def virtual_app():
path = os.path.join(os.path.dirname(__file__), 'virtual_app_device.py')
hw = HardwareManager(port="virtual:%s" % path)
hw.connect(1)
yield hw
hw.disconnect()
class HardwareManagerResource(SharedResource):
"""A shared HardwareManager instance.
Arguments:
port (str): Optional port argument that should
be used to connect to a DeviceAdapter. If not
specified, the virtual environment default is used.
connect: (str or int): The UUID of a device to connect to
when this resource is created and disconnect from when
it is destroyed. This is an optional parameter. If
it is not specified the HardwareManager is not connected
upon creation.
connect_direct: (str or int): The connection string of a device to connect
directly to when this resource is created and disconnect from
when it is destroyed. This is an optional parameter. If
it is not specified the HardwareManager is not connected
upon creation.
"""
ARG_SCHEMA = RESOURCE_ARG_SCHEMA
def __init__(self, args):
super(HardwareManagerResource, self).__init__()
self._port = args.get('port')
self._connect_id = args.get('connect')
self._connection_string = args.get('connect_direct')
self.hwman = None
if self._connect_id is not None and not isinstance(
self._connect_id, int):
self._connect_id = int(self._connect_id, 0)
def open(self):
"""Open and potentially connect to a device."""
self.hwman = HardwareManager(port=self._port)
self.opened = True
if self._connection_string is not None:
try:
self.hwman.connect_direct(self._connection_string)
except HardwareError:
self.hwman.close()
raise
elif self._connect_id is not None:
try:
self.hwman.connect(self._connect_id)
except HardwareError:
self.hwman.close()
raise
def close(self):
"""Close and potentially disconnect from a device."""
if self.hwman.stream.connected:
self.hwman.disconnect()
self.hwman.close()
self.opened = False