Re: [infinispan-dev] Distributed tasks - specifying task input

On 10-12-15 3:03 PM, Manik Surtani wrote: > > I'm gonna cc infinispan-dev as well, so others can pitch in. > > But yeah, good start. I think your dissection of the use cases makes sense, except that I think (a) and (c) are essentially the same; only that in the case of (c) the task ignores any data input. This would raise the question of why would anybody do this, and what purpose does it solve. :-) So yeah, we could support it as a part of (a), but I am less than convinced of its value. Ok, no problem. We just have to somehow bootstrap EntryStreamProcessorContext with no access to cache for c case.

> And as for data locality, perhaps this would work: don't define the necessary keys in the Task, but instead provide these when submitting the task. E.g., > > CacheManager.submitTask(task); // task goes everywhere, and receives an input Iterator of all local entries on each node. > CacheManager.submitTask(task, K...); // task goes to certain nodes that contain some or all of K. Receives an input Iterator of all local entries on each node. > > WDYT? Yes, I agree except I'd rather not submit task using CacheManager API. I'd rather just obtain DistributedTask through CacheManager and use task#execute. That we we do not overpollute CacheManager API. CacheManager cm = ...; DistributedTask task = cm.newDistributedTask(...); task.execute(); task.execute(K...);

Ok, if we agree on this what else remains to be resolved? What did you have in mind for further discussion?