2 * Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
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
9 package org.opendaylight.mdsal.binding.dom.adapter;
11 import com.google.common.base.Function;
12 import com.google.common.base.Optional;
13 import com.google.common.base.Preconditions;
14 import com.google.common.collect.ImmutableMap;
15 import com.google.common.util.concurrent.Futures;
16 import com.google.common.util.concurrent.ListenableFuture;
17 import com.google.common.util.concurrent.MoreExecutors;
18 import java.lang.reflect.InvocationHandler;
19 import java.lang.reflect.Method;
20 import java.lang.reflect.Proxy;
21 import java.util.Collection;
22 import java.util.Map.Entry;
23 import org.opendaylight.mdsal.binding.dom.codec.impl.BindingNormalizedNodeCodecRegistry;
24 import org.opendaylight.mdsal.dom.api.DOMRpcResult;
25 import org.opendaylight.mdsal.dom.api.DOMRpcService;
26 import org.opendaylight.mdsal.dom.spi.RpcRoutingStrategy;
27 import org.opendaylight.yangtools.yang.binding.DataContainer;
28 import org.opendaylight.yangtools.yang.binding.DataObject;
29 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
30 import org.opendaylight.yangtools.yang.binding.RpcService;
31 import org.opendaylight.yangtools.yang.binding.util.BindingReflections;
32 import org.opendaylight.yangtools.yang.common.QName;
33 import org.opendaylight.yangtools.yang.common.RpcError;
34 import org.opendaylight.yangtools.yang.common.RpcError.ErrorSeverity;
35 import org.opendaylight.yangtools.yang.common.RpcResult;
36 import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
37 import org.opendaylight.yangtools.yang.common.YangConstants;
38 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
39 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
40 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
41 import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
42 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
43 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
44 import org.opendaylight.yangtools.yang.model.api.RpcDefinition;
45 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
47 class RpcServiceAdapter implements InvocationHandler {
48 private final ImmutableMap<Method, RpcInvocationStrategy> rpcNames;
49 private final Class<? extends RpcService> type;
50 private final BindingToNormalizedNodeCodec codec;
51 private final DOMRpcService delegate;
52 private final RpcService proxy;
54 RpcServiceAdapter(final Class<? extends RpcService> type, final BindingToNormalizedNodeCodec codec,
55 final DOMRpcService domService) {
56 this.type = Preconditions.checkNotNull(type);
57 this.codec = Preconditions.checkNotNull(codec);
58 this.delegate = Preconditions.checkNotNull(domService);
59 final ImmutableMap.Builder<Method, RpcInvocationStrategy> rpcBuilder = ImmutableMap.builder();
60 for (final Entry<Method, RpcDefinition> rpc : codec.getRpcMethodToSchema(type).entrySet()) {
61 rpcBuilder.put(rpc.getKey(), createStrategy(rpc.getKey(), rpc.getValue()));
63 rpcNames = rpcBuilder.build();
64 proxy = (RpcService) Proxy.newProxyInstance(type.getClassLoader(), new Class[] {type}, this);
67 private RpcInvocationStrategy createStrategy(final Method method, final RpcDefinition schema) {
68 final RpcRoutingStrategy strategy = RpcRoutingStrategy.from(schema);
69 if (strategy.isContextBasedRouted()) {
70 return new RoutedStrategy(schema.getPath(), method, strategy.getLeaf());
72 return new NonRoutedStrategy(schema.getPath());
75 RpcService getProxy() {
80 @SuppressWarnings("checkstyle:hiddenField")
81 public Object invoke(final Object proxy, final Method method, final Object[] args) throws Throwable {
83 final RpcInvocationStrategy rpc = rpcNames.get(method);
85 if (method.getParameterTypes().length == 0) {
86 return rpc.invokeEmpty();
88 if (args.length != 1) {
89 throw new IllegalArgumentException("Input must be provided.");
91 return rpc.invoke((DataObject) args[0]);
94 if (isObjectMethod(method)) {
95 return callObjectMethod(proxy, method, args);
97 throw new UnsupportedOperationException("Method " + method.toString() + "is unsupported.");
100 private static boolean isObjectMethod(final Method method) {
