Add support ReceiveBatch in servicebus.py

[lezi226]

Hi, currently servicebus.py only support to get one message at a time. It's slow if I have many message to handle.
Can you add ReceiveBatch support? ReceiveBatch exist in C# library.

Thanks

[huguesv]

Unfortunately, in this case, there doesn't seem to be a REST API that provides batch receive.
https://msdn.microsoft.com/en-us/library/azure/hh780762.aspx

FYI: C# doesn't go through the REST API, that's why they are both faster and have a different set of functionality.

[lezi226]

Actually, I don't care about the underlying transport.
Why can't you change the transport to the one C# use to provide better functionality?

[huguesv]

If I was you, I wouldn't care about that either. I reached out to someone from the service bus team to let them know about your request. You're not the first to ask/complain about service bus REST API poor performance compared to C#.

[lmazuel]

Just had a discussion with the ServiceBus team. For problem around performance and missing features, the current recommendation from the ServiceBus team is to use AMQP instead of HTTP:
https://azure.microsoft.com/en-us/documentation/articles/service-bus-amqp-python/

The ServiceBus team were not able to propose better performance using HTTP, due to HTTP limit.