def reInit(self):
"""Reinitialize the singleton"""
self._default_tango_host = None
self.dft_db = None
self.tango_db = CaselessWeakValueDict()
self.tango_db_queries = CaselessWeakValueDict()
self.tango_attrs = CaselessWeakValueDict()
self.tango_devs = CaselessWeakValueDict()
self.tango_dev_queries = CaselessWeakValueDict()
self.tango_alias_devs = CaselessWeakValueDict()
self.polling_timers = {}
# Plugin device classes
self.tango_dev_klasses = {}
# Plugin attribute classes
self.tango_attr_klasses = CaselessDict()
class TangoFactory(Singleton, TaurusFactory, Logger):
"""A :class:`TaurusFactory` singleton class to provide Tango-specific
Taurus Element objects (TangoAuthority, TangoDevice, TangoAttribute,
TangoConfiguration)
Tango model names are URI based See https://tools.ietf.org/html/rfc3986.
For example, a TangoAttribute would be::
tango://foo.org:1234/a/b/c/d#label
\___/ \_____/ \__/ \_____/ \___/
| | | | |
| hostname port attr |
| \____________/\______/ |
| | | |
scheme authority path fragment
For Tango Elements:
- The 'scheme' must be the string "tango" (lowercase mandatory)
- The 'authority' is the Tango database (<hostname> and <port> mandatory)
- The 'path' is the Tango object, which can be a Device or Attribute.
For device it must have the format _/_/_ or alias
For attribute it must have the format _/_/_/_ or devalias/_
- The 'fragment' is optional and it refers to an attribute of the model
object, thus not being part of the model name itself
"""
#: the list of schemes that this factory supports. For this factory: 'tango'
#: is the only scheme
schemes = ("tango", )
caseSensitive = False
elementTypesMap = {
TaurusElementType.Authority: TangoAuthority,
TaurusElementType.Device: TangoDevice,
TaurusElementType.Attribute: TangoAttribute
}
def __init__(self):
""" Initialization. Nothing to be done here for now."""
pass
def init(self, *args, **kwargs):
"""Singleton instance initialization.
**For internal usage only**"""
name = self.__class__.__name__
self.call__init__(Logger, name)
self.call__init__(TaurusFactory)
self._polling_enabled = True
self.reInit()
self.scheme = 'tango'
def reInit(self):
"""Reinitialize the singleton"""
self._default_tango_host = None
self.dft_db = None
self.tango_db = CaselessWeakValueDict()
self.tango_db_queries = CaselessWeakValueDict()
self.tango_attrs = CaselessWeakValueDict()
self.tango_devs = CaselessWeakValueDict()
self.tango_dev_queries = CaselessWeakValueDict()
self.tango_alias_devs = CaselessWeakValueDict()
self.polling_timers = {}
# Plugin device classes
self.tango_dev_klasses = {}
# Plugin attribute classes
self.tango_attr_klasses = CaselessDict()
def cleanUp(self):
"""Cleanup the singleton instance"""
self.trace("[TangoFactory] cleanUp")
for k, v in self.tango_attrs.items():
v.cleanUp()
for k, v in self.tango_dev_queries.items():
v.cleanUp()
for k, v in self.tango_devs.items():
v.cleanUp()
self.dft_db = None
for k, v in self.tango_db_queries.items():
v.cleanUp()
for k, v in self.tango_db.items():
v.cleanUp()
self.reInit()
def getExistingAttributes(self):
"""Returns a new dictionary will all registered attributes on this factory
:return: dictionary will all registered attributes on this factory
:rtype: dict"""
return dict(self.tango_attrs)
def getExistingDevices(self):
"""Returns a new dictionary will all registered devices on this factory
:return: dictionary will all registered devices on this factory
:rtype: dict"""
return dict(self.tango_devs)
def getExistingDatabases(self):
"""Returns a new dictionary will all registered databases on this factory
:return: dictionary will all registered databases on this factory
:rtype: dict"""
return dict(self.tango_db)
def set_default_tango_host(self, tango_host):
"""Sets the new default tango host.
:param tango_host: (str) the new tango host
"""
self._default_tango_host = tango_host
self.dft_db = None
def registerAttributeClass(self, attr_name, attr_klass):
"""Registers a new attribute class for the attribute name.
