That would only work if it's an external state (e.g. state is kept in a database) as opposed to keeping state in memory within the topology.
On Mon, Jun 16, 2014 at 6:38 PM, Romain Leroux <leroux....@gmail.com> wrote: > Can we define a StateFactory (sf) and do those 2 things with it ? (or > would that be a bad practice?) > > - update a state with something like partitionAggregate(sf) or > partitionPersist(sf) > > - create a newStatic(sf) for querying this state (that we have updated) > later in the topology > > > On Jun 17, 2014 2:18 AM, "Nathan Marz" <nat...@nathanmarz.com> wrote: > >> Static state just refers to a state that is not maintained by your >> Trident topology but which you still want to be able to query, so something >> like a database that some other system is responsible for updating. >> >> >> On Mon, Jun 16, 2014 at 4:21 AM, Carlos Rodriguez <crre...@gmail.com> >> wrote: >> >>> Hi guys, >>> >>> We are using Riak as a State to write and read data from different riak >>> buckets. (We are using this code >>> https://github.com/hackreduce/storm-hackathon/blob/master/src/main/java/org/hackreduce/storm/example/riak/RiakBackingMap.java >>> ) >>> >>> We first write to a bucket with partitionPersist, which returns a >>> TridentState var, and then we get data from this bucket with the >>> TridentState var returned previously. >>> >>> The problem is that sometimes we just need to read (because another >>> process is filling this bucket with data), so no partitionPersist is done, >>> and therefore we have no TridentState var to get data from that bucket. >>> >>> I've seen in the Trident State API doc ( >>> https://github.com/nathanmarz/storm/wiki/Trident-state) a call to >>> topology.newStaticState(), and thought that maybe it would do the trick. >>> >>> I didn't find more info about these "Static" states, so I would like to >>> know what does "Static" means in that context and the difference between >>> this and the TridentState var returned when a partitonPersist() is done. >>> >>> Greetings, >>> Carlos >>> >> >> >> >> -- >> Twitter: @nathanmarz >> http://nathanmarz.com >> > -- Twitter: @nathanmarz http://nathanmarz.com
