class GenericProperty(TypelessProperty):
'''
This intermediary class is used so certain methods in TypelessProperty-derived
IDL interfaces do not have to be needlessly duplicated.
'''
#--------------------------------------------------------------------------
def __init__(self, name, charCompRef, devIORef):
'''
Constructor
Params:
- name is the quite literally the name of the property
- charCompRef is the characteristic component object which contains this
property
- devIORef is a reference to a DevIO to be used with this property
Returns: Nothing
Raises: Nothing.
'''
TypelessProperty.__init__(self, name, charCompRef)
self.monitors = []
if devIORef == None:
self.value = DevIO(self._get_default_value())
else:
self.value = devIORef
return
#--------------------------------------------------------------------------
#--Helper methods to be overriden in subclasses----------------------------
#--------------------------------------------------------------------------
def coerceToPropertyType(self, value=None):
'''
This helper method MUST be overriden in subclasses. Basically it is used
to coerce a stringified value of the property type to its correct type.
'''
del value #to make pychecker happy
self.getLogger().logCritical(
"Looks like this method was never overriden in a subclass!")
raise NO_IMPLEMENT()
#--------------------------------------------------------------------------
def getMonitorObject(self, scheduler, timeoutID):
'''
Helper method.
'''
del scheduler #to make pychecker happy
del timeoutID #to make pychecker happy
self.getLogger().logCritical(
"Looks like this method was never overriden in a subclass!")
raise NO_IMPLEMENT()
#--------------------------------------------------------------------------
#--From "P" properties-----------------------------------------------------
#--------------------------------------------------------------------------
def _get_default_timer_trigger(self):
'''
Implementation of the IDL attribute.
readonly attribute TimeInterval default_timer_trigger;
'''
try:
return long(
float(self.getCDBDict()['default_timer_trig']) * 10000000.0)
except:
#warn them about CDB access
self.getLogger().logInfo(
"Some problem occurred when attempting to retrieve default timer trigger data from the ACS CDB"
)
print_exc()
#return an acceptable default value instead... 0.1 seconds
return 1000000L
#--------------------------------------------------------------------------
def _get_min_timer_trigger(self):
'''
Implementation of the IDL attribute.
readonly attribute TimeInterval min_timer_trigger;
'''
try:
return long(
float(self.getCDBDict()['min_timer_trig']) * 10000000.0)
except:
#warn them about CDB access
self.getLogger().logInfo(
"Some problem occurred when attempting to retrieve minimum timer trigger data from the ACS CDB"
)
print_exc()
#return an acceptable default value instead... 0.001 seconds
return 10000L
#--------------------------------------------------------------------------
def _get_min_delta_trigger(self):
'''
Implementation of the IDL attribute.
readonly attribute (unknown type) min_delta_trigger;
'''
try:
return self.coerceToPropertyType(
str(self.getCDBDict()['min_delta_trig']))
except:
#warn them about CDB access
self.getLogger().logInfo(
"Some problem occurred when attempting to retrieve data from the ACS CDB"
)
print_exc()
#return an acceptable default value instead. It's up to the overriden
#coerceToPropertyType method to decide what an acceptable default
#value is!
return self.coerceToPropertyType(str(0))
#--------------------------------------------------------------------------
def _get_default_value(self):
'''
Implementation of the IDL attribute.
readonly attribute (unknown type) default_value;
'''
try:
return self.coerceToPropertyType(
str(self.getCDBDict()['default_value']))
except:
#warn them about CDB access
self.getLogger().logInfo(
"Some problem occurred when attempting to retrieve data from the ACS CDB"
)
print_exc()
#return an acceptable default value instead. It's up to the overriden
#coerceToPropertyType method to decide what an acceptable default
#value is!
return self.coerceToPropertyType(None)
#--------------------------------------------------------------------------
def _get_graph_min(self):
'''
Implementation of the IDL attribute.
readonly attribute (unknown type) graph_min;
'''
try:
return self.coerceToPropertyType(
str(self.getCDBDict()['graph_min']))
except:
#warn them about CDB access
self.getLogger().logInfo(
"Some problem occurred when attempting to retrieve data from the ACS CDB"
)
print_exc()
#return an acceptable default value instead.
return self.coerceToPropertyType(str(0))
#--------------------------------------------------------------------------
def _get_graph_max(self):
'''
Implementation of the IDL attribute.