:param attr_name: (str) attribute name
:param attr_klass: (taurus.core.tango.TangoAttribute) the new class that
will handle the attribute
"""
self.tango_attr_klasses[attr_name] = attr_klass
def unregisterAttributeClass(self, attr_name):
"""Unregisters the attribute class for the given attribute
If no class was registered before for the given attribute, this call
as no effect
:param attr_name: (str) attribute name
"""
if self.tango_attr_klasses.has_key(attr_name):
del self.tango_attr_klasses[attr_name]
def registerDeviceClass(self, dev_klass_name, dev_klass):
"""Registers a new python class to handle tango devices of the given tango class name
:param dev_klass_name: (str) tango device class name
:param dev_klass: (taurus.core.tango.TangoDevice) the new class that will
handle devices of the given tango class name
"""
self.tango_dev_klasses[dev_klass_name] = dev_klass
def unregisterDeviceClass(self, dev_klass_name):
"""Unregisters the class for the given tango class name
If no class was registered before for the given attribute, this call
as no effect
:param dev_klass_name: (str) tango device class name
"""
if self.tango_dev_klasses.has_key(dev_klass_name):
del self.tango_dev_klasses[dev_klass_name]
def getDatabase(self, name=None):
'''Deprecated. Use getAuthority instead'''
return self.getAuthority(name=name)
def getAuthority(self, name=None):
"""
Obtain the object corresponding to the given database name or the
default database if name is None.
If the corresponding authority object already exists, the existing
instance is returned. Otherwise a new instance is stored and returned.
:param name: (str) database name string alias. If None, the
default database is used
:return: (taurus.core.tangodatabase.TangoAuthority) database object
:raise: (taurus.core.taurusexception.TaurusException) if the given alias is invalid.
"""
ret = None
if name is None:
if self.dft_db is None:
try:
if self._default_tango_host is None:
self.dft_db = _Authority()
else:
name = self._default_tango_host
validator = _Authority.getNameValidator()
groups = validator.getUriGroups(name)
if groups is None:
raise TaurusException(
"Invalid default Tango authority name %s" %
name)
self.dft_db = _Authority(host=groups['host'],
port=groups['port'])
except:
self.debug("Could not create Authority", exc_info=1)
raise
name = self.dft_db.getFullName()
self.tango_db[name] = self.dft_db
ret = self.dft_db
else:
ret = self.tango_db.get(name)
if not ret is None:
return ret
validator = _Authority.getNameValidator()
groups = validator.getUriGroups(name)
if not validator.isValid(name):
raise TaurusException("Invalid Tango authority name %s" % name)
try:
ret = _Authority(host=groups['host'], port=groups['port'])
except:
self.debug("Could not create Authority %s",
groups['authority'],
exc_info=1)
self.tango_db[name] = ret
return ret
def getDevice(self, dev_name, create_if_needed=True, **kw):
"""Obtain the object corresponding to the given tango device name.
If the corresponding device already exists, the existing instance
is returned. Otherwise a new instance is stored and returned.
:param dev_name: (str) tango device name or tango alias for the
device. It must be a valid Tango device URI.
If authority is not explicit, the default Tango
Database will be used
:param create_if_needed: (bool) If True, the Device is created if it
did not exist previously. If False, it
returns None if it did not exist
:return: (taurus.core.tango.TangoDevice) a device object
:raise: (taurus.core.taurusexception.TaurusException) if the given
dev_name is invalid.
"""
d = self.tango_devs.get(dev_name)
if d is None:
d = self.tango_alias_devs.get(dev_name)
if d is not None:
return d
validator = _Device.getNameValidator()
groups = validator.getUriGroups(dev_name)
if groups is None:
raise TaurusException("Invalid Tango device name '%s'" % dev_name)
full_dev_name, _, _ = validator.getNames(dev_name)
if full_dev_name is None:
raise TaurusException("Cannot find full name of '%s'" % dev_name)
d = self.tango_devs.get(full_dev_name)
if not create_if_needed:
return d
if d is None:
try:
db = self.getAuthority(groups.get('authority'))
dev_klass = self._getDeviceClass(db=db,
devname=groups['devname'])
kw['storeCallback'] = self._storeDevice
kw['parent'] = db
d = dev_klass(full_dev_name, **kw)
# device objects will register themselves in this factory
# so there is no need to do it here
except DoubleRegistration:
d = self.tango_devs.get(full_dev_name)
except:
self.debug("Error creating device %s", dev_name, exc_info=1)
raise
return d
def getAttribute(self, attr_name, create_if_needed=True, **kwargs):
"""Obtain the object corresponding to the given attribute name.
