89 lines
1.9 KiB
Go
89 lines
1.9 KiB
Go
package graphite
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import (
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"bufio"
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"io"
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"log"
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"net"
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"strings"
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"github.com/influxdb/influxdb"
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)
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// TCPServer processes Graphite data received over TCP connections.
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type TCPServer struct {
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writer SeriesWriter
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parser *Parser
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database string
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Logger *log.Logger
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}
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// NewTCPServer returns a new instance of a TCPServer.
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func NewTCPServer(p *Parser, w SeriesWriter, db string) *TCPServer {
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return &TCPServer{
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parser: p,
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writer: w,
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database: db,
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}
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}
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// SetLogOutput sets writer for all Graphite log output.
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func (s *TCPServer) SetLogOutput(w io.Writer) {
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s.Logger = log.New(w, "[graphite] ", log.LstdFlags)
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}
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// ListenAndServe instructs the TCPServer to start processing Graphite data
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// on the given interface. iface must be in the form host:port
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func (t *TCPServer) ListenAndServe(iface string) error {
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if iface == "" { // Make sure we have an address
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return ErrBindAddressRequired
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}
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ln, err := net.Listen("tcp", iface)
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if err != nil {
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return err
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}
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go func() {
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for {
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conn, err := ln.Accept()
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if err != nil {
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t.Logger.Println("error accepting TCP connection", err.Error())
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continue
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}
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go t.handleConnection(conn)
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}
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}()
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return nil
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}
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// handleConnection services an individual TCP connection.
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func (t *TCPServer) handleConnection(conn net.Conn) {
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defer conn.Close()
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reader := bufio.NewReader(conn)
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for {
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// Read up to the next newline.
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buf, err := reader.ReadBytes('\n')
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if err != nil {
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return
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}
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// Trim the buffer, even though there should be no padding
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line := strings.TrimSpace(string(buf))
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// Parse it.
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point, err := t.parser.Parse(line)
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if err != nil {
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t.Logger.Printf("unable to parse data: %s", err)
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continue
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}
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// Send the data to the writer.
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_, e := t.writer.WriteSeries(t.database, "", []influxdb.Point{point})
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if e != nil {
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t.Logger.Printf("failed to write data point to database %q: %s\n", t.database, e)
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}
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}
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}
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