gistfile1.txt

<mjr_> If you have an object that contains a JSON array of bucket, key pairs, 
can you use that as a starting point in mapred? 

17:58 <aphyr> yes. 
 
17:59 <aphyr> mjr_: you start the mapreduce phase with that object as your sole input 

17:59 <aphyr> A map phase returns the list of bucket, key pairs 

17:59 <aphyr> then the subsequent map phase will operate on those 

18:00 <mjr_> is there some builtin function or something that fetches the contents? 

18:00 <aphyr> It'd be implementation-dependent. 

18:01 <aphyr> Here's a trivial one: function(v) { return JSON.parse(v.data); } 

18:01 <aphyr> (if you structure your data as JSON and store a list of [bucket, key] pairs 

18:01 <mjr_> So v = ["users", "mjr"]; 

18:02 <mjr_> Just returning that tuple returns two strings. How do I get 
the contents of /riak/users/mjr in the map function? 

18:02 <aphyr> v = "[[\"users\", \"mjr\"]]" 

18:02 <aphyr> The input to a map phase is a list of key, value, keydata lists. 

18:03 <aphyr> Er, sorry, [bucket, key, keydata] 

18:03 <mjr_> ohh 

18:03 <aphyr> So the next map phase would be called with the actual 
data of /riak/users/mjr 

18:03 <mjr_> oh, cool. That's perfect