本文整理匯總了Python中database.DBCache._getpreferredaddr方法的典型用法代碼示例。如果您正苦於以下問題：Python DBCache._getpreferredaddr方法的具體用法？Python DBCache._getpreferredaddr怎麽用？Python DBCache._getpreferredaddr使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類database.DBCache的用法示例。
在下文中一共展示了DBCache._getpreferredaddr方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: BECache
# 需要導入模塊: from database import DBCache [as 別名]
# 或者: from database.DBCache import _getpreferredaddr [as 別名]
class BECache( object ):
"""
BECache(backend=None, noshutdown=False, db=None)
-> MythBackend connection object
Basic class for mythbackend socket connections.
Offers connection caching to prevent multiple connections.
'backend' allows a hostname or IP address to connect to. If not provided,
connect will be made to the master backend. Port is always
taken from the database.
'db' allows an existing database object to be supplied.
'noshutdown' specified whether the backend will be allowed to go into
automatic shutdown while the connection is alive.
Available methods:
backendCommand() - Sends a formatted command to the backend
and returns the response.
"""
class _ConnHolder( object ):
blockshutdown = 0
command = None
event = None
logmodule = 'Python Backend Connection'
_shared = weakref.WeakValueDictionary()
_reip = re.compile('(?:\d{1,3}\.){3}\d{1,3}')
def __repr__(self):
return "<%s 'myth://%s:%d/' at %s>" % \
(str(self.__class__).split("'")[1].split(".")[-1],
self.hostname, self.port, hex(id(self)))
def __init__(self, backend=None, blockshutdown=False, events=False, db=None):
self.db = DBCache(db)
self.log = MythLog(self.logmodule, db=self.db)
self.hostname = None
self.sendcommands = True
self.blockshutdown = blockshutdown
self.receiveevents = events
if backend is None:
# no backend given, use master
self.host = self.db.settings.NULL.MasterServerIP
self.hostname = self.db._gethostfromaddr(self.host)
else:
backend = backend.strip('[]')
query = "SELECT hostname FROM settings WHERE value=? AND data=?"
if self._reip.match(backend):
# given backend is IP address
self.host = backend
self.hostname = self.db._gethostfromaddr(
backend, 'BackendServerIP')
elif check_ipv6(backend):
# given backend is IPv6 address
self.host = backend
self.hostname = self.db._gethostfromaddr(
backend, 'BackendServerIP6')
else:
# given backend is hostname, pull address from database
self.hostname = backend
self.host = self.db._getpreferredaddr(backend)
# lookup port from database
self.port = int(self.db.settings[self.hostname].BackendServerPort)
if not self.port:
raise MythDBError(MythError.DB_SETTING, 'BackendServerPort',
self.port)
self._ident = '%s:%d' % (self.host, self.port)
if self._ident in self._shared:
# existing connection found
self._conn = self._shared[self._ident]
if self.sendcommands:
if self._conn.command is None:
self._conn.command = self._newcmdconn()
elif self.blockshutdown:
# upref block of shutdown
# issue command to backend if needed
self._conn.blockshutdown += 1
if self._conn.blockshutdown == 1:
self._conn.command.blockShutdown()
if self.receiveevents:
if self._conn.event is None:
self._conn.event = self._neweventconn()
else:
# no existing connection, create new
self._conn = self._ConnHolder()
if self.sendcommands:
self._conn.command = self._newcmdconn()
if self.blockshutdown:
self._conn.blockshutdown = 1
if self.receiveevents:
self._conn.event = self._neweventconn()
self._shared[self._ident] = self._conn
#.........這裏部分代碼省略.........