If the corresponding attribute already exists, the existing instance
is returned. Otherwise a new instance is stored and returned.
:param attr_name: (str) a valid attribute name URI
:param create_if_needed: (bool) If True, the Attribute is created if
it did not already exist. If False,
None is returned if it did not exist
:return: (taurus.core.tangoattribute.TangoAttribute) attribute object
:raise: (taurus.core.taurusexception.TaurusException) if the given
alias is invalid.
"""
attr = self.tango_attrs.get(attr_name)
if attr is not None:
return attr
# Simple approach did not work. Lets build a proper device name
validator = _Attribute.getNameValidator()
groups = validator.getUriGroups(attr_name)
if groups is None:
raise TaurusException(
("Invalid Tango attribute name '%s'") % attr_name)
full_attr_name, _, _ = validator.getNames(attr_name)
if full_attr_name is None:
raise TaurusException("Cannot find full name of '%s'" % attr_name)
attr = self.tango_attrs.get(full_attr_name)
if attr is None:
dev_name = full_attr_name.rsplit('/', 1)[0]
try:
dev = self.getDevice(dev_name)
if dev is not None:
# Do another try in case the Device object created the attribute
# itself. This happens for the 'state' attribute
attr = self.tango_attrs.get(full_attr_name)
if attr is not None:
return attr
try:
attr_klass = self._getAttributeClass(
attr_name=attr_name)
kwargs['storeCallback'] = self._storeAttribute
if not kwargs.has_key('pollingPeriod'):
kwargs[
'pollingPeriod'] = self.getDefaultPollingPeriod(
)
attr = attr_klass(full_attr_name, dev, **kwargs)
# attribute objects will register themselves in this factory
# so there is no need to do it here
except DoubleRegistration:
attr = self.tango_attrs.get(full_attr_name)
except:
self.debug("Error creating attribute %s",
attr_name,
exc_info=1)
raise
return attr
def getAttributeInfo(self, full_attr_name):
"""Deprecated: Use :meth:`taurus.core.tango.TangoFactory.getConfiguration` instead.
Obtain attribute information corresponding to the given attribute name.
If the corresponding attribute info already exists, the existing information
is returned. Otherwise a new information instance is stored and returned.
:param full_attr_name: (str) attribute name in format: <tango device name>'/'<attribute name>
:return: (taurus.core.tango.TangoConfiguration) configuration object
"""
self.deprecated("Use getConfiguration(full_attr_name) instead")
attr = self.getAttribute(full_attr_name)
return attr
@tep14_deprecation(alt='getAttribute')
def getConfiguration(self, param):
"""Obtain the object corresponding to the given attribute or full name.
If the corresponding configuration already exists, the existing instance
is returned. Otherwise a new instance is stored and returned.
:param param: (taurus.core.taurusattribute.TaurusAttribute or str) attribute object or full configuration name
:return: (taurus.core.tango.TangoAttribute) configuration object
"""
if isinstance(param, str):
return self.getAttribute(param)
return param
def _getAttributeClass(self, **params):
attr_name = params.get("attr_name")
attr_klass = self.tango_attr_klasses.get(attr_name, _Attribute)
return attr_klass
def _getDeviceClass(self, **kwargs):
db, dev_name = kwargs.get("db"), kwargs.get("devname")
if db is None or dev_name is None or len(self.tango_dev_klasses) == 0:
return _Device
else:
if '/' not in dev_name: # we got an alias... find the devslashname
dev_name = db.getElementFullName(dev_name)
tango_dev_klass = db.get_class_for_device(dev_name)
return self.tango_dev_klasses.get(tango_dev_klass, _Device)
def _storeDevice(self, dev):
name, alias = dev.getFullName(), dev.getSimpleName()
exists = self.tango_devs.get(name)
if not exists is None:
if exists == dev:
msg = "%s has already been registered before" % name
else:
msg = "%s has already been registered before with a different object!" % name
self.debug(msg)
raise DoubleRegistration(msg)
self.tango_devs[name] = dev
if not alias is None and len(alias):
self.tango_alias_devs[alias] = dev
def _storeAttribute(self, attr):
name = attr.getFullName()
exists = self.tango_attrs.get(name)
if not exists is None:
if exists == attr:
msg = "%s has already been registered before" % name
else:
msg = "%s has already been registered before with a different object!" % name
self.debug(msg)
raise DoubleRegistration(msg)
self.tango_attrs[name] = attr
def getExistingAttribute(self, attr_name):
"""Deprecated: use getAtribute with create_if_needed=False
"""
self.warning(('getExistingAttribute is deprecated. ' +
'Use getDevice with create_if_needed=False'))
return self.getAttribute(attr_name, create_if_needed=False)
def getExistingDevice(self, dev_name):
"""Deprecated: use getDevice with create_if_needed=False
"""
self.warning(('getExistingDevice is deprecated. ' +
'Use getDevice with create_if_needed=False'))
return self.getDevice(dev_name, create_if_needed=False)
def removeExistingDevice(self, dev_or_dev_name):
"""Removes a previously registered device.
