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syncapi: Rename and split out tokens (#1025)

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* syncapi: Rename and split out tokens

Previously we used the badly named `PaginationToken` which was
used for both `/sync` and `/messages` requests. This quickly
became confusing because named fields like `PDUPosition` meant
different things depending on the token type. Instead, we now have
two token types: `TopologyToken` and `StreamingToken`, both of
which have fields which make more sense for their specific situations.

Updated the codebase to use one or the other. `PaginationToken` still
lives on as `syncToken`, an unexported type which both tokens rely on.
This allows us to guarantee that the specific mappings of positions
to a string remain solely under the control of the `types` package.
This enables us to move high-level conceptual things like
"decrement this topological token" to function calls e.g
`TopologicalToken.Decrement()`.

Currently broken because `/messages` seemingly used both stream and
topological tokens, though I need to confirm this.

* final tweaks/hacks

* spurious logging

* Review comments and linting
This commit is contained in:
Kegsay 2020-05-13 12:14:50 +01:00 • committed by GitHub
parent 31e6a7f193
commit 5e9dce1c0c
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15 changed files with 457 additions and 439 deletions
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6
syncapi/sync/requestpool.go
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@ -132,7 +132,7 @@ func (rp *RequestPool) OnIncomingSyncRequest(req *http.Request, device *authtype
}
}
func (rp *RequestPool) currentSyncForUser(req syncRequest, latestPos types.PaginationToken) (res *types.Response, err error) {
func (rp *RequestPool) currentSyncForUser(req syncRequest, latestPos types.StreamingToken) (res *types.Response, err error) {
// TODO: handle ignored users
if req.since == nil {
res, err = rp.db.CompleteSync(req.ctx, req.device.UserID, req.limit)
@ -145,7 +145,7 @@ func (rp *RequestPool) currentSyncForUser(req syncRequest, latestPos types.Pagin
}
accountDataFilter := gomatrixserverlib.DefaultEventFilter() // TODO: use filter provided in req instead
res, err = rp.appendAccountData(res, req.device.UserID, req, latestPos.PDUPosition, &accountDataFilter)
res, err = rp.appendAccountData(res, req.device.UserID, req, latestPos.PDUPosition(), &accountDataFilter)
return
}
@ -187,7 +187,7 @@ func (rp *RequestPool) appendAccountData(
// Sync is not initial, get all account data since the latest sync
dataTypes, err := rp.db.GetAccountDataInRange(
req.ctx, userID,
types.StreamPosition(req.since.PDUPosition), types.StreamPosition(currentPos),
types.StreamPosition(req.since.PDUPosition()), types.StreamPosition(currentPos),
accountDataFilter,
)
if err != nil {