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Comment on why event sending is synchronous

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This commit is contained in:
Mark Haines 2017-02-27 09:35:20 +00:00
parent 735d477ad2
commit ea7fd6c845
1 changed files with 6 additions and 1 deletions
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7
src/github.com/matrix-org/dendrite/roomserver/input/latest_events.go
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@ -7,7 +7,8 @@ import (
"github.com/matrix-org/gomatrixserverlib"
)
// updateLatestEvents updates the list of latest events for this room.
// updateLatestEvents updates the list of latest events for this room in the database and writes the
// event to the output log.
// The latest events are the events that aren't referenced by another event in the database:
//
// Time goes down the page. 1 is the m.room.create event (root).
@ -79,6 +80,10 @@ func doUpdateLatestEvents(
// Send the event to the output logs.
// We do this inside the database transaction to ensure that we only mark an event as sent if we sent it.
// TODO: This assumes that writing the event to the output log is synchronous. It should be possible to
// send the event asynchronously but we would need to ensure that 1) the events are written to the log in
// the correct order, 2) that pending writes are resent across restarts. In order to avoid writing all the
// necessary bookkeeping we'll keep the event sending synchronous for now.
if err = writeEvent(ow, lastEventIDSent, event, newLatest); err != nil {
return err
}