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Use topological ordering for /messages response (#966)

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* Use topological ordering for /messages response

* Update gomatrixserverlib
This commit is contained in:
Neil Alexander 2020-04-15 16:10:18 +01:00 committed by GitHub
parent 7b3edf4622
commit dadb06f6ad
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3 changed files with 8 additions and 23 deletions
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2
go.mod
View file

@ -17,7 +17,7 @@ require (
github.com/matrix-org/go-http-js-libp2p v0.0.0-20200318135427-31631a9ef51f
github.com/matrix-org/go-sqlite3-js v0.0.0-20200325174927-327088cdef10
github.com/matrix-org/gomatrix v0.0.0-20190528120928-7df988a63f26
github.com/matrix-org/gomatrixserverlib v0.0.0-20200409140603-8b9a51fe9b89
github.com/matrix-org/gomatrixserverlib v0.0.0-20200415145257-d492cd4be836
github.com/matrix-org/naffka v0.0.0-20200127221512-0716baaabaf1
github.com/matrix-org/util v0.0.0-20190711121626-527ce5ddefc7
github.com/mattn/go-sqlite3 v2.0.3+incompatible

4
go.sum
View file

@ -362,8 +362,8 @@ github.com/matrix-org/gomatrix v0.0.0-20190528120928-7df988a63f26 h1:Hr3zjRsq2bh
github.com/matrix-org/gomatrix v0.0.0-20190528120928-7df988a63f26/go.mod h1:3fxX6gUjWyI/2Bt7J1OLhpCzOfO/bB3AiX0cJtEKud0=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200124100636-0c2ec91d1df5 h1:kmRjpmFOenVpOaV/DRlo9p6z/IbOKlUC+hhKsAAh8Qg=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200124100636-0c2ec91d1df5/go.mod h1:FsKa2pWE/bpQql9H7U4boOPXFoJX/QcqaZZ6ijLkaZI=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200409140603-8b9a51fe9b89 h1:YAlUJK/Ty2ZrP/DL41CiR0Cp3pteshnyIS420KVs220=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200409140603-8b9a51fe9b89/go.mod h1:FsKa2pWE/bpQql9H7U4boOPXFoJX/QcqaZZ6ijLkaZI=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200415145257-d492cd4be836 h1:YiXBJ/0ZeBzuh9Ym0iYaJgDBlFdz7nIVKArqkkEgPzM=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200415145257-d492cd4be836/go.mod h1:FsKa2pWE/bpQql9H7U4boOPXFoJX/QcqaZZ6ijLkaZI=
github.com/matrix-org/naffka v0.0.0-20200127221512-0716baaabaf1 h1:osLoFdOy+ChQqVUn2PeTDETFftVkl4w9t/OW18g3lnk=
github.com/matrix-org/naffka v0.0.0-20200127221512-0716baaabaf1/go.mod h1:cXoYQIENbdWIQHt1SyCo6Bl3C3raHwJ0wgVrXHSqf+A=
github.com/matrix-org/util v0.0.0-20171127121716-2e2df66af2f5 h1:W7l5CP4V7wPyPb4tYE11dbmeAOwtFQBTW0rf4OonOS8=

25
syncapi/routing/messages.go
View file

@ -209,18 +209,12 @@ func (r *messagesReq) retrieveEvents() (
return []gomatrixserverlib.ClientEvent{}, r.from, r.to, nil
}
// Sort the events to ensure we send them in the right order. We currently
// do that based on the event's timestamp.
// Sort the events to ensure we send them in the right order.
events = gomatrixserverlib.HeaderedReverseTopologicalOrdering(events)
if r.backwardOrdering {
sort.SliceStable(events, func(i int, j int) bool {
// Backward ordering is antichronological (latest event to oldest
// one).
return sortEvents(&(events[j]), &(events[i]))
})
} else {
sort.SliceStable(events, func(i int, j int) bool {
// Forward ordering is chronological (oldest event to latest one).
return sortEvents(&(events[i]), &(events[j]))
// This reverses the array from old->new to new->old
sort.SliceStable(events, func(i, j int) bool {
return true
})
}
@ -493,12 +487,3 @@ func setToDefault(
return
}
// sortEvents is a function to give to sort.SliceStable, and compares the
// timestamp of two Matrix events.
// Returns true if the first event happened before the second one, false
// otherwise.
func sortEvents(e1 *gomatrixserverlib.HeaderedEvent, e2 *gomatrixserverlib.HeaderedEvent) bool {
t := e1.OriginServerTS().Time()
return e2.OriginServerTS().Time().After(t)
}