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72 lines
1.6 KiB
72 lines
1.6 KiB
package glog
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import (
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"encoding/json"
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"fmt"
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"net"
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"os"
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"strings"
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"time"
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)
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type logstashMessage struct {
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Type string `json:"type"`
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Message string `json:"message"`
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}
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// handleLogstashMessages sends logs to logstash.
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func (l *loggingT) handleLogstashMessages() {
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var conn net.Conn
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ticker := time.Tick(1 * time.Second)
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for {
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select {
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case _ = <-l.logstashStop:
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conn.Close()
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return
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case _ = <-ticker:
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var err error
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if conn == nil {
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fmt.Fprintln(os.Stderr, "Trying to connect to logstash server...")
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conn, err = net.Dial("tcp", l.logstashURL)
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if err != nil {
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conn = nil
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} else {
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fmt.Fprintln(os.Stderr, "Connected to logstash server.")
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}
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}
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case data := <-l.logstashChan:
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lm := logstashMessage{}
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lm.Type = l.logstashType
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lm.Message = strings.TrimSpace(data)
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packet, err := json.Marshal(lm)
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if err != nil {
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fmt.Fprintln(os.Stderr, "Failed to marshal logstashMessage.")
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continue
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}
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if conn != nil {
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_, err := fmt.Fprintln(conn, string(packet))
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if err != nil {
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fmt.Fprintln(os.Stderr, "Not connected to logstash server, attempting reconnect.")
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conn = nil
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continue
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}
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} else {
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// There is no connection, so the log line is dropped.
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// Might be nice to add a buffer here so that we can ship
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// logs after the connection is up.
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}
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}
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}
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}
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// StartLogstash creates the logstash channel and kicks off handleLogstashMessages.
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func (l *loggingT) startLogstash() {
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l.logstashChan = make(chan string, 100)
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go l.handleLogstashMessages()
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}
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// StopLogstash signals handleLogstashMessages to exit.
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func (l *loggingT) StopLogstash() {
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l.logstashStop <- true
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}
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