class IfkAmqpAgent(object):
""" Interface to AMQP
Publishes the Ifk 'io' messages
on AMQP fabric through the "org.phidgets" exchange
"""
EXCH="org.phidgets"
LCONFIG = {"%conn-open": 0
,"%conn-error" : 4*60
,"%json-encode": 4*60*60
}
def __init__(self):
self.config=None
self.comm=None
Bus.publish(self, "%llconfig", self.LCONFIG)
def _hconfig(self, config):
self.config=config
def Error(self, dic):
"""Generated when an error on a device is detected"""
if self.comm:
self.comm.publish("device.error", dic)
def Din(self, dic):
"""Generated when the state of a digital input changes"""
if self.comm:
self.comm.publish("device.io.din", dic)
def Dout(self, dic):
"""Generated when the state of a digital output changes"""
if self.comm:
self.comm.publish("device.io.dout", dic)
def Ain(self, dic):
"""Generated when the state of an analog input changes"""
if self.comm:
self.comm.publish("device.io.ain", dic)
def _hpoll(self, pc):
if self.config is None:
Bus.publish(self, "%config-amqp?")
if self.comm is not None:
if not self.comm.isOk():
del self.comm
self.comm=None
if self.comm is None:
self.comm=AMQPCommTx(self.config, self.EXCH)
self.comm.connect()
class SensorsHandlerAgent(object):
EXCH="org.sensors"
def __init__(self):
self.config=None
self.comm=None
def _hConfig(self, config):
self.config=config
def _hPoll(self, pc):
if not self.config:
Bus.publish(self, "%config-amqp?")
if not self.comm:
self.comm=AMQPCommTx(self.config, self.EXCH)
self.comm.connect()
if not self.comm.isOk():
del self.comm
self.comm=None
def StateChanged(self, sensor_type, dic):
"""Generated when a sensor changes state"""
if self.comm:
self.comm.publish("state.io.%s" % sensor_type, dic)
def ConfigSensors(self, config):
"""Generated when sensor configuration changess and
also periodically
"""
if self.comm:
self.comm.publish("config", config)
def _hPoll(self, pc):
if not self.config:
Bus.publish(self, "%config-amqp?")
if not self.comm:
self.comm=AMQPCommTx(self.config, self.EXCH)
self.comm.connect()
if not self.comm.isOk():
del self.comm
self.comm=None
def _hpoll(self, pc):
if self.config is None:
Bus.publish(self, "%config-amqp?")
if self.comm is not None:
if not self.comm.isOk():
del self.comm
self.comm=None
if self.comm is None:
self.comm=AMQPCommTx(self.config, self.EXCH)
self.comm.connect()