pymysqlreplication


#!/usr/bin/env python3
# _*_ coding:utf8 _*_
from pymysqlreplication import BinLogStreamReader
from pymysqlreplication.row_event import (DeleteRowsEvent,UpdateRowsEvent,WriteRowsEvent,)
MYSQL_SETTINGS = { "host": "127.0.0.1", "port": 3306, "user": "root", "passwd": "123456"}

def main():
    stream = BinLogStreamReader(connection_settings=MYSQL_SETTINGS,server_id=5, blocking=True,
                                only_events=[DeleteRowsEvent, WriteRowsEvent, UpdateRowsEvent])
    try:
        for binlogevent in stream:
            for row in binlogevent.rows:
                if isinstance(binlogevent, DeleteRowsEvent):
                    info = dict(row["values"].items())
                    ##如果有主键
                    print("DELETE FROM `%s`.`%s` WHERE %s = %s ;" %(binlogevent.schema ,binlogevent.table,binlogevent.primary_key,info[binlogevent.primary_key]) )
                elif isinstance(binlogevent, UpdateRowsEvent):
                    info_before = dict(row["before_values"].items())
                    info_after = dict(row["after_values"].items())
                    info_set = str(info_after).replace(":","=").replace("{","").replace("}","")
                    print("UPDATE `%s`.`%s` SET %s WHERE %s = %s ;"%(binlogevent.schema,binlogevent.table,info_set,binlogevent.primary_key,info_before[binlogevent.primary_key]   )  )
                elif isinstance(binlogevent, WriteRowsEvent):
                    info = dict(row["values"].items())
                    print("INSERT INTO %s.%s(%s)VALUES%s ;"%(binlogevent.schema,binlogevent.table , ','.join(info.keys()) ,str(tuple(info.values()))  )  )
    except Exception, e:
        print(e)
    finally:
        stream.close()
if __name__ == "__main__":
    main()

'''
BinLogStreamReader()参数
ctl_connection_settings:集群保存模式信息的连接设置
resume_stream:从位置或binlog的最新事件或旧的可用事件开始
log_file:设置复制开始日志文件
log_pos:设置复制开始日志pos(resume_stream应该为true)
auto_position:使用master_auto_position gtid设置位置
blocking:在流上读取被阻止

only_events:允许的事件数组
ignored_events:被忽略的事件数组

only_tables:包含要观看的表的数组(仅适用于binlog_format ROW)
ignored_tables:包含要跳过的表的数组

only_schemas:包含要观看的模式的数组
ignored_schemas:包含要跳过的模式的数组

freeze_schema:如果为true,则不支持ALTER TABLE。速度更快。
skip_to_timestamp:在达到指定的时间戳之前忽略所有事件。
report_slave:在SHOW SLAVE HOSTS中报告奴隶。
slave_uuid:在SHOW SLAVE HOSTS中报告slave_uuid。
fail_on_table_metadata_unavailable:如果我们无法获取有关row_events的表信息,应该引发异常
slave_heartbeat:(秒)主站应主动发送心跳连接。这也减少了复制恢复时GTID复制的流量(在许多事件在binlog中跳过的情况下)。请参阅mysql文档中的MASTER_HEARTBEAT_PERIOD以了解语义
'''

 



posted on 2018-05-03 13:39  AF陈  阅读(1088)  评论(0编辑  收藏  举报

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