Updated description of gatekeeper protocol
This commit is contained in:
parent
9864ce0ec8
commit
7797a3cd09
|
@ -13,8 +13,37 @@ Step = <<rec> @stepType symbol [@detail any]> .
|
|||
# ---------------------------------------------------------------------------
|
||||
# Protocol at dataspaces *associated* with gatekeeper entities
|
||||
|
||||
# Assertion. Gatekeeper will compute an appropriate PathStep from `description` pointing at
|
||||
# `target`, and will respond with a `Bound` to `observer` (if supplied).
|
||||
# ## Handling `Resolve` requests
|
||||
#
|
||||
# When the gatekeeper entity receives a `Resolve` assertion (call it R1), it
|
||||
#
|
||||
# 1. asserts a `Resolve` (call it R2) into its associated dataspace that
|
||||
# is the same as R1 except it has a different `observer`; and
|
||||
#
|
||||
# 2. observes a `Bind` with `description` matching the `step` of R1/R2
|
||||
# according to `stepType` (e.g. treatment of SturdyStepType is not the
|
||||
# same as treatment of NoiseStepType).
|
||||
#
|
||||
# Normally, an appropriate `Bind` is expected to exist. If the gatekeeper
|
||||
# sees the `Bind` first, it takes the `target` from it and does whatever
|
||||
# `stepType` mandates before replying to R1's observer.
|
||||
#
|
||||
# However, if a `Resolved` is asserted to R2's observer before a `Bind`
|
||||
# appears, that resolution is relayed on to R1's observer directly, be it
|
||||
# positive or negative, and the gatekeeper stops waiting for a `Bind`.
|
||||
#
|
||||
# This way, entities can keep an eye out for `Resolve` requests that will
|
||||
# never complete, and answer `Rejected` to them even when no matching
|
||||
# `Bind` exists. Entities could also use `Resolve` requests to synthesize a
|
||||
# `Bind` in a "just-in-time" fashion.
|
||||
#
|
||||
# ## General treatment of `Bind` assertions
|
||||
#
|
||||
# When the gatekeeper sees a `Bind`, independently of any potential
|
||||
# `Resolve` requests, it computes an appropriate PathStep from
|
||||
# `description` pointing at `target`, and responds with a `Bound` to
|
||||
# `observer` (if supplied).
|
||||
#
|
||||
Bind = <bind @description Description @target #:any @observer BindObserver> .
|
||||
Description = <<rec> @stepType symbol [@detail any]> .
|
||||
BindObserver = @present #:Bound / @absent #f .
|
||||
|
|
Loading…
Reference in New Issue