126 lines
2.5 KiB
Go
126 lines
2.5 KiB
Go
package server
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import (
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"fmt"
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"sync"
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"time"
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"github.com/andig/evcc/core"
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"github.com/andig/evcc/util"
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influxdb2 "github.com/influxdata/influxdb-client-go/v2"
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influxlog "github.com/influxdata/influxdb-client-go/v2/log"
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)
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// InfluxConfig is the influx db configuration
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type InfluxConfig struct {
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URL string
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Database string
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Token string
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Org string
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User string
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Password string
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Interval time.Duration
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}
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// Influx is a influx publisher
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type Influx struct {
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sync.Mutex
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log *util.Logger
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client influxdb2.Client
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org string
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database string
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}
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// NewInfluxClient creates new publisher for influx
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func NewInfluxClient(url, token, org, user, password, database string) *Influx {
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log := util.NewLogger("influx")
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// InfluxDB v1 compatibility
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if token == "" && user != "" {
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token = fmt.Sprintf("%s:%s", user, password)
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}
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options := influxdb2.DefaultOptions().SetPrecision(time.Second)
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client := influxdb2.NewClientWithOptions(url, token, options)
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// handle error logging in writer
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influxlog.Log = nil
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return &Influx{
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log: log,
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client: client,
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org: org,
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database: database,
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}
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}
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// supportedType checks if type can be written as influx value
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func (m *Influx) supportedType(p util.Param) bool {
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if p.Val == nil {
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return true
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}
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switch val := p.Val.(type) {
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case float64:
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return true
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case [3]float64:
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return true
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case []float64:
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return len(val) == 3
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default:
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return false
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}
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}
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// Run Influx publisher
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func (m *Influx) Run(loadPoints []core.LoadPointAPI, in <-chan util.Param) {
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writer := m.client.WriteAPI(m.org, m.database)
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// log errors
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go func() {
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for err := range writer.Errors() {
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m.log.ERROR.Println(err)
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}
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}()
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// add points to batch for async writing
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for param := range in {
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if !m.supportedType(param) {
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continue
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}
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tags := map[string]string{}
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if param.LoadPoint != nil {
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tags["loadpoint"] = loadPoints[*param.LoadPoint].Name()
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}
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fields := map[string]interface{}{}
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// array to slice
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val := param.Val
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if v, ok := val.([3]float64); ok {
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val = v[:]
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}
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// add slice as phase values
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if phases, ok := val.([]float64); ok {
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var total float64
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for i, v := range phases {
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total += v
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fields[fmt.Sprintf("l%d", i+1)] = v
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}
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// add total as "value"
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val = total
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}
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fields["value"] = val
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// write asynchronously
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m.log.TRACE.Printf("write %s=%v (%v)", param.Key, param.Val, tags)
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p := influxdb2.NewPoint(param.Key, tags, fields, time.Now())
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writer.WritePoint(p)
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}
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m.client.Close()
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}
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