+++ /dev/null
-/*
- * 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.md.sal.dom.store.impl;
-
-import static com.google.common.base.Preconditions.checkNotNull;
-import static com.google.common.base.Preconditions.checkState;
-
-import org.opendaylight.controller.md.sal.dom.store.impl.tree.DataTreeSnapshot;
-import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadTransaction;
-import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier;
-import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import com.google.common.base.Optional;
-import com.google.common.base.Preconditions;
-import com.google.common.util.concurrent.Futures;
-import com.google.common.util.concurrent.ListenableFuture;
-
-/**
- *
- * Implementation of read-only transaction backed by {@link DataTreeSnapshot}
- *
- * Implementation of read-only transaction backed by {@link DataTreeSnapshot}
- * which delegates most of its calls to similar methods provided by underlying snapshot.
- *
- */
-final class SnapshotBackedReadTransaction extends AbstractDOMStoreTransaction implements
-DOMStoreReadTransaction {
- private static final Logger LOG = LoggerFactory.getLogger(SnapshotBackedReadTransaction.class);
- private DataTreeSnapshot stableSnapshot;
-
- public SnapshotBackedReadTransaction(final Object identifier, final DataTreeSnapshot snapshot) {
- super(identifier);
- this.stableSnapshot = Preconditions.checkNotNull(snapshot);
- LOG.debug("ReadOnly Tx: {} allocated with snapshot {}", identifier, snapshot);
- }
-
- @Override
- public void close() {
- LOG.debug("Store transaction: {} : Closed", getIdentifier());
- stableSnapshot = null;
- }
-
- @Override
- public ListenableFuture<Optional<NormalizedNode<?, ?>>> read(final InstanceIdentifier path) {
- checkNotNull(path, "Path must not be null.");
- checkState(stableSnapshot != null, "Transaction is closed");
- return Futures.immediateFuture(stableSnapshot.readNode(path));
- }
-}
\ No newline at end of file