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@@ -0,0 +1,73 @@
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+# -*- coding: utf-8 -*-
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+import os
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+import re
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+import logging as logger
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+
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+import sqlalchemy as sqla
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+from django.conf import settings
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+
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+
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+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "Lodel.settings")
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+
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+ENGINES = {'mysql': {
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+ 'driver': 'pymysql',
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+ 'encoding': 'utf8'
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+ },
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+ 'postgresql': {
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+ 'driver': 'psycopg2',
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+ 'encoding': 'utf8',
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+ },
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+ 'sqlite': {
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+ 'driver': 'pysqlite',
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+ 'encoding': 'utf8',
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+ },
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+}
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+
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+sqlcfg = settings.LODEL2SQLWRAPPER
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+
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+def getEngine(ename = 'default', sqlalogging = None):
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+ """ Return a sqlalchemy engine
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+ @param read bool: If True return the read engine, else
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+ return the write one
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+ @return a sqlachemy engine instance
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+
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+ @todo Put the check on db config in SqlWrapper.checkConf()
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+ """
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+ #Loading confs
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+ cfg = sqlcfg['db'][ename]
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+
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+ edata = ENGINES[cfg['ENGINE']] #engine infos
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+ conn_str = ""
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+
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+ if cfg['ENGINE'] == 'sqlite':
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+ #Sqlite connection string
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+ conn_str = '%s+%s:///%s'%( cfg['ENGINE'],
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+ edata['driver'],
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+ cfg['NAME'])
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+ else:
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+ #Mysql and Postgres connection string
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+ user = cfg['USER']
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+ user += (':'+cfg['PASSWORD'] if 'PASSWORD' in cfg else '')
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+
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+ if 'HOST' not in cfg:
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+ logger.info('Not HOST in configuration, using localhost')
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+ host = 'localhost'
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+ else:
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+ host = cfg['HOST']
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+
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+ host += (':'+cfg['PORT'] if 'PORT' in cfg else '')
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+
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+ conn_str = '%s+%s://'%(cfg['ENGINE'], edata['driver'])
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+ conn_str += '%s@%s/%s'%(user,host,cfg['NAME'])
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+
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+
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+ ret = sqla.create_engine(conn_str, encoding=edata['encoding'], echo=sqlalogging)
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+
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+ logger.debug("Getting engine :"+str(ret))
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+
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+ return ret
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+
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+def meta(engine):
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+ res = sqla.MetaData()
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+ res.reflect(bind=engine)
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+ return res
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