def __init__(self, backend=None, noshutdown=False, db=None, opts=None):
self.db = DBCache(db)
self.log = MythLog(self.logmodule, db=self.db)
self.hostname = None
if opts is None:
self.opts = BEConnection.BEConnOpts(noshutdown)
else:
self.opts = opts
if backend is None:
# no backend given, use master
self.host = self.db.settings.NULL.MasterServerIP
else:
if self._reip.match(backend):
# given backend is IP address
self.host = backend
else:
# given backend is hostname, pull address from database
self.hostname = backend
self.host = self.db.settings[backend].BackendServerIP
if not self.host:
raise MythDBError(MythError.DB_SETTING, 'BackendServerIP',
backend)
if self.hostname is None:
# reverse lookup hostname from address
with self.db.cursor(self.log) as cursor:
if cursor.execute(
"""SELECT hostname FROM settings
WHERE value='BackendServerIP'
AND data=?""", [self.host]) == 0:
# no match found
raise MythDBError(MythError.DB_SETTING, 'BackendServerIP',
self.host)
self.hostname = cursor.fetchone()[0]
# 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._uuid = uuid4()
self._ident = '%s:%d' % (self.host, self.port)
if self._ident in self._shared:
# existing connection found
# register and reconnect if necessary
self.be = self._shared[self._ident]
self.be.registeruser(self._uuid, self.opts)
self.be.reconnect()
else:
# no existing connection, create new
self.be = BEConnection(self.host, self.port, \
self.db.gethostname(), self.opts)
self.be.registeruser(self._uuid, self.opts)
self._shared[self._ident] = self.be
def __init__(self, backend=None, noshutdown=False, db=None, opts=None):
self.db = DBCache(db)
self.log = MythLog(self.logmodule, db=self.db)
self.hostname = None
if opts is None:
self.opts = BEConnection.BEConnOpts(noshutdown)
else:
self.opts = opts
if backend is None:
# no backend given, use master
self.host = self.db.settings.NULL.MasterServerIP
else:
if self._reip.match(backend):
# given backend is IP address
self.host = backend
else:
# given backend is hostname, pull address from database
self.hostname = backend
self.host = self.db.settings[backend].BackendServerIP
if not self.host:
raise MythDBError(MythError.DB_SETTING,
'BackendServerIP', backend)
if self.hostname is None:
# reverse lookup hostname from address
with self.db.cursor(self.log) as cursor:
if cursor.execute("""SELECT hostname FROM settings
WHERE value='BackendServerIP'
AND data=?""", [self.host]) == 0:
# no match found
raise MythDBError(MythError.DB_SETTING, 'BackendServerIP',
self.host)
self.hostname = cursor.fetchone()[0]
# 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._uuid = uuid4()
self._ident = '%s:%d' % (self.host, self.port)
if self._ident in self._shared:
# existing connection found
# register and reconnect if necessary
self.be = self._shared[self._ident]
self.be.registeruser(self._uuid, self.opts)
self.be.reconnect()
else:
# no existing connection, create new
self.be = BEConnection(self.host, self.port, \
self.db.gethostname(), self.opts)
self.be.registeruser(self._uuid, self.opts)
self._shared[self._ident] = self.be
def __init__(self, backend=None, noshutdown=False, systemevents=False,\
generalevents=True, db=None, opts=None):
if opts is None:
opts = BEConnection.BEConnOpts(noshutdown,\
systemevents, generalevents)
BECache.__init__(self, backend, db=db, opts=opts)
# must be done to retain hard reference
self._events = self._listhandlers()
for func in self._events:
self.registerevent(func)
def __init__(self, host, port, localname, filename, sgroup, mode):
self.filename = filename
self.sgroup = sgroup
self.mode = mode
BEConnection.__init__(self, host, port, localname)
class BECache( SplitInt ):
"""
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:
joinInt() - convert two signed ints to one 64-bit
signed int
splitInt() - convert one 64-bit signed int to two
signed ints
backendCommand() - Sends a formatted command to the backend
and returns the response.
