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 com.google.common.base.Preconditions;
11 import com.google.common.base.Verify;
12 import java.util.function.Consumer;
13 import javax.annotation.concurrent.NotThreadSafe;
14 import org.opendaylight.controller.cluster.access.commands.CommitLocalTransactionRequest;
15 import org.opendaylight.controller.cluster.access.commands.ModifyTransactionRequest;
16 import org.opendaylight.controller.cluster.access.commands.PersistenceProtocol;
17 import org.opendaylight.controller.cluster.access.concepts.Response;
18 import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
19 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
20 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
21 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshot;
24 * A read-only specialization of {@link LocalProxyTransaction}.
26 * @author Robert Varga
29 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 = Preconditions.checkNotNull(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 Preconditions.checkNotNull(snapshot, "Transaction %s is DONE", getIdentifier());
56 void doDelete(final YangInstanceIdentifier path) {
57 throw new UnsupportedOperationException("Read-only snapshot");
61 void doMerge(final YangInstanceIdentifier path, final NormalizedNode<?, ?> data) {
62 throw new UnsupportedOperationException("Read-only snapshot");
66 void doWrite(final YangInstanceIdentifier path, final NormalizedNode<?, ?> data) {
67 throw new UnsupportedOperationException("Read-only snapshot");
71 CommitLocalTransactionRequest commitRequest(final boolean coordinated) {
72 throw new UnsupportedOperationException("Read-only snapshot");
81 void flushState(final AbstractProxyTransaction successor) {
86 void applyForwardedModifyTransactionRequest(final ModifyTransactionRequest request,
87 final Consumer<Response<?, ?>> callback) {
88 commonModifyTransactionRequest(request);
93 void replayModifyTransactionRequest(final ModifyTransactionRequest request,
94 final Consumer<Response<?, ?>> callback, final long enqueuedTicks) {
95 commonModifyTransactionRequest(request);
96 enqueueAbort(callback, enqueuedTicks);
99 private static void commonModifyTransactionRequest(final ModifyTransactionRequest request) {
100 Verify.verify(request.getModifications().isEmpty());
102 final PersistenceProtocol protocol = request.getPersistenceProtocol().get();
103 Verify.verify(protocol == PersistenceProtocol.ABORT);