[Twisted-Python] Returning a deferred from buildProtocol t.i.p.Factory

[L. Daniel Burr]

Hi Tom,

On 11/16/13 8:09 AM, Tom van Neerijnen wrote:
> Hi all
>
> I'm building a simple TCP load balancer based on a code snippet from 
> Glyph on SO: 
> http://stackoverflow.com/questions/4096061/general-question-regarding-wether-or-not-use-twisted-in-tcp-proxy-project
>
> It's served me well but I can't work out how to convert Glyphs round 
> robin retrieval of the server endpoint into an async balancing 
> decision in the buildProtocol method of the Factory. If I return a 
> deferred here it fails with an AttributeError: Deferred instance has 
> no attribute 'makeConnection'.
[SNIP]

Have you considered using https://pypi.python.org/pypi/txLoadBalancer as 
the basis for your load-balancer?  It supports random, round-robin, 
least-connections, and weighted, so perhaps it would suit your needs.

Hope this helps,

L. Daniel Burr