photoprism/internal/workers/workers.go

115 lines
3 KiB
Go

/*
Package workers contains background workers for file sync & metadata optimization.
Copyright (c) 2018 - 2021 Michael Mayer <hello@photoprism.org>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
PhotoPrism® is a registered trademark of Michael Mayer. You may use it as required
to describe our software, run your own server, for educational purposes, but not for
offering commercial goods, products, or services without prior written permission.
In other words, please ask.
Feel free to send an e-mail to hello@photoprism.org if you have questions,
want to support our work, or just want to say hello.
Additional information can be found in our Developer Guide:
https://docs.photoprism.org/developer-guide/
*/
package workers
import (
"time"
"github.com/photoprism/photoprism/internal/config"
"github.com/photoprism/photoprism/internal/event"
"github.com/photoprism/photoprism/internal/mutex"
)
var log = event.Log
var stop = make(chan bool, 1)
// Start runs the metadata, share & sync background workers at regular intervals.
func Start(conf *config.Config) {
interval := conf.WakeupInterval()
// Disabled in safe mode?
if interval.Seconds() <= 0 {
log.Warnf("config: disabled metadata, share & sync background workers")
return
}
ticker := time.NewTicker(interval)
go func() {
for {
select {
case <-stop:
log.Info("shutting down workers")
ticker.Stop()
mutex.MetaWorker.Cancel()
mutex.ShareWorker.Cancel()
mutex.SyncWorker.Cancel()
return
case <-ticker.C:
StartMeta(conf)
StartShare(conf)
StartSync(conf)
}
}
}()
}
// Stop shuts down all service workers.
func Stop() {
stop <- true
}
// StartMeta runs the metadata worker once.
func StartMeta(conf *config.Config) {
if !mutex.WorkersBusy() {
go func() {
worker := NewMeta(conf)
if err := worker.Start(time.Minute, false); err != nil {
log.Warnf("metadata: %s", err)
}
}()
}
}
// StartShare runs the share worker once.
func StartShare(conf *config.Config) {
if !mutex.ShareWorker.Busy() {
go func() {
worker := NewShare(conf)
if err := worker.Start(); err != nil {
log.Warnf("share: %s", err)
}
}()
}
}
// StartSync runs the sync worker once.
func StartSync(conf *config.Config) {
if !mutex.SyncWorker.Busy() {
go func() {
worker := NewSync(conf)
if err := worker.Start(); err != nil {
log.Warnf("sync: %s", err)
}
}()
}
}