X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?p=controller.git;a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-dom-spi%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fsal%2Fcore%2Fspi%2Fdata%2FSnapshotBackedReadWriteTransaction.java;fp=opendaylight%2Fmd-sal%2Fsal-dom-spi%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fsal%2Fcore%2Fspi%2Fdata%2FSnapshotBackedReadWriteTransaction.java;h=30abf878b3999775fd4879d14ca4824470fd837a;hp=0000000000000000000000000000000000000000;hb=978152c5de3bf78ab6da5da4c2db391eec063429;hpb=0f3ae2f9e4151a60245a2b295cc7998f0d0e745f diff --git a/opendaylight/md-sal/sal-dom-spi/src/main/java/org/opendaylight/controller/sal/core/spi/data/SnapshotBackedReadWriteTransaction.java b/opendaylight/md-sal/sal-dom-spi/src/main/java/org/opendaylight/controller/sal/core/spi/data/SnapshotBackedReadWriteTransaction.java new file mode 100644 index 0000000000..30abf878b3 --- /dev/null +++ b/opendaylight/md-sal/sal-dom-spi/src/main/java/org/opendaylight/controller/sal/core/spi/data/SnapshotBackedReadWriteTransaction.java @@ -0,0 +1,67 @@ +/* + * 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.sal.core.spi.data; + +import static com.google.common.base.Preconditions.checkNotNull; +import com.google.common.annotations.Beta; +import com.google.common.base.Optional; +import com.google.common.util.concurrent.CheckedFuture; +import com.google.common.util.concurrent.Futures; +import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException; +import org.opendaylight.controller.sal.core.spi.data.SnapshotBackedWriteTransaction.TransactionReadyPrototype; +import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier; +import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode; +import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshot; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * Implementation of Read-Write transaction which is backed by {@link DataTreeSnapshot} + * and executed according to {@link TransactionReadyPrototype}. + * + * @param identifier type + */ +@Beta +public final class SnapshotBackedReadWriteTransaction extends SnapshotBackedWriteTransaction implements DOMStoreReadWriteTransaction { + private static final Logger LOG = LoggerFactory.getLogger(SnapshotBackedReadWriteTransaction.class); + + SnapshotBackedReadWriteTransaction(final T identifier, final boolean debug, + final DataTreeSnapshot snapshot, final TransactionReadyPrototype readyImpl) { + super(identifier, debug, snapshot, readyImpl); + } + + @Override + public CheckedFuture>, ReadFailedException> read(final YangInstanceIdentifier path) { + LOG.debug("Tx: {} Read: {}", getIdentifier(), path); + checkNotNull(path, "Path must not be null."); + + final Optional> result; + try { + result = readSnapshotNode(path); + } catch (Exception e) { + LOG.error("Tx: {} Failed Read of {}", getIdentifier(), path, e); + return Futures.immediateFailedCheckedFuture(new ReadFailedException("Read failed", e)); + } + + if (result == null) { + return Futures.immediateFailedCheckedFuture(new ReadFailedException("Transaction is closed")); + } else { + return Futures.immediateCheckedFuture(result); + } + } + + @Override + public CheckedFuture exists(final YangInstanceIdentifier path) { + try { + return Futures.immediateCheckedFuture( + read(path).checkedGet().isPresent()); + } catch (ReadFailedException e) { + return Futures.immediateFailedCheckedFuture(e); + } + } +}