How to use this package
Make sure nats is running. Both publisher and subscriber are open
// NATS streaming server
m.natsServer = nats.NewServer(nats.Config{FilestoreDir: m.natsPath})
if err := m.natsServer.Open(); err != nil {
m.logger.Error("Failed to start nats streaming server", zap.Error(err))
return err
}
publisher := nats.NewAsyncPublisher("nats-publisher")
if err := publisher.Open(); err != nil {
m.logger.Error("Failed to connect to streaming server", zap.Error(err))
return err
}
subscriber := nats.NewQueueSubscriber("nats-subscriber")
if err := subscriber.Open(); err != nil {
m.logger.Error("Failed to connect to streaming server", zap.Error(err))
return err
}
Make sure the scraperTargetStorageService is accessible
scraperTargetSvc influxdb.ScraperTargetStoreService = m.boltClient
Setup recorder, Make sure subscriber subscribes use the correct recorder with the correct write service
recorder := gather.PlatformWriter{
Timeout: time.Millisecond * 30,
Writer: writer,
}
subscriber.Subscribe(MetricsSubject, "", &RecorderHandler{
Logger: logger,
Recorder: recorder,
})
Start the scheduler
scraperScheduler, err := gather.NewScheduler(10, m.logger, scraperTargetSvc, publisher, subscriber, 0, 0)
if err != nil {
m.logger.Error("Failed to create scraper subscriber", zap.Error(err))
return err
}
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