Need to implement dominance rules.. about agora HOT 1 OPEN

Dominance rules

After reading Wellman and Walsh I think we need to implement a hierarchy of dominance rules...

Base trait would be a mixin called DominanceRule...

trait DominanceRule[A <: AskOrder with Persistent, B <: BidOrder with Persistent] {
  this: AuctionLike[A, B] =>

  def place(order: A): Either[Reject, Accept]

  def place(order: B): Either[Reject, Accept]
 
}

...the way I have sketched it above, each DominanceRule would need to provide a specific implementation of the place(order: ???): Either[Reject, Accept] methods. Examples...

• an AscendingRule requiring that an acceptable Order be superior to an existing order issued by the same agent.
• a DescendingRule requiring that an acceptable Order be inferior to an existing order issued by the same agent.

...note that these rules implicitly assume that auction has a mechanism for identifying which orders were issued by a particular agent. That functionality exists in the current implementation but is not fast (i.e., would be O(n) operation).

"Beat-the-Quote" dominance rules

Also need to define dominance rules that impose restrictions on acceptable orders based on the current best buy/sell orders. In addition to analogous versions of the ascending and descending rules, we should also implement a SpreadReductionRule that imposes an AscendingRule on BidOrder and a DescendingRule on AskOrder.

from agora.