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comparison BackendFactory.py @ 137:5b131f82057d

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allow choosing the backend via commandline option
author Dirk Olmes <dirk@xanthippe.ping.de>
date Tue, 23 Aug 2011 14:36:58 +0200
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children bb3c851b18b1
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136:7217b060b39c 137:5b131f82057d
1
2 import argparse
3
4 SQLALCHEMY_BACKEND = "sqlalchemy"
5 COUCHDB_BACKEND = "couchdb"
6
7 def _parseArguments():
8 parser = argparse.ArgumentParser()
9 parser.add_argument("--backend", nargs="?", choices=[SQLALCHEMY_BACKEND, COUCHDB_BACKEND],
10 required=True, help="Specify the backend to use: either sqlalchemy or couchdb")
11 return parser.parse_known_args()
12
13 def createBackend():
14 args = _parseArguments()
15 backend = args[0].backend
16 if backend == SQLALCHEMY_BACKEND:
17 from backend.sqlalchemy.SqlAlchemyBackend import SqlAlchemyBackend
18 return SqlAlchemyBackend()
19 elif backend == COUCHDB_BACKEND:
20 from backend.couchdb.CouchDbBackend import CouchDbBackend
21 return CouchDbBackend()
22 else:
23 raise Exception("no backend configured")