class HubManager(object):
def __init__(self, protocol=IoTHubTransportProvider.MQTT):
self.client_protocol = protocol
self.client = IoTHubModuleClient()
self.client.create_from_environment(protocol)
# set the time until a message times out
self.client.set_option("messageTimeout", MESSAGE_TIMEOUT)
self.set_certificates()
# sets the callback when a twin's desired properties are updated.
self.client.set_module_twin_callback(module_twin_callback, self)
# Set the certifications,Steven Lian,2018
def set_certificates(self):
isWindows = sys.platform.lower() in ['windows', 'win32']
if not isWindows:
CERT_FILE = os.environ['EdgeModuleCACertificateFile']
print("Adding TrustedCerts from: {0}".format(CERT_FILE))
# this brings in x509 privateKey and certificate
file = open(CERT_FILE)
try:
self.client.set_option("TrustedCerts", file.read())
print("set_option TrustedCerts successful")
except IoTHubClientError as iothub_client_error:
print("set_option TrustedCerts failed (%s)" %
iothub_client_error)
file.close()
# Forwards the message received onto the next stage in the process.
def forward_event_to_output(self, outputQueueName, event, send_context):
self.client.send_event_async(outputQueueName, event,
send_confirmation_callback, send_context)
class HubManager(object):
def __init__(self, protocol=IoTHubTransportProvider.MQTT):
self.client_protocol = protocol
self.client = IoTHubModuleClient()
self.client.create_from_environment(protocol)
# set the time until a message times out
self.client.set_option("messageTimeout", MESSAGE_TIMEOUT)
# register for TWIN updates
self.client.set_module_twin_callback(module_twin_callback, self)
def updateReportedTWIN(self):
reported_state = {}
reported_state["POLLINGfrequency"] = POLLINGfrequency
reported_state["POLLINGHost"] = POLLINGHost
reported_statestr = json.dumps(reported_state)
self.client.send_reported_state(reported_statestr,
len(reported_statestr),
send_reported_state_callback, self)
# Forwards the message received onto the next stage in the process.
def forward_event_to_output(self, outputQueueName, event, send_context):
self.client.send_event_async(outputQueueName, event,
send_confirmation_callback, send_context)
class HubManager(object):
def __init__(self, messageTimeout, protocol, verbose):
'''
Communicate with the Edge Hub
:param int messageTimeout: the maximum time in milliseconds until a message times out. The timeout period starts at IoTHubClient.send_event_async. By default, messages do not expire.
:param IoTHubTransportProvider protocol: Choose HTTP, AMQP or MQTT as transport protocol. Currently only MQTT is supported.
:param bool verbose: set to true to get detailed logs on messages
'''
self.TWIN_CONTEXT = 0
self.messageTimeout = messageTimeout
self.client_protocol = protocol
self.client = IoTHubModuleClient()
self.client.create_from_environment(protocol)
self.client.set_option("messageTimeout", self.messageTimeout)
self.client.set_option("product_info", "edge-camera-capture")
self.client.set_module_twin_callback(module_twin_callback, 0)
if verbose:
self.client.set_option("logtrace", 1) # enables MQTT logging
def send_event_to_output(self, outputQueueName, event, send_context):
self.client.send_event_async(outputQueueName, event,
send_confirmation_callback, send_context)
def send_reported_property_update(self, propertyName, propertyValue,
send_context):
reported_state = "{\"" + propertyName + "\":\"" + propertyValue + "\"}"
self.client.send_reported_state(reported_state, len(reported_state),
send_reported_state_callback,
send_context)
print("Reported property updated: " + str(reported_state))
class IotHubManager(object):
def __init__(self, protocol=IOT_HUB_PROTOCOL):
print("Creating IoT Hub manager")
self.client_protocol = protocol
self.client = IoTHubModuleClient()
self.client.create_from_environment(protocol)
# set the time until a message times out
self.client.set_option("messageTimeout", MESSAGE_TIMEOUT)
def subscribe_to_events(self):
print("Subscribing to method calls")
self.client.set_module_method_callback(method_callback, 0)
print("Subscribing to module twin updates")
self.client.set_module_twin_callback(module_twin_callback,
MODULE_TWIN_UPDATE_CONTEXT)
# sends a messager to the "ToUpstream" queue to be sent to hub
def send_message_to_upstream(self, message):
try:
message = IoTHubMessage(message)
self.client.send_event_async(TO_UPSTREAM_MESSAGE_QUEUE_NAME,
message, send_confirmation_callback,
0)
