mirror of
https://github.com/prometheus/prometheus.git
synced 2024-12-26 22:19:40 -08:00
117 lines
2.6 KiB
Go
117 lines
2.6 KiB
Go
package client
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"net"
|
|
"time"
|
|
)
|
|
|
|
const (
|
|
// UDPPayloadSize is a reasonable default payload size for UDP packets that
|
|
// could be travelling over the internet.
|
|
UDPPayloadSize = 512
|
|
)
|
|
|
|
// UDPConfig is the config data needed to create a UDP Client.
|
|
type UDPConfig struct {
|
|
// Addr should be of the form "host:port"
|
|
// or "[ipv6-host%zone]:port".
|
|
Addr string
|
|
|
|
// PayloadSize is the maximum size of a UDP client message, optional
|
|
// Tune this based on your network. Defaults to UDPPayloadSize.
|
|
PayloadSize int
|
|
}
|
|
|
|
// NewUDPClient returns a client interface for writing to an InfluxDB UDP
|
|
// service from the given config.
|
|
func NewUDPClient(conf UDPConfig) (Client, error) {
|
|
var udpAddr *net.UDPAddr
|
|
udpAddr, err := net.ResolveUDPAddr("udp", conf.Addr)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
conn, err := net.DialUDP("udp", nil, udpAddr)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
payloadSize := conf.PayloadSize
|
|
if payloadSize == 0 {
|
|
payloadSize = UDPPayloadSize
|
|
}
|
|
|
|
return &udpclient{
|
|
conn: conn,
|
|
payloadSize: payloadSize,
|
|
}, nil
|
|
}
|
|
|
|
// Close releases the udpclient's resources.
|
|
func (uc *udpclient) Close() error {
|
|
return uc.conn.Close()
|
|
}
|
|
|
|
type udpclient struct {
|
|
conn io.WriteCloser
|
|
payloadSize int
|
|
}
|
|
|
|
func (uc *udpclient) Write(bp BatchPoints) error {
|
|
var b = make([]byte, 0, uc.payloadSize) // initial buffer size, it will grow as needed
|
|
var d, _ = time.ParseDuration("1" + bp.Precision())
|
|
|
|
var delayedError error
|
|
|
|
var checkBuffer = func(n int) {
|
|
if len(b) > 0 && len(b)+n > uc.payloadSize {
|
|
if _, err := uc.conn.Write(b); err != nil {
|
|
delayedError = err
|
|
}
|
|
b = b[:0]
|
|
}
|
|
}
|
|
|
|
for _, p := range bp.Points() {
|
|
p.pt.Round(d)
|
|
pointSize := p.pt.StringSize() + 1 // include newline in size
|
|
//point := p.pt.RoundedString(d) + "\n"
|
|
|
|
checkBuffer(pointSize)
|
|
|
|
if p.Time().IsZero() || pointSize <= uc.payloadSize {
|
|
b = p.pt.AppendString(b)
|
|
b = append(b, '\n')
|
|
continue
|
|
}
|
|
|
|
points := p.pt.Split(uc.payloadSize - 1) // account for newline character
|
|
for _, sp := range points {
|
|
checkBuffer(sp.StringSize() + 1)
|
|
b = sp.AppendString(b)
|
|
b = append(b, '\n')
|
|
}
|
|
}
|
|
|
|
if len(b) > 0 {
|
|
if _, err := uc.conn.Write(b); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return delayedError
|
|
}
|
|
|
|
func (uc *udpclient) Query(q Query) (*Response, error) {
|
|
return nil, fmt.Errorf("Querying via UDP is not supported")
|
|
}
|
|
|
|
func (uc *udpclient) QueryAsChunk(q Query) (*ChunkedResponse, error) {
|
|
return nil, fmt.Errorf("Querying via UDP is not supported")
|
|
}
|
|
|
|
func (uc *udpclient) Ping(timeout time.Duration) (time.Duration, string, error) {
|
|
return 0, "", nil
|
|
}
|