:param dev_or_dev_name: (str or TangoDevice) device name or device object
"""
if isinstance(dev_or_dev_name, _Device):
dev = dev_or_dev_name
else:
dev = self.getDevice(dev_or_dev_name, create_if_needed=False)
if dev is None:
raise KeyError("Device %s not found" % dev_or_dev_name)
dev.cleanUp()
full_name = dev.getFullName()
if self.tango_devs.has_key(full_name):
del self.tango_devs[full_name]
simp_name = dev.getSimpleName()
if self.tango_alias_devs.has_key(simp_name):
del self.tango_alias_devs[simp_name]
def removeExistingAttribute(self, attr_or_attr_name):
"""Removes a previously registered attribute.
:param attr_or_attr_name: (str or TangoAttribute) attribute name or attribute object
"""
if isinstance(attr_or_attr_name, _Attribute):
attr = attr_or_attr_name
else:
attr = self.getExistingAttribute(attr_or_attr_name)
if attr is None:
raise KeyError("Attribute %s not found" % attr_or_attr_name)
attr.cleanUp()
full_name = attr.getFullName()
if self.tango_attrs.has_key(full_name):
del self.tango_attrs[full_name]
def addAttributeToPolling(self, attribute, period, unsubscribe_evts=False):
"""Activates the polling (client side) for the given attribute with the
given period (seconds).
:param attribute: (taurus.core.tango.TangoAttribute) attribute name.
:param period: (float) polling period (in seconds)
:param unsubscribe_evts: (bool) whether or not to unsubscribe from events
"""
tmr = self.polling_timers.get(period, TaurusPollingTimer(period))
self.polling_timers[period] = tmr
tmr.addAttribute(attribute, self.isPollingEnabled())
def removeAttributeFromPolling(self, attribute):
"""Deactivate the polling (client side) for the given attribute. If the
polling of the attribute was not previously enabled, nothing happens.
:param attribute: (str) attribute name.
"""
p = None
for period, timer in self.polling_timers.iteritems():
if timer.containsAttribute(attribute):
timer.removeAttribute(attribute)
if timer.getAttributeCount() == 0:
p = period
break
if p:
del self.polling_timers[period]
def isPollingEnabled(self):
"""Tells if the local tango polling is enabled
:return: (bool) wheter or not the polling is enabled
"""
return self._polling_enabled
def disablePolling(self):
"""Disable the application tango polling"""
if not self.isPollingEnabled():
return
self._polling_enabled = False
for period, timer in self.polling_timers.iteritems():
timer.stop()
def enablePolling(self):
"""Enable the application tango polling"""
if self.isPollingEnabled():
return
for period, timer in self.polling_timers.iteritems():
timer.start()
self._polling_enabled = True
def getDatabaseNameValidator(self):
"""Deprecated"""
self.warning(('getDatabaseNameValidator is deprecated.' +
'Use "Authority" instead of "Database"'))
return self.getAuthorityNameValidator()
def getAuthorityNameValidator(self):
"""Return TangoAuthorityNameValidator"""
import tangovalidator
return tangovalidator.TangoAuthorityNameValidator()
def getDeviceNameValidator(self):
"""Return TangoDeviceNameValidator"""
import tangovalidator
return tangovalidator.TangoDeviceNameValidator()
def getAttributeNameValidator(self):
"""Return TangoAttributeNameValidator"""
import tangovalidator
return tangovalidator.TangoAttributeNameValidator()
def setOperationMode(self, mode):
""" Deprecated. setOperationMode(OperationMode mode) -> None
Sets the operation mode for the Tango system."""
