def subscribe(self, form, callback):
"""
Tango event subscription.
The 'form' argument is an instance of TangoEventSubscriptionForm
Throws in case of error
"""
dev_proxy = DeviceProxy(form.dev)
fq_attr_name = event_source_str("{}/{}".format(dev_proxy.dev_name(),
form.attr))
if (fq_attr_name, form.evt_type) in self._subscriptions:
try:
self.unsubscribe(fq_attr_name, form.evt_type)
except Exception as e:
self.logger.error(e)
raise
tango_evt = TangoEventInfo(
attr=form.attr,
dev_proxy=dev_proxy,
evt_type=form.evt_type,
message_id=form.message_id,
user_data=form.user_data,
)
pre_subscription_action(form, dev_proxy)
self._subscriptions[(fq_attr_name, form.evt_type)] = tango_evt
try:
tango_evt.subscribe(callback)
except:
del self._subscriptions[(fq_attr_name, form.evt_type)]
raise
def get_device_commands(self, with_context=True):
""" Get device proxy commands"""
### TBD - Why use DeviceProxy?
### Can this not be known through self which is a Device
commands = []
device_proxy = DeviceProxy(self.get_name())
cmd_config_list = device_proxy.command_list_query()
for device_cmd_config in cmd_config_list:
commands.append(get_dp_command(
device_proxy.dev_name(), device_cmd_config, with_context))
return commands
