telegraf/plugins/outputs/nsq/nsq.go

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package nsq
import (
"fmt"
"github.com/nsqio/go-nsq"
"github.com/influxdata/telegraf"
"github.com/influxdata/telegraf/plugins/outputs"
"github.com/influxdata/telegraf/plugins/serializers"
)
type NSQ struct {
Server string
Topic string
producer *nsq.Producer
serializer serializers.Serializer
}
var sampleConfig = `
### Location of nsqd instance listening on TCP
server = "localhost:4150"
### NSQ topic for producer messages
topic = "telegraf"
### Data format to output. This can be "influx" or "graphite"
### Each data format has it's own unique set of configuration options, read
### more about them here:
### https://github.com/influxdata/telegraf/blob/master/DATA_FORMATS_OUTPUT.md
data_format = "influx"
`
func (n *NSQ) SetSerializer(serializer serializers.Serializer) {
n.serializer = serializer
}
func (n *NSQ) Connect() error {
config := nsq.NewConfig()
producer, err := nsq.NewProducer(n.Server, config)
if err != nil {
return err
}
n.producer = producer
return nil
}
func (n *NSQ) Close() error {
n.producer.Stop()
return nil
}
func (n *NSQ) SampleConfig() string {
return sampleConfig
}
func (n *NSQ) Description() string {
return "Send telegraf measurements to NSQD"
}
func (n *NSQ) Write(metrics []telegraf.Metric) error {
if len(metrics) == 0 {
return nil
}
for _, metric := range metrics {
values, err := n.serializer.Serialize(metric)
if err != nil {
return err
}
var pubErr error
for _, value := range values {
err = n.producer.Publish(n.Topic, []byte(value))
if err != nil {
pubErr = err
}
}
if pubErr != nil {
return fmt.Errorf("FAILED to send NSQD message: %s", err)
}
}
return nil
}
func init() {
outputs.Add("nsq", func() telegraf.Output {
return &NSQ{}
})
}