"""
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, noshutdown=False, db=None, opts=None):
self.db = DBCache(db)
self.log = MythLog(self.logmodule, db=self.db)
self.hostname = None
if opts is None:
self.opts = BEConnection.BEConnOpts(noshutdown)
else:
self.opts = opts
if backend is None:
# no backend given, use master
self.host = self.db.settings.NULL.MasterServerIP
else:
if self._reip.match(backend):
# given backend is IP address
self.host = backend
else:
# given backend is hostname, pull address from database
self.hostname = backend
self.host = self.db.settings[backend].BackendServerIP
if not self.host:
raise MythDBError(MythError.DB_SETTING,
'BackendServerIP', backend)
if self.hostname is None:
# reverse lookup hostname from address
with self.db.cursor(self.log) as cursor:
if cursor.execute("""SELECT hostname FROM settings
WHERE value='BackendServerIP'
AND data=?""", [self.host]) == 0:
# no match found
raise MythDBError(MythError.DB_SETTING, 'BackendServerIP',
self.host)
self.hostname = cursor.fetchone()[0]
# 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._uuid = uuid4()
self._ident = '%s:%d' % (self.host, self.port)
if self._ident in self._shared:
# existing connection found
# register and reconnect if necessary
self.be = self._shared[self._ident]
self.be.registeruser(self._uuid, self.opts)
self.be.reconnect()
else:
# no existing connection, create new
self.be = BEConnection(self.host, self.port, \
self.db.gethostname(), self.opts)
self.be.registeruser(self._uuid, self.opts)
self._shared[self._ident] = self.be
def backendCommand(self, data):
"""
obj.backendCommand(data) -> response string
Sends a formatted command via a socket to the mythbackend.
"""
return self.be.backendCommand(data)
def __init__(self, host, port, localname, filename, sgroup, mode):
self.filename = filename
self.sgroup = sgroup
self.mode = mode
BEConnection.__init__(self, host, port, localname)
def _newcmdconn(self):
return BEConnection(self.host, self.port, self.db.gethostname(),
self.blockshutdown)
class BECache(SplitInt):
"""
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:
joinInt() - convert two signed ints to one 64-bit
signed int
splitInt() - convert one 64-bit signed int to two
signed ints
backendCommand() - Sends a formatted command to the backend
and returns the response.
"""
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, noshutdown=False, db=None, opts=None):
self.db = DBCache(db)
self.log = MythLog(self.logmodule, db=self.db)
self.hostname = None
if opts is None:
self.opts = BEConnection.BEConnOpts(noshutdown)
else:
self.opts = opts
if backend is None:
# no backend given, use master
self.host = self.db.settings.NULL.MasterServerIP
else:
if self._reip.match(backend):
# given backend is IP address
self.host = backend
else:
# given backend is hostname, pull address from database
self.hostname = backend
self.host = self.db.settings[backend].BackendServerIP
if not self.host:
raise MythDBError(MythError.DB_SETTING, 'BackendServerIP',
backend)
if self.hostname is None:
# reverse lookup hostname from address
with self.db.cursor(self.log) as cursor:
if cursor.execute(
"""SELECT hostname FROM settings
WHERE value='BackendServerIP'
AND data=?""", [self.host]) == 0:
# no match found
raise MythDBError(MythError.DB_SETTING, 'BackendServerIP',
self.host)
self.hostname = cursor.fetchone()[0]
# 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._uuid = uuid4()
self._ident = '%s:%d' % (self.host, self.port)
if self._ident in self._shared:
# existing connection found
# register and reconnect if necessary
self.be = self._shared[self._ident]
self.be.registeruser(self._uuid, self.opts)
self.be.reconnect()
else:
# no existing connection, create new
self.be = BEConnection(self.host, self.port, \
self.db.gethostname(), self.opts)
self.be.registeruser(self._uuid, self.opts)
self._shared[self._ident] = self.be
def backendCommand(self, data):
"""
obj.backendCommand(data) -> response string
Sends a formatted command via a socket to the mythbackend.
"""
return self.be.backendCommand(data)
