package poller import ( "context" "errors" "time" "gitea.com/gitea/act_runner/client" runnerv1 "gitea.com/gitea/proto-go/runner/v1" "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, 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.Task) error routineGroup *routineGroup } func (p *Poller) Poll(ctx context.Context, n int) error { // register new runner. _, err := p.Client.Register(ctx, connect.NewRequest(&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 { l := log.WithField("thread", thread) l.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. resp, err := p.Client.FetchTask(ctx, connect.NewRequest(&runnerv1.FetchTaskRequest{ Kind: p.Filter.Kind, Os: p.Filter.OS, Arch: p.Filter.Arch, Type: p.Filter.Type, })) if err == context.Canceled || err == context.DeadlineExceeded { l.WithError(err).Trace("poller: no stage returned") return nil } if err != nil && err == ErrDataLock { l.WithError(err).Info("task accepted by another runner") return nil } if err != nil { l.WithError(err).Error("cannot accept task") return 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 } return p.Dispatch(ctx, resp.Msg.Task) }