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Merge pull request #4 from lnyemba/dev

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updates with version handling and new handler
pull/6/head
Steve L. Nyemba 1 year ago committed by GitHub
parent b5dc44a797 b4081a1d62
commit b04eb5e7e5
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6 changed files with 243 additions and 30 deletions
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150
transport/__init__.py
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@ -38,6 +38,7 @@ if sys.version_info[0] > 2 :
from transport import sql as sql
from transport import etl as etl
from transport.version import __version__
from transport import providers
else:
from common import Reader, Writer,Console #, factory
import disk
@ -48,37 +49,39 @@ else:
import sql
import etl
from version import __version__
import providers
import psycopg2 as pg
import mysql.connector as my
from google.cloud import bigquery as bq
import nzpy as nz #--- netezza drivers
import os
class providers :
POSTGRESQL = 'postgresql'
MONGODB = 'mongodb'
BIGQUERY ='bigquery'
FILE = 'file'
ETL = 'etl'
SQLITE = 'sqlite'
SQLITE3= 'sqlite'
REDSHIFT = 'redshift'
NETEZZA = 'netezza'
MYSQL = 'mysql'
RABBITMQ = 'rabbitmq'
MARIADB = 'mariadb'
COUCHDB = 'couch'
CONSOLE = 'console'
ETL = 'etl'
#
# synonyms of the above
BQ = BIGQUERY
MONGO = MONGODB
FERRETDB= MONGODB
PG = POSTGRESQL
PSQL = POSTGRESQL
PGSQL = POSTGRESQL
# class providers :
# POSTGRESQL = 'postgresql'
# MONGODB = 'mongodb'
# BIGQUERY ='bigquery'
# FILE = 'file'
# ETL = 'etl'
# SQLITE = 'sqlite'
# SQLITE3= 'sqlite'
# REDSHIFT = 'redshift'
# NETEZZA = 'netezza'
# MYSQL = 'mysql'
# RABBITMQ = 'rabbitmq'
# MARIADB = 'mariadb'
# COUCHDB = 'couch'
# CONSOLE = 'console'
# ETL = 'etl'
# #
# # synonyms of the above
# BQ = BIGQUERY
# MONGO = MONGODB
# FERRETDB= MONGODB
# PG = POSTGRESQL
# PSQL = POSTGRESQL
# PGSQL = POSTGRESQL
# import providers
class IEncoder (json.JSONEncoder):
def default (self,object):
@ -156,6 +159,103 @@ class factory :
import time
def instance(**_args):
"""
creating an instance given the provider, we should have an idea of :class, :driver
:provider
:read|write = {connection to the database}
"""
_provider = _args['provider']
_group = None
for _id in providers.CATEGORIES :
if _provider in providers.CATEGORIES[_id] :
_group = _id
break
if _group :
_classPointer = _getClassInstance(_group,**_args)
#
# Let us reformat the arguments
if 'read' in _args or 'write' in _args :
_args = _args['read'] if 'read' in _args else _args['write']
_args['provider'] = _provider
if _group == 'sql' :
_info = _get_alchemyEngine(**_args)
_args = dict(_args,**_info)
_args['driver'] = providers.DRIVERS[_provider]
else:
if _provider in providers.DEFAULT :
_default = providers.DEFAULT[_provider]
_defkeys = list(set(_default.keys()) - set(_args.keys()))
if _defkeys :
for key in _defkeys :
_args[key] = _default[key]
pass
#
# get default values from
return _classPointer(**_args)
#
# Let us determine the category of the provider that has been given
def _get_alchemyEngine(**_args):
"""
This function returns the SQLAlchemy engine associated with parameters, This is only applicable for SQL _items
:_args arguments passed to the factory {provider and other}
"""
#@TODO: Enable authentication files (private_key)
_username = _args['username'] if 'username' in _args else ''
_password = _args['password'] if 'password' in _args else ''
_account = _args['account'] if 'account' in _args else ''
_database = _args['database']
_provider = _args['provider']
if _username != '':
_account = _username + ':'+_password+'@'
_host = _args['host'] if 'host' in _args else ''
_port = _args['port'] if 'port' in _args else ''
if _provider in providers.DEFAULT :
_default = providers.DEFAULT[_provider]
_host = _host if _host != '' else (_default['host'] if 'host' in _default else '')
_port = _port if _port != '' else (_default['port'] if 'port' in _default else '')
if _port == '':
_port = providers.DEFAULT['port'] if 'port' in providers.DEFAULT else ''
#
if _host != '' and _port != '' :
_fhost = _host+":"+str(_port) #--formatted hostname
else:
_fhost = _host
# Let us update the parameters we have thus far
#
uri = ''.join([_provider,"://",_account,_fhost,'/',_database])
_engine = sqlalchemy.create_engine (uri,future=True)
_out = {'sqlalchemy':_engine}
_pargs = {'host':_host,'port':_port,'username':_username,'password':_password}
for key in _pargs :
if _pargs[key] != '' :
_out[key] = _pargs[key]
return _out
def _getClassInstance(_group,**_args):
"""
This function returns the class instance we are attempting to instanciate
:_group items in providers.CATEGORIES.keys()
:_args arguments passed to the factory class
"""
if 'read' in _args or 'write' in _args :
_context = 'read' if 'read' in _args else _args['write']
_info = _args[_context]
else:
_context = _args['context'] if 'context' in _args else 'read'
_class = providers.READ[_group] if _context == 'read' else providers.WRITE[_group]
if type(_class) == dict and _args['provider'] in _class:
_class = _class[_args['provider']]
return _class
def __instance(**_args):
"""
@param provider {file,sqlite,postgresql,redshift,bigquery,netezza,mongo,couch ...}
@param context read|write|rw