dep = 'setOperationMode'
rel = 'Taurus4'
dbg_msg = "Don't use this method"
msg = '%s is deprecated (from %s). %s' % (dep, rel, dbg_msg)
self.deprecated(msg)
def getOperationMode(self):
"""Deprecated. Gives the current operation mode."""
dep = 'getOperationMode'
rel = 'Taurus4'
dbg_msg = "Don't use this method"
msg = '%s is deprecated (from %s). %s' % (dep, rel, dbg_msg)
self.deprecated(msg)
return OperationMode.ONLINE
def reInit(self):
"""Reinitialize the singleton"""
self._default_tango_host = None
self.dft_db = None
self.tango_db = CaselessWeakValueDict()
self.tango_db_queries = CaselessWeakValueDict()
self.tango_attrs = CaselessWeakValueDict()
self.tango_devs = CaselessWeakValueDict()
self.tango_dev_queries = CaselessWeakValueDict()
self.tango_alias_devs = CaselessWeakValueDict()
self.polling_timers = {}
# Plugin device classes
self.tango_dev_klasses = {}
# Plugin attribute classes
self.tango_attr_klasses = CaselessDict()
class TangoFactory(Singleton, TaurusFactory, Logger):
"""A :class:`TaurusFactory` singleton class to provide Tango-specific
Taurus Element objects (TangoAuthority, TangoDevice, TangoAttribute)
Tango model names are URI based See https://tools.ietf.org/html/rfc3986.
For example, a TangoAttribute would be::
tango://foo.org:1234/a/b/c/d#label
\___/ \_____/ \__/ \_____/ \___/
| | | | |
| hostname port attr |
| \____________/\______/ |
| | | |
scheme authority path fragment
For Tango Elements:
- The 'scheme' must be the string "tango" (lowercase mandatory)
- The 'authority' identifies the Tango database (<hostname> and <port>
are mandatory if authority is given)
- The 'path' identifies Tango Device and Attributes.
For devices it must have the format _/_/_ or alias
For attributes it must have the format _/_/_/_ or devalias/_
- The 'fragment' is optional and it refers to a member of the model
object, thus not being part of the model name itself
"""
#: the list of schemes that this factory supports. For this factory: 'tango'
#: is the only scheme
schemes = ("tango",)
caseSensitive = False
elementTypesMap = {TaurusElementType.Authority: TangoAuthority,
TaurusElementType.Device: TangoDevice,
TaurusElementType.Attribute: TangoAttribute
}
def __init__(self):
""" Initialization. Nothing to be done here for now."""
pass
def init(self, *args, **kwargs):
"""Singleton instance initialization.
**For internal usage only**"""
name = self.__class__.__name__
self.call__init__(Logger, name)
self.call__init__(TaurusFactory)
self._polling_enabled = True
self.reInit()
self.scheme = 'tango'
def reInit(self):
"""Reinitialize the singleton"""
self._default_tango_host = None
self.dft_db = None
self.tango_db = CaselessWeakValueDict()
self.tango_db_queries = CaselessWeakValueDict()
self.tango_attrs = CaselessWeakValueDict()
self.tango_devs = CaselessWeakValueDict()
self.tango_dev_queries = CaselessWeakValueDict()
self.tango_alias_devs = CaselessWeakValueDict()
self.polling_timers = {}
# Plugin device classes
self.tango_dev_klasses = {}
# Plugin attribute classes
self.tango_attr_klasses = CaselessDict()
def cleanUp(self):
"""Cleanup the singleton instance"""
self.trace("[TangoFactory] cleanUp")
for k, v in self.tango_attrs.items():
v.cleanUp()
for k, v in self.tango_dev_queries.items():
v.cleanUp()
for k, v in self.tango_devs.items():
v.cleanUp()
self.dft_db = None
for k, v in self.tango_db_queries.items():
v.cleanUp()
for k, v in self.tango_db.items():
v.cleanUp()
self.reInit()
def getExistingAttributes(self):
"""Returns a new dictionary will all registered attributes on this factory
:return: dictionary will all registered attributes on this factory
:rtype: dict"""
return dict(self.tango_attrs)
def getExistingDevices(self):
"""Returns a new dictionary will all registered devices on this factory
:return: dictionary will all registered devices on this factory
:rtype: dict"""
return dict(self.tango_devs)
def getExistingDatabases(self):
"""Returns a new dictionary will all registered databases on this factory
:return: dictionary will all registered databases on this factory
:rtype: dict"""
return dict(self.tango_db)
def set_default_tango_host(self, tango_host):
"""Sets the new default tango host.
