/
cache.go
401 lines (334 loc) · 7.87 KB
/
cache.go
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package job
import (
"errors"
"fmt"
"os"
"os/signal"
"sync"
"syscall"
"time"
"github.com/cornelk/hashmap"
log "github.com/sirupsen/logrus"
)
var (
ErrJobDoesntExist = errors.New("The job you requested does not exist")
)
type JobCache interface {
Get(id string) (*Job, error)
GetAll() *JobsMap
Set(j *Job) error
Delete(id string) error
Persist() error
Enable(j *Job) error
Disable(j *Job) error
SaveRun(run *JobStat) error
UpdateRun(run *JobStat) error
DeleteRun(runId string) error
GetAllRuns(jobID string) ([]*JobStat, error)
GetRun(runID string) (*JobStat, error)
ClearExpiredRuns() error
}
type JobsMap struct {
Jobs map[string]*Job
Lock sync.RWMutex
}
func NewJobsMap() *JobsMap {
return &JobsMap{
Jobs: map[string]*Job{},
Lock: sync.RWMutex{},
}
}
type MemoryJobCache struct {
// Jobs is a map from Job id's to pointers to the jobs.
// Used as the main "data store" within this cache implementation.
jobs *JobsMap
jobDB JobDB
}
func NewMemoryJobCache(jobDB JobDB) *MemoryJobCache {
return &MemoryJobCache{
jobs: NewJobsMap(),
jobDB: jobDB,
}
}
func (c *MemoryJobCache) Start() {
// Prep cache
allJobs, err := c.jobDB.GetAll()
if err != nil {
log.Fatal(err)
}
for _, j := range allJobs {
if j.ShouldStartWaiting() {
j.StartWaiting(c, false)
}
err = c.Set(j)
if err != nil {
log.Errorln(err)
}
}
// Process-level defer for shutting down the db.
ch := make(chan os.Signal)
signal.Notify(ch, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT)
go func() {
s := <-ch
log.Infof("Process got signal: %s", s)
log.Infof("Shutting down....")
// Persist all jobs to database
log.Errorln(c.Persist())
// Close the database
c.jobDB.Close()
os.Exit(0)
}()
}
func (c *MemoryJobCache) Get(id string) (*Job, error) {
c.jobs.Lock.RLock()
defer c.jobs.Lock.RUnlock()
j := c.jobs.Jobs[id]
if j != nil {
return j, nil
}
j, err := c.jobDB.Get(id)
if err != nil || j == nil {
return nil, ErrJobDoesntExist
}
return j, nil
}
func (c *MemoryJobCache) GetAll() *JobsMap {
return c.jobs
}
func (c *MemoryJobCache) Set(j *Job) error {
c.jobs.Lock.Lock()
defer c.jobs.Lock.Unlock()
if j == nil {
return nil
}
if err := c.jobDB.Save(j); err != nil {
return err
}
c.jobs.Jobs[j.Id] = j
return nil
}
func (c *MemoryJobCache) Delete(id string) error {
c.jobs.Lock.Lock()
defer c.jobs.Lock.Unlock()
j := c.jobs.Jobs[id]
if j == nil {
return ErrJobDoesntExist
}
j.lock.Lock()
defer j.lock.Unlock()
err := c.jobDB.Delete(id)
if err != nil {
return fmt.Errorf("Error occurred while trying to delete job from db: %s", err)
}
j.lock.Unlock()
j.StopTimer()
j.lock.Lock()
go func() {
log.Errorln(j.DeleteFromParentJobs(c)) // todo: review
}()
// Remove itself from dependent jobs as a parent job
// and possibly delete child jobs if they don't have any other parents.
go func() {
log.Errorln(j.DeleteFromDependentJobs(c)) // todo: review
}()
delete(c.jobs.Jobs, id)
return err
}
func (c *MemoryJobCache) Enable(j *Job) error {
return enable(j, c)
}
// Disable stops a job from running by stopping its jobTimer. It also sets Job.Disabled to true,
// which is reflected in the UI.
