MangoPig
119 lines
2.4 KiB
Go
119 lines
2.4 KiB
Go
package worker
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import (
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"context"
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"fmt"
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"log/slog"
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"strings"
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"time"
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"moku-backend/internal/jobs"
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)
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type JobStore interface {
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ClaimNext(ctx context.Context) (*jobs.Job, error)
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MarkSucceeded(ctx context.Context, jobID string) error
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MarkFailed(ctx context.Context, jobID, failure string) error
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}
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type Handler func(ctx context.Context, job jobs.Job) error
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type Runner struct {
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store JobStore
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logger *slog.Logger
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pollInterval time.Duration
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handlers map[string]Handler
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}
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func NewRunner(store JobStore, logger *slog.Logger, pollInterval time.Duration) *Runner {
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interval := pollInterval
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if interval <= 0 {
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interval = time.Second
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}
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return &Runner{
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store: store,
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logger: logger,
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pollInterval: interval,
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handlers: make(map[string]Handler),
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}
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}
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func (runner *Runner) Register(kind string, handler Handler) {
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runner.handlers[strings.TrimSpace(kind)] = handler
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}
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func (runner *Runner) Run(ctx context.Context) error {
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for {
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select {
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case <-ctx.Done():
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return nil
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default:
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}
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job, err := runner.store.ClaimNext(ctx)
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if err != nil {
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if ctx.Err() != nil {
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return nil
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}
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return err
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}
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if job == nil {
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if err := waitForNextPoll(ctx, runner.pollInterval); err != nil {
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return nil
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}
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continue
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}
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handler, ok := runner.handlers[job.Kind]
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if !ok {
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failure := fmt.Sprintf("no handler registered for job kind %q", job.Kind)
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if err := runner.store.MarkFailed(ctx, job.ID, failure); err != nil {
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return err
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}
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runner.logger.Error("worker job failed", "jobID", job.ID, "kind", job.Kind, "error", failure)
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continue
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}
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if err := handler(ctx, *job); err != nil {
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if ctx.Err() != nil {
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return nil
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}
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failure := strings.TrimSpace(err.Error())
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if failure == "" {
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failure = "job handler returned an empty error"
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}
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if markErr := runner.store.MarkFailed(ctx, job.ID, failure); markErr != nil {
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return markErr
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}
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runner.logger.Error("worker job failed", "jobID", job.ID, "kind", job.Kind, "error", failure)
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continue
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}
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if err := runner.store.MarkSucceeded(ctx, job.ID); err != nil {
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return err
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}
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runner.logger.Info("worker job succeeded", "jobID", job.ID, "kind", job.Kind)
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}
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}
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func waitForNextPoll(ctx context.Context, interval time.Duration) error {
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timer := time.NewTimer(interval)
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defer timer.Stop()
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select {
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case <-ctx.Done():
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return ctx.Err()
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case <-timer.C:
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return nil
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}
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}
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