:param tango_host: (str) the new tango host
"""
self._default_tango_host = tango_host
self.dft_db = None
def registerAttributeClass(self, attr_name, attr_klass):
"""Registers a new attribute class for the attribute name.
:param attr_name: (str) attribute name
:param attr_klass: (taurus.core.tango.TangoAttribute) the new class that
will handle the attribute
"""
self.tango_attr_klasses[attr_name] = attr_klass
def unregisterAttributeClass(self, attr_name):
"""Unregisters the attribute class for the given attribute
If no class was registered before for the given attribute, this call
as no effect
:param attr_name: (str) attribute name
"""
if self.tango_attr_klasses.has_key(attr_name):
del self.tango_attr_klasses[attr_name]
def registerDeviceClass(self, dev_klass_name, dev_klass):
"""Registers a new python class to handle tango devices of the given tango class name
:param dev_klass_name: (str) tango device class name
:param dev_klass: (taurus.core.tango.TangoDevice) the new class that will
handle devices of the given tango class name
"""
self.tango_dev_klasses[dev_klass_name] = dev_klass
def unregisterDeviceClass(self, dev_klass_name):
"""Unregisters the class for the given tango class name
If no class was registered before for the given attribute, this call
as no effect
:param dev_klass_name: (str) tango device class name
"""
if self.tango_dev_klasses.has_key(dev_klass_name):
del self.tango_dev_klasses[dev_klass_name]
def getDatabase(self, name=None):
'''Deprecated. Use getAuthority instead'''
return self.getAuthority(name=name)
def getAuthority(self, name=None):
"""
Obtain the object corresponding to the given database name or the
default database if name is None.
If the corresponding authority object already exists, the existing
instance is returned. Otherwise a new instance is stored and returned.
:param name: (str) database name string alias. If None, the
default database is used
:return: (taurus.core.tangodatabase.TangoAuthority) database object
:raise: (taurus.core.taurusexception.TaurusException) if the given alias is invalid.
"""
ret = None
if name is None:
if self.dft_db is None:
try:
if self._default_tango_host is None:
self.dft_db = _Authority()
else:
name = self._default_tango_host
validator = _Authority.getNameValidator()
groups = validator.getUriGroups(name)
if groups is None:
raise TaurusException(
"Invalid default Tango authority name %s" % name)
self.dft_db = _Authority(host=groups['host'],
port=groups['port'])
except:
self.debug("Could not create Authority", exc_info=1)
raise
name = self.dft_db.getFullName()
self.tango_db[name] = self.dft_db
ret = self.dft_db
else:
ret = self.tango_db.get(name)
if not ret is None:
return ret
validator = _Authority.getNameValidator()
groups = validator.getUriGroups(name)
if not validator.isValid(name):
raise TaurusException("Invalid Tango authority name %s" % name)
try:
ret = _Authority(host=groups['host'], port=groups['port'])
except:
self.debug("Could not create Authority %s", groups['authority'],
exc_info=1)
self.tango_db[name] = ret
return ret
def getDevice(self, dev_name, create_if_needed=True, **kw):
"""Obtain the object corresponding to the given tango device name.
If the corresponding device already exists, the existing instance
is returned. Otherwise a new instance is stored and returned.
:param dev_name: (str) tango device name or tango alias for the
device. It must be a valid Tango device URI.
If authority is not explicit, the default Tango
Database will be used
:param create_if_needed: (bool) If True, the Device is created if it
did not exist previously. If False, it
returns None if it did not exist
:return: (taurus.core.tango.TangoDevice) a device object
:raise: (taurus.core.taurusexception.TaurusException) if the given
dev_name is invalid.
"""
d = self.tango_devs.get(dev_name)
if d is None:
d = self.tango_alias_devs.get(dev_name)
if d is not None:
return d
validator = _Device.getNameValidator()
groups = validator.getUriGroups(dev_name)
if groups is None:
raise TaurusException("Invalid Tango device name '%s'" % dev_name)
full_dev_name, _, _ = validator.getNames(dev_name)
if full_dev_name is None:
raise TaurusException("Cannot find full name of '%s'" % dev_name)
d = self.tango_devs.get(full_dev_name)
if not create_if_needed:
return d
if d is None:
try:
db = self.getAuthority(groups.get('authority'))
dev_klass = self._getDeviceClass(
db=db, devname=groups['devname'])
kw['storeCallback'] = self._storeDevice
kw['parent'] = db
d = dev_klass(full_dev_name, **kw)
# device objects will register themselves in this factory
# so there is no need to do it here
except DoubleRegistration:
d = self.tango_devs.get(full_dev_name)
except:
self.debug("Error creating device %s", dev_name, exc_info=1)
raise
return d
def getAttribute(self, attr_name, create_if_needed=True, **kwargs):
"""Obtain the object corresponding to the given attribute name.
