class TServer(Object):
'''Class used by ServerDict to manage TangoDeviceServer admin devices.'''
def __init__(self, name='', host='', parent=None):
if not name or '/' not in name:
raise Exception, 'TServer_WrongServerName_%s' % name
self.info = None
self.name = self.get_simple_name(name)
self.update_level(host, 0)
self.controlled = False
self.level = 0
self._classes = None
self.state = None #PyTango.DevState.UNKNOWN
self.log = Logger('TServer-%s' % name)
if parent and parent.log.getLogLevel():
self.log.setLogLevel(parent.log.getLogLevel())
else:
self.log.setLogLevel('ERROR')
self.state_lock = threading.Lock()
if parent: self.proxies = parent.proxies
else: self.proxies = ProxiesDict()
pass
def set_state(self, state):
self.state_lock.acquire()
self.state = state
self.state_lock.release()
def ping(self, dname=None):
'''Executes .ping() and .state() methods of the admin device.'''
name = dname or self.get_admin_name()
wait = threading.Event().wait
if not dname: self.set_state(None)
try:
proxy = self.get_proxy(name)
except:
self.log.error('%s.ping() ... %s not in database!!!' %
(self.name, name))
return None
wait(.01) #this wait allows parallel threads
try:
proxy.ping()
except:
#self.log.debug( '%s.ping() ... Alive'%s_name)
return None
if not dname:
self.set_state(
PyTango.DevState.FAULT
) #Device pings but its state is not readable (ZOMBIE)
wait(.01) #this wait allows parallel threads
try:
result = proxy.state()
if not dname: self.set_state(result)
return result
except:
if not dname: return self.state
else: return None
def init_from_db(self, db=None, load_devices=False):
""" Gets name, classes, devices, host, level information from Tango Database. """
self._db = db or (self._db
if hasattr(self, '_db') else PyTango.Database())
#print ('init_from_db(%s,%s,%s)'%(self.name,get_tango_host(self._db),load_devices))
self.info = self._db.get_server_info(self.name)
di = get_device_info(
'dserver/' + self.name, db=self._db
) #get_server_info() must be combined with get_device_info to obtain the real name of the launcher
self.name = di.server
self.update_level(self.info.host, self.info.level)
if load_devices: self.get_classes()
def update_level(self, host, level=0):
""" It only initializes the values, does not get values from database. """
self.controlled = True if host or level else False
if type(level) is str: level = level.strip()
if self.controlled:
self.host, self.level = host.split('.')[0].strip(), trial(
int, args=level, excepts=0)
else:
self.host, self.level = '', 0
def get_classes(self, load=False):
if not load and self._classes is not None:
return self._classes
devs = self._db.get_device_class_list(self.name)
self._classes = collections.defaultdict(list)
#print 'loading from %s server:%s'%(s,str(devs))
for i in range(0, len(devs), 2):
klass = devs[i + 1]
self._classes[klass].append(devs[i].lower())
return self._classes
classes = property(fget=get_classes)
def get_server_level(self):
""" It returns initialized values, does not get values from database. """
if self.controlled and self.host: return self.host, self.level
else: return '', 0
def get_simple_name(self, name=''):
'''Returns the name of the server in the Server/Instance format.'''
name = name or self.name
return name if name.count('/') == 1 else name.split('/', 1)[1]
def get_tango_host(self):
return get_tango_host(self._db)
def get_admin_name(self):
'''Returns the name of the server in the dserver/Server/Instance format.'''
n = 'dserver/' + self.name if self.name.count('/') == 1 else self.name
return self.get_tango_host() + '/' + n
def get_starter_name(self):
"""Returns the starter on charge of controlling this server."""
n = 'tango/admin/%s' % self.host if self.host else None
return self.get_tango_host() + '/' + n
def get_device_list(self):
'''Returns a list of devices declared for this server.'''
result = []
[
result.extend(v) for c, v in self.classes.items()
if c.lower() != 'dserver'
]
return result
def get_proxy(self, device=''):
'''Returns a proxy to the given device; or the admin device if no device name is provided.'''
if device and ':' not in device:
device = self.get_tango_host() + '/' + device
device = device or self.get_admin_name()
return self.proxies.get(device)
def get_admin(self):
return self.get_proxy()
def get_device(self, device):
return self.get_proxy(device)
def get_all_states(self):
"""Returns a dictionary with the individual states of the inner devices."""
result = {}
for klass in self.classes:
for device in self.classes[klass]:
try:
result[device] = self.proxies[device].State()
except Exception, e:
self.log.warning('Unable to read %s state: %s' %
(device, str(e)[:100] + '...'))