5
transport/mongo.py
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@ -127,6 +127,8 @@ class MongoReader(Mongo,Reader):
return pd.DataFrame(r)
else:
if 'table' in args or 'collection' in args :
if 'table' in args:
_uid = args['table']
@ -134,7 +136,8 @@ class MongoReader(Mongo,Reader):
_uid = args['collection']
else:
_uid = self.uid
else:
_uid = self.uid
collection = self.db[_uid]
_filter = args['filter'] if 'filter' in args else {}
_df = pd.DataFrame(collection.find(_filter))

63
transport/providers.py
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@ -0,0 +1,63 @@
from transport.common import Reader, Writer,Console #, factory
from transport import disk
import sqlite3
from transport import s3 as s3
from transport import rabbitmq as queue
from transport import couch as couch
from transport import mongo as mongo
from transport import sql as sql
from transport import etl as etl
from transport import qlistener
import psycopg2 as pg
import mysql.connector as my
from google.cloud import bigquery as bq
import nzpy as nz #--- netezza drivers
import os
from transport.version import __version__
POSTGRESQL = 'postgresql'
MONGODB = 'mongodb'
HTTP='http'
BIGQUERY ='bigquery'
FILE = 'file'
ETL = 'etl'
SQLITE = 'sqlite'
SQLITE3= 'sqlite'
REDSHIFT = 'redshift'
NETEZZA = 'netezza'
MYSQL = 'mysql'
RABBITMQ = 'rabbitmq'
MARIADB = 'mariadb'
COUCHDB = 'couch'
CONSOLE = 'console'
ETL = 'etl'
#
# synonyms of the above
BQ = BIGQUERY
MONGO = MONGODB
FERRETDB= MONGODB
PG = POSTGRESQL
PSQL = POSTGRESQL
PGSQL = POSTGRESQL
S3 = 's3'
AWS_S3 = 's3'
RABBIT = RABBITMQ
QLISTENER = 'qlistener'
DRIVERS = {PG:pg,REDSHIFT:pg,MYSQL:my,MARIADB:my,NETEZZA:nz,SQLITE:sqlite3}
CATEGORIES ={'sql':[NETEZZA,PG,MYSQL,REDSHIFT,SQLITE,MARIADB],'nosql':[MONGODB,COUCHDB],'cloud':[BIGQUERY],'file':[FILE],
'queue':[RABBIT,QLISTENER],'memory':[CONSOLE,QLISTENER],'http':[HTTP]}
READ = {'sql':sql.SQLReader,'nosql':{MONGODB:mongo.MongoReader,COUCHDB:couch.CouchReader},'cloud':sql.BigQueryReader,
'file':disk.DiskReader,'queue':{RABBIT:queue.QueueReader,QLISTENER:qlistener.qListener}
}
WRITE = {'sql':sql.SQLWriter,'nosql':{MONGODB:mongo.MongoWriter,COUCHDB:couch.CouchWriter},'cloud':sql.BigQueryWriter,
'file':disk.DiskWriter,'queue':{RABBIT:queue.QueueWriter,QLISTENER:qlistener.qListener}
}
DEFAULT = {PG:{'host':'localhost','port':5432},MYSQL:{'host':'localhost','port':3306}}
DEFAULT[MONGODB] = {'port':27017,'host':'localhost'}
DEFAULT[REDSHIFT] = DEFAULT[PG]
DEFAULT[MARIADB] = DEFAULT[MYSQL]
DEFAULT[NETEZZA] = {'port':5480}

