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dcron.go
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dcron.go
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package dcron
import (
"errors"
. "github.com/dlvkin/dcron/driver"
"github.com/robfig/cron/v3"
"sync"
)
//Dcron is main struct
type Dcron struct {
jobs map[string]*JobWarpper
mu sync.RWMutex
cr *cron.Cron
nodePool *NodePool
isRun bool
}
//NewDcron create a Dcron
func NewDcron(serverName string, driver Driver, opts ...cron.Option) *Dcron {
dcron := new(Dcron)
dcron.cr = cron.New(opts...)
dcron.jobs = make(map[string]*JobWarpper)
dcron.nodePool = newNodePool(serverName, driver, dcron)
return dcron
}
//AddJob add a job
func (d *Dcron) AddJob(jobName, cronStr string, job Job) (err error) {
return d.addJob(jobName, cronStr, nil, job)
}
//AddFunc add a cron func
func (d *Dcron) AddFunc(jobName, cronStr string, cmd func()) (err error) {
return d.addJob(jobName, cronStr, cmd, nil)
}
func (d *Dcron) addJob(jobName, cronStr string, cmd func(), job Job) (err error) {
if _, ok := d.jobs[jobName]; ok {
return errors.New("jobName already exist")
}
innerJob := JobWarpper{
Name: jobName,
CronStr: cronStr,
Func: cmd,
Job: job,
Dcron: d,
}
entryID, err := d.cr.AddJob(cronStr, innerJob)
if err != nil {
return err
}
innerJob.ID = entryID
d.jobs[jobName] = &innerJob
return err
}
// Remove Job
func (d *Dcron) Remove(jobName string) {
if job, ok := d.jobs[jobName]; ok {
delete(d.jobs, jobName)
d.cr.Remove(job.ID)
}
}
func (d *Dcron) allowThisNodeRun(jobName string) bool {
return d.nodePool.NodeID == d.nodePool.PickNodeByJobName(jobName)
}
//Start start job
func (d *Dcron) Start() {
d.mu.Lock()
defer d.mu.Unlock()
if d.nodePool.NodeID == "" {
d.nodePool.InitPoolGrabService()
}
if !d.isRun{
go d.nodePool.tickerUpdatePool()
d.cr.Start()
}
d.isRun = true
}
// Run Job
func (d *Dcron) Run() {
d.isRun = true
d.cr.Run()
}
//Stop stop job
func (d *Dcron) Stop() {
d.isRun = false
d.cr.Stop()
}