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Don't block if there are PDUs waiting

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This commit is contained in:
Neil Alexander 2020-06-30 14:32:05 +01:00
parent 5082179ce3
commit 51dba37d7a
1 changed files with 39 additions and 37 deletions
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76
federationsender/queue/destinationqueue.go
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@ -184,44 +184,46 @@ func (oq *destinationQueue) backgroundSend() {
// Wait either for incoming events, or until we hit an
// idle timeout.
select {
case <-oq.incomingPDUs:
// There are new PDUs waiting in the database.
case edu := <-oq.incomingEDUs:
// Likewise for EDUs, although we should probably not try
// too hard with some EDUs (like typing notifications) after
// a certain amount of time has passed.
// TODO: think about EDU expiry some more
oq.pendingEDUs = append(oq.pendingEDUs, edu)
// If there are any more things waiting in the channel queue
// then read them. This is safe because we guarantee only
// having one goroutine per destination queue, so the channel
// isn't being consumed anywhere else.
for len(oq.incomingEDUs) > 0 {
oq.pendingEDUs = append(oq.pendingEDUs, <-oq.incomingEDUs)
if len(oq.pendingPDUs) == 0 {
select {
case <-oq.incomingPDUs:
// There are new PDUs waiting in the database.
case edu := <-oq.incomingEDUs:
// Likewise for EDUs, although we should probably not try
// too hard with some EDUs (like typing notifications) after
// a certain amount of time has passed.
// TODO: think about EDU expiry some more
oq.pendingEDUs = append(oq.pendingEDUs, edu)
// If there are any more things waiting in the channel queue
// then read them. This is safe because we guarantee only
// having one goroutine per destination queue, so the channel
// isn't being consumed anywhere else.
for len(oq.incomingEDUs) > 0 {
oq.pendingEDUs = append(oq.pendingEDUs, <-oq.incomingEDUs)
}
case invite := <-oq.incomingInvites:
// There's no strict ordering requirement for invites like
// there is for transactions, so we put the invite onto the
// front of the queue. This means that if an invite that is
// stuck failing already, that it won't block our new invite
// from being sent.
oq.pendingInvites = append(
[]*gomatrixserverlib.InviteV2Request{invite},
oq.pendingInvites...,
)
// If there are any more things waiting in the channel queue
// then read them. This is safe because we guarantee only
// having one goroutine per destination queue, so the channel
// isn't being consumed anywhere else.
for len(oq.incomingInvites) > 0 {
oq.pendingInvites = append(oq.pendingInvites, <-oq.incomingInvites)
}
case <-time.After(time.Second * 30):
// The worker is idle so stop the goroutine. It'll
// get restarted automatically the next time we
// get an event.
return
}
case invite := <-oq.incomingInvites:
// There's no strict ordering requirement for invites like
// there is for transactions, so we put the invite onto the
// front of the queue. This means that if an invite that is
// stuck failing already, that it won't block our new invite
// from being sent.
oq.pendingInvites = append(
[]*gomatrixserverlib.InviteV2Request{invite},
oq.pendingInvites...,
)
// If there are any more things waiting in the channel queue
// then read them. This is safe because we guarantee only
// having one goroutine per destination queue, so the channel
// isn't being consumed anywhere else.
for len(oq.incomingInvites) > 0 {
oq.pendingInvites = append(oq.pendingInvites, <-oq.incomingInvites)
}
case <-time.After(time.Second * 30):
// The worker is idle so stop the goroutine. It'll
// get restarted automatically the next time we
// get an event.
return
}
// If we are backing off this server then wait for the