func (s *DiskvSpooler) Start(sz Serializer) error {
s.status.Update("data-spooler", "Starting")
// Create the data dir if necessary. Normally the manager does this,
// but it's necessary to create it here for testing.
if err := pct.MakeDir(s.dataDir); err != nil {
return err
}
// Create basedir/trash/data/ for Reject().
s.trashDataDir = path.Join(s.trashDir, "data")
if err := pct.MakeDir(s.trashDataDir); err != nil {
return err
}
// T{} -> []byte
s.sz = sz
// diskv reads all files in BasePath on startup.
s.cache = diskv.New(diskv.Options{
BasePath: s.dataDir,
Transform: func(s string) []string { return []string{} },
CacheSizeMax: DEFAULT_DATA_MAX_SIZE,
Index: &diskv.LLRBIndex{},
IndexLess: func(a, b string) bool { return a < b },
})
s.mux.Lock()
s.updateStats()
s.mux.Unlock()
go s.run()
s.logger.Info("Started")
return nil
}
func (m *Manager) Start() error {
m.mux.Lock()
defer m.mux.Unlock()
if m.config != nil {
return pct.ServiceIsRunningError{Service: "data"}
}
m.status.Update("data", "Starting")
// Load config from disk (optional, but should exist).
config := &Config{}
if err := pct.Basedir.ReadConfig("data", config); err != nil {
if !os.IsNotExist(err) {
return err
}
}
if err := m.validateConfig(config); err != nil {
return err
}
// Make data and trash dirs used/shared by all services (mm, qan, etc.).
if err := pct.MakeDir(m.dataDir); err != nil {
return err
}
if err := pct.MakeDir(m.trashDir); err != nil {
return err
}
// Make data serializer/encoder, e.g. T{} -> gzip -> []byte.
sz, err := makeSerializer(config.Encoding)
if err != nil {
return err
}
// Make persistent (disk-back) key-value cache and start data spooler.
m.status.Update("data", "Starting spooler")
spooler := NewDiskvSpooler(
pct.NewLogger(m.logger.LogChan(), "data-spooler"),
m.dataDir,
m.trashDir,
m.hostname,
config.Limits,
)
if err := spooler.Start(sz); err != nil {
return err
}
m.spooler = spooler
// Start data sender.
m.status.Update("data", "Starting sender")
sender := NewSender(
pct.NewLogger(m.logger.LogChan(), "data-sender"),
m.client,
)
if err := sender.Start(m.spooler, time.Tick(time.Duration(config.SendInterval)*time.Second), config.SendInterval, config.Blackhole); err != nil {
return err
}
m.sender = sender
m.config = config
m.running = true
m.logger.Info("Started")
m.status.Update("data", "Running")
return nil
}