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package roadrunner
import (
"os"
j "github.com/json-iterator/go"
"github.com/spiral/errors"
"github.com/spiral/goridge/v2"
)
var json = j.ConfigCompatibleWithStandardLibrary
type stopCommand struct {
Stop bool `json:"stop"`
}
type pidCommand struct {
Pid int `json:"pid"`
}
func sendControl(rl goridge.Relay, v interface{}) error {
const op = errors.Op("send control")
if data, ok := v.([]byte); ok {
err := rl.Send(data, goridge.PayloadControl|goridge.PayloadRaw)
if err != nil {
return errors.E(op, err)
}
return nil
}
data, err := json.Marshal(v)
if err != nil {
return errors.E(op, errors.Errorf("invalid payload: %s", err))
}
return rl.Send(data, goridge.PayloadControl)
}
func fetchPID(rl goridge.Relay) (int64, error) {
const op = errors.Op("fetchPID")
err := sendControl(rl, pidCommand{Pid: os.Getpid()})
if err != nil {
return 0, errors.E(op, err)
}
body, p, err := rl.Receive()
if err != nil {
return 0, errors.E(op, err)
}
if !p.HasFlag(goridge.PayloadControl) {
return 0, errors.E(op, errors.Str("unexpected response, header is missing"))
}
link := &pidCommand{}
err = json.Unmarshal(body, link)
if err != nil {
return 0, errors.E(op, err)
}
return int64(link.Pid), nil
}
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