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 {
31 private final DataTreeSnapshot snapshot;
33 LocalReadOnlyProxyTransaction(final ProxyHistory parent, final TransactionIdentifier identifier,
34 final DataTreeSnapshot snapshot) {
35 super(parent, identifier, false);
36 this.snapshot = requireNonNull(snapshot);
39 LocalReadOnlyProxyTransaction(final ProxyHistory parent, final TransactionIdentifier identifier) {
40 super(parent, identifier, true);
41 // It is an error to touch snapshot once we are DONE
46 boolean isSnapshotOnly() {
51 DataTreeSnapshot readOnlyView() {
52 return checkNotNull(snapshot, "Transaction %s is DONE", getIdentifier());
56 void doDelete(final YangInstanceIdentifier path) {
57 throw new UnsupportedOperationException("doDelete");
61 void doMerge(final YangInstanceIdentifier path, final NormalizedNode data) {
62 throw new UnsupportedOperationException("doMerge");
66 void doWrite(final YangInstanceIdentifier path, final NormalizedNode data) {
67 throw new UnsupportedOperationException("doWrite");
71 CommitLocalTransactionRequest commitRequest(final boolean coordinated) {
72 throw new UnsupportedOperationException("commitRequest");
76 Optional<ModifyTransactionRequest> flushState() {
78 return Optional.empty();
82 void applyForwardedModifyTransactionRequest(final ModifyTransactionRequest request,
83 final Consumer<Response<?, ?>> callback) {
84 commonModifyTransactionRequest(request);
89 void replayModifyTransactionRequest(final ModifyTransactionRequest request,
90 final Consumer<Response<?, ?>> callback, final long enqueuedTicks) {
91 commonModifyTransactionRequest(request);
92 enqueueAbort(callback, enqueuedTicks);
95 private static void commonModifyTransactionRequest(final ModifyTransactionRequest request) {
96 verify(request.getModifications().isEmpty());
98 final PersistenceProtocol protocol = request.getPersistenceProtocol().get();
99 verify(protocol == PersistenceProtocol.ABORT);