readonly attribute (unknown type) graph_max;
'''
try:
return self.coerceToPropertyType(
str(self.getCDBDict()['graph_max']))
except:
#warn them about CDB access
self.getLogger().logInfo(
"Some problem occurred when attempting to retrieve data from the ACS CDB"
)
print_exc()
#return an acceptable default value instead.
return self.coerceToPropertyType(str(1000))
#--------------------------------------------------------------------------
def _get_min_step(self):
'''
Implementation of the IDL attribute.
readonly attribute (unknown type) min_step;
'''
try:
return self.coerceToPropertyType(str(
self.getCDBDict()['min_step']))
except:
#warn them about CDB access
self.getLogger().logInfo(
"Some problem occurred when attempting to retrieve data from the ACS CDB"
)
print_exc()
#return an acceptable default value instead. It's up to the overriden
#coerceToPropertyType method to decide what an acceptable default
#value is!
return self.coerceToPropertyType(str(0))
#--------------------------------------------------------------------------
def get_sync(self):
'''
Implementation of the IDL method.
stringSeq get_sync (out ACSErr::Completion c);
'''
try:
#first just try to get the value from the DevIO...
retVal = self.value.read()
#in order to provide the same interface as the C++ DevIOs,
#a Python DevIO is expected to pass back a list of value
#and timestamp. To preserve backward compatablity, if the
#DevIO does not return a tuple, a timestamp will be generated
#as before.
if isinstance(retVal, tuple):
ts = retVal[-1]
retVal = retVal[0]
else:
ts = long(getTimeStamp().value)
#succeeded! now just create a "no-error" completion
compl = Completion(
ts, #unsigned long long timeStamp;
0L, #ACSErr::CompletionType type;
0L, #ACSErr::CompletionCode code;
()) #ErrorLinkedList previousError;
except Exception, e:
self.getLogger().logAlert(
"Some problem occurred when accessing the DevIO's read method")
print_exc()
#whoops...something failed. use the default value as a return
#value instead. this is bad to do but get_sync does not throw
#IDL exceptions!
retVal = self._get_default_value()
#let's see if it raised an ACS Error
#System exception first...
try:
compl = CouldntAccessPropertyCompletionImpl(exception=e)
except:
#a native Python exception was raised...not much we can do
#here
compl = CouldntAccessPropertyCompletionImpl()
return (retVal, compl)
class GenericProperty(TypelessProperty):
'''
This intermediary class is used so certain methods in TypelessProperty-derived
IDL interfaces do not have to be needlessly duplicated.
'''
#--------------------------------------------------------------------------
def __init__(self, name, charCompRef, devIORef):
'''
Constructor
Params:
- name is the quite literally the name of the property
- charCompRef is the characteristic component object which contains this
property
- devIORef is a reference to a DevIO to be used with this property
Returns: Nothing
Raises: Nothing.
'''
TypelessProperty.__init__(self, name, charCompRef)
self.monitors=[]
if devIORef==None:
self.value = DevIO(self._get_default_value())
else:
self.value = devIORef
return
#--------------------------------------------------------------------------
#--Helper methods to be overriden in subclasses----------------------------
#--------------------------------------------------------------------------
def coerceToPropertyType(self, value=None):
'''
This helper method MUST be overriden in subclasses. Basically it is used
to coerce a stringified value of the property type to its correct type.
'''
del value #to make pychecker happy
self.getLogger().logCritical("Looks like this method was never overriden in a subclass!")
raise NO_IMPLEMENT()
#--------------------------------------------------------------------------
def getMonitorObject(self, scheduler, timeoutID):
'''
Helper method.
'''
del scheduler #to make pychecker happy
del timeoutID #to make pychecker happy
self.getLogger().logCritical("Looks like this method was never overriden in a subclass!")
raise NO_IMPLEMENT()
#--------------------------------------------------------------------------
#--From "P" properties-----------------------------------------------------
#--------------------------------------------------------------------------
def _get_default_timer_trigger(self):
'''
Implementation of the IDL attribute.
readonly attribute TimeInterval default_timer_trigger;
'''
try:
return long(float(self.getCDBDict()['default_timer_trig']) * 10000000.0)
except:
#warn them about CDB access
self.getLogger().logInfo("Some problem occurred when attempting to retrieve default timer trigger data from the ACS CDB")
print_exc()
#return an acceptable default value instead... 0.1 seconds
return 1000000L
#--------------------------------------------------------------------------
def _get_min_timer_trigger(self):
'''
Implementation of the IDL attribute.
