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bugfix: ETL multiprocessing

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pull/1/head
Steve Nyemba 3 years ago
parent f672c04844
commit 105ff00224
3 changed files with 57 additions and 76 deletions
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34
bin/transport
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@ -75,10 +75,10 @@ class Post(Process):
_info = {"values":self.rows} if 'couch' in self.PROVIDER else self.rows _info = {"values":self.rows} if 'couch' in self.PROVIDER else self.rows
ltypes = self.rows.dtypes.values ltypes = self.rows.dtypes.values
columns = self.rows.dtypes.index.tolist() columns = self.rows.dtypes.index.tolist()
if not self.writer.has() : # if not self.writer.has() :
self.writer.make(fields=columns) # self.writer.make(fields=columns)
# self.log(module='write',action='make-table',input={"name":self.writer.table}) # self.log(module='write',action='make-table',input={"name":self.writer.table})
for name in columns : for name in columns :
if _info[name].dtype in ['int32','int64','int','float','float32','float64'] : if _info[name].dtype in ['int32','int64','int','float','float32','float64'] :
@ -86,7 +86,7 @@ class Post(Process):
else: else:
value = '' value = ''
_info[name] = _info[name].fillna(value) _info[name] = _info[name].fillna(value)
print (_info)
self.writer.write(_info) self.writer.write(_info)
self.writer.close() self.writer.close()
@ -94,6 +94,7 @@ class Post(Process):
class ETL (Process): class ETL (Process):
def __init__(self,**_args): def __init__(self,**_args):
super().__init__() super().__init__()
self.name = _args['id'] self.name = _args['id']
if 'provider' not in _args['source'] : if 'provider' not in _args['source'] :
#@deprecate #@deprecate
@ -133,18 +134,24 @@ class ETL (Process):
self.log(module='write',action='partitioning') self.log(module='write',action='partitioning')
rows = np.array_split(np.arange(idf.shape[0]),self.JOB_COUNT) rows = np.array_split(np.arange(0,idf.shape[0]),self.JOB_COUNT)
# #
# @TODO: locks # @TODO: locks
for i in rows : for i in np.arange(self.JOB_COUNT) :
_id = 'segment #'.join([str(rows.index(i)),self.name]) print ()
segment = idf.loc[i,:] #.to_dict(orient='records') print (i)
_id = 'segment # '.join([str(i),' ',self.name])
indexes = rows[i]
segment = idf.loc[indexes,:].copy() #.to_dict(orient='records')
proc = Post(target = self._oargs,rows = segment,name=_id) proc = Post(target = self._oargs,rows = segment,name=_id)
self.jobs.append(proc) self.jobs.append(proc)
proc.start() proc.start()
self.log(module='write',action='working ...',name=self.name) self.log(module='write',action='working',segment=_id)
# while poc :
# proc = [job for job in proc if job.is_alive()]
# time.sleep(1)
except Exception as e: except Exception as e:
print (e) print (e)
@ -168,13 +175,16 @@ if __name__ == '__main__' :
if 'source' in SYS_ARGS : if 'source' in SYS_ARGS :
_config['source'] = {"type":"disk.DiskReader","args":{"path":SYS_ARGS['source'],"delimiter":","}} _config['source'] = {"type":"disk.DiskReader","args":{"path":SYS_ARGS['source'],"delimiter":","}}
_config['jobs'] = 10 if 'jobs' not in SYS_ARGS else int(SYS_ARGS['jobs']) _config['jobs'] = 3 if 'jobs' not in SYS_ARGS else int(SYS_ARGS['jobs'])
etl = ETL (**_config) etl = ETL (**_config)
if not index : if index is None:
etl.start() etl.start()
procs.append(etl) procs.append(etl)
if index and _info.index(_config) == index :
elif _info.index(_config) == index :
# print (_config)
procs = [etl] procs = [etl]
etl.start() etl.start()
break break

2
transport/__init__.py
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@ -162,7 +162,7 @@ def instance(**_args):
if provider not in ['mongodb','couchdb','bigquery'] : if provider not in ['mongodb','couchdb','bigquery'] :
uri = ''.join([provider,"://",account,host,'/',database]) uri = ''.join([provider,"://",account,host,'/',database])
e = sqlalchemy.create_engine (uri) e = sqlalchemy.create_engine (uri,future=True)
args['sqlalchemy'] = e args['sqlalchemy'] = e
# #
# @TODO: Include handling of bigquery with SQLAlchemy # @TODO: Include handling of bigquery with SQLAlchemy