42
transport/qlistener.py
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@ -0,0 +1,42 @@
import queue
from threading import Thread, Lock
from transport.common import Reader,Writer
import numpy as np
import pandas as pd
class qListener :
lock = Lock()
_queue = {'default':queue.Queue()}
def __init__(self,**_args):
self._cache = {}
self._callback = _args['callback'] if 'callback' in _args else None
self._id = _args['id'] if 'id' in _args else 'default'
if self._id not in qListener._queue :
qListener._queue[self._id] = queue.Queue()
thread = Thread(target=self._forward)
thread.start()
def _forward(self):
_q = qListener._queue[self._id]
_data = _q.get()
_q.task_done()
self._callback(_data)
def has(self,**_args) :
return self._callback is not None
def close(self):
"""
This will empty the queue and have it ready for another operation
"""
_q = qListener._queue[self._id]
with _q.mutex:
_q.queue.clear()
_q.all_tasks_done.notify_all()
def write(self,_data,**_args):
_id = _args['id'] if 'id' in _args else self._id
_q = qListener._queue[_id]
_q.put(_data)
_q.join()

11
transport/sql.py
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@ -29,6 +29,7 @@ from multiprocessing import Lock, RLock
import pandas as pd
import numpy as np
import nzpy as nz #--- netezza drivers
import sqlite3
import copy
import os
@ -58,8 +59,8 @@ class SQLRW :
# _info['host'] = 'localhost' if 'host' not in _args else _args['host']
# _info['port'] = SQLWriter.REFERENCE[_provider]['port'] if 'port' not in _args else _args['port']
_info['host'] = _args['host']
_info['port'] = _args['port']
_info['host'] = _args['host'] if 'host' in _args else ''
_info['port'] = _args['port'] if 'port' in _args else ''
# if 'host' in _args :
# _info['host'] = 'localhost' if 'host' not in _args else _args['host']
@ -98,8 +99,12 @@ class SQLRW :
if _handler == my :
_info['database'] = _info['dbname']
del _info['dbname']
if _handler == sqlite3 :
_info = {'path':_info['dbname'],'isolation_level':'IMMEDIATE'}
if _handler != sqlite3 :
self.conn = _handler.connect(**_info)
else:
self.conn = _handler.connect(_info['path'],isolation_level='IMMEDIATE')
self._engine = _args['sqlalchemy'] if 'sqlalchemy' in _args else None
def meta(self,**_args):
schema = []

2
transport/version.py
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@ -1,2 +1,2 @@
__author__ = 'The Phi Technology'
__version__= '1.8.1'
__version__= '1.8.2'

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