Enhance BatchRequestCore (and implement node-side equivalent)

[gavin-norman-sociomantic]

The existing request core is fairly minimal. I'm sure there's a lot more common code that could be added (basic fiber implementations, for example).

Ditto for the node side of the equation (where no core code exists atm).

[gavin-norman-sociomantic]

This could include the whole record batch management, as well (on both sides).

[gavin-norman-sociomantic]

It should use the new record batcher, too.

[gavin-norman-sociomantic]

Should probably include https://github.com/sociomantic-tsunami/dlsproto/pull/84 by default.

[nemanja-boric-sociomantic]

Btw, I the code pretty much ready, I'll clean it up and submit a PR in the next few days. I've successfully converted DMQ's Consume request and DLS's GetRange reqeuest to use it.

[nemanja-boric-sociomantic]

Oh, yes, I think it should include that feature by default (it also includes double-buffering).

[gavin-norman-sociomantic]

Should use https://github.com/sociomantic-tsunami/swarm/blob/v4.x.x/src/swarm/neo/util/Batch.d internally (at the request's option?).

[nemanja-boric-sociomantic]

Feature: extend finished notification to indicate the number of nodes where the request finished successfully/with an error.

[nemanja-boric-sociomantic]

related: https://github.com/sociomantic-tsunami/dmqproto/issues/72#issuecomment-405617657

[gavin-norman-sociomantic]

Btw, I the code pretty much ready, I'll clean it up and submit a PR in the next few days. I've successfully converted DMQ's Consume request and DLS's GetRange reqeuest to use it.

:(

[gavin-norman-sociomantic]

Moved to v5.5.0.