func (c *MemoryJobCache) Disable(j *Job) error {
return disable(j, c)
}
func (c *MemoryJobCache) SaveRun(run *JobStat) error {
err := c.jobDB.SaveRun(run)
return err
}
func (c *MemoryJobCache) GetAllRuns(jobID string) ([]*JobStat, error) {
return c.jobDB.GetAllRuns(jobID)
}
func (c *MemoryJobCache) GetRun(runID string) (*JobStat, error) {
return c.jobDB.GetRun(runID)
}
func (c *MemoryJobCache) UpdateRun(run *JobStat) error {
return c.jobDB.UpdateRun(run)
}
func (c *MemoryJobCache) DeleteRun(runId string) error {
return c.jobDB.DeleteRun(runId)
}
func (c *MemoryJobCache) ClearExpiredRuns() error {
return c.jobDB.ClearExpiredRuns()
}
func (c *MemoryJobCache) Persist() error {
c.jobs.Lock.RLock()
defer c.jobs.Lock.RUnlock()
for _, j := range c.jobs.Jobs {
err := c.jobDB.Save(j)
if err != nil {
return err
}
}
return nil
}
type LockFreeJobCache struct {
jobs *hashmap.HashMap
jobDB JobDB
retentionPeriod time.Duration
Clock
}
func NewLockFreeJobCache(jobDB JobDB) *LockFreeJobCache {
return &LockFreeJobCache{
jobs: hashmap.New(8), //nolint:gomnd
jobDB: jobDB,
}
}
func (c *LockFreeJobCache) Start(jobstatTtl time.Duration) {
// Prep cache
allJobs, err := c.jobDB.GetAll()
if err != nil {
log.Fatal(err)
}
for _, j := range allJobs {
if j.Schedule == "" {
log.Infof("Job %s:%s skipped.", j.Name, j.Id)
continue
}
if j.ShouldStartWaiting() {
j.StartWaiting(c, false)
}
log.Infof("Job %s:%s added to cache.", j.Name, j.Id)
err := c.Set(j)
if err != nil {
log.Errorln(err)
}
}
// Run retention every minute to clean up old job stats entries
if jobstatTtl > 0 {
c.retentionPeriod = jobstatTtl
go c.clearJobStats(1 * time.Minute)
}
// Process-level defer for shutting down the db.
ch := make(chan os.Signal)
signal.Notify(ch, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT)
go func() {
s := <-ch
log.Infof("Process got signal: %s", s)
log.Infof("Shutting down....")
// Persist all jobs to database
log.Errorln(c.Persist())
// Close the database
c.jobDB.Close()
os.Exit(0)
}()
}
func (c *LockFreeJobCache) Get(id string) (*Job, error) {
val, exists := c.jobs.GetStringKey(id)
if val == nil || !exists {
j, err := c.jobDB.Get(id)
if err != nil || j == nil {
return nil, ErrJobDoesntExist
}
return j, nil
}
j := val.(*Job)
if j == nil {
return nil, ErrJobDoesntExist
}
return j, nil
}
func (c *LockFreeJobCache) GetAll() *JobsMap {
jm := NewJobsMap()
for el := range c.jobs.Iter() {
jm.Jobs[el.Key.(string)] = el.Value.(*Job)
}
return jm
}
func (c *LockFreeJobCache) Set(j *Job) error {
if j == nil {
return nil
}
if err := c.jobDB.Save(j); err != nil {
return err
}
c.jobs.Set(j.Id, j)
return nil
}
func (c *LockFreeJobCache) Delete(id string) error {
j, err := c.Get(id)
if err != nil {
return ErrJobDoesntExist
}
j.lock.Lock()
defer j.lock.Unlock()
err = c.jobDB.Delete(id)
if err != nil {
return fmt.Errorf("Error occurred while trying to delete job from db: %s", err)
}
j.lock.Unlock()
j.StopTimer()
j.lock.Lock()
go func() {
log.Errorln(j.DeleteFromParentJobs(c)) // todo: review
}()
// Remove itself from dependent jobs as a parent job
// and possibly delete child jobs if they don't have any other parents.
go func() {
log.Errorln(j.DeleteFromDependentJobs(c)) // todo: review
}()
log.Infof("Deleting %s", id)
c.jobs.Del(id)
return err
}
func (c *LockFreeJobCache) Enable(j *Job) error {
return enable(j, c)
}
// Disable stops a job from running by stopping its jobTimer. It also sets Job.Disabled to true,
// which is reflected in the UI.
func (c *LockFreeJobCache) Disable(j *Job) error {
return disable(j, c)
}
func (c *LockFreeJobCache) SaveRun(run *JobStat) error {
err := c.jobDB.SaveRun(run)
return err
}
func (c *LockFreeJobCache) GetAllRuns(jobID string) ([]*JobStat, error) {
return c.jobDB.GetAllRuns(jobID)
}
func (c *LockFreeJobCache) GetRun(runID string) (*JobStat, error) {
return c.jobDB.GetRun(runID)
}
func (c *LockFreeJobCache) UpdateRun(run *JobStat) error {
return c.jobDB.UpdateRun(run)
}
func (c *LockFreeJobCache) DeleteRun(runId string) error {
return c.jobDB.DeleteRun(runId)
}
func (c *LockFreeJobCache) ClearExpiredRuns() error {
return c.jobDB.ClearExpiredRuns()
}
func (c *LockFreeJobCache) Persist() error {
jm := c.GetAll()
for _, j := range jm.Jobs {
j.lock.RLock()
err := c.jobDB.Save(j)
if err != nil {
j.lock.RUnlock()
return err
}
j.lock.RUnlock()
}
return nil
}
func (c *LockFreeJobCache) clearJobStats(retentionWaitTime time.Duration) {
wait := time.NewTicker(retentionWaitTime).C
var err error
for {
<-wait
err = c.jobDB.ClearExpiredRuns()
if err != nil {
log.Errorf("Error occurred during invoking retention. Err: %s", err)
}
}
}