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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| package testcomponents | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "sync" | ||
| "time" | ||
|
|
||
| "github.com/go-kit/log" | ||
| "github.com/grafana/alloy/internal/component" | ||
| "github.com/grafana/alloy/internal/featuregate" | ||
| "github.com/grafana/alloy/internal/runtime/logging/level" | ||
| ) | ||
|
|
||
| func init() { | ||
| component.Register(component.Registration{ | ||
| Name: "testcomponents.pulse", | ||
| Stability: featuregate.StabilityPublicPreview, | ||
| Args: PulseConfig{}, | ||
|
|
||
| Build: func(opts component.Options, args component.Arguments) (component.Component, error) { | ||
| return NewPulse(opts, args.(PulseConfig)) | ||
| }, | ||
| }) | ||
| } | ||
|
|
||
| type PulseConfig struct { | ||
| Frequency time.Duration `alloy:"frequency,attr"` | ||
| Max int `alloy:"max,attr"` | ||
| ForwardTo []IntReceiver `alloy:"forward_to,attr,optional"` | ||
| } | ||
|
|
||
| type Pulse struct { | ||
| opts component.Options | ||
| log log.Logger | ||
|
|
||
| cfgMut sync.Mutex | ||
| cfg PulseConfig | ||
| count int | ||
| } | ||
|
|
||
| func NewPulse(o component.Options, cfg PulseConfig) (*Pulse, error) { | ||
| t := &Pulse{opts: o, log: o.Logger} | ||
| if err := t.Update(cfg); err != nil { | ||
| return nil, err | ||
| } | ||
| return t, nil | ||
| } | ||
|
|
||
| var ( | ||
| _ component.Component = (*Pulse)(nil) | ||
| ) | ||
|
|
||
| func (p *Pulse) Run(ctx context.Context) error { | ||
| for { | ||
| select { | ||
| case <-ctx.Done(): | ||
| return nil | ||
| case <-time.After(p.getNextPulse()): | ||
| p.cfgMut.Lock() | ||
| if p.cfg.Max == 0 || p.count < p.cfg.Max { | ||
| for _, r := range p.cfg.ForwardTo { | ||
| r.ReceiveInt(1) | ||
| } | ||
| p.count++ | ||
| } | ||
| p.cfgMut.Unlock() | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func (t *Pulse) getNextPulse() time.Duration { | ||
| t.cfgMut.Lock() | ||
| defer t.cfgMut.Unlock() | ||
| return t.cfg.Frequency | ||
| } | ||
|
|
||
| // Update implements Component. | ||
| func (t *Pulse) Update(args component.Arguments) error { | ||
| t.cfgMut.Lock() | ||
| defer t.cfgMut.Unlock() | ||
|
|
||
| cfg := args.(PulseConfig) | ||
| if cfg.Frequency == 0 { | ||
| return fmt.Errorf("frequency must not be 0") | ||
| } | ||
|
|
||
| level.Info(t.log).Log("msg", "setting count frequency", "freq", cfg.Frequency) | ||
| t.cfg = cfg | ||
| return nil | ||
| } |
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