8e32eeb5de
* Hold the event source when there are no listeners The event source does not need to run when there are no listeners. Therefore pause it when there are none. * add some more logging Signed-off-by: Andrew Thornton <art27@cantab.net>
83 lines
2.0 KiB
Go
83 lines
2.0 KiB
Go
// Copyright 2020 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package eventsource
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import (
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"context"
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"time"
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"code.gitea.io/gitea/models"
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"code.gitea.io/gitea/modules/graceful"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/timeutil"
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)
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// Init starts this eventsource
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func (m *Manager) Init() {
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if setting.UI.Notification.EventSourceUpdateTime <= 0 {
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return
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}
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go graceful.GetManager().RunWithShutdownContext(m.Run)
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}
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// Run runs the manager within a provided context
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func (m *Manager) Run(ctx context.Context) {
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then := timeutil.TimeStampNow().Add(-2)
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timer := time.NewTicker(setting.UI.Notification.EventSourceUpdateTime)
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loop:
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for {
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select {
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case <-ctx.Done():
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timer.Stop()
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break loop
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case <-timer.C:
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m.mutex.Lock()
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connectionCount := len(m.messengers)
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if connectionCount == 0 {
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log.Trace("Event source has no listeners")
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// empty the connection channel
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select {
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case <-m.connection:
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default:
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}
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}
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m.mutex.Unlock()
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if connectionCount == 0 {
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// No listeners so the source can be paused
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log.Trace("Pausing the eventsource")
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select {
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case <-ctx.Done():
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break loop
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case <-m.connection:
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log.Trace("Connection detected - restarting the eventsource")
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// OK we're back so lets reset the timer and start again
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// We won't change the "then" time because there could be concurrency issues
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select {
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case <-timer.C:
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default:
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}
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continue
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}
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}
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now := timeutil.TimeStampNow().Add(-2)
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uidCounts, err := models.GetUIDsAndNotificationCounts(then, now)
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if err != nil {
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log.Error("Unable to get UIDcounts: %v", err)
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}
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for _, uidCount := range uidCounts {
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m.SendMessage(uidCount.UserID, &Event{
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Name: "notification-count",
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Data: uidCount,
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})
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}
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then = now
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}
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}
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m.UnregisterAll()
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}
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