用于与esb通信的amqp层。
swarm-bus的Python项目详细描述
通过amazon sqs实现esb的客户端实现。
简单用法
uri = 'sqs://LOGIN:PASSWORD@'
transport = {
'region': 'eu-west-1',
'exchange': 'swarm',
'queue_name_prefix': 'dev-%(hostname)s-',
'office_hours': False,
'use_priorities': True,
'priorities': ['low', 'high']
}
queues = {
'my_queue': {
'route': 'my.queue.route', # Specific route
'sleep': 60, # Seconds before next call to SQS
'visibility': 1800, # Visibility message in queue
'wait': 10 # Long polling seconds
},
'my_second_queue': {} # Will be automaticaly filled/completed
}
bus = AMQP(uri, transport, queues)
bus.connect()
# We purge a known queue
bus.purge_queue('my_queue')
# Now we add a new queue on the fly
bus.register_queue('new_queue', {'wait': 20})
bus.close()
用作制作人
with AMQP(uri, transport, queues) as producer:
producer.publish(
'my_queue',
{'id': 42},
1 # Optional, specify 'high' priority queue
)
作为消费者使用
def print_routing_key(body, message):
id_ = body['id']
rk = message.delivery_info['routing_key']
print("[x] %r:%r" % (rk, id_))
def ack_message(body, message):
message.ack()
def error_handler(body, message):
raise ValueError('Error while processing message')
with AMQP(uri, transport, queues) as consumer:
consumer.consume(
'my_queue',
[print_routing_key, ack_message],
error_handler
)
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