X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-distributed-datastore%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fcluster%2Fdatabroker%2FClientBackedReadTransaction.java;fp=opendaylight%2Fmd-sal%2Fsal-distributed-datastore%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fcluster%2Fdatabroker%2FClientBackedReadTransaction.java;h=3d10c3976069da637cc9935a16a6828831d4c7e3;hb=5a0edd493bafc365647bc6311b4b7da86a78645d;hp=0000000000000000000000000000000000000000;hpb=b43daac0b7a097f2f5585f38ba475bcc1540b776;p=controller.git diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/ClientBackedReadTransaction.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/ClientBackedReadTransaction.java new file mode 100644 index 0000000000..3d10c39760 --- /dev/null +++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/ClientBackedReadTransaction.java @@ -0,0 +1,60 @@ +/* + * Copyright (c) 2016 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.Optional; +import com.google.common.util.concurrent.CheckedFuture; +import com.google.common.util.concurrent.Futures; +import java.util.concurrent.atomic.AtomicReferenceFieldUpdater; +import javax.annotation.Nullable; +import org.opendaylight.controller.cluster.databroker.actors.dds.ClientSnapshot; +import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException; +import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadTransaction; +import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier; +import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode; + +/** + * An implementation of {@link DOMStoreReadTransaction} backed by a {@link ClientSnapshot}. Used for standalone + * transactions. + * + * @author Robert Varga + */ +final class ClientBackedReadTransaction extends ClientBackedTransaction + implements DOMStoreReadTransaction { + private static final AtomicReferenceFieldUpdater + PARENT_UPDATER = AtomicReferenceFieldUpdater.newUpdater(ClientBackedReadTransaction.class, + ClientBackedTransactionChain.class, "parent"); + + @SuppressWarnings("unused") + private volatile ClientBackedTransactionChain parent; + + ClientBackedReadTransaction(final ClientSnapshot delegate, @Nullable final ClientBackedTransactionChain parent) { + super(delegate); + this.parent = parent; + } + + @Override + public CheckedFuture>, ReadFailedException> read(final YangInstanceIdentifier path) { + return Futures.makeChecked(delegate().read(path), ReadFailedException.MAPPER); + } + + @Override + public CheckedFuture exists(final YangInstanceIdentifier path) { + return Futures.makeChecked(delegate().exists(path), ReadFailedException.MAPPER); + } + + @Override + public void close() { + super.close(); + + final ClientBackedTransactionChain local = PARENT_UPDATER.getAndSet(this, null); + if (local != null) { + local.snapshotClosed(delegate()); + } + } +}