def Listner(Host, Port, SSL, QueueName, ExchangeName, ConfigPaths):
#Choosing between normal connection to secure connection
if SSL:
connection = pika.BlockingConnection(
pika.ConnectionParameters(Host, Port, ssl=True, ssl_options=SSL))
else:
connection = pika.BlockingConnection(
pika.ConnectionParameters(Host, Port))
channel = connection.channel()
disp = Dispatcher(ConfigPaths)
#Loading Algorithms configurations
disp.loadAlgorithms(ConfigPaths['prefix'] +
ConfigPaths['ConfigAlgorithms'] + '/Algorithms.yml')
#Loading Commands configurations
disp.loadCommands(ConfigPaths['prefix'] + ConfigPaths['ConfigAlgorithms'] +
'/Commands.json')
channel.exchange_declare(exchange=ExchangeName, durable=True)
channel.queue_declare(queue=QueueName)
channel.queue_bind(exchange=ExchangeName, queue=QueueName)
channel.exchange_declare(exchange='rpc_queue')
channel.queue_declare(queue='rpc_queue')
channel.queue_bind(exchange='rpc_queue', queue='rpc_queue')
print(' [*] Waiting for messages. To exit press CTRL+C')
#Method for NO-RPC call
def callback(ch, method, properties, body):
text = body.decode(encoding="utf-8", errors="strict")
print(text)
if (text == 'Hello World!') or (text == 'hello'):
ch.basic_ack(delivery_tag=method.delivery_tag)
return
Stringio = StringIO(body)
data = json.load(Stringio)
if data['Command'] == disp.getCommand('Add Participant'):
print('Add-Participant')
print(disp.addParticipant(data['Participant']))
print('Everything OK')
if data['Command'] == disp.getCommand('Insert Event'):
print('Add-Compute')
global ids
data['Event']['ID'] = str(ids)
ids = ids + 1
eve = disp.insertEvent(data['Participant'], data['Event'])
if not eve:
print("Somenthing wrong!!")
else:
print("EventID:" + str(eve[0]))
disp.compute(data['Participant'], eve)
print(" [x] Done!")
ch.basic_ack(delivery_tag=method.delivery_tag)
#Method for RPC CALL
def on_request(ch, method, props, body):
try:
text = body.decode(encoding="utf-8", errors="strict")
#parsing data
Stringio = StringIO(text)
data = json.load(Stringio)
#print(data)
if data['Command'] == disp.getCommand('Add Participant'):
print('Add Participant')
ret = disp.addParticipant(data['Participant'])
if ret:
response = 'ACK From Add Participant'
else:
response = 'NACK From Add Participant'
if data['Command'] == disp.getCommand('Insert Event'):
print('Insert Event')
global ids
data['Event']['ID'] = str(
ids) + '_' + data['TimeStamp'] + '_' + data['Participant']
ids = ids + 1
eve = disp.insertEvent(data['Participant'], data['Event'])
if not eve:
response = 'NACK From Insert Event'
else:
print("EventID:" + str(eve[0]))
response = 'ID:' + str(eve[0])
disp.compute(data['Participant'], eve)
if data['Command'] == disp.getCommand('List Event'):
response = ''
for event in disp.getAllEventFromParticipant(
data['Participant']):
#print(event)
printevent = event.getPrintEvent()
response = response + str(printevent) + '\n'
if response == '':
response = 'Nothing to show From List Event'
if data['Command'] == disp.getCommand('Delete Event'):
ret = disp.deleteEvent(data['Participant'], data['ID'])
if ret:
response = 'ACK From List Event'
else:
response = 'NACK From List Event'
if data['Command'] == disp.getCommand('Delete Password'):
ret = disp.deletePassword(data['Participant'],
data['Event']['HashPassword'])
if ret:
response = 'ACK From Delete Password'
else:
response = 'NACK Frome Delete Password'
if data['Command'] == disp.getCommand('Delete WebSite'):
disp.deleteWebsite(data['Participant'],
data['Event']['Website'])
if data['Command'] == disp.getCommand('Delete All Event'):
ret = True
for event in disp.getAllEventFromParticipant(
data['Participant']):
#print(event)
ret = ret and disp.deleteEvent(data['Participant'],
event.data['ID'])
if ret:
response = 'ACK From All Event'
else:
response = 'NACK From All Event'
if data['Command'] == disp.getCommand('Delete Participant'):
ret = disp.deleteParticipant(data['Participant'])
if ret:
response = 'ACK From Delete Participant'
else:
response = 'NACK From Delete Participant'
#sending response
ch.basic_publish(exchange='',
routing_key=props.reply_to,
properties=pika.BasicProperties(
correlation_id=props.correlation_id),
body=response)
ch.basic_ack(delivery_tag=method.delivery_tag)
print(response)
except:
traceback.print_exc(file=sys.stdout)
ch.basic_publish(exchange='',
routing_key=props.reply_to,
properties=pika.BasicProperties(
correlation_id=props.correlation_id),
body='ERROR SOMETHING GOES WRONG!')
ch.basic_ack(delivery_tag=method.delivery_tag)
channel.basic_qos(prefetch_count=1)
channel.basic_consume(on_request, queue='rpc_queue')
channel.start_consuming()