If the corresponding attribute already exists, the existing instance
is returned. Otherwise a new instance is stored and returned.
:param attr_name: (str) a valid attribute name URI
:param create_if_needed: (bool) If True, the Attribute is created if
it did not already exist. If False,
None is returned if it did not exist
:return: (taurus.core.tangoattribute.TangoAttribute) attribute object
:raise: (taurus.core.taurusexception.TaurusException) if the given
alias is invalid.
"""
attr = self.tango_attrs.get(attr_name)
if attr is not None:
return attr
# Simple approach did not work. Lets build a proper device name
validator = _Attribute.getNameValidator()
groups = validator.getUriGroups(attr_name)
if groups is None:
raise TaurusException(("Invalid Tango attribute name '%s'") %
attr_name)
full_attr_name, _, _ = validator.getNames(attr_name)
if full_attr_name is None:
raise TaurusException("Cannot find full name of '%s'" % attr_name)
attr = self.tango_attrs.get(full_attr_name)
if attr is None:
dev_name = full_attr_name.rsplit('/', 1)[0]
try:
dev = self.getDevice(dev_name)
if dev is not None:
# Do another try in case the Device object created the attribute
# itself. This happens for the 'state' attribute
attr = self.tango_attrs.get(full_attr_name)
if attr is not None:
return attr
try:
attr_klass = self._getAttributeClass(
attr_name=attr_name)
kwargs['storeCallback'] = self._storeAttribute
if not kwargs.has_key('pollingPeriod'):
kwargs[
'pollingPeriod'] = self.getDefaultPollingPeriod()
attr = attr_klass(full_attr_name, dev, **kwargs)
# attribute objects will register themselves in this factory
# so there is no need to do it here
except DoubleRegistration:
attr = self.tango_attrs.get(full_attr_name)
except:
self.debug("Error creating attribute %s",
attr_name, exc_info=1)
raise
return attr
def getAttributeInfo(self, full_attr_name):
"""Deprecated: Use :meth:`taurus.core.tango.TangoFactory.getConfiguration` instead.
Obtain attribute information corresponding to the given attribute name.
If the corresponding attribute info already exists, the existing information
is returned. Otherwise a new information instance is stored and returned.
:param full_attr_name: (str) attribute name in format: <tango device name>'/'<attribute name>
:return: (taurus.core.tango.TangoConfiguration) configuration object
"""
self.deprecated("Use getConfiguration(full_attr_name) instead")
attr = self.getAttribute(full_attr_name)
return attr
@taurus4_deprecation(alt='getAttribute')
def getConfiguration(self, param):
"""Obtain the object corresponding to the given attribute or full name.
If the corresponding configuration already exists, the existing instance
is returned. Otherwise a new instance is stored and returned.
