1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.shardingsphere.db.protocol.mysql.packet.binlog;
19
20 import lombok.Getter;
21 import lombok.RequiredArgsConstructor;
22 import lombok.ToString;
23 import org.apache.shardingsphere.db.protocol.mysql.packet.MySQLPacket;
24 import org.apache.shardingsphere.db.protocol.mysql.payload.MySQLPacketPayload;
25
26 /**
27 * MySQL binlog event header.
28 *
29 * @see <a href="https://dev.mysql.com/doc/dev/mysql-server/latest/page_protocol_replication_binlog_event.html#sect_protocol_replication_binlog_event_header">Binlog Event header</a>
30 */
31 @RequiredArgsConstructor
32 @Getter
33 @ToString
34 public final class MySQLBinlogEventHeader extends MySQLPacket {
35
36 /**
37 * MySQL binlog event header length is 19 in binlog version 3 and 4.
38 */
39 public static final int MYSQL_BINLOG_EVENT_HEADER_LENGTH = 19;
40
41 private final int timestamp;
42
43 private final int eventType;
44
45 private final int serverId;
46
47 /**
48 * Size of the event (header, post-header, body).
49 */
50 private final int eventSize;
51
52 private final int logPos;
53
54 private final int flags;
55
56 private final int checksumLength;
57
58 public MySQLBinlogEventHeader(final MySQLPacketPayload payload, final int checksumLength) {
59 timestamp = payload.readInt4();
60 eventType = payload.readInt1();
61 serverId = payload.readInt4();
62 eventSize = payload.readInt4();
63 logPos = payload.readInt4();
64 flags = payload.readInt2();
65 this.checksumLength = checksumLength;
66 }
67
68 @Override
69 protected void write(final MySQLPacketPayload payload) {
70 payload.writeInt4(timestamp);
71 payload.writeInt1(eventType);
72 payload.writeInt4(serverId);
73 payload.writeInt4(eventSize);
74 payload.writeInt4(logPos);
75 payload.writeInt2(flags);
76 }
77 }