# logging.info("finished sending message...")
except Exception as ex:
print("Exception in send_message_to_upstream: %s" % ex)
pass
class HubManager(object):
def __init__(self, protocol=IoTHubTransportProvider.MQTT):
self.client_protocol = protocol
self.client = IoTHubModuleClient()
self.client.create_from_environment(protocol)
# set the time until a message times out
self.client.set_option("messageTimeout", MESSAGE_TIMEOUT)
# sets the callback when a message arrives on "input1" queue. Messages sent to
# other inputs or to the default will be silently discarded.
self.client.set_message_callback("input1", receive_message_callback,
self)
# Sets the callback when a module twin's desired properties are updated.
self.client.set_module_twin_callback(module_twin_callback, self)
# Sets callback for module twin reported properties.
global reported_state
#self.client.send_reported_state(self.client, reported_state, len(reported_state), send_reported_state_callback, SEND_REPORTED_STATE_CONTEXT)
# Forwards the message received onto the next stage in the process.
def forward_event_to_output(self, outputQueueName, event, send_context):
self.client.send_event_async(outputQueueName, event,
send_confirmation_callback, send_context)
class HubManager(object):
def __init__(self):
global TWIN_CONTEXT, application_name
# Defines settings of the IoT SDK
protocol = IoTHubTransportProvider.MQTT
self.client_protocol = protocol
self.client = IoTHubModuleClient()
self.client.create_from_environment(protocol)
self.client.set_option("logtrace", 1) #enables MQTT logging
self.client.set_option("messageTimeout", 10000)
# sets the callback when a message arrives on "input1" queue. Messages sent to
# other inputs or to the default will be silently discarded.
self.client.set_message_callback("input1", receive_message_callback,
self)
print("Module is now waiting for messages in the input1 queue.")
self.client.set_module_twin_callback(module_twin_callback,
TWIN_CONTEXT)
print("Module is now waiting for device twin updating.")
if application_name is not None:
reported = {'application': application_name}
self.client.patch_twin_reported_properties(reported)
def send_event_to_output(self, outputQueueName, event, send_context):
self.client.send_event_async(outputQueueName, event,
send_confirmation_callback, send_context)
def iothub_client_init(self):
protocol = IoTHubTransportProvider.MQTT
client = IoTHubModuleClient()
client.create_from_environment(protocol)
if client.protocol == IoTHubTransportProvider.MQTT or client.protocol == IoTHubTransportProvider.MQTT_WS:
client.set_module_twin_callback(device_twin_callback,
self.TWIN_CONTEXT)
return client
class HubManager(object):
def __init__(self, protocol=IoTHubTransportProvider.MQTT):
self.client_protocol = protocol
self.client = IoTHubModuleClient()
self.client.create_from_environment(protocol)
# set the time until a message times out
self.client.set_option("messageTimeout", MESSAGE_TIMEOUT)
self.client.set_module_twin_callback(module_twin_callback, self)
self.client.set_module_method_callback(method_callback, 0)
class HubManager(object):
def __init__(self, protocol=IoTHubTransportProvider.MQTT):
self.client_protocol = protocol
self.client = IoTHubModuleClient()
self.client.create_from_environment(protocol)
# set the time until a message times out
self.client.set_option("messageTimeout", MESSAGE_TIMEOUT)
self.client.set_module_twin_callback(module_twin_callback, self)
# Forwards the message received onto the next stage in the process.
def forward_event_to_output(self, outputQueueName, event, send_context):
print("inside forward event function")
self.client.send_event_async(outputQueueName, event,
send_confirmation_callback, send_context)
class HubManager(object):
def __init__(self, messageTimeout, protocol, verbose, videoCapture):
# Communicate with the Edge Hub
self.messageTimeout = messageTimeout
self.client_protocol = protocol
self.client = IoTHubModuleClient()
self.client.create_from_environment(protocol)
self.client.set_option("messageTimeout", self.messageTimeout)
self.client.set_option("product_info", "iotedge-jetson-nano-yolov3")
self.videoCapture = videoCapture
if verbose:
self.client.set_option("logtrace", 1) #enables MQTT logging
self.client.set_module_twin_callback(module_twin_callback, self)
def send_reported_state(self, reported_state, size, user_context):
self.client.send_reported_state(reported_state, size,
send_reported_state_callback,
user_context)
def send_event_to_output(self, outputQueueName, event, send_context):
self.client.send_event_async(outputQueueName, event,
send_confirmation_callback, send_context)
def module_twin_send_reported(self):
jsonTemplate = "{\"ConfidenceLevel\": \"%s\",\"VerboseMode\": %d,\"Inference\": %d, \"VideoSource\":\"%s\"}"
videoCapture = hubManager.videoCapture
strUrl = videoCapture.videoPath
jsonData = jsonTemplate % (str(
videoCapture.confidenceLevel), videoCapture.verbose,
videoCapture.runInference, strUrl)
logging.info('device_twin_send_reported()')
logging.info(' - payload : {}'.format(json.dumps(jsonData,
indent=4)))
hubManager.send_reported_state(jsonData, len(jsonData), 1002)
class HubManager(object):
def __init__(self, protocol=IoTHubTransportProvider.MQTT):
self.client_protocol = protocol
self.client = IoTHubModuleClient()
self.client.create_from_environment(protocol)
# set the time until a message times out
self.client.set_option("messageTimeout", MESSAGE_TIMEOUT)
