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gnuviechadmin-historic/backend/GnuviechAdmin/ServiceFacade.py

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#
# Service facade for gnuviech-admin tool backend
# (c) 2006 Jan Dittberner <jan@dittberner.info>
# $Id$
#
from SessionManager import *
from DomainManager import *
import Settings
import psycopg2
class ServiceFacade:
"""
This class implements the facade to the services provided by the
gnuviech admin backend.
"""
def __init__(self):
connstr = 'host=%(dbhost)s user=%(dbuser)s ' + \
'password=%(dbpassword)s dbname=%(dbname)s'
dbconn = psycopg2.connect(connstr % Settings.DBSETTINGS)
self.sessionManager = SessionManager(dbconn)
self.domainManager = DomainManager(dbconn)
def _dispatch(self, method, params):
try:
func = getattr(self, method)
except AttributeError:
raise Exception('method "%s" is not supported' % method)
else:
if method != 'login' and method != 'logout':
sessionid = params[0]
try:
session = self.sessionManager.getSession(sessionid)
except InvalidSessionError:
return ""
nparams = [session]
for item in params[1:]:
nparams.append(item)
params = nparams
self.sessionManager.updateSession(sessionid)
return func(*params)
def login(self, login, password):
"""
Logs in the user specified by the given login and password.
The method creates a session and returns the session id which
has to be sent back by subsequent requests. If the login is
invalid the returned id is 0
"""
try:
return self.sessionManager.newSession(login, password)
except InvalidLoginError, ile:
return 0
def logout(self, sessionid):
self.sessionManager.deleteSession(sessionid)
return 0
def listdomains(self, session):
"""
Lists the domains the given session may see.
"""
return self.domainManager.listDomains(session)