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.Futures;
  16 import com.google.common.util.concurrent.JdkFutureAdapters;
  17 import com.google.common.util.concurrent.ListenableFuture;
  18 import java.lang.reflect.Method;
  19 import java.util.HashMap;
  20 import java.util.Map;
  21 import java.util.Map.Entry;
  22 import java.util.concurrent.ExecutionException;
  23 import javax.annotation.Nonnull;
  24 import javax.annotation.Nullable;
  25 import org.opendaylight.mdsal.binding.javav2.dom.adapter.impl.operation.invoker.OperationServiceInvoker;
  26 import org.opendaylight.mdsal.binding.javav2.dom.codec.impl.BindingNormalizedNodeCodecRegistry;
  27 import org.opendaylight.mdsal.binding.javav2.dom.codec.serialized.LazySerializedContainerNode;
  28 import org.opendaylight.mdsal.binding.javav2.runtime.reflection.BindingReflections;
  29 import org.opendaylight.mdsal.binding.javav2.spec.base.Operation;
  30 import org.opendaylight.mdsal.binding.javav2.spec.base.TreeNode;
  31 import org.opendaylight.mdsal.dom.api.DOMRpcException;
  32 import org.opendaylight.mdsal.dom.api.DOMRpcIdentifier;
  33 import org.opendaylight.mdsal.dom.api.DOMRpcImplementation;
  34 import org.opendaylight.mdsal.dom.api.DOMRpcResult;
  35 import org.opendaylight.yangtools.util.concurrent.ExceptionMapper;
  36 import org.opendaylight.yangtools.yang.common.QName;
  37 import org.opendaylight.yangtools.yang.common.RpcResult;
  38 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  39 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  40 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  41
  42 /**
  43  * Operation implementation adapter.
  44  */
  45 @Beta
  46 public class BindingDOMOperationImplementationAdapter implements DOMRpcImplementation {
  47
  48     private static final Cache<Class<? extends Operation>, OperationServiceInvoker> SERVICE_INVOKERS =
  49             CacheBuilder.newBuilder().weakKeys().build();
  50     // Default implementations are 0, we need to perform some translation, hence we have a slightly higher
  51     // cost
  52     private static final int COST = 1;
  53
  54     private final BindingNormalizedNodeCodecRegistry codec;
  55     private final OperationServiceInvoker invoker;
  56     private final Operation delegate;
  57     private final QName inputQname;
  58
  59     <T extends Operation> BindingDOMOperationImplementationAdapter(final BindingNormalizedNodeCodecRegistry codec,
  60             final Class<T> type, final Map<SchemaPath, Method> localNameToMethod, final T delegate) {
  61         try {
  62             this.invoker = SERVICE_INVOKERS.get(type, () -> {
  63                 final Map<QName, Method> map = new HashMap<>();
  64                 for (final Entry<SchemaPath, Method> e : localNameToMethod.entrySet()) {
  65                     map.put(e.getKey().getLastComponent(), e.getValue());
  66                 }
  67
  68                 return OperationServiceInvoker.from(map);
  69             });
  70         } catch (final ExecutionException e) {
  71             throw new IllegalArgumentException("Failed to create invokers for type " + type, e);
  72         }
  73
  74         this.codec = Preconditions.checkNotNull(codec);
  75         this.delegate = Preconditions.checkNotNull(delegate);
  76         inputQname = QName.create(BindingReflections.getQNameModule(type), "input").intern();
  77     }
  78
  79     @SuppressWarnings("deprecation")
  80     @Nonnull
  81     @Override
  82     public CheckedFuture<DOMRpcResult, DOMRpcException> invokeRpc(@Nonnull final DOMRpcIdentifier rpc,
  83             @Nullable final NormalizedNode<?, ?> input) {
  84
  85         final SchemaPath schemaPath = rpc.getType();
  86         final TreeNode bindingInput = input != null ? deserialize(rpc.getType(), input) : null;
  87         final ListenableFuture<RpcResult<?>> bindingResult = invoke(schemaPath, bindingInput);
  88         return Futures.makeChecked(transformResult(bindingResult),
  89                 new ExceptionMapper<DOMRpcException>("invokeRPc", DOMRpcException.class) {
  90
  91                     @Override
  92                     protected DOMRpcException newWithCause(final String message, final Throwable cause) {
  93                         return new DOMRpcInvokeException(message, cause);
  94                     }
  95                 });
  96     }
  97
  98     private class DOMRpcInvokeException extends DOMRpcException {
  99
 100         private static final long serialVersionUID = 1L;
 101
 102         protected DOMRpcInvokeException(final String message, final Throwable cause) {
 103             super(message, cause);
 104         }
 105     }
 106
 107     @Override
 108     public long invocationCost() {
 109         return COST;
 110     }
 111
 112     private TreeNode deserialize(final SchemaPath rpcPath, final NormalizedNode<?, ?> input) {
 113         if (input instanceof LazySerializedContainerNode) {
 114             return ((LazySerializedContainerNode) input).bindingData();
 115         }
 116         final SchemaPath inputSchemaPath = rpcPath.createChild(inputQname);
 117         return codec.fromNormalizedNodeOperationData(inputSchemaPath, (ContainerNode) input);
 118     }
 119
 120     private ListenableFuture<RpcResult<?>> invoke(final SchemaPath schemaPath, final TreeNode input) {
 121         return JdkFutureAdapters.listenInPoolThread(invoker.invoke(delegate, schemaPath.getLastComponent(), input));
 122     }
 123
 124     private ListenableFuture<DOMRpcResult>
 125             transformResult(final ListenableFuture<RpcResult<?>> bindingResult) {
 126         return LazyDOMOperationResultFuture.create(codec, bindingResult);
 127     }
 128 }