+++ /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 com.google.common.base.Preconditions;
-import com.google.common.util.concurrent.CheckedFuture;
-import com.google.common.util.concurrent.Futures;
-import com.google.common.util.concurrent.ListenableFuture;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Map;
-import java.util.concurrent.Future;
-import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;
-import org.opendaylight.controller.md.sal.common.api.TransactionStatus;
-import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
-import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
-import org.opendaylight.controller.md.sal.common.impl.service.AbstractDataTransaction;
-import org.opendaylight.controller.md.sal.dom.api.DOMDataWriteTransaction;
-import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort;
-import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction;
-import org.opendaylight.yangtools.yang.common.RpcResult;
-import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
-import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-public class DOMBrokerWriteOnlyTransaction<T extends DOMStoreWriteTransaction>
- extends AbstractDOMBrokerTransaction<LogicalDatastoreType, T> implements DOMDataWriteTransaction {
-
- private static final AtomicReferenceFieldUpdater<DOMBrokerWriteOnlyTransaction, AbstractDOMTransactionFactory> IMPL_UPDATER =
- AtomicReferenceFieldUpdater.newUpdater(DOMBrokerWriteOnlyTransaction.class, AbstractDOMTransactionFactory.class, "commitImpl");
- @SuppressWarnings("rawtypes")
- private static final AtomicReferenceFieldUpdater<DOMBrokerWriteOnlyTransaction, Future> FUTURE_UPDATER =
- AtomicReferenceFieldUpdater.newUpdater(DOMBrokerWriteOnlyTransaction.class, Future.class, "commitFuture");
- private static final Logger LOG = LoggerFactory.getLogger(DOMBrokerWriteOnlyTransaction.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 DOMBrokerWriteOnlyTransaction(final Object identifier,
- Map storeTxFactories, final AbstractDOMTransactionFactory<?> commitImpl) {
- super(identifier, storeTxFactories);
- this.commitImpl = Preconditions.checkNotNull(commitImpl, "commitImpl must not be null.");
- }
-
- @Override
- protected T createTransaction(LogicalDatastoreType key) {
- // FIXME : Casting shouldn't be necessary here
- return (T) getTxFactory(key).newWriteOnlyTransaction();
- }
-
- @Override
- public void put(final LogicalDatastoreType store, final YangInstanceIdentifier path, final NormalizedNode<?, ?> data) {
- checkRunning(commitImpl);
- getSubtransaction(store).write(path, 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);
- 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);
- closeSubtransactions();
- 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);
- }
-
- @Deprecated
- @Override
- public ListenableFuture<RpcResult<TransactionStatus>> commit() {
- return AbstractDataTransaction.convertToLegacyCommitFuture(submit());
- }
-
- @Override
- public CheckedFuture<Void, TransactionCommitFailedException> submit() {
- final AbstractDOMTransactionFactory<?> impl = IMPL_UPDATER.getAndSet(this, null);
- checkRunning(impl);
-
- final Collection<T> txns = getSubtransactions();
- final Collection<DOMStoreThreePhaseCommitCohort> cohorts = new ArrayList<>(txns.size());
-
- // FIXME: deal with errors thrown by backed (ready and submit can fail in theory)
- for (DOMStoreWriteTransaction txn : txns) {
- cohorts.add(txn.ready());
- }
-
- final CheckedFuture<Void, TransactionCommitFailedException> ret = impl.submit(this, cohorts);
- FUTURE_UPDATER.lazySet(this, ret);
- return ret;
- }
-
- private void checkRunning(final AbstractDOMTransactionFactory<?> impl) {
- Preconditions.checkState(impl != null, "Transaction %s is no longer running", getIdentifier());
- }
-
-}
Code Review / controller.git / blobdiff