RabbitMQ basic_publish是异步的吗？

Question

I have the following Producer code.

message is a dict data obtained after some computations. I want to publish message to a queue. Then I reset message to an empty dict for some other calculations. But the consumer is always getting an empty dict from the queue. I feel message is reset before it is published(is it asynchronous?). How to make it synchronous ?

message = {a big dict ...}
channel.basic_publish(exchange='',
                            routing_key='my_queue',
                            body=json.dumps(message))
message = {}

Answer 1

Yes, channel.basic_publish is async, and it is correct in this way.

channel.basic_publish does not wait the insert time, otherwise, It'd be slow.

you should change the way how you handle your messages, but if you want to make is synchronous you can use the transactions.

should be something like:

channel.tx_select
channel.basic_publish(exchange='',
                            routing_key='my_queue',
                            body=json.dumps(message))
channel.tx_commit

Note transaction can drop the performances.

Read here for more detail