forked from elastic/beats
/
harvester.go
74 lines (62 loc) · 1.38 KB
/
harvester.go
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package udp
import (
"net"
"time"
"github.com/elastic/beats/libbeat/beat"
"github.com/elastic/beats/libbeat/common"
"github.com/elastic/beats/libbeat/logp"
"github.com/elastic/beats/filebeat/harvester"
"github.com/elastic/beats/filebeat/util"
)
type Harvester struct {
forwarder *harvester.Forwarder
done chan struct{}
cfg *common.Config
listener net.PacketConn
}
func NewHarvester(forwarder *harvester.Forwarder, cfg *common.Config) *Harvester {
return &Harvester{
done: make(chan struct{}),
cfg: cfg,
forwarder: forwarder,
}
}
func (h *Harvester) Run() error {
config := defaultConfig
err := h.cfg.Unpack(&config)
if err != nil {
return err
}
h.listener, err = net.ListenPacket("udp", config.Host)
if err != nil {
return err
}
defer h.listener.Close()
logp.Info("Started listening for udp on: %s", config.Host)
buffer := make([]byte, config.MaxMessageSize)
for {
select {
case <-h.done:
return nil
default:
}
length, _, err := h.listener.ReadFrom(buffer)
if err != nil {
logp.Err("Error reading from buffer: %v", err.Error())
continue
}
data := util.NewData()
data.Event = beat.Event{
Timestamp: time.Now(),
Fields: common.MapStr{
"message": string(buffer[:length]),
},
}
h.forwarder.Send(data)
}
}
func (h *Harvester) Stop() {
logp.Info("Stopping udp harvester")
close(h.done)
h.listener.Close()
}