2 * Copyright (c) 2022 PANTHEON.tech, s.r.o. 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.messages;
10 import static com.google.common.base.Verify.verifyNotNull;
11 import static java.util.Objects.requireNonNull;
13 import java.io.Externalizable;
14 import java.io.IOException;
15 import java.io.ObjectInput;
16 import java.io.ObjectOutput;
17 import org.opendaylight.controller.cluster.raft.RaftVersions;
18 import org.opendaylight.yangtools.concepts.WritableObjects;
21 * Serialization proxy for {@link AppendEntriesReply}.
23 final class AR implements Externalizable {
25 private static final long serialVersionUID = 1L;
28 private static final int SUCCESS = 0x10;
29 private static final int FORCE_INSTALL_SNAPSHOT = 0x20;
30 private static final int NEEDS_LEADER_ADDRESS = 0x40;
32 private AppendEntriesReply appendEntriesReply;
34 @SuppressWarnings("checkstyle:RedundantModifier")
39 AR(final AppendEntriesReply appendEntriesReply) {
40 this.appendEntriesReply = requireNonNull(appendEntriesReply);
44 public void writeExternal(final ObjectOutput out) throws IOException {
45 out.writeShort(appendEntriesReply.getRaftVersion());
48 if (appendEntriesReply.isSuccess()) {
51 if (appendEntriesReply.isForceInstallSnapshot()) {
52 flags |= FORCE_INSTALL_SNAPSHOT;
54 if (appendEntriesReply.isNeedsLeaderAddress()) {
55 flags |= NEEDS_LEADER_ADDRESS;
57 WritableObjects.writeLong(out, appendEntriesReply.getTerm(), flags);
59 out.writeObject(appendEntriesReply.getFollowerId());
61 WritableObjects.writeLongs(out, appendEntriesReply.getLogLastIndex(), appendEntriesReply.getLogLastTerm());
63 out.writeShort(appendEntriesReply.getPayloadVersion());
67 public void readExternal(final ObjectInput in) throws IOException, ClassNotFoundException {
68 short raftVersion = in.readShort();
70 byte hdr = WritableObjects.readLongHeader(in);
71 final int flags = WritableObjects.longHeaderFlags(hdr);
73 long term = WritableObjects.readLongBody(in, hdr);
74 String followerId = (String) in.readObject();
76 hdr = WritableObjects.readLongHeader(in);
77 long logLastIndex = WritableObjects.readFirstLong(in, hdr);
78 long logLastTerm = WritableObjects.readSecondLong(in, hdr);
80 short payloadVersion = in.readShort();
82 appendEntriesReply = new AppendEntriesReply(followerId, term, getFlag(flags, SUCCESS), logLastIndex,
83 logLastTerm, payloadVersion, getFlag(flags, FORCE_INSTALL_SNAPSHOT), getFlag(flags, NEEDS_LEADER_ADDRESS),
84 raftVersion, RaftVersions.CURRENT_VERSION);
88 private Object readResolve() {
89 return verifyNotNull(appendEntriesReply);
92 private static boolean getFlag(final int flags, final int bit) {
93 return (flags & bit) != 0;