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package clusterprovider
import (
"encoding/json"
"errors"
"os"
"path/filepath"
"time"
"github.com/johnandersen777/socialweb-computer-kcp/internal/kit/fsx"
)
const (
RollerStatusFile = "roller-status.json"
RollObservedSuffix = ".observed.json"
DefaultRollObserveBound = 30 * time.Second
RollStateWaiting = "waiting"
RollStateStarted = "started"
)
type RollerStatus struct {
Provider string `json:"provider"`
PID int `json:"pid"`
PassAt time.Time `json:"passAt"`
Clusters []string `json:"clusters,omitempty"`
Error string `json:"error,omitempty"`
LastError string `json:"lastError,omitempty"`
LastErrorAt time.Time `json:"lastErrorAt,omitzero"`
}
type RollObserved struct {
ID string `json:"id"`
Provider string `json:"provider"`
FirstAt time.Time `json:"firstAt"`
ObservedAt time.Time `json:"observedAt"`
State string `json:"state"`
Error string `json:"error,omitempty"`
}
func RollerStatusPath(stateDir string) string { return filepath.Join(stateDir, RollerStatusFile) }
func RollObservedPath(stateDir, cluster, id string) (string, error) {
dir, err := ClusterDataDir(stateDir, cluster)
if err != nil {
return "", err
}
return filepath.Join(dir, RollsDirName, id+RollObservedSuffix), nil
}
func readJSONFile(path string, v any) (bool, error) {
b, err := os.ReadFile(path)
if errors.Is(err, os.ErrNotExist) {
return false, nil
}
if err != nil {
return false, err
}
return true, json.Unmarshal(b, v)
}
func ReadRollerStatus(stateDir string) (RollerStatus, bool, error) {
var s RollerStatus
ok, err := readJSONFile(RollerStatusPath(stateDir), &s)
return s, ok, err
}
func ReadRollObserved(stateDir, cluster, id string) (RollObserved, bool, error) {
var o RollObserved
p, err := RollObservedPath(stateDir, cluster, id)
if err != nil {
return o, false, err
}
ok, err := readJSONFile(p, &o)
return o, ok, err
}
func (r *Roller) noteStatus(clusters []string, err error) {
now := time.Now().UTC()
r.status.Provider, r.status.PID, r.status.PassAt, r.status.Clusters = r.Name, os.Getpid(), now, clusters
r.status.Error = ""
if err != nil {
r.status.Error, r.status.LastError, r.status.LastErrorAt = err.Error(), err.Error(), now
}
if werr := fsx.WriteJSON(RollerStatusPath(r.Stack.StateDir), r.status, 0o600); werr != nil {
r.log().Warn("cluster provider: writing the roller status", "err", werr.Error())
}
}
func (r *Roller) noteObserved(key string, req RollRequest, state string, err error) {
p, perr := RollObservedPath(r.Stack.StateDir, key, req.ID)
if perr != nil {
return
}
now := time.Now().UTC()
o := RollObserved{ID: req.ID, Provider: r.Name, FirstAt: now, ObservedAt: now, State: state}
var prev RollObserved
if ok, _ := readJSONFile(p, &prev); ok && !prev.FirstAt.IsZero() {
o.FirstAt = prev.FirstAt
}
if err != nil {
o.Error = err.Error()
}
if werr := fsx.WriteJSON(p, o, 0o600); werr != nil {
r.log().Warn("cluster provider: writing the roll observation", "cluster", key, "roll", req.ID, "err", werr.Error())
}
}
