robk-tahoe e5487bbe21 stats: added IStatsProducer interface, fixed stats provider startup ... this adds an interface, IStatsProducer, defining the get_stats() method which the stats provider calls upon and registered producer, and made the register_producer() method check that interface is implemented. also refine the startup logic, so that the stats provider doesn't try and connect out to the stats gatherer until after the node declares the tub 'ready'. this is to address an issue whereby providers would attach to the gatherer without providing a valid furl, and hence the gatherer would be unable to determine the tubid of the connected client, leading to lost samples.		2008-01-31 21:10:15 -07:00
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allmydata	stats: added IStatsProducer interface, fixed stats provider startup	2008-01-31 21:10:15 -07:00