readonly attribute TimeInterval min_timer_trigger;
'''
try:
return long(float(self.getCDBDict()['min_timer_trig']) * 10000000.0)
except:
#warn them about CDB access
self.getLogger().logInfo("Some problem occurred when attempting to retrieve minimum timer trigger data from the ACS CDB")
print_exc()
#return an acceptable default value instead... 0.001 seconds
return 10000L
#--------------------------------------------------------------------------
def _get_min_delta_trigger(self):
'''
Implementation of the IDL attribute.
readonly attribute (unknown type) min_delta_trigger;
'''
try:
return self.coerceToPropertyType(str(self.getCDBDict()['min_delta_trig']))
except:
#warn them about CDB access
self.getLogger().logInfo("Some problem occurred when attempting to retrieve data from the ACS CDB")
print_exc()
#return an acceptable default value instead. It's up to the overriden
#coerceToPropertyType method to decide what an acceptable default
#value is!
return self.coerceToPropertyType(str(0))
#--------------------------------------------------------------------------
def _get_default_value(self):
'''
Implementation of the IDL attribute.
readonly attribute (unknown type) default_value;
'''
try:
return self.coerceToPropertyType(str(self.getCDBDict()['default_value']))
except:
#warn them about CDB access
self.getLogger().logInfo("Some problem occurred when attempting to retrieve data from the ACS CDB")
print_exc()
#return an acceptable default value instead. It's up to the overriden
#coerceToPropertyType method to decide what an acceptable default
#value is!
return self.coerceToPropertyType(None)
#--------------------------------------------------------------------------
def _get_graph_min(self):
'''
Implementation of the IDL attribute.
readonly attribute (unknown type) graph_min;
'''
try:
return self.coerceToPropertyType(str(self.getCDBDict()['graph_min']))
except:
#warn them about CDB access
self.getLogger().logInfo("Some problem occurred when attempting to retrieve data from the ACS CDB")
print_exc()
#return an acceptable default value instead.
return self.coerceToPropertyType(str(0))
#--------------------------------------------------------------------------
def _get_graph_max(self):
'''
Implementation of the IDL attribute.
readonly attribute (unknown type) graph_max;
'''
try:
return self.coerceToPropertyType(str(self.getCDBDict()['graph_max']))
except:
#warn them about CDB access
self.getLogger().logInfo("Some problem occurred when attempting to retrieve data from the ACS CDB")
print_exc()
#return an acceptable default value instead.
return self.coerceToPropertyType(str(1000))
#--------------------------------------------------------------------------
def _get_min_step(self):
'''
Implementation of the IDL attribute.
readonly attribute (unknown type) min_step;
'''
try:
return self.coerceToPropertyType(str(self.getCDBDict()['min_step']))
except:
#warn them about CDB access
self.getLogger().logInfo("Some problem occurred when attempting to retrieve data from the ACS CDB")
print_exc()
#return an acceptable default value instead. It's up to the overriden
#coerceToPropertyType method to decide what an acceptable default
#value is!
return self.coerceToPropertyType(str(0))
#--------------------------------------------------------------------------
def get_sync(self):
'''
Implementation of the IDL method.
stringSeq get_sync (out ACSErr::Completion c);
'''
try:
#first just try to get the value from the DevIO...
retVal = self.value.read()
#in order to provide the same interface as the C++ DevIOs,
#a Python DevIO is expected to pass back a list of value
#and timestamp. To preserve backward compatablity, if the
#DevIO does not return a tuple, a timestamp will be generated
#as before.
if isinstance(retVal,tuple):
ts = retVal[-1]
retVal = retVal[0]
else:
ts = long(getTimeStamp().value)
#succeeded! now just create a "no-error" completion
compl = Completion(ts, #unsigned long long timeStamp;
0L, #ACSErr::CompletionType type;
0L, #ACSErr::CompletionCode code;
()) #ErrorLinkedList previousError;
except Exception, e:
self.getLogger().logAlert("Some problem occurred when accessing the DevIO's read method")
print_exc()
#whoops...something failed. use the default value as a return
#value instead. this is bad to do but get_sync does not throw
#IDL exceptions!
retVal = self._get_default_value()
#let's see if it raised an ACS Error
#System exception first...
try:
compl = CouldntAccessPropertyCompletionImpl(exception=e)
except:
#a native Python exception was raised...not much we can do
#here
compl = CouldntAccessPropertyCompletionImpl()
return (retVal, compl)
