actions-runner/poller/poller.go

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package poller
import (
"context"
"time"
"gitea.com/gitea/act_runner/client"
runnerv1 "gitea.com/gitea/proto-go/runner/v1"
log "github.com/sirupsen/logrus"
)
func New(cli client.Client, dispatch func(context.Context, *runnerv1.Stage) error, filter *client.Filter) *Poller {
return &Poller{
Client: cli,
Filter: filter,
Dispatch: dispatch,
routineGroup: newRoutineGroup(),
}
}
type Poller struct {
Client client.Client
Filter *client.Filter
Dispatch func(context.Context, *runnerv1.Stage) error
routineGroup *routineGroup
}
func (p *Poller) Poll(ctx context.Context, n int) error {
// register new runner.
_, err := p.Client.Register(ctx, &runnerv1.RegisterRequest{
Os: p.Filter.OS,
Arch: p.Filter.Arch,
Capacity: int64(p.Filter.Capacity),
})
if err != nil {
log.WithError(err).Error("poller: cannot register new runner")
return err
}
for i := 0; i < n; i++ {
func(i int) {
p.routineGroup.Run(func() {
for {
select {
case <-ctx.Done():
log.Infof("stopped the runner: %d", i+1)
return
default:
if ctx.Err() != nil {
log.Infof("stopping the runner: %d", i+1)
return
}
if err := p.poll(ctx, i+1); err != nil {
log.WithField("thread", i+1).
WithError(err).Error("poll error")
}
}
}
})
}(i)
}
p.routineGroup.Wait()
return nil
}
func (p *Poller) poll(ctx context.Context, thread int) error {
logger := log.WithField("thread", thread)
logger.Info("poller: request stage from remote server")
ctx, cancel := context.WithTimeout(ctx, 30*time.Second)
defer cancel()
// request a new build stage for execution from the central
// build server.
stage, err := p.Client.Request(ctx, &runnerv1.RequestRequest{
Kind: p.Filter.Kind,
Os: p.Filter.OS,
Arch: p.Filter.Arch,
Type: p.Filter.Type,
})
if err == context.Canceled || err == context.DeadlineExceeded {
logger.WithError(err).Trace("poller: no stage returned")
return nil
}
if err != nil {
return err
}
// exit if a nil or empty stage is returned from the system
// and allow the runner to retry.
if stage == nil || stage.Id == 0 {
return nil
}
return p.Dispatch(ctx, stage)
}