# Sets the callback when a module twin's desired properties are updated.
self.client.set_module_twin_callback(module_twin_callback, self)
# sets the callback when a message arrives on "ScheduleOutput" queue.
self.client.set_message_callback("ScheduleInput",
receive_schedule_message_callback,
self)
# sets the callback when a message arrives on "SensorsOutputInput" queue.
#self.client.set_message_callback("SensorsInput", receive_sensor_notification_callback, self)
print("Initialization done.\n")
class HubManager(object):
def __init__(self, protocol=IoTHubTransportProvider.MQTT):
self.client_protocol = protocol
self.client = IoTHubModuleClient()
self.client.create_from_environment(protocol)
# set the time until a message times out
self.client.set_option("messageTimeout", MESSAGE_TIMEOUT)
self.client.set_module_twin_callback(module_twin_callback, self)
# sets the callback when a message arrives on "input1" queue. Messages sent to
# other inputs or to the default will be silently discarded.
self.client.set_message_callback("input1", receive_message_callback,
self)
# Forwards the message received onto the next stage in the process.
def forward_event_to_output(self, outputQueueName, event, send_context):
print("inside forward event function")
adjust_outstanding_sent_message_count(1)
self.client.send_event_async(outputQueueName, event,
send_confirmation_callback, send_context)
class HubManager(object):
def __init__(self, protocol=IoTHubTransportProvider.MQTT):
self.client_protocol = protocol
self.client = IoTHubModuleClient()
self.client.create_from_environment(protocol)
# set the time until a message times out
self.client.set_option("messageTimeout", MESSAGE_TIMEOUT)
# sets the callback when a message arrives on "input1" queue. Messages sent to
# other inputs or to the default will be silently discarded.
self.client.set_message_callback("input1", receive_message_callback,
self)
# items added to show the complete functionality
self.client.set_module_twin_callback(module_twin_callback, self)
self.client.set_module_method_callback(module_method_callback, self)
# updating the Module TWIN with a started time
reported_state = "{\"started\":\"" + str(
datetime.datetime.now()) + "\"}"
self.client.send_reported_state(reported_state, len(reported_state),
send_reported_state_callback, self)
def updateReportedTWIN(self):
reported_state = {}
reported_state["RESTTargetURL"] = RESTTargetURL
reported_state["RESTTargetLocation"] = RESTTargetLocation
reported_state["POLINGInterval"] = POLINGInterval
reported_statestr = json.dumps(reported_state)
self.client.send_reported_state(reported_statestr,
len(reported_statestr),
send_reported_state_callback, self)
# Forwards the message received onto the next stage in the process.
def forward_event_to_output(self, outputQueueName, event, send_context):
self.client.send_event_async(outputQueueName, event,
send_confirmation_callback, send_context)
class HubManager(object):
def __init__(self, protocol=IoTHubTransportProvider.MQTT):
# init Instance Attributes
self.MESSAGE_DELAY = 0
# init IoTHubModuleClient
self.client_protocol = protocol
self.client = IoTHubModuleClient()
self.client.create_from_environment(protocol)
# set the time until a message times out
self.client.set_option("messageTimeout", MESSAGE_TIMEOUT)
self.client.set_module_twin_callback(module_twin_callback, self)
# send a message to the next stage in the process.
def send_async(self, outputQueueName, event, send_context):
self.client.send_event_async(outputQueueName, event,
send_confirmation_callback, send_context)
#update modules twin reported properties
def send_reported_state(self, reported_state, size, user_context):
self.client.send_reported_state(reported_state, size,
send_reported_state_callback,
user_context)
class HubManager(object):
def __init__(self, messageTimeout, protocol, verbose):
# Communicate with the Edge Hub
self.messageTimeout = messageTimeout
self.client_protocol = protocol
self.client = IoTHubModuleClient()
self.client.create_from_environment(protocol)
self.client.set_option("messageTimeout", self.messageTimeout)
self.client.set_option("product_info", "edge-yolo-capture")
if verbose:
self.client.set_option("logtrace", 1) #enables MQTT logging
self.client.set_module_twin_callback(device_twin_callback, None)
def send_reported_state(self, reported_state, size, user_context):
self.client.send_reported_state(reported_state, size,
send_reported_state_callback,
user_context)
def send_event_to_output(self, outputQueueName, event, send_context):
self.client.send_event_async(outputQueueName, event,
send_confirmation_callback, send_context)
def run_e2e_device_client(iothub_service_client_messaging,
iothub_device_method, iothub_device_twin, device_id,
device_or_module_connection_string, protocol,
authMethod, testing_modules):
global IOTHUB_E2E_X509_CERT
global IOTHUB_E2E_X509_THUMBPRINT
global IOTHUB_E2E_X509_PRIVATE_KEY
global CERTIFICATES
global MESSAGING_CONTEXT
###########################################################################
# IoTHubClient
# prepare
# act
if testing_modules == True:
device_client = IoTHubModuleClient(device_or_module_connection_string,
protocol)
assert isinstance(device_client,
IoTHubModuleClient), 'Error: Invalid type returned!'
