Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance. Project price only 1 $
You can buy this project and download/modify it how often you want.
/*
* 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.cluster.databroker;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkState;
import static java.util.Objects.requireNonNull;
import static org.opendaylight.yangtools.util.concurrent.FluentFutures.immediateFailedFluentFuture;
import com.google.common.base.MoreObjects.ToStringHelper;
import com.google.common.util.concurrent.FluentFuture;
import com.google.common.util.concurrent.Futures;
import java.util.Map;
import java.util.concurrent.Future;
import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;
import org.opendaylight.mdsal.common.api.CommitInfo;
import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
import org.opendaylight.mdsal.dom.api.DOMDataTreeWriteTransaction;
import org.opendaylight.mdsal.dom.broker.TransactionCommitFailedExceptionMapper;
import org.opendaylight.mdsal.dom.spi.store.DOMStoreTransactionFactory;
import org.opendaylight.mdsal.dom.spi.store.DOMStoreWriteTransaction;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public abstract class AbstractDOMBrokerWriteTransaction
extends AbstractDOMBrokerTransaction implements DOMDataTreeWriteTransaction {
@SuppressWarnings("rawtypes")
private static final AtomicReferenceFieldUpdater
IMPL_UPDATER = AtomicReferenceFieldUpdater.newUpdater(AbstractDOMBrokerWriteTransaction.class,
AbstractDOMTransactionFactory.class, "commitImpl");
@SuppressWarnings("rawtypes")
private static final AtomicReferenceFieldUpdater FUTURE_UPDATER =
AtomicReferenceFieldUpdater.newUpdater(AbstractDOMBrokerWriteTransaction.class, Future.class,
"commitFuture");
private static final Logger LOG = LoggerFactory.getLogger(AbstractDOMBrokerWriteTransaction.class);
private static final Future CANCELLED_FUTURE = Futures.immediateCancelledFuture();
/**
* Implementation of real commit. It also acts as an indication that
* the transaction is running -- which we flip atomically using
* {@link #IMPL_UPDATER}.
*/
private volatile AbstractDOMTransactionFactory commitImpl;
/**
* Future task of transaction commit. It starts off as null, but is
* set appropriately on {@link #submit()} and {@link #cancel()} via
* {@link AtomicReferenceFieldUpdater#lazySet(Object, Object)}.
*
* Lazy set is safe for use because it is only referenced to in the
* {@link #cancel()} slow path, where we will busy-wait for it. The
* fast path gets the benefit of a store-store barrier instead of the
* usual store-load barrier.
*/
private volatile Future commitFuture;
protected AbstractDOMBrokerWriteTransaction(final Object identifier,
final Map storeTxFactories,
final AbstractDOMTransactionFactory commitImpl) {
super(identifier, storeTxFactories);
this.commitImpl = requireNonNull(commitImpl, "commitImpl must not be null.");
}
@Override
public void put(final LogicalDatastoreType store, final YangInstanceIdentifier path, final NormalizedNode data) {
checkRunning(commitImpl);
checkInstanceIdentifierReferencesData(path,data);
getSubtransaction(store).write(path, data);
}
private static void checkInstanceIdentifierReferencesData(final YangInstanceIdentifier path,
final NormalizedNode data) {
checkArgument(data != null, "Attempted to store null data at %s", path);
final PathArgument lastArg = path.getLastPathArgument();
if (lastArg != null) {
checkArgument(lastArg.equals(data.name()),
"Instance identifier references %s but data identifier is %s", lastArg, data);
}
}
@Override
public void delete(final LogicalDatastoreType store, final YangInstanceIdentifier path) {
checkRunning(commitImpl);
getSubtransaction(store).delete(path);
}
@Override
public void merge(final LogicalDatastoreType store, final YangInstanceIdentifier path, final NormalizedNode data) {
checkRunning(commitImpl);
checkInstanceIdentifierReferencesData(path, data);
getSubtransaction(store).merge(path, data);
}
@Override
public boolean cancel() {
final AbstractDOMTransactionFactory impl = IMPL_UPDATER.getAndSet(this, null);
if (impl != null) {
LOG.trace("Transaction {} cancelled before submit", getIdentifier());
FUTURE_UPDATER.lazySet(this, CANCELLED_FUTURE);
closeSubtransaction();
return true;
}
// The transaction is in process of being submitted or cancelled. Busy-wait
// for the corresponding future.
Future future;
do {
future = commitFuture;
}
while (future == null);
return future.cancel(false);
}
@Override
@SuppressWarnings("checkstyle:IllegalCatch")
public FluentFuture commit() {
final AbstractDOMTransactionFactory impl = IMPL_UPDATER.getAndSet(this, null);
checkRunning(impl);
FluentFuture ret;
final var tx = getSubtransaction();
if (tx == null) {
ret = CommitInfo.emptyFluentFuture();
} else {
try {
ret = impl.commit(this, tx.ready());
} catch (RuntimeException e) {
ret = immediateFailedFluentFuture(TransactionCommitFailedExceptionMapper.COMMIT_ERROR_MAPPER.apply(e));
}
}
FUTURE_UPDATER.lazySet(this, ret);
return ret;
}
private void checkRunning(final AbstractDOMTransactionFactory impl) {
checkState(impl != null, "Transaction %s is no longer running", getIdentifier());
}
@Override
protected ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
return super.addToStringAttributes(toStringHelper).add("running", commitImpl == null);
}
}
