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/*
* Copyright (c) 2016 Cisco and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.fd.honeycomb.rpc;
import static net.javacrumbs.futureconverter.java8guava.FutureConverter.toListenableFuture;
import com.google.common.base.Function;
import com.google.common.util.concurrent.CheckedFuture;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import java.util.concurrent.CompletableFuture;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import org.opendaylight.controller.md.sal.dom.api.DOMRpcAvailabilityListener;
import org.opendaylight.controller.md.sal.dom.api.DOMRpcException;
import org.opendaylight.controller.md.sal.dom.api.DOMRpcResult;
import org.opendaylight.controller.md.sal.dom.api.DOMRpcService;
import org.opendaylight.controller.md.sal.dom.spi.DefaultDOMRpcResult;
import org.opendaylight.mdsal.binding.dom.codec.api.BindingNormalizedNodeSerializer;
import org.opendaylight.yangtools.concepts.ListenerRegistration;
import org.opendaylight.yangtools.yang.binding.DataObject;
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;
public final class HoneycombDOMRpcService implements DOMRpcService {
private static final Function<? super Exception, DOMRpcException> ANY_EX_TO_RPC_EXCEPTION_MAPPER =
(Function<Exception, DOMRpcException>) e -> (e instanceof DOMRpcException)
? (DOMRpcException) e
: new RpcException("RPC failed", e);
private final BindingNormalizedNodeSerializer serializer;
private final RpcRegistry rpcRegistry;
public HoneycombDOMRpcService(@Nonnull final BindingNormalizedNodeSerializer serializer,
@Nonnull final RpcRegistry rpcRegistry) {
this.serializer = serializer;
this.rpcRegistry = rpcRegistry;
}
@Nonnull
@Override
public CheckedFuture<DOMRpcResult, DOMRpcException> invokeRpc(@Nonnull final SchemaPath schemaPath,
@Nullable final NormalizedNode<?, ?> normalizedNode) {
DataObject input = null;
if (normalizedNode != null) {
// RPC input is optional
final SchemaPath nodePatch = schemaPath.createChild(normalizedNode.getNodeType());
input = serializer.fromNormalizedNodeRpcData(nodePatch, (ContainerNode) normalizedNode);
}
final CompletableFuture<DataObject> result = rpcRegistry.invoke(schemaPath, input).toCompletableFuture();
final ListenableFuture<DOMRpcResult> output = getDOMRpcResult(toListenableFuture(result));
return Futures.makeChecked(output, ANY_EX_TO_RPC_EXCEPTION_MAPPER);
}
private ListenableFuture<DOMRpcResult> getDOMRpcResult(final ListenableFuture<DataObject> invoke) {
return Futures.transform(
invoke,
output -> {
// If result is available convert it to BI form. Otherwise pass null as DOMRpcResult expects.
ContainerNode outputNode = null;
if (output != null) {
outputNode = serializer.toNormalizedNodeRpcData(output);
}
return new DefaultDOMRpcResult(outputNode);
});
}
@Nonnull
@Override
public <T extends DOMRpcAvailabilityListener> ListenerRegistration<T> registerRpcListener(@Nonnull final T t) {
return new ListenerRegistration<T>() {
@Override
public void close() {
// Noop
}
@Override
public T getInstance() {
return t;
}
};
}
}
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