else:
device_client = IoTHubDeviceClient(device_or_module_connection_string,
protocol)
assert isinstance(device_client,
IoTHubDeviceClient), 'Error: Invalid type returned!'
# verify
assert device_client != None, "Error: device_client is NULL"
###########################################################################
###########################################################################
# set_option
# prepare
# act
device_client.set_option("messageTimeout", DEVICE_MESSAGE_TIMEOUT)
if authMethod == IoTHubRegistryManagerAuthMethod.X509_THUMBPRINT:
device_client.set_option("x509certificate", IOTHUB_E2E_X509_CERT)
device_client.set_option("x509privatekey", IOTHUB_E2E_X509_PRIVATE_KEY)
if device_client.protocol == IoTHubTransportProvider.HTTP:
device_client.set_option("timeout", HTTP_TIMEOUT)
device_client.set_option("MinimumPollingTime",
HTTP_MINIMUM_POLLING_TIME)
device_client.set_option("TrustedCerts", CERTIFICATES)
device_client.set_option("logtrace", True)
# verify
###########################################################################
if testing_modules == False: ## Modules do not currently support set_message_callback outside context of Edge inputs/outputs
###########################################################################
# set_message_callback
# prepare
# act
device_client.set_message_callback(receive_message_callback,
MESSAGING_CONTEXT)
###########################################################################
###########################################################################
# set_connection_status_callback
# prepare
# act
device_client.set_connection_status_callback(connection_status_callback,
CONNECTION_STATUS_CONTEXT)
###########################################################################
# verify
###########################################################################
if protocol == IoTHubTransportProvider.AMQP \
or protocol == IoTHubTransportProvider.AMQP_WS \
or protocol == IoTHubTransportProvider.MQTT \
or protocol == IoTHubTransportProvider.MQTT_WS:
###########################################################################
# set_device_twin_callback
# prepare
# act
if testing_modules == True:
device_client.set_module_twin_callback(device_twin_callback,
MESSAGING_CONTEXT)
else:
device_client.set_device_twin_callback(device_twin_callback,
MESSAGING_CONTEXT)
# verify
###########################################################################
###########################################################################
# set_device_method_callback
# prepare
# act
if testing_modules == True:
device_client.set_module_method_callback(device_method_callback,
MESSAGING_CONTEXT)
else:
device_client.set_device_method_callback(device_method_callback,
MESSAGING_CONTEXT)
# verify
###########################################################################
###########################################################################
# update device twin
# prepare
global TWIN_CALLBACK_EVENT
global TWIN_CALLBACK_COUNTER
TWIN_CALLBACK_EVENT.clear()
TWIN_CALLBACK_COUNTER = 0
# act
sc_update_twin(iothub_device_twin, device_id, testing_modules)
TWIN_CALLBACK_EVENT.wait(CALLBACK_TIMEOUT)
# verify
assert TWIN_CALLBACK_COUNTER > 0, "Error: device_twin_callback callback has not been called"
###########################################################################
###########################################################################
# call device method
# prepare
global DEVICE_METHOD_EVENT
global DEVICE_METHOD_CALLBACK_COUNTER
DEVICE_METHOD_EVENT.clear()
DEVICE_METHOD_CALLBACK_COUNTER = 0
method_name = "E2EMethodName"
payload_json = "{\"method_number\":\"42\"}"
# act
sc_invoke_device_method(iothub_device_method, device_id, method_name,
payload_json, testing_modules)
DEVICE_METHOD_EVENT.wait(CALLBACK_TIMEOUT)
# verify
assert DEVICE_METHOD_CALLBACK_COUNTER > 0, "Error: device_twin_callback callback has not been called"
###########################################################################
###########################################################################
# send_reported_state
# prepare
global REPORTED_STATE_EVENT
global REPORTED_STATE_CALLBACK_COUNTER
reported_state = "{\"newState\":\"standBy\"}"
REPORTED_STATE_EVENT.clear()
REPORTED_STATE_CALLBACK_COUNTER = 0
# act
device_client.send_reported_state(reported_state, len(reported_state),
send_reported_state_callback,
REPORTED_STATE_CONTEXT)
REPORTED_STATE_EVENT.wait(CALLBACK_TIMEOUT)
