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.AbortLocalTransactionRequest;
15 import org.opendaylight.controller.cluster.access.commands.CommitLocalTransactionRequest;
16 import org.opendaylight.controller.cluster.access.commands.ModifyTransactionRequest;
17 import org.opendaylight.controller.cluster.access.commands.PersistenceProtocol;
18 import org.opendaylight.controller.cluster.access.commands.TransactionRequest;
19 import org.opendaylight.controller.cluster.access.concepts.Response;
20 import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
21 import org.opendaylight.controller.cluster.datastore.util.AbstractDataTreeModificationCursor;
22 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
23 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
24 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
25 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
26 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshot;
27 import org.slf4j.Logger;
28 import org.slf4j.LoggerFactory;
31 * A read-only specialization of {@link LocalProxyTransaction}.
33 * @author Robert Varga
36 final class LocalReadOnlyProxyTransaction extends LocalProxyTransaction {
37 private static final Logger LOG = LoggerFactory.getLogger(LocalReadOnlyProxyTransaction.class);
39 private final DataTreeSnapshot snapshot;
41 LocalReadOnlyProxyTransaction(final ProxyHistory parent, final TransactionIdentifier identifier,
42 final DataTreeSnapshot snapshot) {
43 super(parent, identifier);
44 this.snapshot = Preconditions.checkNotNull(snapshot);
48 boolean isSnapshotOnly() {
53 DataTreeSnapshot readOnlyView() {
58 void doDelete(final YangInstanceIdentifier path) {
59 throw new UnsupportedOperationException("Read-only snapshot");
63 void doMerge(final YangInstanceIdentifier path, final NormalizedNode<?, ?> data) {
64 throw new UnsupportedOperationException("Read-only snapshot");
68 void doWrite(final YangInstanceIdentifier path, final NormalizedNode<?, ?> data) {
69 throw new UnsupportedOperationException("Read-only snapshot");
73 CommitLocalTransactionRequest commitRequest(final boolean coordinated) {
74 throw new UnsupportedOperationException("Read-only snapshot");
83 void flushState(final AbstractProxyTransaction successor) {
88 void applyModifyTransactionRequest(final ModifyTransactionRequest request,
89 final Consumer<Response<?, ?>> callback) {
90 Verify.verify(request.getModifications().isEmpty());
92 final PersistenceProtocol protocol = request.getPersistenceProtocol().get();
93 Verify.verify(protocol == PersistenceProtocol.ABORT);
98 void forwardToRemote(final RemoteProxyTransaction successor, final TransactionRequest<?> request,
99 final Consumer<Response<?, ?>> callback) {
100 if (request instanceof CommitLocalTransactionRequest) {
101 final CommitLocalTransactionRequest req = (CommitLocalTransactionRequest) request;
102 final DataTreeModification mod = req.getModification();
104 LOG.debug("Applying modification {} to successor {}", mod, successor);
105 mod.applyToCursor(new AbstractDataTreeModificationCursor() {
107 public void write(final PathArgument child, final NormalizedNode<?, ?> data) {
108 successor.write(current().node(child), data);
112 public void merge(final PathArgument child, final NormalizedNode<?, ?> data) {
113 successor.merge(current().node(child), data);
117 public void delete(final PathArgument child) {
118 successor.delete(current().node(child));
122 successor.ensureSealed();
124 final ModifyTransactionRequest successorReq = successor.commitRequest(req.isCoordinated());
125 successor.sendRequest(successorReq, callback);
126 } else if (request instanceof AbortLocalTransactionRequest) {
127 LOG.debug("Forwarding abort {} to successor {}", request, successor);
130 throw new IllegalArgumentException("Unhandled request" + request);