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// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
package jobs
import (
"fmt"
"sync"
"time"
"github.com/mattermost/mattermost-server/mlog"
"github.com/mattermost/mattermost-server/model"
)
type Schedulers struct {
stop chan bool
stopped chan bool
configChanged chan *model.Config
clusterLeaderChanged chan bool
listenerId string
startOnce sync.Once
jobs *JobServer
schedulers []model.Scheduler
nextRunTimes []*time.Time
}
func (srv *JobServer) InitSchedulers() *Schedulers {
mlog.Debug("Initialising schedulers.")
schedulers := &Schedulers{
stop: make(chan bool),
stopped: make(chan bool),
configChanged: make(chan *model.Config),
clusterLeaderChanged: make(chan bool),
jobs: srv,
}
if srv.DataRetentionJob != nil {
schedulers.schedulers = append(schedulers.schedulers, srv.DataRetentionJob.MakeScheduler())
}
if srv.MessageExportJob != nil {
schedulers.schedulers = append(schedulers.schedulers, srv.MessageExportJob.MakeScheduler())
}
if elasticsearchAggregatorInterface := srv.ElasticsearchAggregator; elasticsearchAggregatorInterface != nil {
schedulers.schedulers = append(schedulers.schedulers, elasticsearchAggregatorInterface.MakeScheduler())
}
if ldapSyncInterface := srv.LdapSync; ldapSyncInterface != nil {
schedulers.schedulers = append(schedulers.schedulers, ldapSyncInterface.MakeScheduler())
}
if migrationsInterface := srv.Migrations; migrationsInterface != nil {
schedulers.schedulers = append(schedulers.schedulers, migrationsInterface.MakeScheduler())
}
if pluginsInterface := srv.Plugins; pluginsInterface != nil {
schedulers.schedulers = append(schedulers.schedulers, pluginsInterface.MakeScheduler())
}
schedulers.nextRunTimes = make([]*time.Time, len(schedulers.schedulers))
return schedulers
}
func (schedulers *Schedulers) Start() *Schedulers {
schedulers.listenerId = schedulers.jobs.ConfigService.AddConfigListener(schedulers.handleConfigChange)
go func() {
schedulers.startOnce.Do(func() {
mlog.Info("Starting schedulers.")
defer func() {
mlog.Info("Schedulers stopped.")
close(schedulers.stopped)
}()
now := time.Now()
for idx, scheduler := range schedulers.schedulers {
if !scheduler.Enabled(schedulers.jobs.Config()) {
schedulers.nextRunTimes[idx] = nil
} else {
schedulers.setNextRunTime(schedulers.jobs.Config(), idx, now, false)
}
}
for {
select {
case <-schedulers.stop:
mlog.Debug("Schedulers received stop signal.")
return
case now = <-time.After(1 * time.Minute):
cfg := schedulers.jobs.Config()
for idx, nextTime := range schedulers.nextRunTimes {
if nextTime == nil {
continue
}
if time.Now().After(*nextTime) {
scheduler := schedulers.schedulers[idx]
if scheduler != nil {
if scheduler.Enabled(cfg) {
if _, err := schedulers.scheduleJob(cfg, scheduler); err != nil {
mlog.Warn(fmt.Sprintf("Failed to schedule job with scheduler: %v", scheduler.Name()))
mlog.Error(fmt.Sprint(err))
} else {
schedulers.setNextRunTime(cfg, idx, now, true)
}
}
}
}
}
case newCfg := <-schedulers.configChanged:
for idx, scheduler := range schedulers.schedulers {
if !scheduler.Enabled(newCfg) {
schedulers.nextRunTimes[idx] = nil
} else {
schedulers.setNextRunTime(newCfg, idx, now, false)
}
}
case isLeader := <-schedulers.clusterLeaderChanged:
for idx := range schedulers.schedulers {
if !isLeader {
schedulers.nextRunTimes[idx] = nil
} else {
schedulers.setNextRunTime(schedulers.jobs.Config(), idx, now, false)
}
}
}
}
})
}()
return schedulers
}
func (schedulers *Schedulers) Stop() *Schedulers {
mlog.Info("Stopping schedulers.")
close(schedulers.stop)
<-schedulers.stopped
return schedulers
}
func (schedulers *Schedulers) setNextRunTime(cfg *model.Config, idx int, now time.Time, pendingJobs bool) {
scheduler := schedulers.schedulers[idx]
if !pendingJobs {
if pj, err := schedulers.jobs.CheckForPendingJobsByType(scheduler.JobType()); err != nil {
mlog.Error("Failed to set next job run time: " + err.Error())
schedulers.nextRunTimes[idx] = nil
return
} else {
pendingJobs = pj
}
}
lastSuccessfulJob, err := schedulers.jobs.GetLastSuccessfulJobByType(scheduler.JobType())
if err != nil {
mlog.Error("Failed to set next job run time: " + err.Error())
schedulers.nextRunTimes[idx] = nil
return
}
schedulers.nextRunTimes[idx] = scheduler.NextScheduleTime(cfg, now, pendingJobs, lastSuccessfulJob)
mlog.Debug(fmt.Sprintf("Next run time for scheduler %v: %v", scheduler.Name(), schedulers.nextRunTimes[idx]))
}
func (schedulers *Schedulers) scheduleJob(cfg *model.Config, scheduler model.Scheduler) (*model.Job, *model.AppError) {
pendingJobs, err := schedulers.jobs.CheckForPendingJobsByType(scheduler.JobType())
if err != nil {
return nil, err
}
lastSuccessfulJob, err2 := schedulers.jobs.GetLastSuccessfulJobByType(scheduler.JobType())
if err2 != nil {
return nil, err
}
return scheduler.ScheduleJob(cfg, pendingJobs, lastSuccessfulJob)
}
func (schedulers *Schedulers) handleConfigChange(oldConfig *model.Config, newConfig *model.Config) {
mlog.Debug("Schedulers received config change.")
schedulers.configChanged <- newConfig
}
func (schedulers *Schedulers) HandleClusterLeaderChange(isLeader bool) {
select {
case schedulers.clusterLeaderChanged <- isLeader:
default:
mlog.Debug("Did not send cluster leader change message to schedulers as no schedulers listening to notification channel.")
}
}
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