# verify
assert REPORTED_STATE_CALLBACK_COUNTER > 0, "Error: send_reported_state_callback has not been called"
###########################################################################
###########################################################################
# set_retry_policy
# get_retry_policy
# prepare
# act
retryPolicy = IoTHubClientRetryPolicy.RETRY_INTERVAL
retryInterval = 100
device_client.set_retry_policy(retryPolicy, retryInterval)
print("SetRetryPolicy to: retryPolicy = %d" % retryPolicy)
print("SetRetryPolicy to: retryTimeoutLimitInSeconds = %d" % retryInterval)
# verify
retryPolicyReturn = device_client.get_retry_policy()
assert retryPolicyReturn.retryPolicy == IoTHubClientRetryPolicy.RETRY_INTERVAL, "Error: set_retry_policy/get_retry_policy failed"
assert retryPolicyReturn.retryTimeoutLimitInSeconds == 100, "Error: set_retry_policy/get_retry_policy failed"
print("GetRetryPolicy returned: retryPolicy = %d" %
retryPolicyReturn.retryPolicy)
print("GetRetryPolicy returned: retryTimeoutLimitInSeconds = %d" %
retryPolicyReturn.retryTimeoutLimitInSeconds)
if testing_modules == False: ## Modules do not currently support set_message_callback outside context of Edge inputs/outputs
###########################################################################
# send_event_async
# prepare
global MESSAGING_MESSAGE
global MESSAGE_RECEIVE_EVENT
global MESSAGE_RECEIVE_CALLBACK_COUNTER
MESSAGING_MESSAGE = ''.join(
[random.choice(string.ascii_letters) for n in range(12)])
message = IoTHubMessage(bytearray(MESSAGING_MESSAGE, 'utf8'))
MESSAGE_RECEIVE_EVENT.clear()
MESSAGE_RECEIVE_CALLBACK_COUNTER = 0
# act
sc_send_message(iothub_service_client_messaging, device_id, message,
testing_modules)
MESSAGE_RECEIVE_EVENT.wait(CALLBACK_TIMEOUT)
# verify
assert MESSAGE_RECEIVE_CALLBACK_COUNTER > 0, "Error: message has not been received"
###########################################################################
###########################################################################
# get_send_status
# prepare
status_counter = 0
status = -1
# act
while status_counter < 1:
status = device_client.get_send_status()
print("Send status: {0}".format(status))
# verify
assert status == 0, "get_send_status reported status is not IDLE"
status_counter += 1
###########################################################################
if protocol != IoTHubTransportProvider.AMQP \
and protocol != IoTHubTransportProvider.AMQP_WS:
###########################################################################
# get_last_message_receive_time
# prepare
last_receive_time = -1
# act
last_receive_time = device_client.get_last_message_receive_time()
# verify
assert last_receive_time > 0, "Error: get_last_message_receive_time failed"
###########################################################################
if testing_modules == False: ## Modules do not currently support uploadToBlob
###########################################################################
# upload_blob_async
# prepare
global BLOB_UPLOAD_CONTEXT
global BLOB_UPLOAD_EVENT
global BLOB_UPLOAD_CALLBACK_COUNTER
destination_file_name = ''.join(
[random.choice(string.ascii_letters) for n in range(12)])
source = "Blob content for file upload test!"
size = 34
BLOB_UPLOAD_EVENT.clear()
BLOB_UPLOAD_CALLBACK_COUNTER = 0
# act
device_client.upload_blob_async(destination_file_name, source, size,
blob_upload_conf_callback,
BLOB_UPLOAD_CONTEXT)
BLOB_UPLOAD_EVENT.wait(CALLBACK_TIMEOUT)
# verify
assert BLOB_UPLOAD_CALLBACK_COUNTER > 0, "Error: blob_upload_conf_callback callback has not been called"
class IotHubManager(object):
def __init__(self, protocol, camera_client: CameraClient, properties: Properties):
print("Creating IoT Hub manager")
self.client_protocol = protocol
self.client = IoTHubModuleClient()
self.client.create_from_environment(protocol)
self.camera_client = camera_client
self.properties = properties
# set the time until a message times out
self.client.set_option("messageTimeout", MESSAGE_TIMEOUT)
def subscribe_to_events(self):
print("Subscribing to method calls")
self.client.set_module_method_callback(self.__method_callback_handler, 0)
print("Subscribing to module twin updates")
self.client.set_module_twin_callback(
self.__module_twin_callback, MODULE_TWIN_UPDATE_CONTEXT)
# sends a messager to the "ToUpstream" queue to be sent to hub
def send_message_to_upstream(self, message):
try:
message = IoTHubMessage(message)
self.client.send_event_async(
TO_UPSTREAM_MESSAGE_QUEUE_NAME,
message,
self.__send_confirmation_callback,
0)
