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.access.commands;
10 import static com.google.common.base.Preconditions.checkArgument;
11 import static java.util.Objects.requireNonNull;
13 import akka.actor.ActorRef;
14 import akka.actor.ActorSelection;
15 import com.google.common.base.MoreObjects.ToStringHelper;
16 import com.google.common.collect.ImmutableList;
17 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
18 import java.util.List;
19 import java.util.Optional;
20 import org.eclipse.jdt.annotation.NonNull;
21 import org.opendaylight.controller.cluster.access.ABIVersion;
22 import org.opendaylight.controller.cluster.access.concepts.ClientIdentifier;
23 import org.opendaylight.controller.cluster.access.concepts.RequestSuccess;
24 import org.opendaylight.yangtools.yang.data.tree.api.ReadOnlyDataTree;
27 * Successful reply to an {@link ConnectClientRequest}. Client actor which initiated this connection should use
28 * the version reported via {@link #getVersion()} of this message to communicate with this backend. Should this backend
29 * fail, the client can try accessing the provided alternates.
31 public final class ConnectClientSuccess extends RequestSuccess<ClientIdentifier, ConnectClientSuccess> {
32 private static final long serialVersionUID = 1L;
34 private final @NonNull ImmutableList<ActorSelection> alternates;
36 @SuppressFBWarnings(value = "SE_BAD_FIELD", justification = "See justification above.")
37 private final ReadOnlyDataTree dataTree;
38 private final @NonNull ActorRef backend;
39 private final int maxMessages;
41 ConnectClientSuccess(final ClientIdentifier target, final long sequence, final ActorRef backend,
42 final List<ActorSelection> alternates, final int maxMessages, final ReadOnlyDataTree dataTree) {
43 super(target, sequence);
44 this.backend = requireNonNull(backend);
45 this.alternates = ImmutableList.copyOf(alternates);
46 this.dataTree = dataTree;
47 checkArgument(maxMessages > 0, "Maximum messages has to be positive, not %s", maxMessages);
48 this.maxMessages = maxMessages;
51 public ConnectClientSuccess(final @NonNull ClientIdentifier target, final long sequence,
52 final @NonNull ActorRef backend, final @NonNull List<ActorSelection> alternates,
53 final @NonNull ReadOnlyDataTree dataTree, final int maxMessages) {
54 this(target, sequence, backend, alternates, maxMessages, requireNonNull(dataTree));
58 * Return the list of known alternate backends. The client can use this list to perform recovery procedures.
60 * @return a list of known backend alternates
62 public @NonNull List<ActorSelection> getAlternates() {
66 public @NonNull ActorRef getBackend() {
70 public Optional<ReadOnlyDataTree> getDataTree() {
71 return Optional.ofNullable(dataTree);
74 public int getMaxMessages() {
79 protected ConnectClientSuccessProxyV1 externalizableProxy(final ABIVersion version) {
80 return new ConnectClientSuccessProxyV1(this);
84 protected ConnectClientSuccess cloneAsVersion(final ABIVersion version) {
89 protected ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
90 return super.addToStringAttributes(toStringHelper).add("alternates", alternates)
91 .add("dataTree present", getDataTree().isPresent()).add("maxMessages", maxMessages);