/*
* Copyright (c) 2014 Cisco Systems, Inc. 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.controller.remote.rpc;
import akka.actor.ActorRef;
import akka.actor.Props;
import com.google.common.base.Preconditions;
import com.google.common.base.Throwables;
import com.google.common.util.concurrent.CheckedFuture;
import com.google.common.util.concurrent.FutureCallback;
import com.google.common.util.concurrent.Futures;
import org.opendaylight.controller.cluster.common.actor.AbstractUntypedActor;
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.remote.rpc.messages.ExecuteRpc;
import org.opendaylight.controller.remote.rpc.messages.RpcResponse;
import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
import org.opendaylight.yangtools.yang.model.api.SchemaPath;
/**
* Actor receiving invocation requests from remote nodes, routing them to
* {@link DOMRpcService#invokeRpc(SchemaPath, NormalizedNode)}.
*/
final class RpcInvoker extends AbstractUntypedActor {
private final DOMRpcService rpcService;
private RpcInvoker(final DOMRpcService rpcService) {
this.rpcService = Preconditions.checkNotNull(rpcService);
}
public static Props props(final DOMRpcService rpcService) {
Preconditions.checkNotNull(rpcService, "DOMRpcService can not be null");
return Props.create(RpcInvoker.class, rpcService);
}
@Override
protected void handleReceive(final Object message) {
if (message instanceof ExecuteRpc) {
executeRpc((ExecuteRpc) message);
} else {
unknownMessage(message);
}
}
@SuppressWarnings("checkstyle:IllegalCatch")
private void executeRpc(final ExecuteRpc msg) {
LOG.debug("Executing rpc {}", msg.getRpc());
final SchemaPath schemaPath = SchemaPath.create(true, msg.getRpc());
final ActorRef sender = getSender();
final ActorRef self = self();
final CheckedFuture<DOMRpcResult, DOMRpcException> future;
try {
future = rpcService.invokeRpc(schemaPath, msg.getInputNormalizedNode());
} catch (final RuntimeException e) {
LOG.debug("Failed to invoke RPC {}", msg.getRpc(), e);
sender.tell(new akka.actor.Status.Failure(e), sender);
return;
}
Futures.addCallback(future, new FutureCallback<DOMRpcResult>() {
@Override
public void onSuccess(final DOMRpcResult result) {
if (result == null) {
// This shouldn't happen but the FutureCallback annotates the result param with Nullable so
// handle null here to avoid FindBugs warning.
LOG.debug("Got null DOMRpcResult - sending null response for execute rpc : {}", msg.getRpc());
sender.tell(new RpcResponse(null), self);
return;
}
if (!result.getErrors().isEmpty()) {
final String message = String.format("Execution of RPC %s failed", msg.getRpc());
sender.tell(new akka.actor.Status.Failure(new RpcErrorsException(message, result.getErrors())),
self);
} else {
LOG.debug("Sending response for execute rpc : {}", msg.getRpc());
sender.tell(new RpcResponse(result.getResult()), self);
}
}
@Override
public void onFailure(final Throwable failure) {
LOG.debug("Failed to execute RPC {}", msg.getRpc(), failure);
LOG.error("Failed to execute RPC {} due to {}. More details are available on DEBUG level.",
msg.getRpc(), Throwables.getRootCause(failure));
sender.tell(new akka.actor.Status.Failure(failure), self);
}
});
}
}