# logging.info("finished sending message...")
except Exception as ex:
print("Exception in send_message_to_upstream: %s" % ex)
pass
# Callback received when the message that we're forwarding is processed.
def __send_confirmation_callback(self, message, result, user_context):
global send_callbacks
print("Confirmation[%d] received for message with result = %s" % (
user_context, result))
map_properties = message.properties()
key_value_pair = map_properties.get_internals()
print("\tProperties: %s" % key_value_pair)
send_callbacks += 1
print("\tTotal calls confirmed: %d" % send_callbacks)
def __method_callback_handler(self, method_name, payload, user_context):
"""
Private method to handle the callbacks from the IoT Hub by calling the
callback matching `method_name`
"""
retval = {
TURN_CAMERA_ON_METHOD_NAME:
lambda payload, user_context: self.__turn_camera_on_callback(
payload, user_context),
TURN_CAMERA_OFF_METHOD_NAME:
lambda payload, user_context: self.__turn_camera_off_callback(
payload, user_context)
}[method_name](payload, user_context)
return retval
def __turn_camera_on_callback(self, payload, user_context):
retval = DeviceMethodReturnValue()
try:
self.camera_client.set_preview_state(SETTING_ON)
# TODO: restart analytics
retval.status = 200
retval.response = "{\"Response\":\"Successfully started camera\"}"
return retval
except Exception:
retval.status = 500
retval.response = "{\"Response\":\"Failed to start camera\"}"
return retval
def __turn_camera_off_callback(self, payload, user_context):
retval = DeviceMethodReturnValue()
try:
self.camera_client.set_overlay_state(SETTING_OFF)
self.camera_client.set_analytics_state(SETTING_OFF)
self.camera_client.set_preview_state(SETTING_OFF)
retval.status = 200
retval.response = "{\"Response\":\"Successfully stopped camera\"}"
return retval
except Exception:
retval.status = 500
retval.response = "{\"Response\":\"Failed to stop camera\"}"
return retval
def __module_twin_callback(self, update_state, payload, user_context):
print("Received twin callback")
self.properties.handle_twin_update(payload)
self.__update_model_and_config()
def __update_model_and_config(self):
model_props = self.properties.model_properties
camera_props = self.properties.camera_properties
if not self.camera_client:
print("Handle updates aborting")
print("\tcamera_client is %s" % self.camera_client)
return
try:
is_model_changed = model_props.update_inference_model()
camera_props.configure_camera_client(self.camera_client, is_model_changed)
self.properties.report_properties_to_hub(self)
except Exception as ex:
log_unknown_exception(
"Error raised while handling update callback: %s" % ex,
self)
raise ex
class IotHubManager(object):
TIMER_COUNT = 2
def __init__(self, protocol):
print("Creating IoT Hub manager")
self.client_protocol = protocol
self.client = IoTHubModuleClient()
self.client.create_from_environment(protocol)
# set the time until a message times out
self.client.set_option("messageTimeout", MESSAGE_TIMEOUT)
self.client.set_module_twin_callback(self.module_twin_callback, self)
self.setRestartCamera = False
cam_type = "video_file"
cam_source = "/sample_video/video.mp4"
self.model_dst_folder = "./default_model"
self.model_url = None
self.ret_flag = None
def send_message_to_output(self,
message,
output_name,
last_sent_time=time.time()):
try:
#delaying message send to IotHub as we have 400+ msg per sec if we send all up we will exhaust IotHub limit
#if(time.time() - last_sent_time <= (60/msg_per_minute)):
# return last_sent_time
message = IoTHubMessage(message)
self.client.send_event_async(output_name, message,
self.__send_confirmation_callback, 0)
print('message sent')
last_sent_time = time.time()
return last_sent_time
# logging.info("finished sending message...")
except Exception as ex:
print("Exception in send_message_to_output: %s" % ex)
pass
# sends a messager to the "ToUpstream" queue to be sent to hub
def send_message_to_upstream(self, message, last_sent_time=time.time()):
try:
#delaying message send to IotHub as we have 400+ msg per sec if we send all up we will exhaust IotHub limit
if (time.time() - last_sent_time <= (60 / msg_per_minute)):
return last_sent_time
message = IoTHubMessage(message)
self.client.send_event_async(TO_UPSTREAM_MESSAGE_QUEUE_NAME,
message,
self.__send_confirmation_callback, 0)
last_sent_time = time.time()
