2 * Copyright (c) 2016 Cisco Systems, 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.controller.cluster.databroker.actors.dds;
10 import static com.google.common.base.Preconditions.checkNotNull;
11 import static com.google.common.base.Verify.verify;
12 import static java.util.Objects.requireNonNull;
14 import java.util.Optional;
15 import java.util.function.Consumer;
16 import org.opendaylight.controller.cluster.access.commands.CommitLocalTransactionRequest;
17 import org.opendaylight.controller.cluster.access.commands.ModifyTransactionRequest;
18 import org.opendaylight.controller.cluster.access.commands.PersistenceProtocol;
19 import org.opendaylight.controller.cluster.access.concepts.Response;
20 import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
21 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
22 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
23 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshot;
26 * A read-only specialization of {@link LocalProxyTransaction}. This class is NOT thread-safe.
28 * @author Robert Varga
30 final class LocalReadOnlyProxyTransaction extends LocalProxyTransaction {
32 private final DataTreeSnapshot snapshot;
34 LocalReadOnlyProxyTransaction(final ProxyHistory parent, final TransactionIdentifier identifier,
35 final DataTreeSnapshot snapshot) {
36 super(parent, identifier, false);
37 this.snapshot = requireNonNull(snapshot);
40 LocalReadOnlyProxyTransaction(final ProxyHistory parent, final TransactionIdentifier identifier) {
41 super(parent, identifier, true);
42 // It is an error to touch snapshot once we are DONE
47 boolean isSnapshotOnly() {
52 DataTreeSnapshot readOnlyView() {
53 return checkNotNull(snapshot, "Transaction %s is DONE", getIdentifier());
57 void doDelete(final YangInstanceIdentifier path) {
58 throw new UnsupportedOperationException("doDelete");
62 void doMerge(final YangInstanceIdentifier path, final NormalizedNode<?, ?> data) {
63 throw new UnsupportedOperationException("doMerge");
67 void doWrite(final YangInstanceIdentifier path, final NormalizedNode<?, ?> data) {
68 throw new UnsupportedOperationException("doWrite");
72 CommitLocalTransactionRequest commitRequest(final boolean coordinated) {
73 throw new UnsupportedOperationException("commitRequest");
77 Optional<ModifyTransactionRequest> flushState() {
79 return Optional.empty();
83 void applyForwardedModifyTransactionRequest(final ModifyTransactionRequest request,
84 final Consumer<Response<?, ?>> callback) {
85 commonModifyTransactionRequest(request);
90 void replayModifyTransactionRequest(final ModifyTransactionRequest request,
91 final Consumer<Response<?, ?>> callback, final long enqueuedTicks) {
92 commonModifyTransactionRequest(request);
93 enqueueAbort(callback, enqueuedTicks);
96 private static void commonModifyTransactionRequest(final ModifyTransactionRequest request) {
97 verify(request.getModifications().isEmpty());
99 final PersistenceProtocol protocol = request.getPersistenceProtocol().get();
100 verify(protocol == PersistenceProtocol.ABORT);