<JDBC name="DBLogger" tableName="db_logs" ignoreExceptions="false">
    <DriverManager
         connectionString="jdbc:mysql://localhost:3306/twib"
         userName="****"
         password="****"
         driverClassName="com.mysql.jdbc.Driver"
         />

    <ColumnMapping name="date_time" pattern="%d{UNIX_MILLIS}" />
    <ColumnMapping name="user_id" />
    <ColumnMapping name="session_id" />
    <ColumnMapping name="user_ip" />
    <ColumnMapping name="user_agent" />
    <ColumnMapping name="device_info" />
    <ColumnMapping name="device_id" />
    <ColumnMapping name="device_mac" />
    <ColumnMapping name="device_imei" />
    <ColumnMapping name="device_imsi" />
    <ColumnMapping name="request_name" />
    <ColumnMapping name="request_xml" />
    <ColumnMapping name="response_xml" />
    <MessageLayout />
</JDBC>

//get logger instance
Logger dbLogger = LogManager.getLogger("DBLogger");
//create map for map message
HashMap map = new HashMap();
//fill in map with values
map.put("user_id", "...");
//...here go other map fields
map.put("response_xml", "...");
//log the map message with logger to DB
dbLogger.debug(new MapMessage(map));

<ColumnMapping name="user_id" />

<ColumnMapping name="user_id" pattern="%K{user_id}"/>