106 lines
2.1 KiB
Go
106 lines
2.1 KiB
Go
package main
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import (
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"context"
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"flag"
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"log"
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"os"
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"os/signal"
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"sync"
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"syscall"
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"time"
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)
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var logger = log.New(os.Stderr, "", log.Ltime|log.Lshortfile)
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func main() {
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cfgPath := flag.String("c", "/srv/energy/collector/config.json", "path to config file")
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flag.Parse()
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cfg, err := loadConfig(*cfgPath)
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if err != nil {
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log.Fatalf("config: %v", err)
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}
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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db, err := NewDB(ctx, cfg.DB.DSN)
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if err != nil {
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log.Fatalf("db: %v", err)
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}
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defer db.Close()
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alpha, err := NewAlphaEss(cfg.AlphaEss)
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if err != nil {
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log.Fatalf("alphaess: %v", err)
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}
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defer alpha.Close()
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meters, err := NewMeterPoller(cfg.MQTT)
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if err != nil {
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log.Fatalf("meters: %v", err)
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}
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defer meters.Close()
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interval := time.Duration(cfg.SampleRate) * time.Second
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go runPollLoop(ctx, alpha, meters, db, interval)
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sig := make(chan os.Signal, 1)
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signal.Notify(sig, syscall.SIGINT, syscall.SIGTERM)
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<-sig
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logger.Println("shutting down")
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}
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func runPollLoop(ctx context.Context, alpha *AlphaEss, meters *MeterPoller, db *DB, interval time.Duration) {
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ticker := time.NewTicker(interval)
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defer ticker.Stop()
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for {
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select {
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case <-ctx.Done():
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return
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case <-ticker.C:
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poll(ctx, alpha, meters, db)
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}
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}
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}
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func poll(ctx context.Context, alpha *AlphaEss, meters *MeterPoller, db *DB) {
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t := time.Now()
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// Poll AlphaEss and all SDM630 meters in parallel.
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var (
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inverterData *InverterData
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meterData []MeterReading
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wg sync.WaitGroup
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)
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wg.Add(2)
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go func() {
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defer wg.Done()
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d, err := alpha.Poll()
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if err != nil {
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logger.Printf("alphaess: %v", err)
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return
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}
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inverterData = d
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}()
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go func() {
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defer wg.Done()
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meterData = meters.PollAll()
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}()
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wg.Wait()
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// Write everything with the same timestamp t.
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if inverterData != nil {
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if err := db.WriteInverter(ctx, t, inverterData); err != nil {
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logger.Printf("write inverter: %v", err)
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}
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}
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for _, r := range meterData {
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if err := db.WriteMeter(ctx, t, r); err != nil {
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logger.Printf("write meter %s: %v", r.Device, err)
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}
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}
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}
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