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mysqldb.py
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381 lines (323 loc) · 9.95 KB
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# -*- coding: utf-8 -*-
"""
Created on 2016-11-16 16:25
---------
@summary: 操作mysql数据库
---------
@author: Boris
@email: boris_liu@foxmail.com
"""
import datetime
import json
from urllib import parse
from typing import List, Dict
import pymysql
from dbutils.pooled_db import PooledDB
from pymysql import cursors
from pymysql import err
import feapder.setting as setting
from feapder.utils.log import log
from feapder.utils.tools import make_insert_sql, make_batch_sql, make_update_sql
def auto_retry(func):
def wapper(*args, **kwargs):
for i in range(3):
try:
return func(*args, **kwargs)
except (err.InterfaceError, err.OperationalError) as e:
log.error(
"""
error:%s
sql: %s
"""
% (e, kwargs.get("sql") or args[1])
)
return wapper
class MysqlDB:
def __init__(
self, ip=None, port=None, db=None, user_name=None, user_pass=None, **kwargs
):
# 可能会改setting中的值，所以此处不能直接赋值为默认值，需要后加载赋值
if not ip:
ip = setting.MYSQL_IP
if not port:
port = setting.MYSQL_PORT
if not db:
db = setting.MYSQL_DB
if not user_name:
user_name = setting.MYSQL_USER_NAME
if not user_pass:
user_pass = setting.MYSQL_USER_PASS
try:
self.connect_pool = PooledDB(
creator=pymysql,
mincached=1,
maxcached=100,
maxconnections=100,
blocking=True,
ping=7,
host=ip,
port=port,
user=user_name,
passwd=user_pass,
db=db,
charset="utf8mb4",
cursorclass=cursors.SSCursor,
) # cursorclass 使用服务的游标，默认的在多线程下大批量插入数据会使内存递增
except Exception as e:
log.error(
"""
连接失败：
ip: {}
port: {}
db: {}
user_name: {}
user_pass: {}
exception: {}
""".format(
ip, port, db, user_name, user_pass, e
)
)
else:
log.debug("连接到mysql数据库 %s : %s" % (ip, db))
@classmethod
def from_url(cls, url, **kwargs):
# mysql://username:password@ip:port/db?charset=utf8mb4
url_parsed = parse.urlparse(url)
db_type = url_parsed.scheme.strip()
if db_type != "mysql":
raise Exception(
"url error, expect mysql://username:ip:port/db?charset=utf8mb4, but get {}".format(
url
)
)
connect_params = {
"ip": url_parsed.hostname.strip(),
"port": url_parsed.port,
"user_name": url_parsed.username.strip(),
"user_pass": url_parsed.password.strip(),
"db": url_parsed.path.strip("/").strip(),
}
connect_params.update(kwargs)
return cls(**connect_params)
@staticmethod
def unescape_string(value):
if not isinstance(value, str):
return value
value = value.replace("\\0", "\0")
value = value.replace("\\\\", "\\")
value = value.replace("\\n", "\n")
value = value.replace("\\r", "\r")
value = value.replace("\\Z", "\032")
value = value.replace('\\"', '"')
value = value.replace("\\'", "'")
return value
def get_connection(self):
conn = self.connect_pool.connection(shareable=False)
# cursor = conn.cursor(cursors.SSCursor)
cursor = conn.cursor()
return conn, cursor
def close_connection(self, conn, cursor):
cursor.close()
conn.close()
def size_of_connections(self):
"""
当前活跃的连接数
@return:
"""
return self.connect_pool._connections
def size_of_connect_pool(self):
"""
池子里一共有多少连接
@return:
"""
return len(self.connect_pool._idle_cache)
@auto_retry
def find(self, sql, limit=0, to_json=False):
"""
@summary:
无数据： 返回()
有数据： 若limit == 1 则返回 (data1, data2)
否则返回 ((data1, data2),)