:param param: (taurus.core.taurusattribute.TaurusAttribute or str)
attribute object or full configuration name
:return: (taurus.core.tango.TangoAttribute) configuration object
"""
if isinstance(param, str):
return self.getAttribute(param)
return param
def _getAttributeClass(self, **params):
attr_name = params.get("attr_name")
attr_klass = self.tango_attr_klasses.get(attr_name, _Attribute)
return attr_klass
def _getDeviceClass(self, **kwargs):
db, dev_name = kwargs.get("db"), kwargs.get("devname")
if db is None or dev_name is None or len(self.tango_dev_klasses) == 0:
return _Device
else:
if '/' not in dev_name: # we got an alias... find the devslashname
dev_name = db.getElementFullName(dev_name)
try:
tango_dev_klass = db.get_class_for_device(dev_name)
except PyTango.DevFailed:
# sometimes we can't get the class (e.g. dev_name not defined)
return _Device
return self.tango_dev_klasses.get(tango_dev_klass, _Device)
def _storeDevice(self, dev):
name, alias = dev.getFullName(), dev.getSimpleName()
exists = self.tango_devs.get(name)
if not exists is None:
if exists == dev:
msg = "%s has already been registered before" % name
else:
msg = "%s has already been registered before with a different object!" % name
self.debug(msg)
raise DoubleRegistration(msg)
self.tango_devs[name] = dev
if not alias is None and len(alias):
self.tango_alias_devs[alias] = dev
def _storeAttribute(self, attr):
name = attr.getFullName()
exists = self.tango_attrs.get(name)
if not exists is None:
if exists == attr:
msg = "%s has already been registered before" % name
else:
msg = "%s has already been registered before with a different object!" % name
self.debug(msg)
raise DoubleRegistration(msg)
self.tango_attrs[name] = attr
def getExistingAttribute(self, attr_name):
"""Deprecated: use getAtribute with create_if_needed=False
"""
self.warning(('getExistingAttribute is deprecated. ' +
'Use getDevice with create_if_needed=False'))
return self.getAttribute(attr_name, create_if_needed=False)
def getExistingDevice(self, dev_name):
"""Deprecated: use getDevice with create_if_needed=False
"""
self.warning(('getExistingDevice is deprecated. ' +
'Use getDevice with create_if_needed=False'))
return self.getDevice(dev_name, create_if_needed=False)
def removeExistingDevice(self, dev_or_dev_name):
"""Removes a previously registered device.
:param dev_or_dev_name: (str or TangoDevice) device name or device object
"""
if isinstance(dev_or_dev_name, _Device):
dev = dev_or_dev_name
else:
dev = self.getDevice(dev_or_dev_name, create_if_needed=False)
if dev is None:
raise KeyError("Device %s not found" % dev_or_dev_name)
dev.cleanUp()
full_name = dev.getFullName()
if self.tango_devs.has_key(full_name):
del self.tango_devs[full_name]
simp_name = dev.getSimpleName()
if self.tango_alias_devs.has_key(simp_name):
del self.tango_alias_devs[simp_name]
def removeExistingAttribute(self, attr_or_attr_name):
"""Removes a previously registered attribute.
:param attr_or_attr_name: (str or TangoAttribute) attribute name or attribute object
"""
if isinstance(attr_or_attr_name, _Attribute):
attr = attr_or_attr_name
else:
attr = self.getExistingAttribute(attr_or_attr_name)
if attr is None:
raise KeyError("Attribute %s not found" % attr_or_attr_name)
attr.cleanUp()
full_name = attr.getFullName()
if self.tango_attrs.has_key(full_name):
del self.tango_attrs[full_name]
def isPollingEnabled(self):
"""Tells if the local tango polling is enabled
:return: (bool) wheter or not the polling is enabled
"""
return self._polling_enabled
def disablePolling(self):
"""Disable the application tango polling"""
if not self.isPollingEnabled():
return
self._polling_enabled = False
for period, timer in self.polling_timers.iteritems():
timer.stop()
def enablePolling(self):
"""Enable the application tango polling"""
if self.isPollingEnabled():
return
for period, timer in self.polling_timers.iteritems():
timer.start()
self._polling_enabled = True
def getDatabaseNameValidator(self):
"""Deprecated"""
self.warning(('getDatabaseNameValidator is deprecated.' +
'Use "Authority" instead of "Database"'))
return self.getAuthorityNameValidator()
def getAuthorityNameValidator(self):
"""Return TangoAuthorityNameValidator"""
import tangovalidator
return tangovalidator.TangoAuthorityNameValidator()
def getDeviceNameValidator(self):
"""Return TangoDeviceNameValidator"""
import tangovalidator
return tangovalidator.TangoDeviceNameValidator()
def getAttributeNameValidator(self):
"""Return TangoAttributeNameValidator"""
import tangovalidator
return tangovalidator.TangoAttributeNameValidator()
def setOperationMode(self, mode):
""" Deprecated. setOperationMode(OperationMode mode) -> None
Sets the operation mode for the Tango system."""
dep = 'setOperationMode'
rel = 'Taurus4'
dbg_msg = "Don't use this method"
msg = '%s is deprecated (from %s). %s' % (dep, rel, dbg_msg)
self.deprecated(msg)
def getOperationMode(self):
"""Deprecated. Gives the current operation mode."""
dep = 'getOperationMode'
rel = 'Taurus4'
dbg_msg = "Don't use this method"
msg = '%s is deprecated (from %s). %s' % (dep, rel, dbg_msg)
self.deprecated(msg)
return OperationMode.ONLINE
