Mercurial > hg > Feedworm

annotate Database.py @ 49:6eba4168fd54

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move the logic to add a feed into AddFeed
author Dirk Olmes <dirk@xanthippe.ping.de>
date Mon, 17 May 2010 03:52:13 +0200
parents 22214d79ed41
children 254d5b89a6ca
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5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
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parents:
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2 import Mapping
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3 import sqlalchemy
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4 import sqlalchemy.orm
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22214d79ed41 database URL must be given as commandline argument now, no need for creating complicated config files. Add a menu entry for opening the selected article in browser.
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5 import sys
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7 # Keep the connection to the database only once. The feed updater and the GUI app will
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
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8 # operate on a single engine/session but this comes in handy for interactive use
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9 engine = None
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10 SessionMaker = None
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12 def createSession():
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13 databaseUrl = _getDatabaseUrl()
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14 initEngine(databaseUrl)
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15 Mapping.createMapping(engine)
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16 initSessionMaker()
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17 return SessionMaker()
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19 def _getDatabaseUrl():
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20 if len(sys.argv) < 2:
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21 print("Usage: %s <database url>" % (sys.argv[0]))
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22 sys.exit(1)
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23 return sys.argv[1]
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25 def initEngine(databaseUrl):
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26 global engine
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27 if engine is None:
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28 engine = sqlalchemy.create_engine(databaseUrl, echo=True)
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30 def initSessionMaker():
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31 global SessionMaker
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32 if SessionMaker is None:
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33 SessionMaker = sqlalchemy.orm.sessionmaker(bind=engine)
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