-
Notifications
You must be signed in to change notification settings - Fork 1.2k
/
journal.go
152 lines (124 loc) · 2.75 KB
/
journal.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
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
package journal
import (
"encoding/json"
"fmt"
"os"
"path/filepath"
"time"
logging "github.com/ipfs/go-log"
"golang.org/x/xerrors"
"github.com/filecoin-project/lotus/build"
)
func InitializeSystemJournal(dir string) error {
if err := os.MkdirAll(dir, 0755); err != nil {
return err
}
j, err := OpenFSJournal(dir)
if err != nil {
return err
}
currentJournal = j
return nil
}
func Add(sys string, val interface{}) {
if currentJournal == nil {
log.Warn("no journal configured")
return
}
currentJournal.AddEntry(sys, val)
}
var log = logging.Logger("journal")
var currentJournal Journal
type Journal interface {
AddEntry(system string, obj interface{})
Close() error
}
// fsJournal is a basic journal backed by files on a filesystem
type fsJournal struct {
fi *os.File
fSize int64
journalDir string
incoming chan *JournalEntry
journalSizeLimit int64
closing chan struct{}
}
func OpenFSJournal(dir string) (Journal, error) {
fsj := &fsJournal{
journalDir: dir,
incoming: make(chan *JournalEntry, 32),
journalSizeLimit: 1 << 30,
closing: make(chan struct{}),
}
if err := fsj.rollJournalFile(); err != nil {
return nil, err
}
go fsj.runLoop()
return fsj, nil
}
type JournalEntry struct {
System string
Timestamp time.Time
Val interface{}
}
func (fsj *fsJournal) putEntry(je *JournalEntry) error {
b, err := json.Marshal(je)
if err != nil {
return err
}
n, err := fsj.fi.Write(append(b, '\n'))
if err != nil {
return err
}
fsj.fSize += int64(n)
if fsj.fSize >= fsj.journalSizeLimit {
return fsj.rollJournalFile()
}
return nil
}
const RFC3339nocolon = "2006-01-02T150405Z0700"
func (fsj *fsJournal) rollJournalFile() error {
if fsj.fi != nil {
err := fsj.fi.Close()
if err != nil {
return err
}
}
nfi, err := os.Create(filepath.Join(fsj.journalDir, fmt.Sprintf("lotus-journal-%s.ndjson", build.Clock.Now().Format(RFC3339nocolon))))
if err != nil {
return xerrors.Errorf("failed to open journal file: %w", err)
}
fsj.fi = nfi
fsj.fSize = 0
return nil
}
func (fsj *fsJournal) runLoop() {
for {
select {
case je := <-fsj.incoming:
if err := fsj.putEntry(je); err != nil {
log.Errorw("failed to write out journal entry", "entry", je, "err", err)
}
case <-fsj.closing:
if err := fsj.fi.Close(); err != nil {
log.Errorw("failed to close journal", "err", err)
}
return
}
}
}
func (fsj *fsJournal) AddEntry(system string, obj interface{}) {
je := &JournalEntry{
System: system,
Timestamp: build.Clock.Now(),
Val: obj,
}
select {
case fsj.incoming <- je:
case <-fsj.closing:
log.Warnw("journal closed but tried to log event", "entry", je)
}
}
func (fsj *fsJournal) Close() error {
close(fsj.closing)
return nil
}