result[device] = None #PyTango.DevState.UNKNOWN
return result
class TServer(Object):
'''Class used by ServerDict to manage TangoDeviceServer admin devices.'''
def __init__(self,name='', host='', parent=None):
if not name or '/' not in name: raise Exception,'TServer_WrongServerName_%s' % name
self.info = None
self.name=self.get_simple_name(name)
self.update_level(host,0)
self.controlled = False
self.level = 0
self._classes = None
self.state=None #PyTango.DevState.UNKNOWN
self.log = Logger('TServer-%s'%name)
if parent and parent.log.getLogLevel(): self.log.setLogLevel(parent.log.getLogLevel())
else: self.log.setLogLevel('ERROR')
self.state_lock = threading.Lock()
if parent: self.proxies=parent.proxies
else: self.proxies=ProxiesDict()
pass
def set_state(self,state):
self.state_lock.acquire()
self.state=state
self.state_lock.release()
def ping(self,dname=None):
'''Executes .ping() and .state() methods of the admin device.'''
name = dname or self.get_admin_name()
wait = threading.Event().wait
if not dname: self.set_state(None)
try: proxy = self.get_proxy(name)
except:
self.log.error('%s.ping() ... %s not in database!!!' % (self.name,name))
return None
wait(.01) #this wait allows parallel threads
try: proxy.ping()
except:
#self.log.debug( '%s.ping() ... Alive'%s_name)
return None
if not dname: self.set_state(PyTango.DevState.FAULT) #Device pings but its state is not readable (ZOMBIE)
wait(.01) #this wait allows parallel threads
try:
result = proxy.state()
if not dname: self.set_state(result)
return result
except:
if not dname: return self.state
else: return None
def init_from_db(self,db=None,load_devices=False):
""" Gets name, classes, devices, host, level information from Tango Database. """
self._db = db or (self._db if hasattr(self,'_db') else PyTango.Database())
#print ('init_from_db(%s,%s,%s)'%(self.name,get_tango_host(self._db),load_devices))
self.info = self._db.get_server_info(self.name)
di = get_device_info('dserver/'+self.name,db=self._db) #get_server_info() must be combined with get_device_info to obtain the real name of the launcher
self.name = di.server
self.update_level(self.info.host,self.info.level)
if load_devices: self.get_classes()
def update_level(self,host,level=0):
""" It only initializes the values, does not get values from database. """
self.controlled = True if host or level else False
if type(level) is str: level=level.strip()
if self.controlled: self.host,self.level = host.split('.')[0].strip(),trial(int,args=level,excepts=0)
else: self.host,self.level = '',0
def get_classes(self,load=False):
if not load and self._classes is not None:
return self._classes
devs = self._db.get_device_class_list(self.name)
self._classes = collections.defaultdict(list)
#print 'loading from %s server:%s'%(s,str(devs))
for i in range(0,len(devs),2):
klass = devs[i+1]
self._classes[klass].append(devs[i].lower())
return self._classes
classes = property(fget=get_classes)
def get_server_level(self):
""" It returns initialized values, does not get values from database. """
if self.controlled and self.host: return self.host,self.level
else: return '',0
def get_simple_name(self,name=''):
'''Returns the name of the server in the Server/Instance format.'''
name = name or self.name
return name if name.count('/')==1 else name.split('/',1)[1]
def get_tango_host(self):
return get_tango_host(self._db)
def get_admin_name(self):
'''Returns the name of the server in the dserver/Server/Instance format.'''
n = 'dserver/'+self.name if self.name.count('/')==1 else self.name
return self.get_tango_host()+'/'+n
def get_starter_name(self):
"""Returns the starter on charge of controlling this server."""
n = 'tango/admin/%s' % self.host if self.host else None
return self.get_tango_host()+'/'+n
def get_device_list(self):
'''Returns a list of devices declared for this server.'''
result=[]
[result.extend(v) for c,v in self.classes.items() if c.lower()!='dserver']
return result
def get_proxy(self,device=''):
'''Returns a proxy to the given device; or the admin device if no device name is provided.'''
if device and ':' not in device:
device = self.get_tango_host()+'/'+device
device = device or self.get_admin_name()
return self.proxies.get(device)
def get_admin(self): return self.get_proxy()
def get_device(self,device): return self.get_proxy(device)
def get_all_states(self):
"""Returns a dictionary with the individual states of the inner devices."""
result = {}
for klass in self.classes:
for device in self.classes[klass]:
try:
result[device] = self.proxies[device].State()
except Exception,e:
self.log.warning('Unable to read %s state: %s' % (device,str(e)[:100]+'...'))
result[device] = None #PyTango.DevState.UNKNOWN
return result
