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|
package poller
import (
"context"
"errors"
"sync"
"time"
runnerv1 "code.gitea.io/actions-proto-go/runner/v1"
"gitea.com/gitea/act_runner/client"
"github.com/bufbuild/connect-go"
log "github.com/sirupsen/logrus"
)
var ErrDataLock = errors.New("Data Lock Error")
func New(cli client.Client, dispatch func(context.Context, *runnerv1.Task) error, workerNum int) *Poller {
return &Poller{
Client: cli,
Dispatch: dispatch,
routineGroup: newRoutineGroup(),
metric: &metric{},
workerNum: workerNum,
ready: make(chan struct{}, 1),
}
}
type Poller struct {
Client client.Client
Dispatch func(context.Context, *runnerv1.Task) error
sync.Mutex
routineGroup *routineGroup
metric *metric
ready chan struct{}
workerNum int
}
func (p *Poller) schedule() {
p.Lock()
defer p.Unlock()
if int(p.metric.BusyWorkers()) >= p.workerNum {
return
}
select {
case p.ready <- struct{}{}:
default:
}
}
func (p *Poller) Wait() {
p.routineGroup.Wait()
}
func (p *Poller) Poll(ctx context.Context) error {
l := log.WithField("func", "Poll")
for {
// check worker number
p.schedule()
select {
// wait worker ready
case <-p.ready:
case <-ctx.Done():
return nil
}
LOOP:
for {
select {
case <-ctx.Done():
break LOOP
default:
task, err := p.pollTask(ctx)
if task == nil || err != nil {
if err != nil {
l.Errorf("can't find the task: %v", err.Error())
}
time.Sleep(5 * time.Second)
break
}
p.metric.IncBusyWorker()
p.routineGroup.Run(func() {
defer p.schedule()
defer p.metric.DecBusyWorker()
if err := p.dispatchTask(ctx, task); err != nil {
l.Errorf("execute task: %v", err.Error())
}
})
break LOOP
}
}
}
}
func (p *Poller) pollTask(ctx context.Context) (*runnerv1.Task, error) {
l := log.WithField("func", "pollTask")
l.Info("poller: request stage from remote server")
reqCtx, cancel := context.WithTimeout(ctx, 5*time.Second)
defer cancel()
// request a new build stage for execution from the central
// build server.
resp, err := p.Client.FetchTask(reqCtx, connect.NewRequest(&runnerv1.FetchTaskRequest{}))
if err == context.Canceled || err == context.DeadlineExceeded {
l.WithError(err).Trace("poller: no stage returned")
return nil, nil
}
if err != nil && err == ErrDataLock {
l.WithError(err).Info("task accepted by another runner")
return nil, nil
}
if err != nil {
l.WithError(err).Error("cannot accept task")
return nil, err
}
// exit if a nil or empty stage is returned from the system
// and allow the runner to retry.
if resp.Msg.Task == nil || resp.Msg.Task.Id == 0 {
return nil, nil
}
return resp.Msg.Task, nil
}
func (p *Poller) dispatchTask(ctx context.Context, task *runnerv1.Task) error {
l := log.WithField("func", "dispatchTask")
defer func() {
e := recover()
if e != nil {
l.Errorf("panic error: %v", e)
}
}()
runCtx, cancel := context.WithTimeout(ctx, time.Hour)
defer cancel()
return p.Dispatch(runCtx, task)
}
|
