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ticker.go
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ticker.go
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package ticker
import (
"context"
"fmt"
"os"
"sync"
"time"
"github.com/go-co-op/gocron"
"github.com/google/uuid"
"github.com/hatchet-dev/hatchet/internal/datautils"
"github.com/hatchet-dev/hatchet/internal/repository"
"github.com/hatchet-dev/hatchet/internal/services/shared/tasktypes"
"github.com/hatchet-dev/hatchet/internal/taskqueue"
"github.com/rs/zerolog"
)
type Ticker interface {
Start(ctx context.Context) error
}
type TickerImpl struct {
tq taskqueue.TaskQueue
l *zerolog.Logger
repo repository.Repository
s *gocron.Scheduler
crons sync.Map
jobRuns sync.Map
stepRuns sync.Map
stepRunRequeues sync.Map
dv datautils.DataDecoderValidator
tickerId string
}
type timeoutCtx struct {
ctx context.Context
cancel context.CancelFunc
}
type TickerOpt func(*TickerOpts)
type TickerOpts struct {
tq taskqueue.TaskQueue
l *zerolog.Logger
repo repository.Repository
tickerId string
dv datautils.DataDecoderValidator
}
func defaultTickerOpts() *TickerOpts {
logger := zerolog.New(os.Stderr)
return &TickerOpts{
l: &logger,
tickerId: uuid.New().String(),
dv: datautils.NewDataDecoderValidator(),
}
}
func WithTaskQueue(tq taskqueue.TaskQueue) TickerOpt {
return func(opts *TickerOpts) {
opts.tq = tq
}
}
func WithRepository(r repository.Repository) TickerOpt {
return func(opts *TickerOpts) {
opts.repo = r
}
}
func WithLogger(l *zerolog.Logger) TickerOpt {
return func(opts *TickerOpts) {
opts.l = l
}
}
func New(fs ...TickerOpt) (*TickerImpl, error) {
opts := defaultTickerOpts()
for _, f := range fs {
f(opts)
}
if opts.tq == nil {
return nil, fmt.Errorf("task queue is required. use WithTaskQueue")
}
if opts.repo == nil {
return nil, fmt.Errorf("repository is required. use WithRepository")
}
s := gocron.NewScheduler(time.UTC)
return &TickerImpl{
tq: opts.tq,
l: opts.l,
repo: opts.repo,
s: s,
dv: opts.dv,
tickerId: opts.tickerId,
}, nil
}
func (t *TickerImpl) Start(ctx context.Context) error {
t.l.Debug().Msg("starting ticker")
// register the ticker
ticker, err := t.repo.Ticker().CreateNewTicker(&repository.CreateTickerOpts{
ID: t.tickerId,
})
if err != nil {
return err
}
// subscribe to a task queue with the dispatcher id
taskChan, err := t.tq.Subscribe(ctx, taskqueue.QueueTypeFromTicker(ticker))
if err != nil {
return err
}
_, err = t.s.Every(5).Seconds().Do(t.runStepRunRequeue(ctx))
if err != nil {
return fmt.Errorf("could not schedule step run requeue: %w", err)
}
_, err = t.s.Every(5).Seconds().Do(t.runUpdateHeartbeat(ctx))
if err != nil {
return fmt.Errorf("could not schedule heartbeat update: %w", err)
}
t.s.StartAsync()
for {
select {
case <-ctx.Done():
t.l.Debug().Msg("removing ticker")
// delete the ticker
err = t.repo.Ticker().Delete(t.tickerId)
if err != nil {
t.l.Err(err).Msg("could not delete ticker")
return err
}
// add the task after the ticker is deleted
err := t.tq.AddTask(
ctx,
taskqueue.JOB_PROCESSING_QUEUE,
tickerRemoved(t.tickerId),
)
if err != nil {
t.l.Err(err).Msg("could not add ticker removed task")
return err
}
// return err
return nil
case task := <-taskChan:
err = t.handleTask(ctx, task)
if err != nil {
t.l.Error().Err(err).Msgf("could not handle event task %s", task.ID)
}
}
}
}
func (t *TickerImpl) handleTask(ctx context.Context, task *taskqueue.Task) error {
switch task.ID {
case "schedule-step-run-timeout":
return t.handleScheduleStepRunTimeout(ctx, task)
case "cancel-step-run-timeout":
return t.handleCancelStepRunTimeout(ctx, task)
case "schedule-job-run-timeout":
return t.handleScheduleJobRunTimeout(ctx, task)
case "cancel-job-run-timeout":
return t.handleCancelJobRunTimeout(ctx, task)
// case "schedule-step-requeue":
// return t.handleScheduleStepRunRequeue(ctx, task)
// case "cancel-step-requeue":
// return t.handleCancelStepRunRequeue(ctx, task)
case "schedule-cron":
return t.handleScheduleCron(ctx, task)
case "cancel-cron":
return t.handleCancelCron(ctx, task)
}
return fmt.Errorf("unknown task: %s in queue %s", task.ID, string(task.Queue))
}
func (t *TickerImpl) runStepRunRequeue(ctx context.Context) func() {
return func() {
t.l.Debug().Msgf("ticker: checking step run requeue")
// list all tenants
tenants, err := t.repo.Tenant().ListTenants()
if err != nil {
t.l.Err(err).Msg("could not list tenants")
return
}
for i := range tenants {
t.l.Debug().Msgf("adding step run requeue task for tenant %s", tenants[i].ID)
err := t.tq.AddTask(
ctx,
taskqueue.JOB_PROCESSING_QUEUE,
tasktypes.TenantToStepRunRequeueTask(tenants[i]),
)
if err != nil {
t.l.Err(err).Msg("could not add step run requeue task")
}
}
}
}
func (t *TickerImpl) runUpdateHeartbeat(ctx context.Context) func() {
return func() {
t.l.Debug().Msgf("ticker: updating heartbeat")
now := time.Now().UTC()
// update the heartbeat
_, err := t.repo.Ticker().UpdateTicker(t.tickerId, &repository.UpdateTickerOpts{
LastHeartbeatAt: &now,
})
if err != nil {
t.l.Err(err).Msg("could not update heartbeat")
}
}
}
func tickerRemoved(tickerId string) *taskqueue.Task {
payload, _ := datautils.ToJSONMap(tasktypes.RemoveTickerTaskPayload{
TickerId: tickerId,
})
metadata, _ := datautils.ToJSONMap(tasktypes.RemoveTickerTaskMetadata{})
return &taskqueue.Task{
ID: "ticker-removed",
Queue: taskqueue.JOB_PROCESSING_QUEUE,
Payload: payload,
Metadata: metadata,
}
}