112 lines
2.6 KiB
Go
112 lines
2.6 KiB
Go
// Copyright 2023 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package poll
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import (
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"context"
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"errors"
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"fmt"
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"sync"
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"sync/atomic"
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runnerv1 "code.gitea.io/actions-proto-go/runner/v1"
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"connectrpc.com/connect"
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log "github.com/sirupsen/logrus"
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"golang.org/x/time/rate"
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"gitea.com/gitea/act_runner/internal/app/run"
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"gitea.com/gitea/act_runner/internal/pkg/client"
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"gitea.com/gitea/act_runner/internal/pkg/config"
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)
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type Poller struct {
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client client.Client
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runner *run.Runner
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cfg *config.Config
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tasksVersion atomic.Int64 // tasksVersion used to store the version of the last task fetched from the Gitea.
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}
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func New(cfg *config.Config, client client.Client, runner *run.Runner) *Poller {
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return &Poller{
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client: client,
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runner: runner,
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cfg: cfg,
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}
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}
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func (p *Poller) Poll(ctx context.Context) {
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limiter := rate.NewLimiter(rate.Every(p.cfg.Runner.FetchInterval), 1)
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wg := &sync.WaitGroup{}
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for i := 0; i < p.cfg.Runner.Capacity; i++ {
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wg.Add(1)
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go p.poll(ctx, wg, limiter)
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}
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wg.Wait()
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}
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func (p *Poller) poll(ctx context.Context, wg *sync.WaitGroup, limiter *rate.Limiter) {
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defer wg.Done()
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for {
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if err := limiter.Wait(ctx); err != nil {
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if ctx.Err() != nil {
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log.WithError(err).Debug("limiter wait failed")
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}
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return
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}
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task, ok := p.fetchTask(ctx)
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if !ok {
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continue
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}
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p.runTaskWithRecover(ctx, task)
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}
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}
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func (p *Poller) runTaskWithRecover(ctx context.Context, task *runnerv1.Task) {
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defer func() {
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if r := recover(); r != nil {
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err := fmt.Errorf("panic: %v", r)
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log.WithError(err).Error("panic in runTaskWithRecover")
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}
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}()
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if err := p.runner.Run(ctx, task); err != nil {
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log.WithError(err).Error("failed to run task")
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}
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}
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func (p *Poller) fetchTask(ctx context.Context) (*runnerv1.Task, bool) {
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reqCtx, cancel := context.WithTimeout(ctx, p.cfg.Runner.FetchTimeout)
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defer cancel()
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// Load the version value that was in the cache when the request was sent.
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v := p.tasksVersion.Load()
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resp, err := p.client.FetchTask(reqCtx, connect.NewRequest(&runnerv1.FetchTaskRequest{
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TasksVersion: v,
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}))
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if errors.Is(err, context.DeadlineExceeded) {
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err = nil
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}
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if err != nil {
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log.WithError(err).Error("failed to fetch task")
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return nil, false
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}
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if resp == nil || resp.Msg == nil {
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return nil, false
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}
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if resp.Msg.TasksVersion > v {
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p.tasksVersion.CompareAndSwap(v, resp.Msg.TasksVersion)
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}
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if resp.Msg.Task == nil {
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return nil, false
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}
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// got a task, set `tasksVersion` to zero to focre query db in next request.
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p.tasksVersion.CompareAndSwap(resp.Msg.TasksVersion, 0)
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return resp.Msg.Task, true
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}
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