#!/usr/bin/env python
##############################################################################
##
# This file is part of Sardana
##
# http://www.sardana-controls.org/
##
# Copyright 2011 CELLS / ALBA Synchrotron, Bellaterra, Spain
##
# Sardana is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
##
# Sardana is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
##
# You should have received a copy of the GNU Lesser General Public License
# along with Sardana. If not, see <http://www.gnu.org/licenses/>.
##
##############################################################################
""" """
__all__ = ["Controller", "ControllerClass"]
__docformat__ = 'restructuredtext'
import time
from PyTango import Util, DevFailed, Except
from PyTango import DevVoid, DevLong, DevString
from PyTango import DevVarStringArray, DevVarLongArray
from PyTango import DispLevel, DevState, AttrQuality
from PyTango import SCALAR, SPECTRUM
from PyTango import READ_WRITE, READ
from taurus.core.util.log import DebugIt
from taurus.core.util.containers import CaselessDict
from sardana import DataType, DataFormat
from sardana import State, SardanaServer
from sardana.sardanaattribute import SardanaAttribute
from sardana.tango.core.util import to_tango_attr_info
from PoolDevice import PoolDevice, PoolDeviceClass
def to_bool(s):
return s.lower() == "true"
[docs]class Controller(PoolDevice):
def __init__(self, dclass, name):
PoolDevice.__init__(self, dclass, name)
[docs] def init(self, name):
PoolDevice.init(self, name)
[docs] def get_ctrl(self):
return self.element
[docs] def set_ctrl(self, ctrl):
self.element = ctrl
ctrl = property(get_ctrl, set_ctrl)
@DebugIt()
def delete_device(self):
PoolDevice.delete_device(self)
@DebugIt()
def init_device(self):
PoolDevice.init_device(self)
detect_evts = "state", "status"
non_detect_evts = "elementlist",
self.set_change_events(detect_evts, non_detect_evts)
ctrl = self.ctrl
if ctrl is None:
role_ids = self.get_role_ids()
full_name = self.get_full_name()
name = self.alias or full_name
args = dict(type=self.Type, name=name, full_name=full_name,
library=self.Library, klass=self.Klass,
id=self.Id, role_ids=role_ids,
properties=self._get_ctrl_properties())
ctrl = self.pool.create_controller(**args)
ctrl.add_listener(self.on_controller_changed)
self.ctrl = ctrl
self.set_state(DevState.ON)
# self.set_state(to_tango_state(ctrl.get_state()))
# self.set_status(ctrl.get_status())
else:
ctrl.re_init()
[docs] def get_role_ids(self):
db = Util.instance().get_database()
if db is None:
return []
role_ids = db.get_device_property(self.get_name(), ['motor_role_ids'])[
'motor_role_ids']
if len(role_ids) == 0:
role_ids = db.get_device_property(self.get_name(), ['counter_role_ids'])[
'counter_role_ids']
if len(role_ids) == 0:
role_ids = self.Role_ids
role_ids = map(int, role_ids)
return role_ids
def _get_ctrl_properties(self):
try:
ctrl_info = self.pool.get_controller_class_info(self.Klass)
prop_infos = ctrl_info.ctrl_properties
except:
return {}
db = Util.instance().get_database()
if db is None:
return {}
props = {}
if prop_infos:
props.update(db.get_device_property(
self.get_name(), prop_infos.keys()))
for p in props.keys():
if len(props[p]) == 0:
props[p] = None
ret = {}
missing_props = []
for prop_name, prop_value in props.items():
if prop_value is None:
dv = prop_infos[prop_name].default_value
if dv is None:
missing_props.append(prop_name)
ret[prop_name] = dv
continue
prop_info = prop_infos[prop_name]
dtype, dformat = prop_info.dtype, prop_info.dformat
op = str
if dtype == DataType.Integer:
op = int
elif dtype == DataType.Double:
op = float
elif dtype == DataType.Boolean:
op = to_bool
prop_value = map(op, prop_value)
if dformat == DataFormat.Scalar:
prop_value = prop_value[0]
ret[prop_name] = prop_value
if missing_props:
self.set_state(DevState.ALARM)
missing_props = ", ".join(missing_props)
