Binding v2 runtime - adapters - impl - operations

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

diff --git a/binding2/mdsal-binding2-dom-adapter/src/main/java/org/opendaylight/mdsal/binding/javav2/dom/adapter/impl/operation/BindingDOMOperationImplementationAdapter.java b/binding2/mdsal-binding2-dom-adapter/src/main/java/org/opendaylight/mdsal/binding/javav2/dom/adapter/impl/operation/BindingDOMOperationImplementationAdapter.java
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+++ b/binding2/mdsal-binding2-dom-adapter/src/main/java/org/opendaylight/mdsal/binding/javav2/dom/adapter/impl/operation/BindingDOMOperationImplementationAdapter.java
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+/*
+ * Copyright (c) 2017 Pantheon Technologies s.r.o. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.mdsal.binding.javav2.dom.adapter.impl.operation;
+
+import com.google.common.annotations.Beta;
+import com.google.common.base.Preconditions;
+import com.google.common.cache.Cache;
+import com.google.common.cache.CacheBuilder;
+import com.google.common.util.concurrent.CheckedFuture;
+import com.google.common.util.concurrent.JdkFutureAdapters;
+import com.google.common.util.concurrent.ListenableFuture;
+import java.lang.reflect.Method;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.concurrent.ExecutionException;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import org.opendaylight.mdsal.binding.javav2.dom.adapter.impl.operation.invoker.OperationServiceInvoker;
+import org.opendaylight.mdsal.binding.javav2.dom.codec.impl.BindingNormalizedNodeCodecRegistry;
+import org.opendaylight.mdsal.binding.javav2.dom.codec.serialized.LazySerializedContainerNode;
+import org.opendaylight.mdsal.binding.javav2.runtime.reflection.BindingReflections;
+import org.opendaylight.mdsal.binding.javav2.spec.base.Operation;
+import org.opendaylight.mdsal.binding.javav2.spec.base.TreeNode;
+import org.opendaylight.mdsal.dom.api.DOMRpcException;
+import org.opendaylight.mdsal.dom.api.DOMRpcIdentifier;
+import org.opendaylight.mdsal.dom.api.DOMRpcImplementation;
+import org.opendaylight.mdsal.dom.api.DOMRpcResult;
+import org.opendaylight.yangtools.yang.common.QName;
+import org.opendaylight.yangtools.yang.common.RpcResult;
+import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.opendaylight.yangtools.yang.model.api.SchemaPath;
+
+/**
+ * Operation implementation adapter.
+ */
+@Beta
+public class BindingDOMOperationImplementationAdapter implements DOMRpcImplementation {
+
+    private static final Cache<Class<? extends Operation>, OperationServiceInvoker> SERVICE_INVOKERS =
+            CacheBuilder.newBuilder().weakKeys().build();
+    // Default implementations are 0, we need to perform some translation, hence we have a slightly higher
+    // cost
+    private static final int COST = 1;
+
+    private final BindingNormalizedNodeCodecRegistry codec;
+    private final OperationServiceInvoker invoker;
+    private final Operation delegate;
+    private final QName inputQname;
+
+    <T extends Operation> BindingDOMOperationImplementationAdapter(final BindingNormalizedNodeCodecRegistry codec,
+            final Class<T> type, final Map<SchemaPath, Method> localNameToMethod, final T delegate) {
+        try {
+            this.invoker = SERVICE_INVOKERS.get(type, () -> {
+                final Map<QName, Method> map = new HashMap<>();
+                for (final Entry<SchemaPath, Method> e : localNameToMethod.entrySet()) {
+                    map.put(e.getKey().getLastComponent(), e.getValue());
+                }
+
+                return OperationServiceInvoker.from(map);
+            });
+        } catch (final ExecutionException e) {
+            throw new IllegalArgumentException("Failed to create invokers for type " + type, e);
+        }
+
+        this.codec = Preconditions.checkNotNull(codec);
+        this.delegate = Preconditions.checkNotNull(delegate);
+        inputQname = QName.create(BindingReflections.getQNameModule(type), "input").intern();
+    }
+
+    @Nonnull
+    @Override
+    public CheckedFuture<DOMRpcResult, DOMRpcException> invokeRpc(@Nonnull final DOMRpcIdentifier rpc,
+            @Nullable final NormalizedNode<?, ?> input) {
+
+        final SchemaPath schemaPath = rpc.getType();
+        final TreeNode bindingInput = input != null ? deserialize(rpc.getType(), input) : null;
+        final ListenableFuture<RpcResult<?>> bindingResult = invoke(schemaPath, bindingInput);
+        return transformResult(bindingResult);
+    }
+
+    @Override
+    public long invocationCost() {
+        return COST;
+    }
+
+    private TreeNode deserialize(final SchemaPath rpcPath, final NormalizedNode<?, ?> input) {
+        if (input instanceof LazySerializedContainerNode) {
+            return ((LazySerializedContainerNode) input).bindingData();
+        }
+        final SchemaPath inputSchemaPath = rpcPath.createChild(inputQname);
+        return codec.fromNormalizedNodeOperationData(inputSchemaPath, (ContainerNode) input);
+    }
+
+    private ListenableFuture<RpcResult<?>> invoke(final SchemaPath schemaPath, final TreeNode input) {
+        return JdkFutureAdapters.listenInPoolThread(invoker.invoke(delegate, schemaPath.getLastComponent(), input));
+    }
+
+    private CheckedFuture<DOMRpcResult, DOMRpcException>
+            transformResult(final ListenableFuture<RpcResult<?>> bindingResult) {
+        return LazyDOMOperationResultFuture.create(codec, bindingResult);
+    }
+}