---------
@param sql:
@param limit:
@param to_json 是否将查询结果转为json
---------
@result:
"""
conn, cursor = self.get_connection()
cursor.execute(sql)
if limit == 1:
result = cursor.fetchone() # 全部查出来，截取 不推荐使用
elif limit > 1:
result = cursor.fetchmany(limit) # 全部查出来，截取 不推荐使用
else:
result = cursor.fetchall()
if to_json:
columns = [i[0] for i in cursor.description]
# 处理数据
def convert(col):
if isinstance(col, (datetime.date, datetime.time)):
return str(col)
elif isinstance(col, str) and (
col.startswith("{") or col.startswith("[")
):
try:
# col = self.unescape_string(col)
return json.loads(col)
except:
return col
else:
# col = self.unescape_string(col)
return col
if limit == 1:
result = [convert(col) for col in result]
result = dict(zip(columns, result))
else:
result = [[convert(col) for col in row] for row in result]
result = [dict(zip(columns, r)) for r in result]
self.close_connection(conn, cursor)
return result
def add(self, sql, exception_callfunc=None):
"""
Args:
sql:
exception_callfunc: 异常回调
Returns: 添加行数
"""
affect_count = None
try:
conn, cursor = self.get_connection()
affect_count = cursor.execute(sql)
conn.commit()
except Exception as e:
log.error(
"""
error:%s
sql: %s
"""
% (e, sql)
)
if exception_callfunc:
exception_callfunc(e)
finally:
self.close_connection(conn, cursor)
return affect_count
def add_smart(self, table, data: Dict, **kwargs):
"""
添加数据, 直接传递json格式的数据，不用拼sql
Args:
table: 表名
data: 字典 {"xxx":"xxx"}
**kwargs:
Returns: 添加行数
"""
sql = make_insert_sql(table, data, **kwargs)
return self.add(sql)
def add_batch(self, sql, datas: List[Dict]):
"""
@summary: 批量添加数据
---------
@ param sql: insert ignore into (xxx,xxx) values (%s, %s, %s)
# param datas: 列表 [{}, {}, {}]
---------
@result: 添加行数
"""
affect_count = None
try:
conn, cursor = self.get_connection()
affect_count = cursor.executemany(sql, datas)
conn.commit()
except Exception as e:
log.error(
"""
error:%s
sql: %s
"""
% (e, sql)
)
finally:
self.close_connection(conn, cursor)
return affect_count
def add_batch_smart(self, table, datas: List[Dict], **kwargs):
"""
批量添加数据, 直接传递list格式的数据，不用拼sql
Args:
table: 表名
datas: 列表 [{}, {}, {}]
**kwargs:
Returns: 添加行数
"""
sql, datas = make_batch_sql(table, datas, **kwargs)
return self.add_batch(sql, datas)
def update(self, sql):
try:
conn, cursor = self.get_connection()
cursor.execute(sql)
conn.commit()
except Exception as e:
log.error(
"""
error:%s
sql: %s
"""
% (e, sql)
)
return False
else:
return True
finally:
self.close_connection(conn, cursor)
def update_smart(self, table, data: Dict, condition):
"""
更新, 不用拼sql
Args:
table: 表名
data: 数据 {"xxx":"xxx"}
condition: 更新条件 where后面的条件，如 condition='status=1'
Returns: True / False
"""
sql = make_update_sql(table, data, condition)
return self.update(sql)
def delete(self, sql):
"""
删除
Args:
sql:
Returns: True / False
"""
try:
conn, cursor = self.get_connection()
cursor.execute(sql)
conn.commit()
except Exception as e:
log.error(
"""
error:%s
sql: %s
"""
% (e, sql)
)
return False
else:
return True
finally:
self.close_connection(conn, cursor)
def execute(self, sql):
try:
conn, cursor = self.get_connection()
cursor.execute(sql)
conn.commit()
except Exception as e:
log.error(
"""
error:%s
sql: %s
"""
% (e, sql)
)
return False
else:
return True
finally:
self.close_connection(conn, cursor)