self.set_status("Controller has missing properties: %s"
% missing_props)
return ret
[docs] def always_executed_hook(self):
pass
[docs] def read_attr_hardware(self, data):
pass
[docs] def dev_state(self):
if self.ctrl is None or not self.ctrl.is_online():
return DevState.FAULT
return DevState.ON
[docs] def dev_status(self):
if self.ctrl is None or not self.ctrl.is_online():
self._status = self.ctrl.get_ctrl_error_str()
else:
self._status = PoolDevice.dev_status(self)
return self._status
[docs] def read_ElementList(self, attr):
attr.set_value(self.get_element_names())
[docs] def CreateElement(self, argin):
pass
[docs] def DeleteElement(self, argin):
pass
[docs] def get_element_names(self):
elements = self.ctrl.get_elements()
return [elements[id].get_name() for id in sorted(elements)]
[docs] def on_controller_changed(self, event_src, event_type, event_value):
# during server startup and shutdown avoid processing element
# creation events
if SardanaServer.server_state != State.Running:
return
timestamp = time.time()
name = event_type.name.lower()
multi_attr = self.get_device_attr()
try:
attr = multi_attr.get_attr_by_name(name)
except DevFailed:
return
quality = AttrQuality.ATTR_VALID
priority = event_type.priority
error = None
if name == "state":
event_value = self.calculate_tango_state(event_value)
elif name == "status":
event_value = self.calculate_tango_status(event_value)
else:
if isinstance(event_value, SardanaAttribute):
if event_value.error:
error = Except.to_dev_failed(*event_value.exc_info)
timestamp = event_value.timestamp
event_value = event_value.value
self.set_attribute(attr, value=event_value, timestamp=timestamp,
quality=quality, priority=priority, error=error,
synch=False)
[docs] def get_dynamic_attributes(self):
if hasattr(self, "_dynamic_attributes_cache"):
return self._standard_attributes_cache, self._dynamic_attributes_cache
info = self.ctrl.ctrl_info
if info is None:
self.warning(
"Controller %s doesn't have any information", self.ctrl)
return PoolDevice.get_dynamic_attributes(self)
self._dynamic_attributes_cache = dyn_attrs = CaselessDict()
self._standard_attributes_cache = std_attrs = CaselessDict()
for attr_name, attr_data in info.ctrl_attributes.items():
name, tg_info = to_tango_attr_info(attr_name, attr_data)
dyn_attrs[attr_name] = attr_name, tg_info, attr_data
return std_attrs, dyn_attrs
[docs] def read_DynamicAttribute(self, attr):
attr_name = attr.get_name()
attr.set_value(self.ctrl.get_ctrl_attr(attr_name))
[docs] def write_DynamicAttribute(self, attr):
v = attr.get_write_value()
attr_name = attr.get_name()
self.ctrl.set_ctrl_attr(attr_name, v)
[docs] def read_LogLevel(self, attr):
l = self.ctrl.get_log_level()
self.debug(l)
attr.set_value(l)
[docs] def write_LogLevel(self, attr):
self.ctrl.set_log_level(attr.get_write_value())
[docs]class ControllerClass(PoolDeviceClass):
# Class Properties
class_property_list = {
}
class_property_list.update(PoolDeviceClass.class_property_list)
# Device Properties
device_property_list = {
'Type': [DevString, "", None],
'Library': [DevString, "", None],
'Klass': [DevString, "", None],
'Role_ids': [DevVarLongArray, "", []],
}
device_property_list.update(PoolDeviceClass.device_property_list)
# Command definitions
cmd_list = {
'CreateElement': [[DevVarStringArray, ""], [DevVoid, ""]],
'DeleteElement': [[DevString, ""], [DevVoid, ""]],
}
cmd_list.update(PoolDeviceClass.cmd_list)
# Attribute definitions
attr_list = {
'ElementList': [[DevString, SPECTRUM, READ, 4096]],
'LogLevel': [[DevLong, SCALAR, READ_WRITE],
{'Memorized': "true",
'label': "Log level",
'Display level': DispLevel.EXPERT}],
}
attr_list.update(PoolDeviceClass.attr_list)
def _get_class_properties(self):
ret = PoolDeviceClass._get_class_properties(self)
ret['Description'] = "Controller device class"
ret['InheritedFrom'].insert(0, 'PoolDevice')
return ret