67
transport/sql.py
Unescape View File

@ -21,7 +21,7 @@ else:
import json import json
from google.oauth2 import service_account from google.oauth2 import service_account
from google.cloud import bigquery as bq from google.cloud import bigquery as bq
from multiprocessing import Lock from multiprocessing import Lock, RLock
import pandas as pd import pandas as pd
import numpy as np import numpy as np
import nzpy as nz #--- netezza drivers import nzpy as nz #--- netezza drivers
@ -30,7 +30,7 @@ import os
class SQLRW : class SQLRW :
lock = RLock()
DRIVERS = {"postgresql":pg,"redshift":pg,"mysql":my,"mariadb":my,"netezza":nz} DRIVERS = {"postgresql":pg,"redshift":pg,"mysql":my,"mariadb":my,"netezza":nz}
REFERENCE = { REFERENCE = {
"netezza":{"port":5480,"handler":nz,"dtype":"VARCHAR(512)"}, "netezza":{"port":5480,"handler":nz,"dtype":"VARCHAR(512)"},
@ -71,7 +71,7 @@ class SQLRW :
# _handler = SQLWriter.REFERENCE[_provider]['handler'] # _handler = SQLWriter.REFERENCE[_provider]['handler']
_handler = _args['driver'] #-- handler to the driver _handler = _args['driver'] #-- handler to the driver
self._dtype = _args['default']['type'] if 'default' in _args and 'type' in _args['default'] else 'VARCHAR(256)' self._dtype = _args['default']['type'] if 'default' in _args and 'type' in _args['default'] else 'VARCHAR(256)'
self._provider = _args['provider'] # self._provider = _args['provider']
# self._dtype = SQLWriter.REFERENCE[_provider]['dtype'] if 'dtype' not in _args else _args['dtype'] # self._dtype = SQLWriter.REFERENCE[_provider]['dtype'] if 'dtype' not in _args else _args['dtype']
# self._provider = _provider # self._provider = _provider
if _handler == nz : if _handler == nz :
@ -173,7 +173,7 @@ class SQLWriter(SQLRW,Writer):
# In the advent that data typing is difficult to determine we can inspect and perform a default case # In the advent that data typing is difficult to determine we can inspect and perform a default case
# This slows down the process but improves reliability of the data # This slows down the process but improves reliability of the data
# NOTE: Proper data type should be set on the target system if their source is unclear. # NOTE: Proper data type should be set on the target system if their source is unclear.
self._inspect = False if 'inspect' not in _args else _args['inspect']
self._cast = False if 'cast' not in _args else _args['cast'] self._cast = False if 'cast' not in _args else _args['cast']
def init(self,fields=None): def init(self,fields=None):
@ -244,50 +244,11 @@ class SQLWriter(SQLRW,Writer):
# # # #
# # We are assuming 2 cases i.e dict or pd.DataFrame # # We are assuming 2 cases i.e dict or pd.DataFrame
# info = [info] if type(info) == dict else info.values.tolist() # info = [info] if type(info) == dict else info.values.tolist()
cursor = self.conn.cursor()
try: try:
table = self._tablename(self.table) table = self._tablename(self.table)
_sql = "INSERT INTO :table (:fields) VALUES (:values)".replace(":table",table) #.replace(":table",self.table).replace(":fields",_fields) _sql = "INSERT INTO :table (:fields) VALUES (:values)".replace(":table",table) #.replace(":table",self.table).replace(":fields",_fields)
if self._inspect :
for _row in info :
fields = list(_row.keys())
if self._cast == False :
values = ",".join(_row.values())
else:
# values = "'"+"','".join([str(value) for value in _row.values()])+"'"
values = [",".join(["%(",name,")s"]) for name in _row.keys()]
# values = [ "".join(["'",str(_row[key]),"'"]) if np.nan(_row[key]).isnumeric() else str(_row[key]) for key in _row]
# print (values)
query = _sql.replace(":fields",",".join(fields)).replace(":values",values)
if type(info) == pd.DataFrame :
_values = info.values.tolist()
elif type(info) == list and type(info[0]) == dict:
print ('........')
_values = [tuple(item.values()) for item in info]
else:
_values = info;
cursor.execute(query,_values)
pass
else:
# _sql = _sql.replace(":fields",_fields)
# _sql = _sql.replace(":values",",".join(["%("+name+")s" for name in self.fields]))
# _sql = _sql.replace("(:fields)","")
# _sql = _sql.replace(":values",values)
# if type(info) == pd.DataFrame :
# _info = info[self.fields].values.tolist()
# elif type(info) == dict :
# _info = info.values()
# else:
# # _info = []
# _info = pd.DataFrame(info)[self.fields].values.tolist()
# _info = pd.DataFrame(info).to_dict(orient='records')
if type(info) == list : if type(info) == list :
_info = pd.DataFrame(info) _info = pd.DataFrame(info)
elif type(info) == dict : elif type(info) == dict :
@ -296,18 +257,25 @@ class SQLWriter(SQLRW,Writer):
_info = pd.DataFrame(info) _info = pd.DataFrame(info)
if self._engine : if _info.shape[0] == 0 :
# pd.to_sql(_info,self._engine)
rows = _info.to_sql(table,self._engine,schema=self.schema,if_exists='append',index=False) return
SQLRW.lock.acquire()
if self._engine is not None:
# pd.to_sql(_info,self._engine)
if self.schema in ['',None] :
rows = _info.to_sql(table,self._engine,if_exists='append',index=False)
else:
rows = _info.to_sql(self.table,self._engine,schema=self.schema,if_exists='append',index=False)
else: else:
_fields = ",".join(self.fields) _fields = ",".join(self.fields)
_sql = _sql.replace(":fields",_fields) _sql = _sql.replace(":fields",_fields)
values = ", ".join("?"*len(self.fields)) if self._provider == 'netezza' else ",".join(["%s" for name in self.fields]) values = ", ".join("?"*len(self.fields)) if self._provider == 'netezza' else ",".join(["%s" for name in self.fields])
_sql = _sql.replace(":values",values) _sql = _sql.replace(":values",values)
cursor = self.conn.cursor()
cursor.executemany(_sql,_info.values.tolist()) cursor.executemany(_sql,_info.values.tolist())
cursor.close()
# cursor.commit() # cursor.commit()
# self.conn.commit() # self.conn.commit()
@ -315,7 +283,10 @@ class SQLWriter(SQLRW,Writer):
print(e) print(e)
pass pass
finally: finally:
if self._engine is None :
self.conn.commit() self.conn.commit()
SQLRW.lock.release()
# cursor.close() # cursor.close()
pass pass
def close(self): def close(self):

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