mirror of https://github.com/portainer/portainer
116 lines
3.2 KiB
Go
116 lines
3.2 KiB
Go
package cron
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import (
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"github.com/portainer/portainer"
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"github.com/robfig/cron"
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)
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// JobScheduler represents a service for managing crons
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type JobScheduler struct {
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cron *cron.Cron
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}
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// NewJobScheduler initializes a new service
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func NewJobScheduler() *JobScheduler {
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return &JobScheduler{
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cron: cron.New(),
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}
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}
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// ScheduleJob schedules the execution of a job via a runner
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func (scheduler *JobScheduler) ScheduleJob(runner portainer.JobRunner) error {
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return scheduler.cron.AddJob(runner.GetSchedule().CronExpression, runner)
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}
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// UpdateSystemJobSchedule updates the first occurence of the specified
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// scheduled job based on the specified job type.
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// It does so by re-creating a new cron
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// and adding all the existing jobs. It will then re-schedule the new job
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// with the update cron expression passed in parameter.
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// NOTE: the cron library do not support updating schedules directly
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// hence the work-around
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func (scheduler *JobScheduler) UpdateSystemJobSchedule(jobType portainer.JobType, newCronExpression string) error {
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cronEntries := scheduler.cron.Entries()
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newCron := cron.New()
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for _, entry := range cronEntries {
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if entry.Job.(portainer.JobRunner).GetSchedule().JobType == jobType {
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err := newCron.AddJob(newCronExpression, entry.Job)
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if err != nil {
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return err
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}
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continue
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}
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newCron.Schedule(entry.Schedule, entry.Job)
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}
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scheduler.cron.Stop()
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scheduler.cron = newCron
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scheduler.cron.Start()
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return nil
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}
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// UpdateJobSchedule updates a specific scheduled job by re-creating a new cron
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// and adding all the existing jobs. It will then re-schedule the new job
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// via the specified JobRunner parameter.
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// NOTE: the cron library do not support updating schedules directly
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// hence the work-around
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func (scheduler *JobScheduler) UpdateJobSchedule(runner portainer.JobRunner) error {
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cronEntries := scheduler.cron.Entries()
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newCron := cron.New()
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for _, entry := range cronEntries {
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if entry.Job.(portainer.JobRunner).GetSchedule().ID == runner.GetSchedule().ID {
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var jobRunner cron.Job = runner
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if entry.Job.(portainer.JobRunner).GetSchedule().JobType == portainer.SnapshotJobType {
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jobRunner = entry.Job
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}
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err := newCron.AddJob(runner.GetSchedule().CronExpression, jobRunner)
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if err != nil {
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return err
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}
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continue
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}
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newCron.Schedule(entry.Schedule, entry.Job)
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}
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scheduler.cron.Stop()
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scheduler.cron = newCron
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scheduler.cron.Start()
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return nil
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}
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// UnscheduleJob remove a scheduled job by re-creating a new cron
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// and adding all the existing jobs except for the one specified via scheduleID.
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// NOTE: the cron library do not support removing schedules directly
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// hence the work-around
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func (scheduler *JobScheduler) UnscheduleJob(scheduleID portainer.ScheduleID) {
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cronEntries := scheduler.cron.Entries()
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newCron := cron.New()
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for _, entry := range cronEntries {
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if entry.Job.(portainer.JobRunner).GetSchedule().ID == scheduleID {
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continue
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}
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newCron.Schedule(entry.Schedule, entry.Job)
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}
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scheduler.cron.Stop()
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scheduler.cron = newCron
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scheduler.cron.Start()
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}
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// Start starts the scheduled jobs
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func (scheduler *JobScheduler) Start() {
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if len(scheduler.cron.Entries()) > 0 {
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scheduler.cron.Start()
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}
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}
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