101 switch (method.getName()) {
103 return method.getReturnType().equals(String.class) && method.getParameterTypes().length == 0;
105 return method.getReturnType().equals(int.class) && method.getParameterTypes().length == 0;
107 return method.getReturnType().equals(boolean.class) && method.getParameterTypes().length == 1
108 && method.getParameterTypes()[0] == Object.class;
114 private Object callObjectMethod(final Object self, final Method method, final Object[] args) {
115 switch (method.getName()) {
117 return type.getName() + "$Adapter{delegate=" + delegate.toString() + "}";
119 return System.identityHashCode(self);
121 return self == args[0];
127 private abstract class RpcInvocationStrategy {
129 private final SchemaPath rpcName;
131 protected RpcInvocationStrategy(final SchemaPath path) {
135 final ListenableFuture<RpcResult<?>> invoke(final DataObject input) {
136 return invoke0(rpcName, serialize(input));
139 abstract NormalizedNode<?, ?> serialize(DataObject input);
141 final ListenableFuture<RpcResult<?>> invokeEmpty() {
142 return invoke0(rpcName, null);
145 final SchemaPath getRpcName() {
149 ListenableFuture<RpcResult<?>> invoke0(final SchemaPath schemaPath, final NormalizedNode<?, ?> input) {
150 final ListenableFuture<DOMRpcResult> result = delegate.invokeRpc(schemaPath, input);
151 if (result instanceof LazyDOMRpcResultFuture) {
152 return ((LazyDOMRpcResultFuture) result).getBindingFuture();
155 return transformFuture(schemaPath, result, codec.getCodecFactory());
158 private ListenableFuture<RpcResult<?>> transformFuture(final SchemaPath rpc,
159 final ListenableFuture<DOMRpcResult> domFuture, final BindingNormalizedNodeCodecRegistry resultCodec) {
160 return Futures.transform(domFuture, (Function<DOMRpcResult, RpcResult<?>>) input -> {
161 final NormalizedNode<?, ?> domData = input.getResult();
162 final DataObject bindingResult;
163 if (domData != null) {
164 final SchemaPath rpcOutput = rpc.createChild(YangConstants.operationOutputQName(
165 rpc.getLastComponent().getModule()));
166 bindingResult = resultCodec.fromNormalizedNodeRpcData(rpcOutput, (ContainerNode) domData);
168 bindingResult = null;
171 // DOMRpcResult does not have a notion of success, hence we have to reverse-engineer it by looking
172 // at reported errors and checking whether they are just warnings.
173 final Collection<RpcError> errors = input.getErrors();
174 return RpcResult.class.cast(RpcResultBuilder.status(errors.stream()
175 .noneMatch(error -> error.getSeverity() == ErrorSeverity.ERROR))
176 .withResult(bindingResult).withRpcErrors(errors).build());
177 }, MoreExecutors.directExecutor());
181 private final class NonRoutedStrategy extends RpcInvocationStrategy {
183 protected NonRoutedStrategy(final SchemaPath path) {
188 NormalizedNode<?, ?> serialize(final DataObject input) {
189 return LazySerializedContainerNode.create(getRpcName(), input, codec.getCodecRegistry());
194 private final class RoutedStrategy extends RpcInvocationStrategy {
196 private final ContextReferenceExtractor refExtractor;
197 private final NodeIdentifier contextName;
199 protected RoutedStrategy(final SchemaPath path, final Method rpcMethod, final QName leafName) {
201 final Optional<Class<? extends DataContainer>> maybeInputType =
202 BindingReflections.resolveRpcInputClass(rpcMethod);
203 Preconditions.checkState(maybeInputType.isPresent(), "RPC method %s has no input", rpcMethod.getName());
204 final Class<? extends DataContainer> inputType = maybeInputType.get();
205 refExtractor = ContextReferenceExtractor.from(inputType);
206 this.contextName = new NodeIdentifier(leafName);
210 NormalizedNode<?, ?> serialize(final DataObject input) {
211 final InstanceIdentifier<?> bindingII = refExtractor.extract(input);
212 if (bindingII != null) {
213 final YangInstanceIdentifier yangII = codec.toYangInstanceIdentifierCached(bindingII);
214 final LeafNode<?> contextRef = ImmutableNodes.leafNode(contextName, yangII);
215 return LazySerializedContainerNode.withContextRef(getRpcName(), input, contextRef,
216 codec.getCodecRegistry());
218 return LazySerializedContainerNode.create(getRpcName(), input, codec.getCodecRegistry());