/*
* Copyright (c) 2015 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.dispatch.OnComplete;
import com.google.common.base.Preconditions;
import com.google.common.util.concurrent.AbstractFuture;
import com.google.common.util.concurrent.CheckedFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
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.spi.DefaultDOMRpcResult;
import org.opendaylight.controller.remote.rpc.messages.RpcResponse;
import org.opendaylight.yangtools.yang.common.QName;
import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import scala.concurrent.ExecutionContext;
import scala.concurrent.Future;
class RemoteDOMRpcFuture extends AbstractFuture<DOMRpcResult> implements CheckedFuture<DOMRpcResult, DOMRpcException> {
private static final Logger LOG = LoggerFactory.getLogger(RemoteDOMRpcFuture.class);
private final QName rpcName;
private RemoteDOMRpcFuture(final QName rpcName) {
this.rpcName = Preconditions.checkNotNull(rpcName, "rpcName");
}
public static RemoteDOMRpcFuture create(final QName rpcName) {
return new RemoteDOMRpcFuture(rpcName);
}
protected void failNow(final Throwable error) {
LOG.debug("Failing future {} for rpc {}", this, rpcName, error);
setException(error);
}
protected void completeWith(final Future<Object> future) {
future.onComplete(new FutureUpdater(), ExecutionContext.Implicits$.MODULE$.global());
}
@Override
public DOMRpcResult checkedGet() throws DOMRpcException {
try {
return get();
} catch (final ExecutionException e) {
throw mapException(e);
} catch (final InterruptedException e) {
throw new RemoteDOMRpcException("Interruped while invoking RPC", e);
}
}
@Override
public DOMRpcResult checkedGet(final long timeout, final TimeUnit unit) throws TimeoutException, DOMRpcException {
try {
return get(timeout, unit);
} catch (final ExecutionException e) {
throw mapException(e);
} catch (final InterruptedException e) {
throw new RemoteDOMRpcException("Interruped while invoking RPC", e);
}
}
private static DOMRpcException mapException(final ExecutionException ex) {
final Throwable cause = ex.getCause();
if (cause instanceof DOMRpcException) {
return (DOMRpcException) cause;
}
return new RemoteDOMRpcException("Exception during invoking RPC", ex);
}
private final class FutureUpdater extends OnComplete<Object> {
@Override
public void onComplete(final Throwable error, final Object reply) throws Throwable {
if (error != null) {
RemoteDOMRpcFuture.this.failNow(error);
} else if (reply instanceof RpcResponse) {
final RpcResponse rpcReply = (RpcResponse) reply;
final NormalizedNode<?, ?> result = rpcReply.getResultNormalizedNode();
LOG.debug("Received response for rpc {}: result is {}", rpcName, result);
RemoteDOMRpcFuture.this.set(new DefaultDOMRpcResult(result));
LOG.debug("Future {} for rpc {} successfully completed", RemoteDOMRpcFuture.this, rpcName);
} else {
RemoteDOMRpcFuture.this.failNow(new IllegalStateException("Incorrect reply type " + reply
+ "from Akka"));
}
}
}
}