def handle(self):
with closing(self.odb.session()) as session:
input = self.request.input
# Let's see if we already have a channel of that name before committing
# any stuff into the database.
existing_one = session.query(ChannelAMQP.id).\
filter(ConnDefAMQP.cluster_id==input.cluster_id).\
filter(ChannelAMQP.def_id==ConnDefAMQP.id).\
filter(ChannelAMQP.name==input.name).\
first()
if existing_one:
raise Exception('An AMQP channel `{}` already exists on this cluster'.format(input.name))
# Is the service's name correct?
service = session.query(Service).\
filter(Cluster.id==input.cluster_id).\
filter(Service.cluster_id==Cluster.id).\
filter(Service.name==input.service).\
first()
if not service:
msg = 'Service `{}` does not exist on this cluster'.format(input.service)
raise Exception(msg)
try:
item = ChannelAMQP()
item.name = input.name
item.is_active = input.is_active
item.queue = input.queue
item.consumer_tag_prefix = input.consumer_tag_prefix
item.def_id = input.def_id
item.service = service
item.pool_size = input.pool_size
item.ack_mode = input.ack_mode
item.prefetch_count = input.prefetch_count
item.queue_priority = input.queue_priority
item.data_format = input.data_format
session.add(item)
session.commit()
input.action = CHANNEL.AMQP_CREATE.value
input.def_name = item.def_.name
input.id = item.id
input.service_name = service.name
self.broker_client.publish(input)
self.response.payload.id = item.id
self.response.payload.name = item.name
except Exception, e:
self.logger.error('Could not create an AMQP channel, e:`%s`', format_exc(e))
session.rollback()
raise
