2 * Copyright (c) 2015 Brocade Communications 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.raft.persisted;
10 import com.google.common.collect.ImmutableList;
11 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
12 import java.io.ByteArrayOutputStream;
13 import java.io.Externalizable;
14 import java.io.IOException;
15 import java.io.ObjectInput;
16 import java.io.ObjectOutput;
17 import java.io.ObjectOutputStream;
18 import java.io.Serializable;
19 import java.util.ArrayList;
20 import java.util.List;
21 import org.eclipse.jdt.annotation.NonNull;
22 import org.opendaylight.controller.cluster.raft.protobuff.client.messages.Payload;
23 import org.opendaylight.controller.cluster.raft.protobuff.client.messages.PersistentPayload;
24 import org.slf4j.Logger;
25 import org.slf4j.LoggerFactory;
28 * Payload data for server configuration log entries.
30 * @author Thomas Pantelis
32 public final class ServerConfigurationPayload extends Payload implements PersistentPayload, Serializable {
33 private static final class Proxy implements Externalizable {
34 private static final long serialVersionUID = 1L;
36 private List<ServerInfo> serverConfig;
38 // checkstyle flags the public modifier as redundant which really doesn't make sense since it clearly isn't
39 // redundant. It is explicitly needed for Java serialization to be able to create instances via reflection.
40 @SuppressWarnings("checkstyle:RedundantModifier")
45 Proxy(final ServerConfigurationPayload payload) {
46 this.serverConfig = payload.getServerConfig();
50 public void writeExternal(final ObjectOutput out) throws IOException {
51 out.writeInt(serverConfig.size());
52 for (ServerInfo i : serverConfig) {
53 out.writeObject(i.getId());
54 out.writeBoolean(i.isVoting());
59 public void readExternal(final ObjectInput in) throws IOException, ClassNotFoundException {
60 final int size = in.readInt();
61 serverConfig = new ArrayList<>(size);
62 for (int i = 0; i < size; ++i) {
63 final String id = (String) in.readObject();
64 final boolean voting = in.readBoolean();
65 serverConfig.add(new ServerInfo(id, voting));
69 private Object readResolve() {
70 return new ServerConfigurationPayload(serverConfig);
74 private static final Logger LOG = LoggerFactory.getLogger(ServerConfigurationPayload.class);
75 private static final long serialVersionUID = 1L;
77 @SuppressFBWarnings(value = "SE_BAD_FIELD", justification = "This field is not Serializable but this class "
78 + "implements writeReplace to delegate serialization to a Proxy class and thus instances of this class "
79 + "aren't serialized. FindBugs does not recognize this.")
80 private final List<ServerInfo> serverConfig;
81 private int serializedSize = -1;
83 public ServerConfigurationPayload(final @NonNull List<ServerInfo> serverConfig) {
84 this.serverConfig = ImmutableList.copyOf(serverConfig);
87 public @NonNull List<ServerInfo> getServerConfig() {
93 if (serializedSize < 0) {
94 try (ByteArrayOutputStream bos = new ByteArrayOutputStream()) {
95 try (ObjectOutputStream out = new ObjectOutputStream(bos)) {
96 out.writeObject(writeReplace());
99 serializedSize = bos.toByteArray().length;
100 } catch (IOException e) {
102 LOG.error("Error serializing", e);
106 return serializedSize;
110 public int hashCode() {
111 return serverConfig.hashCode();
115 public boolean equals(Object obj) {
124 if (getClass() != obj.getClass()) {
128 ServerConfigurationPayload other = (ServerConfigurationPayload) obj;
129 return serverConfig.equals(other.serverConfig);
133 public String toString() {
134 return "ServerConfigurationPayload [serverConfig=" + serverConfig + "]";
137 private Object writeReplace() {
138 return new Proxy(this);