/
mqlux.go
171 lines (150 loc) · 3.7 KB
/
mqlux.go
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package main
import (
"bytes"
"flag"
"fmt"
"io"
"log"
"os"
"os/signal"
"syscall"
"time"
"github.com/ktt-ol/mqlux/internal/router"
"github.com/BurntSushi/toml"
"github.com/comail/colog"
"github.com/ktt-ol/mqlux/internal/config"
"github.com/ktt-ol/mqlux/internal/debug"
"github.com/ktt-ol/mqlux/internal/handler/csv"
"github.com/ktt-ol/mqlux/internal/handler/keepalive"
"github.com/ktt-ol/mqlux/internal/handler/topic"
"github.com/ktt-ol/mqlux/internal/influxdb"
"github.com/ktt-ol/mqlux/internal/mqlux"
"github.com/ktt-ol/mqlux/internal/mqtt"
"github.com/ktt-ol/mqlux/internal/parser"
"github.com/ktt-ol/mqlux/internal/parser/script"
)
var version = "master"
func main() {
colog.Register()
colog.ParseFields(true)
colog.SetMinLevel(colog.LInfo)
configFile := flag.String("config", "mqlux.tml", "configuration")
csvFile := flag.String("messages-csv", "", "read messages from CSV file; disables InfluxDB output")
isDebug := flag.Bool("debug", false, "print debug messages")
printVersion := flag.Bool("version", false, "print version and exit")
flag.Parse()
if *printVersion {
fmt.Printf("mqlux %s\n", version)
os.Exit(0)
}
if *isDebug {
colog.SetMinLevel(colog.LDebug)
// mqtt debug is very verbose
// mqtt.DEBUG = log.New(os.Stdout, "[mqtt] ", log.LstdFlags)
}
config := config.Config{}
_, err := toml.DecodeFile(*configFile, &config)
if err != nil {
log.Fatal(err)
}
var writer mqlux.Writer
if config.InfluxDB.URL != "" && *csvFile == "" {
db, err := influxdb.NewInfluxDBClient(config)
if err != nil {
log.Fatal(err)
}
writer = db.Write
} else {
writer = func(recs []mqlux.Record) error { return nil }
}
if *isDebug {
// wrap original writer with debug logger
origWriter := writer
writer = func(recs []mqlux.Record) error {
var buf bytes.Buffer
for _, rec := range recs {
buf.Reset()
buf.WriteString("measurement ")
buf.WriteString(rec.Measurement)
fmt.Fprintf(&buf, " -> %v ", rec.Value)
for k, v := range rec.Tags {
buf.WriteString(k)
buf.WriteString("='")
buf.WriteString(v)
buf.WriteString("' ")
}
log.Println(buf.String())
}
return origWriter(recs)
}
}
r := router.New()
if config.MQTT.CSVLog != "" && *csvFile == "" {
var out io.Writer
if config.MQTT.CSVLog == "-" {
out = os.Stdout
} else {
f, err := os.OpenFile(config.MQTT.CSVLog, os.O_RDWR|os.O_APPEND|os.O_CREATE, 0644)
if err != nil {
log.Fatal(err)
}
defer f.Close()
out = f
}
logger, err := csv.NewMQTTLogger(out)
if err != nil {
log.Fatal(err)
}
defer logger.Stop()
r.Add("/#", logger)
}
if config.MQTT.KeepAlive != "" && *csvFile == "" {
keepAlive, err := time.ParseDuration(config.MQTT.KeepAlive)
if err != nil {
log.Fatal("invalid keepalive duration", err)
}
watchdog := keepalive.NewWatchdogHandler(keepAlive)
defer watchdog.Stop()
r.Add("/#", watchdog)
}
for _, sub := range config.Subscriptions {
var p mqlux.Parser
if sub.Script != "" {
vm, err := script.New(sub.Script)
if err != nil {
log.Fatal(err)
}
p = vm.Parse
} else {
p = parser.FloatParser
}
handler, err := topic.New(
sub.Topic,
sub.Measurement,
sub.Tags,
p,
writer,
)
handler.IncludeRetained(sub.IncludeRetained)
if err != nil {
log.Fatal(err)
}
r.Add(handler.Topic(), handler)
}
if *csvFile != "" {
err = debug.MessagesFromCSV(*csvFile, r.Receive)
if err != nil {
log.Fatal(err)
}
return
}
log.Printf("debug: connecting to subscribe")
_, err = mqtt.Subscribe(config.MQTT, r.Receive)
if err != nil {
log.Fatal(err)
}
sigs := make(chan os.Signal, 1)
signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
s := <-sigs
log.Print("debug: exiting: ", s)
}