55         this.delegate = Preconditions.checkNotNull(domService);
  56         final ImmutableMap.Builder<Method, RpcInvocationStrategy> rpcBuilder = ImmutableMap.builder();
  57         for (final Entry<Method, RpcDefinition> rpc : codec.getRpcMethodToSchema(type).entrySet()) {
  58             rpcBuilder.put(rpc.getKey(), createStrategy(rpc.getKey(), rpc.getValue()));
  59         }
  60         rpcNames = rpcBuilder.build();
  61         proxy = (RpcService) Proxy.newProxyInstance(type.getClassLoader(), new Class[] {type}, this);
  62     }
  63
  64     private ListenableFuture<RpcResult<?>> invoke0(final SchemaPath schemaPath, final NormalizedNode<?, ?> input) {
  65         final CheckedFuture<DOMRpcResult, DOMRpcException> result = delegate.invokeRpc(schemaPath, input);
  66         if (result instanceof LazyDOMRpcResultFuture) {
  67             return ((LazyDOMRpcResultFuture) result).getBindingFuture();
  68         }
  69
  70         return transformFuture(schemaPath, result, codec.getCodecFactory());
  71     }
  72
  73     private RpcInvocationStrategy createStrategy(final Method method, final RpcDefinition schema) {
  74         final RpcRoutingStrategy strategy = RpcRoutingStrategy.from(schema);
  75         if (strategy.isContextBasedRouted()) {
  76             return new RoutedStrategy(schema.getPath(), method, strategy.getLeaf());
  77         }
  78         return new NonRoutedStrategy(schema.getPath());
  79     }
  80
  81     RpcService getProxy() {
  82         return proxy;
  83     }
  84
  85     @Override
  86     public Object invoke(final Object proxy, final Method method, final Object[] args) throws Throwable {
  87
  88         final RpcInvocationStrategy rpc = rpcNames.get(method);
  89         if (rpc != null) {
  90             if (method.getParameterTypes().length == 0) {
  91                 return rpc.invokeEmpty();
  92             }
  93             if (args.length != 1) {
  94                 throw new IllegalArgumentException("Input must be provided.");
  95             }
  96             return rpc.invoke((DataObject) args[0]);
  97         }
  98
  99         if (isObjectMethod(method)) {
 100             return callObjectMethod(proxy, method, args);
 101         }
 102         throw new UnsupportedOperationException("Method " + method.toString() + "is unsupported.");
 103     }
 104
 105     private static boolean isObjectMethod(final Method method) {
 106         switch (method.getName()) {
 107             case "toString":
 108                 return (method.getReturnType().equals(String.class) && method.getParameterTypes().length == 0);
 109             case "hashCode":
 110                 return (method.getReturnType().equals(int.class) && method.getParameterTypes().length == 0);
 111             case "equals":
 112                 return (method.getReturnType().equals(boolean.class) && method.getParameterTypes().length == 1 && method
 113                         .getParameterTypes()[0] == Object.class);
 114             default:
 115                 return false;
 116         }
 117     }
 118
 119     private Object callObjectMethod(final Object self, final Method method, final Object[] args) {
 120         switch (method.getName()) {
 121             case "toString":
 122                 return type.getName() + "$Adapter{delegate=" + delegate.toString() + "}";
 123             case "hashCode":
 124                 return System.identityHashCode(self);
 125             case "equals":
 126                 return (self == args[0]);
 127             default:
 128                 return null;
 129         }
 130     }
 131
 132     private static ListenableFuture<RpcResult<?>> transformFuture(final SchemaPath rpc,
 133             final ListenableFuture<DOMRpcResult> domFuture, final BindingNormalizedNodeCodecRegistry codec) {
 134         return Futures.transform(domFuture, new Function<DOMRpcResult, RpcResult<?>>() {
 135             @Override
 136             public RpcResult<?> apply(final DOMRpcResult input) {
 137                 final NormalizedNode<?, ?> domData = input.getResult();
 138                 final DataObject bindingResult;
 139                 if (domData != null) {
 140                     final SchemaPath rpcOutput = rpc.createChild(QName.create(rpc.getLastComponent(), "output"));
 141                     bindingResult = codec.fromNormalizedNodeRpcData(rpcOutput, (ContainerNode) domData);
 142                 } else {
 143                     bindingResult = null;
 144                 }
 145                 return RpcResult.class.cast(RpcResultBuilder.success(bindingResult).build());
 146             }
 147         });
 148     }
 149
 150     private abstract class RpcInvocationStrategy {
 151
 152         private final SchemaPath rpcName;
 153
 154         protected RpcInvocationStrategy(final SchemaPath path) {
 155             rpcName = path;
 156         }
 157
 158         final ListenableFuture<RpcResult<?>> invoke(final DataObject input) {
 159             return invoke0(rpcName, serialize(input));
 160         }
 161
 162         abstract NormalizedNode<?, ?> serialize(DataObject input);
 163
 164         final ListenableFuture<RpcResult<?>> invokeEmpty() {
 165             return invoke0(rpcName, null);
 166         }
 167
 168         final SchemaPath getRpcName() {
 169             return rpcName;
 170         }
 171
 172     }
 173
 174     private final class NonRoutedStrategy extends RpcInvocationStrategy {
 175
 176         protected NonRoutedStrategy(final SchemaPath path) {
 177             super(path);
 178         }
 179
 180         @Override
 181         NormalizedNode<?, ?> serialize(final DataObject input) {
 182             return LazySerializedContainerNode.create(getRpcName(), input, codec.getCodecRegistry());
 183         }
 184
 185     }
 186
 187     private final class RoutedStrategy extends RpcInvocationStrategy {
 188
 189         private final ContextReferenceExtractor refExtractor;
 190         private final NodeIdentifier contextName;
 191
 192         protected RoutedStrategy(final SchemaPath path, final Method rpcMethod, final QName leafName) {
 193             super(path);
 194             final Class<? extends DataContainer> inputType = BindingReflections.resolveRpcInputClass(rpcMethod).get();
 195             refExtractor = ContextReferenceExtractor.from(inputType);
 196             this.contextName = new NodeIdentifier(leafName);
 197         }
 198
 199         @Override
 200         NormalizedNode<?, ?> serialize(final DataObject input) {
 201             final InstanceIdentifier<?> bindingII = refExtractor.extract(input);
 202             if (bindingII != null) {
 203                 final YangInstanceIdentifier yangII = codec.toYangInstanceIdentifierCached(bindingII);
 204                 final LeafNode<?> contextRef = ImmutableNodes.leafNode(contextName, yangII);
 205                 return LazySerializedContainerNode.withContextRef(getRpcName(), input, contextRef,
 206                         codec.getCodecRegistry());
 207             }
 208             return LazySerializedContainerNode.create(getRpcName(), input, codec.getCodecRegistry());
 209         }
 210
 211     }
 212 }