return last_sent_time
# logging.info("finished sending message...")
except Exception as ex:
print("Exception in send_message_to_upstream: %s" % ex)
pass
# Callback received when the message that we're forwarding is processed.
def __send_confirmation_callback(self, message, result, user_context):
global send_callbacks
print("Confirmation[%d] received for message with result = %s" %
(user_context, result))
map_properties = message.properties()
key_value_pair = map_properties.get_internals()
print("\tProperties: %s" % key_value_pair)
send_callbacks += 1
print("\tTotal calls confirmed: %d" % send_callbacks)
def send_reported_state_callback(self, status_code, user_context):
print("")
print("Confirmation for reported state called with:")
print(" status_code: %d" % status_code)
def send_property(self, prop):
try:
if self.client.protocol == IoTHubTransportProvider.MQTT:
self.client.send_reported_state(
prop, len(prop), self.send_reported_state_callback, prop)
except Exception as ex:
print("Exception in send_property: %s" % ex)
def module_twin_callback(self, update_state, payload, user_context):
global inference_files_zip_url
global msg_per_minute
global object_of_interest
print("")
print("Twin callback called with:")
print(" updateStatus: %s" % update_state)
print(" payload: %s" % payload)
data = json.loads(payload)
self.setRestartCamera = False
if "desired" in data and "inference_files_zip_url" in data["desired"]:
self.model_dst_folder = "default_model"
inference_files_zip_url = data["desired"][
"inference_files_zip_url"]
if inference_files_zip_url:
print(
"\n Setting value to %s from :: data[\"desired\"][\"all_inference_files_zip\"]"
% inference_files_zip_url)
self.setRestartCamera = get_file_zip(inference_files_zip_url,
self.model_dst_folder)
self.model_url = inference_files_zip_url
else:
print(inference_files_zip_url)
self.model_url = None
if "inference_files_zip_url" in data:
self.model_dst_folder = "default_model"
inference_files_zip_url = data["inference_files_zip_url"]
if inference_files_zip_url:
print(
"\n Setting value to %s from :: data[\"all_inference_files_zip\"]"
% inference_files_zip_url)
self.ret_flag = get_file_zip(inference_files_zip_url,
self.model_dst_folder)
#self.setRestartCamera = True
self.model_url = inference_files_zip_url
else:
print(inference_files_zip_url)
self.model_url = None
if "desired" in data and "cam_type" in data["desired"]:
cam_type = data["desired"]["cam_type"]
self.cam_type = str(cam_type)
print("Setting value to %s from :: data[desired][cam_type]" %
cam_type)
self.ret_flag = True
elif "cam_type" in data:
cam_type = data["cam_type"]
self.cam_type = str(cam_type)
print("Setting value to %s from :: data[cam_type]" % cam_type)
self.ret_flag = True
if "desired" in data and "cam_source" in data["desired"]:
cam_source = data["desired"]["cam_source"]
self.cam_source = str(cam_source)
print("Setting value to %s from :: data[desired][cam_source]" %
cam_source)
self.ret_flag = True
elif "cam_source" in data:
cam_source = data["cam_source"]
self.cam_source = str(cam_source)
print("Setting value to %s from :: data[cam_source]" % cam_source)
self.ret_flag = True
if self.cam_source:
if self.cam_type == "video_file":
print("self.cam_source %s file" % self.cam_source)
dst_folder = "sample_video"
print(
"\n Download and unzip video file to sample dir from %s" %
self.cam_source)
self.ret_flag = get_file_zip(self.cam_source, dst_folder)
#ToDo readfilename and add to dst_folder
self.cam_source = "/sample_video/video.mp4"
#self.setRestartCamera = True
else:
print(self.cam_source)
if "desired" in data and "object_of_interest" in data["desired"]:
object_of_interest = data["desired"]["object_of_interest"]
print("Setting value to %s from :: data[\"object_of_interest\"]" %
object_of_interest)
if "object_of_interest" in data:
object_of_interest = data["object_of_interest"]
print("Setting value to %s from :: data[\"object_of_interest\"]" %
object_of_interest)
if "desired" in data and "msg_per_minute" in data["desired"]:
msg_per_minute = data["desired"]["msg_per_minute"]
print("Setting value to %s from :: data[\"msg_per_minute\"]" %
msg_per_minute)
if "msg_per_minute" in data:
msg_per_minute = data["msg_per_minute"]
print("Setting value to %s from :: data[\"msg_per_minute\"]" %
msg_per_minute)
if self.ret_flag:
try:
print("setting restart inferense to True")
self.setRestartCamera = True
logger.info("Restarting inferencing")
except Exception as e:
logger.info("Got an issue during cam ON off after twin update")
logger.exception(e)
raise
class HubManager(object):
TIMER_COUNT = 2
TWIN_CONTEXT = 0
SEND_REPORTED_STATE_CONTEXT = 0
def __init__(self, camera_handle, protocol=IoTHubTransportProvider.MQTT):
self.client_protocol = protocol
self.client = IoTHubModuleClient()
self.client.create_from_environment(protocol)
self.iot_camera_handle = camera_handle
# set the time until a message times out
self.client.set_option("messageTimeout", MESSAGE_TIMEOUT)
