This repository has been archived by the owner on Feb 12, 2022. It is now read-only.
forked from logplex/pg_logplexcollector
/
logfile.go
90 lines (75 loc) · 1.61 KB
/
logfile.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
package main
import (
"bufio"
"bytes"
"fmt"
"io"
"log"
"os"
"regexp"
"time"
"github.com/fsnotify/fsnotify"
"github.com/logplex/logplexc"
)
var redisPrefix = regexp.MustCompile(`([-*#] .*)`)
func lineWorker(die dieCh, f *os.File, cfg logplexc.Config, sr *serveRecord) {
cfg.Logplex = sr.u
target, err := logplexc.NewClient(&cfg)
if err != nil {
log.Fatalf("could not create logging client: %v", err)
}
watcher, err := fsnotify.NewWatcher()
if err != nil {
log.Printf("can't create watcher: %v", err)
}
defer watcher.Close()
r := bufio.NewReader(f)
go func() {
for {
select {
case <-die:
return
case event := <-watcher.Events:
if event.Op&fsnotify.Write == fsnotify.Write {
for {
l, err := r.ReadBytes('\n')
// Allow service specific changes
l = parseLog(sr, l)
// Don't emit empty lines
l = bytes.TrimSpace(l)
if len(l) == 0 {
break
}
// Append log prefix
l = append([]byte(fmt.Sprintf("%s ", sr.Prefix)), l...)
// Send the log line
target.BufferMessage(134, time.Now(), sr.Service,
sr.Service, l)
if err != nil {
if err == io.EOF {
break
}
log.Printf("unexpected read error: %v", err)
}
}
}
case err := <-watcher.Errors:
log.Printf("unexpected fs watch error %v:", err)
}
}
}()
if err := watcher.Add(f.Name()); err != nil {
log.Printf("can't add watcher: %v", err)
}
<-die
}
func parseLog(sr *serveRecord, l []byte) []byte {
switch sr.Service {
case "redis":
m := redisPrefix.Find(l)
if len(m) > 1 {
return m
}
}
return l
}