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btrdbconn.go
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btrdbconn.go
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package main
import (
"context"
"fmt"
"math"
"strings"
"sync"
"time"
"github.com/pborman/uuid"
btrdb "gopkg.in/BTrDB/btrdb.v4"
)
type Inserter struct {
CollectionPrefix string
cachemu sync.Mutex
streamcache map[streamkey]*btrdb.Stream
db *btrdb.BTrDB
workq chan []*DataFrame
}
type streamkey struct {
Collection string
Name string
Unit string
}
func NewInserter(db *btrdb.BTrDB, prefix string) *Inserter {
prefix = strings.TrimSuffix(prefix, "/")
rv := Inserter{
CollectionPrefix: prefix,
streamcache: make(map[streamkey]*btrdb.Stream),
db: db,
workq: make(chan []*DataFrame),
}
go rv.worker()
return &rv
}
func (ins *Inserter) ProcessBatch(df map[uint16][]*DataFrame) {
for _, v := range df {
ins.workq <- v
}
}
func (ins *Inserter) mkc(d *PMUData) string {
return fmt.Sprintf("%s/%d_%s", ins.CollectionPrefix, d.IDCODE, d.STN)
}
func (ins *Inserter) worker() {
for {
buf := make(map[streamkey][]btrdb.RawPoint)
data := <-ins.workq
if len(data) == 0 {
continue
}
then := time.Now()
for _, d := range data {
ts := d.UTCUnixNanos
for _, pm := range d.Data {
skStats := streamkey{Name: "STAT",
Collection: ins.mkc(pm),
Unit: "STAT"}
buf[skStats] = append(buf[skStats],
btrdb.RawPoint{Time: ts, Value: float64(pm.STAT)})
if pm.STAT&0x8000 != 0 {
//STAT field says drop this data
continue
}
skTQ := streamkey{Name: "TIMEQUAL",
Collection: ins.mkc(pm),
Unit: "TQ"}
buf[skTQ] = append(buf[skTQ],
btrdb.RawPoint{Time: ts, Value: float64(d.TimeQual)})
skFreq := streamkey{Name: "FREQ",
Collection: ins.mkc(pm),
Unit: "Hz"}
buf[skFreq] = append(buf[skFreq],
btrdb.RawPoint{Time: ts, Value: pm.FREQ})
skDFreq := streamkey{Name: "DFREQ",
Collection: ins.mkc(pm),
Unit: "ROCOF"}
buf[skDFreq] = append(buf[skDFreq],
btrdb.RawPoint{Time: ts, Value: pm.DFREQ})
for phi, ph := range pm.PHASOR_NAMES {
unit := "Volt"
u := "VOL"
if !pm.PHASOR_ISVOLT[phi] {
u = "CUR"
unit = "Amp"
}
if ph == "" {
ph = u
}
if math.IsNaN(pm.PHASOR_MAG[phi]) {
fmt.Printf("WARN, device %d issues NaN magnitude\n", pm.IDCODE)
continue
}
if math.IsNaN(pm.PHASOR_ANG[phi]) {
fmt.Printf("WARN, device %d issues NaN angle\n", pm.IDCODE)
continue
}
skphmag := streamkey{Name: fmt.Sprintf("PH%dMAG %s", phi, ph),
Collection: ins.mkc(pm),
Unit: unit}
buf[skphmag] = append(buf[skphmag],
btrdb.RawPoint{Time: ts, Value: pm.PHASOR_MAG[phi]})
skphang := streamkey{Name: fmt.Sprintf("PH%dANG %s", phi, ph),
Collection: ins.mkc(pm),
Unit: "degrees"}
buf[skphang] = append(buf[skphang],
btrdb.RawPoint{Time: ts, Value: pm.PHASOR_ANG[phi]})
}
for ani, an := range pm.ANALOG_NAMES {
nm := fmt.Sprintf("AN%d %s", ani, an)
if an == "" {
nm = fmt.Sprintf("AN%d", ani)
}
if math.IsNaN(pm.ANALOG[ani]) {
fmt.Printf("WARN, device %d issues NaN analog channel\n", pm.IDCODE)
continue
}
ska := streamkey{Name: nm,
Collection: ins.mkc(pm),
Unit: "analog"}
buf[ska] = append(buf[ska],
btrdb.RawPoint{Time: ts, Value: pm.ANALOG[ani]})
}
for dgi, _ := range pm.DIGITAL_NAMES {
skd := streamkey{Name: fmt.Sprintf("DG%d", dgi),
Collection: ins.mkc(pm),
Unit: "digital"}
buf[skd] = append(buf[skd],
btrdb.RawPoint{Time: ts, Value: float64(pm.DIGITAL[dgi])})
}
}
} //end for over data
total := 0
for sk, dat := range buf {
ins.cachemu.Lock()
stream, ok := ins.streamcache[sk]
ins.cachemu.Unlock()
if !ok {
sz, err := ins.db.LookupStreams(context.Background(), sk.Collection,
false, btrdb.OptKV("name", sk.Name), nil)
if err != nil {
panic(err)
}
if len(sz) == 0 {
//create stream and assign to stream
uu := uuid.NewRandom()
st, err := ins.db.Create(context.Background(),
uu, sk.Collection, btrdb.M{"name": sk.Name, "unit": sk.Unit}, nil)
if err != nil {
panic(err)
}
stream = st
ins.cachemu.Lock()
ins.streamcache[sk] = stream
ins.cachemu.Unlock()
} else {
stream = sz[0]
ins.cachemu.Lock()
ins.streamcache[sk] = stream
ins.cachemu.Unlock()
}
}
total += len(dat)
err := stream.Insert(context.Background(), dat)
if err != nil {
fmt.Printf("Got insert error (ignoring): %v\n", err)
}
}
now := time.Now()
fmt.Printf("Batch of %d readings processed in %.2f ms\n", total, float64(now.Sub(then)/time.Microsecond)/1000.0)
}
}