TANGO device interface change event bug test files

event_test.py

import time
from tango import DeviceProxy, EventType

dp = DeviceProxy('tango://<host-name>:<port>/test/nodb/device1#dbase=no')
dp.ping()


def printx(data):
    for att in data.att_list:
        if att.name == 'ScalarDevEnum':
            print "ScalarDevEnum enum-labels: ", att.enum_labels

print "*** Subscribing to an interface change event."
_id = dp.subscribe_event(EventType.INTERFACE_CHANGE_EVENT, printx)


print "Initial attribute list: ", dp.get_attribute_list()
# Trigger an interface change event by adding an attribute called current.
print "*** Adding a new attribute called 'current'."
dp.add_dyn_attr('current')
# Sleep a bit to wait for the interface change event.
time.sleep(2)
print "Final attribute list: ", dp.get_attribute_list()

tango.db

TangoTestDevice/test/DEVICE/TangoTestDevice: "test/nodb/device1"

#############################################
# CLASS TangoTestDevice


# CLASS TangoTestDevice attribute properties



# DEVICE test/nodb/device1 properties 

test/nodb/device1->polled_attr: scalardevenum,\
                               1000

# DEVICE test/nodb/device1 attribute properties

TangoTestDevice.py

from tango.server import Device, DeviceMeta, attribute, command, server_run


class TangoTestDevice(Device):
    __metaclass__ = DeviceMeta
    def init_device(self):
        super(TangoTestDevice, self).init_device()
        self._devenum = 0
        self._current = 0.0

    def read_current(self):
        print ("read current method ", self._current)
        return self._current

    def write_current(self, curr):
        self._current = curr
        print ("set current to ", self._current)

    @attribute(dtype='DevEnum', doc='An example scalar Enum attribute',
               enum_labels=['ONLINE', 'OFFLINE', 'RESERVE'],
               polling_period=1000, event_period=25)
    def ScalarDevEnum(self):
        return self._devenum

    @command(dtype_in=str, doc_in='name of dynamic attribute to add')
    def add_dyn_attr(self, name):
        attr = attribute(name=name, dtype='float',
                         fget=self.read_current, fset=self.write_current)
        self.add_attribute(attr)

if __name__ == "__main__":
    server_run([TangoTestDevice])