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|
package worker
import (
"context"
"errors"
"log/slog"
"time"
"golang.org/x/sync/errgroup"
)
type (
Task interface {
Start(context.Context) error
}
Work struct {
Name string
Task Task
wait time.Duration
}
TaskPool struct {
tasks []*Work
}
)
const (
format = "2006.01.02 15:04:05"
)
func NewTaskPool() *TaskPool {
return &TaskPool{}
}
func (w *Work) run(ctx context.Context) error {
// first time fire from the get go
timer := time.NewTimer(time.Nanosecond)
for {
select {
case <-ctx.Done():
return ctx.Err()
case <-timer.C:
if err := w.Task.Start(ctx); err != nil && !errors.Is(err, context.Canceled) {
return err
}
}
timer.Reset(w.wait)
}
}
func (self *TaskPool) AddTask(name string, wait time.Duration, task Task) {
self.tasks = append(self.tasks, &Work{
Name: name,
Task: task,
wait: wait,
})
}
func (self *TaskPool) Start(ctx context.Context) error {
var g errgroup.Group
for _, w := range self.tasks {
g.Go(func(w *Work) func() error {
return func() error {
slog.Info("Process starting", "time", time.Now().Format(format), "name", w.Name)
now := time.Now()
if err := w.run(ctx); err != nil && !errors.Is(context.Canceled, err) {
since := time.Since(now)
slog.Error(
"Process erred",
"time", time.Now().Format(format),
"name", w.Name,
"error", err,
"duration", since,
)
return err
} else {
since := time.Since(now)
slog.Info(
"Process ended",
"time", time.Now().Format(format),
"name", w.Name,
"duration", since,
)
}
return nil
}
}(w))
}
return g.Wait()
}
|
