[Twisted-Python] Handling PBConnectionLost errors

[Daniel Miller]

David, Nicola and Phil,

Thanks very much for your feedback to my questions on this discussion  
thread. I have devised a working solution. Failed remote method calls  
due to dropped connections now seems to be a thing of the past (knock  
on wood...). I have attached a file that contains my "RecallClient"  
and "RecallServer" implementations as well as a very short example to  
show how they can be used (the usage examples are untested). Note  
that this implementation is tailored to my specific needs, and  
therefore is definitely not a general solution. Here are some notable  
limitations (there may be more):

1. The client is tightly coupled to the pb.Root object.
2. "Posting" server methods cannot return data structures that  
contain deferreds (e.g. a list of deferreds). I'm not sure if that's  
even supported by PB anyway? I haven't tried it so I don't know.

However, maybe it will be useful to someone else? I'd be happy to  
hear your feedback if you decide to take a look at it.

~ Daniel

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