def start(self):
if not self.running:
if not self.parent.is_open():
self.parent.open()
self.csafe = CSafe(self.parent) #port
if feu_poll_thread:
#global feu_poll_thread
feu_poll_thread.add_feu(self) #register with the status loop
CompositeNode.start(self)
self.running = 1
class FEU(CompositeNode, AutoDiscoveredNode, EventProducerMixin):
def __init__(self):
self.running = 0
self._children_have_been_discovered = 0
CompositeNode.__init__(self)
AutoDiscoveredNode.__init__(self)
EventProducerMixin.__init__(self)
self.csafe = None
self._mutex = threading.Lock() #preven multiple io operations
self.ttl = 10
self.feu_state = None
self.cov = ChangeOfValueEvent(self, None, self.feu_state)
self.description = None
def default_name(self):
return 'FEU' #only one per port so no need to individualize it like for a aerocomm client
def configure(self, dict):
CompositeNode.configure(self, dict)
set_attribute(self, 'ttl', self.ttl, dict, float)
def configuration(self):
config = CompositeNode.configuration(self)
get_attribute(self, 'ttl', config, str)
return config
def start(self):
if not self.running:
if not self.parent.is_open():
self.parent.open()
self.csafe = CSafe(self.parent) #port
if feu_poll_thread:
#global feu_poll_thread
feu_poll_thread.add_feu(self) #register with the status loop
CompositeNode.start(self)
self.running = 1
def _discover_children(self):
if self.debug: print 'FEU io group discover children'
if self.running and not self._children_have_been_discovered: #empty
self._children_have_been_discovered = 1
answer = {}
keys = self._get_attribute_node_names()
for k in keys:
child = _PropAttr() #note this could be just the class, not the instance
if self.debug: print 'IO point: %s discovered child: %s' % (self.name, k)
answer[k] = child
return answer
return self._nascent_children
def update_state(self, new_state):
if new_state is None: return
if self.feu_state != new_state:
try:
new_state = status_text[new_state] #make sure its an enumerated value
except:
pass
if self.debug: print 'update feu state, old state: %s new state: %s' % (str(self.feu_state), str(new_state))
self.cov.old_value = self.feu_state
self.feu_state = new_state
self.cov.value = new_state
self.event_generate(self.cov)
def get(self, skipCache=0):
return self.feu_state
def _get_attribute_node_names(self):
return self.csafe.properties.keys() + ['description']
def _get_attr_value(self, name, skipCache=0):
#if self.parent.transceiver_state in ('transceiver_responding','exception_in_xmit'):
state, value = self.csafe.get(name)
self.update_state(state)
return value
def _allow_set(self, name):
if name == 'description':
return 1
return 0
def get_status(self): #must be called either with the lock locked
return self._get_attr_value('Status')
