Mercurial > hg > Feedworm

annotate Database.py @ 65:e24777e346e7

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
add a runner script for Xanthippe
author dirk@xanthippe.ping.de
date Thu, 29 Jul 2010 21:05:41 +0200
parents 254d5b89a6ca
children 842727971796
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
34
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
1
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
2 import Mapping
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
3 import sqlalchemy
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
4 import sqlalchemy.orm
37
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.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 34
diff changeset
5 import sys
57
254d5b89a6ca make sqlalchemy logging configurable through the --databaseLogging commandline parameter
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 37
diff changeset
6 import util
34
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
7
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
8 # 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
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
9 # operate on a single engine/session but this comes in handy for interactive use
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
10 engine = None
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
11 SessionMaker = None
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
12
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
13 def createSession():
37
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.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 34
diff changeset
14 databaseUrl = _getDatabaseUrl()
34
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
15 initEngine(databaseUrl)
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
16 Mapping.createMapping(engine)
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
17 initSessionMaker()
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
18 return SessionMaker()
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
19
37
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.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 34
diff changeset
20 def _getDatabaseUrl():
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.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 34
diff changeset
21 if len(sys.argv) < 2:
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.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 34
diff changeset
22 print("Usage: %s <database url>" % (sys.argv[0]))
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.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 34
diff changeset
23 sys.exit(1)
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.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 34
diff changeset
24 return sys.argv[1]
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.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 34
diff changeset
25
34
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
26 def initEngine(databaseUrl):
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
27 global engine
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
28 if engine is None:
57
254d5b89a6ca make sqlalchemy logging configurable through the --databaseLogging commandline parameter
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 37
diff changeset
29 verbose = util.databaseLoggingEnabled()
254d5b89a6ca make sqlalchemy logging configurable through the --databaseLogging commandline parameter
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 37
diff changeset
30 engine = sqlalchemy.create_engine(databaseUrl, echo=verbose)
34
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
31
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
32 def initSessionMaker():
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
33 global SessionMaker
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
34 if SessionMaker is None:
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
35 SessionMaker = sqlalchemy.orm.sessionmaker(bind=engine)
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
36