2 * Copyright (c) 2015 Red Hat, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.ovsdb.openstack.netvirt.impl;
10 import com.google.common.base.Optional;
11 import com.google.common.util.concurrent.CheckedFuture;
12 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
13 import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
14 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
15 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
16 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
17 import org.slf4j.Logger;
18 import org.slf4j.LoggerFactory;
21 * Utility class to wrap mdsal transactions.
23 * @author Sam Hague (shague@redhat.com)
25 public class MdsalUtils {
26 private static final Logger LOG = LoggerFactory.getLogger(MdsalUtils.class);
27 private static DataBroker databroker = null;
30 * Class constructor setting the data broker.
32 * @param dataBroker the {@link org.opendaylight.controller.md.sal.binding.api.DataBroker}
34 public MdsalUtils (DataBroker dataBroker) {
35 this.databroker = dataBroker;
39 * Executes read transaction as a test2.
41 * @param logicalDatastoreType {@link org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType} from which read should occur
42 * @param path {@link org.opendaylight.yangtools.yang.binding.InstanceIdentifier} for path to read
43 * @param <D> the data object type
44 * @return the data object requested
46 public static <D extends org.opendaylight.yangtools.yang.binding.DataObject> D readTransaction(
47 final LogicalDatastoreType logicalDatastoreType, final InstanceIdentifier<D> path) {
49 final ReadOnlyTransaction readTx = databroker.newReadOnlyTransaction();
50 Optional<D> optionalDataObject = Optional.absent();
51 CheckedFuture<Optional<D>, ReadFailedException> submitFuture = readTx.read(logicalDatastoreType, path);
53 optionalDataObject = submitFuture.checkedGet();
54 if (optionalDataObject.isPresent()) {
55 ret = optionalDataObject.get();
57 LOG.debug("{}: Failed to read {}",
58 Thread.currentThread().getStackTrace()[1], path);
60 } catch (ReadFailedException e) {
61 LOG.warn("Failed to read {} ", path, e);