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.CheckedFuture;
  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.DOMRpcException;
  25 import org.opendaylight.mdsal.dom.api.DOMRpcIdentifier;
  26 import org.opendaylight.mdsal.dom.api.DOMRpcImplementation;
  27 import org.opendaylight.mdsal.dom.api.DOMRpcResult;
  28 import org.opendaylight.yangtools.yang.binding.DataObject;
  29 import org.opendaylight.yangtools.yang.binding.RpcService;
  30 import org.opendaylight.yangtools.yang.common.QName;
  31 import org.opendaylight.yangtools.yang.common.RpcResult;
  32 import org.opendaylight.yangtools.yang.common.YangConstants;
  33 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  34 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  35 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  36
  37 public class BindingDOMRpcImplementationAdapter implements DOMRpcImplementation {
  38
  39     private static final Cache<Class<?>, RpcServiceInvoker> SERVICE_INVOKERS
  40             = CacheBuilder.newBuilder().weakKeys().build();
  41     // Default implementations are 0, we need to perform some translation, hence we have a slightly higher cost
  42     private static final int COST = 1;
  43
  44     private final BindingNormalizedNodeCodecRegistry codec;
  45     private final RpcServiceInvoker invoker;
  46     private final RpcService delegate;
  47     private final QName inputQname;
  48
  49     <T extends RpcService> BindingDOMRpcImplementationAdapter(final BindingNormalizedNodeCodecRegistry codec,
  50             final Class<T> type, final Map<SchemaPath, Method> localNameToMethod, final T delegate) {
  51         try {
  52             this.invoker = SERVICE_INVOKERS.get(type, () -> {
  53                 final Map<QName, Method> map = new HashMap<>();
  54                 for (Entry<SchemaPath, Method> e : localNameToMethod.entrySet()) {
  55                     map.put(e.getKey().getLastComponent(), e.getValue());
  56                 }
  57
  58                 return RpcServiceInvoker.from(map);
  59             });
  60         } catch (ExecutionException e) {
  61             throw new IllegalArgumentException("Failed to create invokers for type " + type, e);
  62         }
  63
  64         this.codec = Preconditions.checkNotNull(codec);
  65         this.delegate = Preconditions.checkNotNull(delegate);
  66         inputQname = YangConstants.operationInputQName(BindingReflections.getQNameModule(type)).intern();
  67     }
  68
  69     @Nonnull
  70     @Override
  71     public CheckedFuture<DOMRpcResult, DOMRpcException> invokeRpc(@Nonnull final DOMRpcIdentifier rpc,
  72             final NormalizedNode<?, ?> input) {
  73
  74         final SchemaPath schemaPath = rpc.getType();
  75         final DataObject bindingInput = input != null ? deserialize(rpc.getType(), input) : null;
  76         final ListenableFuture<RpcResult<?>> bindingResult = invoke(schemaPath, bindingInput);
  77         return transformResult(bindingResult);
  78     }
  79
  80     @Override
  81     public long invocationCost() {
  82         return COST;
  83     }
  84
  85     private DataObject deserialize(final SchemaPath rpcPath, final NormalizedNode<?, ?> input) {
  86         if (input instanceof BindingDataAware) {
  87             return ((BindingDataAware) input).bindingData();
  88         }
  89         final SchemaPath inputSchemaPath = rpcPath.createChild(inputQname);
  90         return codec.fromNormalizedNodeRpcData(inputSchemaPath, (ContainerNode) input);
  91     }
  92
  93     private ListenableFuture<RpcResult<?>> invoke(final SchemaPath schemaPath, final DataObject input) {
  94         return invoker.invokeRpc(delegate, schemaPath.getLastComponent(), input);
  95     }
  96
  97     private CheckedFuture<DOMRpcResult, DOMRpcException> transformResult(
  98             final ListenableFuture<RpcResult<?>> bindingResult) {
  99         return LazyDOMRpcResultFuture.create(codec, bindingResult);
 100     }
 101 }