+++ /dev/null
-/*
- * 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<T extends DOMStoreWriteTransaction>
- extends AbstractDOMBrokerTransaction<T> implements DOMDataTreeWriteTransaction {
-
- @SuppressWarnings("rawtypes")
- private static final AtomicReferenceFieldUpdater<AbstractDOMBrokerWriteTransaction, AbstractDOMTransactionFactory>
- IMPL_UPDATER = AtomicReferenceFieldUpdater.newUpdater(AbstractDOMBrokerWriteTransaction.class,
- AbstractDOMTransactionFactory.class, "commitImpl");
- @SuppressWarnings("rawtypes")
- private static final AtomicReferenceFieldUpdater<AbstractDOMBrokerWriteTransaction, Future> 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)}.
- * <p/>
- * 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<LogicalDatastoreType, ? extends DOMStoreTransactionFactory> 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<? extends CommitInfo> commit() {
- final AbstractDOMTransactionFactory<?> impl = IMPL_UPDATER.getAndSet(this, null);
- checkRunning(impl);
-
- FluentFuture<? extends CommitInfo> 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);
- }
-}
Code Review / controller.git / blobdiff