MySQL Binlog 日志监听与 Spring 集成实战场景

[mysqld]
binlog_format=mixed

show variables like '%log_bin%'

CREATE TABLE `t_user` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `userName` varchar(100) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8mb4;

INSERT INTO `test2023`.`t_user` (`id`, `userName`)
VALUES
    (
        "10086",
        "用心记录技术，走心分享，始于后端，不止于后端，励志成为一名优秀的全栈架构师，真正的实现码中致富。"
    );

UPDATE `test2023`.`t_user`
SET `id` = '10086',
 `userName` = '我的修改数据！！！'
WHERE
	(`id` = '10086');

DELETE
FROM
	t_user
WHERE
	id = '10086';

<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-jpa</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.48</version> <!-- 查看最新版本 -->
		</dependency>
		<dependency>
			<groupId>com.github.shyiko</groupId>
			<artifactId>mysql-binlog-connector-java</artifactId>
			<version>0.21.0</version>
		</dependency>

package com.example.demo.listener;
import com.github.shyiko.mysql.binlog.BinaryLogClient;
import com.github.shyiko.mysql.binlog.event.Event;
import com.github.shyiko.mysql.binlog.event.EventData;
import com.github.shyiko.mysql.binlog.event.QueryEventData;
import com.github.shyiko.mysql.binlog.event.TableMapEventData;
import com.github.shyiko.mysql.binlog.event.WriteRowsEventData;
import com.github.shyiko.mysql.binlog.event.deserialization.EventDeserializer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.naming.AuthenticationException;
import java.io.IOException;
import java.io.Serializable;
import java.util.List;
import java.util.concurrent.TimeoutException;
public class BinlogListenerMixed {
    private static final Logger logger = LoggerFactory.getLogger(BinlogListenerMixed.class);
    private static final String MYSQL_HOST = "8.130.74.105";
    private static final int MYSQL_PORT = 3306;
    private static final String MYSQL_USERNAME = "root";
    private static final String MYSQL_PASSWORD = "zhang.ting.123";
    public static void main(String[] args) {
        try {
            BinaryLogClient client = new BinaryLogClient(MYSQL_HOST, MYSQL_PORT, MYSQL_USERNAME, MYSQL_PASSWORD);
//            client.setBinlogFilename(null);
//            client.setBinlogPosition(-1); // 或者设置为其他适当的初始位置
//            client.setServerId(1);
//            client.setBinlogFilename("mysql-bin.000005");
//            client.setBinlogPosition(154);
            EventDeserializer eventDeserializer = new EventDeserializer();
            eventDeserializer.setCompatibilityMode(
                    EventDeserializer.CompatibilityMode.DATE_AND_TIME_AS_LONG,
                    EventDeserializer.CompatibilityMode.CHAR_AND_BINARY_AS_BYTE_ARRAY
            );
            logger.info("使用主机={}, 端口={}, 用户名={}, 密码={} 连接到 MySQL", MYSQL_HOST, MYSQL_PORT, MYSQL_USERNAME, MYSQL_PASSWORD);
            client.setEventDeserializer(eventDeserializer);
            client.registerEventListener(BinlogListenerMixed::handleEvent);
            client.registerLifecycleListener(new BinaryLogClient.LifecycleListener() {
                @Override
                public void onConnect(BinaryLogClient client) {
                    logger.info("Connected to MySQL server");
                }
                @Override
                public void onCommunicationFailure(BinaryLogClient client, Exception ex) {
                    logger.error("Communication failure with MySQL server", ex);
                }
                @Override
                public void onEventDeserializationFailure(BinaryLogClient client, Exception ex) {
                    logger.error("Event deserialization failure", ex);
                }
                @Override
                public void onDisconnect(BinaryLogClient client) {
                    logger.warn("Disconnected from MySQL server");
                    // 在这里添加重新连接或其他处理逻辑
                }
            });
            client.connect();
        } catch (IOException e) {
            logger.error("@@ 连接到 MySQL 时发生错误", e);
            logger.error("@@ Error connecting to MySQL", e);
        }
    }
    private static void handleEvent(Event event) {
        logger.info("@@ 打印 event: {}", event);
        logger.info("@@ Received event type: {}", event.getHeader().getEventType());
        switch (event.getHeader().getEventType()) {
            case WRITE_ROWS:
            case EXT_WRITE_ROWS:
                handleWriteRowsEvent((WriteRowsEventData) event.getData());
                break;
            case QUERY:
                handleQueryEvent((QueryEventData) event.getData());
                break;
            case TABLE_MAP:
                handleTableMapEvent((TableMapEventData) event.getData());
                break;
            // 其他事件处理...
        }
    }
    private static void handleWriteRowsEvent(WriteRowsEventData eventData) {
        List<Serializable[]> rows = eventData.getRows();
        // 获取表名
        String tableName = getTableName(eventData);
        // 处理每一行数据
        for (Serializable[] row : rows) {
            // 根据需要调整以下代码以获取具体的列值
            String column1Value = row[0].toString();
            String column2Value = row[1].toString();
            // 将数据备份到另一个数据库
            backupToAnotherDatabase(tableName, column1Value, column2Value);
        }
    }
    private static void handleQueryEvent(QueryEventData eventData) {
        String sql = eventData.getSql();
        logger.info("@@ handleQueryEvent函数执行Query event SQL: {}", sql);
        // 解析SQL语句，根据需要处理
        // 例如，检查是否包含写入操作，然后执行相应的逻辑
    }
    private static void handleTableMapEvent(TableMapEventData eventData) {
        // 获取表映射信息，根据需要处理
        logger.info("@@ handleTableMapEvent函数执行TableMap event: {}", eventData);
    }
    private static String getTableName(EventData eventData) {
        // 获取表名的逻辑，可以使用TableMapEventData等信息
        // 根据实际情况实现
        return "example_table";
    }
    private static void backupToAnotherDatabase(String tableName, String column1Value, String column2Value) {
        // 将数据备份到另一个数据库的逻辑
        logger.info("Backup to another database: Table={}, Column1={}, Column2={}", tableName, column1Value, column2Value);
    }
}