# sets the callback when a message arrives on "input1" queue. Messages sent to
# other inputs or to the default will be silently discarded.
self.client.set_message_callback("input1", receive_message_callback,
self)
self.client.set_module_twin_callback(self.module_twin_callback, self)
# Forwards the message received onto the next stage in the process.
def forward_event_to_output(self, outputQueueName, event, send_context):
self.client.send_event_async(outputQueueName, event,
send_confirmation_callback, send_context)
def iothub_client_sample_run(self, message):
try:
if self.client.protocol == IoTHubTransportProvider.MQTT:
print("Sending data as reported property...")
reported_state = "{\"rtsp_addr\":\"" + message + "\"}"
self.client.send_reported_state(
reported_state, len(reported_state),
send_reported_state_callback,
self.SEND_REPORTED_STATE_CONTEXT)
status_counter = 0
while status_counter <= self.TIMER_COUNT:
status = self.client.get_send_status()
time.sleep(2)
status_counter += 1
except IoTHubError as iothub_error:
print("Unexpected error %s from IoTHub" % iothub_error)
return
except KeyboardInterrupt:
print("IoTHubClient sample stopped")
def SendMsgToCloud(self, msg):
try:
#logging.info("sending message...")
message = IoTHubMessage(msg)
self.client.send_event_async("output1", message,
send_confirmation_callback, 0)
logging.info("finished sending message...")
except Exception:
print("Exception in SendMsgToCloud")
pass
def module_twin_callback(self, update_state, payload, user_context):
global inference_files_zip_url
global model_url
global label_url
global config_url
global msg_per_minute
global wait_for_minutes
global object_of_interest
print("")
print("Twin callback called with:")
print(" updateStatus: %s" % update_state)
print(" payload: %s" % payload)
data = json.loads(payload)
setRestartCamera = False
if "desired" in data and "inference_files_zip_url" in data["desired"]:
dst_folder = "twin_provided_model"
inference_files_zip_url = data["desired"][
"inference_files_zip_url"]
if inference_files_zip_url:
print(
"Setting value to %s from :: data[\"desired\"][\"all_inference_files_zip\"]"
% inference_files_zip_url)
setRestartCamera = get_file_zip(inference_files_zip_url,
dst_folder)
else:
print(inference_files_zip_url)
if "inference_files_zip_url" in data:
dst_folder = "twin_provided_model"
inference_files_zip_url = data["inference_files_zip_url"]
if inference_files_zip_url:
print(
"Setting value to %s from :: data[\"all_inference_files_zip\"]"
% inference_files_zip_url)
setRestartCamera = get_file_zip(inference_files_zip_url,
dst_folder)
else:
print(inference_files_zip_url)
if "desired" in data and "msg_per_minute" in data["desired"]:
msg_per_minute = data["desired"]["msg_per_minute"]
msg_per_minute = 60 / int(msg_per_minute)
print("Setting value to %s from :: data[\"msg_per_minute\"]" %
msg_per_minute)
if "msg_per_minute" in data:
msg_per_minute = data["msg_per_minute"]
wait_for_minutes = int(60 / int(msg_per_minute))
print("Setting value to %s from :: data[\"msg_per_minute\"]" %
msg_per_minute)
if "desired" in data and "object_of_interest" in data["desired"]:
object_of_interest = data["desired"]["object_of_interest"]
print("Setting value to %s from :: data[\"object_of_interest\"]" %
object_of_interest)
if "object_of_interest" in data:
msg_per_minute = data["object_of_interest"]
print("Setting value to %s from :: data[\"object_of_interest\"]" %
object_of_interest)
if setRestartCamera:
#
try:
logger.info("Restarting VAM to apply new model config")
self.restartInference(self.iot_camera_handle)
except Exception as e:
logger.info("Got an issue during vam ON off after twin update")
logger.exception(e)
raise
def restartInference(self, camera_client):
try:
logger.debug("Restarting VAM to apply new model config")
camera_client.set_overlay_state("off")
if (camera_client.vam_running):
camera_client.set_analytics_state("off")
#time.sleep(1)
camera_client.set_analytics_state("on")
camera_client.set_overlay_state("on")
#self.print_and_send_results()
except Exception as e:
logger.debug(
"System got an exception during vam ON off after twin model update!!! "
)
logger.exception(e)
#self.restart_cam(camera_client)
raise
