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package snmp
import (
"time"
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"log"
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"encoding/json"
"udi/config"
"udi/handlers/handler"
"udi/database"
)
type SnmpHandler struct {
handler.CommonHandler
dbh *database.DatabaseHandle
}
type endpoint_t struct {
Label string `json:"label"`
Variable string `json:"variable"`
Value string `json:"value"`
}
type observation_t struct {
Device string `json:"device"`
Label string `json:"label"`
Variables map[string]endpoint_t `json:"variables"`
}
func New(id string, config config.HandlerConfigT) handler.Handler {
t := &SnmpHandler {
}
t.Id = id
t.dbh = database.NewDatabaseHandle()
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log.Printf("Handler SNMP %d initialized", id)
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return t
}
func (self *SnmpHandler) Handle(message handler.MessageT) {
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// log.Printf("Handler SNMP %d processing %s -> %s", self.Id, message.Topic, message.Payload)
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var observation observation_t
err := json.Unmarshal([]byte(message.Payload), &observation)
if err != nil {
self.Lost("Unable to parse payload into Observation struct", err, message)
return
}
var measurement database.Measurement
measurement.Time = time.Now()
measurement.Application = "SNMP"
measurement.Device = observation.Device
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measurement.Attributes = map[string]interface{} {
"Label": observation.Label,
}
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measurement.Values = make(map[string]database.VariableType)
for k, v := range observation.Variables {
measurement.Values[k] = database.VariableType {
Label: v.Label,
Variable: v.Variable,
Unit: "",
Value: v.Value,
}
}
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// log.Printf("Prepared measurement item: %s", measurement)
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self.dbh.StoreMeasurement(&measurement)
self.S()
}