binding2/mdsal-binding2-dom-adapter/src/main/java/org/opendaylight/mdsal/binding/javav2/dom/adapter/impl/operation/BindingDOMOperationImplementationAdapter.java

   1 /*
   2  * Copyright (c) 2017 Pantheon Technologies s.r.o. 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.javav2.dom.adapter.impl.operation;
   9
  10 import com.google.common.annotations.Beta;
  11 import com.google.common.base.Preconditions;
  12 import com.google.common.cache.Cache;
  13 import com.google.common.cache.CacheBuilder;
  14 import com.google.common.util.concurrent.CheckedFuture;
  15 import com.google.common.util.concurrent.JdkFutureAdapters;
  16 import com.google.common.util.concurrent.ListenableFuture;
  17 import java.lang.reflect.Method;
  18 import java.util.HashMap;
  19 import java.util.Map;
  20 import java.util.Map.Entry;
  21 import java.util.concurrent.ExecutionException;
  22 import javax.annotation.Nonnull;
  23 import javax.annotation.Nullable;
  24 import org.opendaylight.mdsal.binding.javav2.dom.adapter.impl.operation.invoker.OperationServiceInvoker;
  25 import org.opendaylight.mdsal.binding.javav2.dom.codec.impl.BindingNormalizedNodeCodecRegistry;
  26 import org.opendaylight.mdsal.binding.javav2.dom.codec.serialized.LazySerializedContainerNode;
  27 import org.opendaylight.mdsal.binding.javav2.runtime.reflection.BindingReflections;
  28 import org.opendaylight.mdsal.binding.javav2.spec.base.Operation;
  29 import org.opendaylight.mdsal.binding.javav2.spec.base.TreeNode;
  30 import org.opendaylight.mdsal.dom.api.DOMRpcException;
  31 import org.opendaylight.mdsal.dom.api.DOMRpcIdentifier;
  32 import org.opendaylight.mdsal.dom.api.DOMRpcImplementation;
  33 import org.opendaylight.mdsal.dom.api.DOMRpcResult;
  34 import org.opendaylight.yangtools.yang.common.QName;
  35 import org.opendaylight.yangtools.yang.common.RpcResult;
  36 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  37 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  38 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  39
  40 /**
  41  * Operation implementation adapter.
  42  */
  43 @Beta
  44 public class BindingDOMOperationImplementationAdapter implements DOMRpcImplementation {
  45
  46     private static final Cache<Class<? extends Operation>, OperationServiceInvoker> SERVICE_INVOKERS =
  47             CacheBuilder.newBuilder().weakKeys().build();
  48     // Default implementations are 0, we need to perform some translation, hence we have a slightly higher
  49     // cost
  50     private static final int COST = 1;
  51
  52     private final BindingNormalizedNodeCodecRegistry codec;
  53     private final OperationServiceInvoker invoker;
  54     private final Operation delegate;
  55     private final QName inputQname;
  56
  57     <T extends Operation> BindingDOMOperationImplementationAdapter(final BindingNormalizedNodeCodecRegistry codec,
  58             final Class<T> type, final Map<SchemaPath, Method> localNameToMethod, final T delegate) {
  59         try {
  60             this.invoker = SERVICE_INVOKERS.get(type, () -> {
  61                 final Map<QName, Method> map = new HashMap<>();
  62                 for (final Entry<SchemaPath, Method> e : localNameToMethod.entrySet()) {
  63                     map.put(e.getKey().getLastComponent(), e.getValue());
  64                 }
  65
  66                 return OperationServiceInvoker.from(map);
  67             });
  68         } catch (final ExecutionException e) {
  69             throw new IllegalArgumentException("Failed to create invokers for type " + type, e);
  70         }
  71
  72         this.codec = Preconditions.checkNotNull(codec);
  73         this.delegate = Preconditions.checkNotNull(delegate);
  74         inputQname = QName.create(BindingReflections.getQNameModule(type), "input").intern();
  75     }
  76
  77     @Nonnull
  78     @Override
  79     public CheckedFuture<DOMRpcResult, DOMRpcException> invokeRpc(@Nonnull final DOMRpcIdentifier rpc,
  80             @Nullable final NormalizedNode<?, ?> input) {
  81
  82         final SchemaPath schemaPath = rpc.getType();
  83         final TreeNode bindingInput = input != null ? deserialize(rpc.getType(), input) : null;
  84         final ListenableFuture<RpcResult<?>> bindingResult = invoke(schemaPath, bindingInput);
  85         return transformResult(bindingResult);
  86     }
  87
  88     @Override
  89     public long invocationCost() {
  90         return COST;
  91     }
  92
  93     private TreeNode deserialize(final SchemaPath rpcPath, final NormalizedNode<?, ?> input) {
  94         if (input instanceof LazySerializedContainerNode) {
  95             return ((LazySerializedContainerNode) input).bindingData();
  96         }
  97         final SchemaPath inputSchemaPath = rpcPath.createChild(inputQname);
  98         return codec.fromNormalizedNodeOperationData(inputSchemaPath, (ContainerNode) input);
  99     }
 100
 101     private ListenableFuture<RpcResult<?>> invoke(final SchemaPath schemaPath, final TreeNode input) {
 102         return JdkFutureAdapters.listenInPoolThread(invoker.invoke(delegate, schemaPath.getLastComponent(), input));
 103     }
 104
 105     private CheckedFuture<DOMRpcResult, DOMRpcException>
 106             transformResult(final ListenableFuture<RpcResult<?>> bindingResult) {
 107         return LazyDOMOperationResultFuture.create(codec, bindingResult);
 108     }
 109 }