binding/mdsal-binding-dom-adapter/src/main/java/org/opendaylight/mdsal/binding/dom/adapter/BindingDOMRpcImplementationAdapter.java

   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 package org.opendaylight.mdsal.binding.dom.adapter;
   9
  10 import com.google.common.base.Preconditions;
  11 import com.google.common.cache.Cache;
  12 import com.google.common.cache.CacheBuilder;
  13 import com.google.common.util.concurrent.FluentFuture;
  14 import com.google.common.util.concurrent.ListenableFuture;
  15 import java.lang.reflect.Method;
  16 import java.util.HashMap;
  17 import java.util.Map;
  18 import java.util.Map.Entry;
  19 import java.util.concurrent.ExecutionException;
  20 import javax.annotation.Nonnull;
  21 import org.opendaylight.mdsal.binding.dom.adapter.invoke.RpcServiceInvoker;
  22 import org.opendaylight.mdsal.binding.dom.codec.impl.BindingNormalizedNodeCodecRegistry;
  23 import org.opendaylight.mdsal.binding.spec.reflect.BindingReflections;
  24 import org.opendaylight.mdsal.dom.api.DOMRpcIdentifier;
  25 import org.opendaylight.mdsal.dom.api.DOMRpcImplementation;
  26 import org.opendaylight.mdsal.dom.api.DOMRpcResult;
  27 import org.opendaylight.yangtools.yang.binding.DataObject;
  28 import org.opendaylight.yangtools.yang.binding.RpcService;
  29 import org.opendaylight.yangtools.yang.common.QName;
  30 import org.opendaylight.yangtools.yang.common.RpcResult;
  31 import org.opendaylight.yangtools.yang.common.YangConstants;
  32 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  33 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  34 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  35
  36 public class BindingDOMRpcImplementationAdapter implements DOMRpcImplementation {
  37
  38     private static final Cache<Class<?>, RpcServiceInvoker> SERVICE_INVOKERS
  39             = CacheBuilder.newBuilder().weakKeys().build();
  40     // Default implementations are 0, we need to perform some translation, hence we have a slightly higher cost
  41     private static final int COST = 1;
  42
  43     private final BindingNormalizedNodeCodecRegistry codec;
  44     private final RpcServiceInvoker invoker;
  45     private final RpcService delegate;
  46     private final QName inputQname;
  47
  48     <T extends RpcService> BindingDOMRpcImplementationAdapter(final BindingNormalizedNodeCodecRegistry codec,
  49             final Class<T> type, final Map<SchemaPath, Method> localNameToMethod, final T delegate) {
  50         try {
  51             this.invoker = SERVICE_INVOKERS.get(type, () -> {
  52                 final Map<QName, Method> map = new HashMap<>();
  53                 for (Entry<SchemaPath, Method> e : localNameToMethod.entrySet()) {
  54                     map.put(e.getKey().getLastComponent(), e.getValue());
  55                 }
  56
  57                 return RpcServiceInvoker.from(map);
  58             });
  59         } catch (ExecutionException e) {
  60             throw new IllegalArgumentException("Failed to create invokers for type " + type, e);
  61         }
  62
  63         this.codec = Preconditions.checkNotNull(codec);
  64         this.delegate = Preconditions.checkNotNull(delegate);
  65         inputQname = YangConstants.operationInputQName(BindingReflections.getQNameModule(type)).intern();
  66     }
  67
  68     @Nonnull
  69     @Override
  70     public FluentFuture<DOMRpcResult> invokeRpc(@Nonnull final DOMRpcIdentifier rpc, final NormalizedNode<?, ?> input) {
  71
  72         final SchemaPath schemaPath = rpc.getType();
  73         final DataObject bindingInput = input != null ? deserialize(rpc.getType(), input) : null;
  74         final ListenableFuture<RpcResult<?>> bindingResult = invoke(schemaPath, bindingInput);
  75         return transformResult(bindingResult);
  76     }
  77
  78     @Override
  79     public long invocationCost() {
  80         return COST;
  81     }
  82
  83     private DataObject deserialize(final SchemaPath rpcPath, final NormalizedNode<?, ?> input) {
  84         if (input instanceof BindingDataAware) {
  85             return ((BindingDataAware) input).bindingData();
  86         }
  87         final SchemaPath inputSchemaPath = rpcPath.createChild(inputQname);
  88         return codec.fromNormalizedNodeRpcData(inputSchemaPath, (ContainerNode) input);
  89     }
  90
  91     private ListenableFuture<RpcResult<?>> invoke(final SchemaPath schemaPath, final DataObject input) {
  92         return invoker.invokeRpc(delegate, schemaPath.getLastComponent(), input);
  93     }
  94
  95     private FluentFuture<DOMRpcResult> transformResult(final ListenableFuture<RpcResult<?>> bindingResult) {
  96         return LazyDOMRpcResultFuture.create(codec, bindingResult);
  97     }
  98 }