-
-
Notifications
You must be signed in to change notification settings - Fork 4.1k
/
folderstate.go
128 lines (105 loc) · 2.69 KB
/
folderstate.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
// Copyright (C) 2015 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
package model
import (
"time"
"github.com/syncthing/syncthing/lib/events"
"github.com/syncthing/syncthing/lib/sync"
)
type folderState int
const (
FolderIdle folderState = iota
FolderScanning
FolderScanWaiting
FolderSyncing
FolderError
)
func (s folderState) String() string {
switch s {
case FolderIdle:
return "idle"
case FolderScanning:
return "scanning"
case FolderScanWaiting:
return "scan-waiting"
case FolderSyncing:
return "syncing"
case FolderError:
return "error"
default:
return "unknown"
}
}
type stateTracker struct {
folderID string
mut sync.Mutex
current folderState
err error
changed time.Time
}
func newStateTracker(id string) stateTracker {
return stateTracker{
folderID: id,
mut: sync.NewMutex(),
}
}
// setState sets the new folder state, for states other than FolderError.
func (s *stateTracker) setState(newState folderState) {
if newState == FolderError {
panic("must use setError")
}
s.mut.Lock()
if newState != s.current {
/* This should hold later...
if s.current != FolderIdle && (newState == FolderScanning || newState == FolderSyncing) {
panic("illegal state transition " + s.current.String() + " -> " + newState.String())
}
*/
eventData := map[string]interface{}{
"folder": s.folderID,
"to": newState.String(),
"from": s.current.String(),
}
if !s.changed.IsZero() {
eventData["duration"] = time.Since(s.changed).Seconds()
}
s.current = newState
s.changed = time.Now()
events.Default.Log(events.StateChanged, eventData)
}
s.mut.Unlock()
}
// getState returns the current state, the time when it last changed, and the
// current error or nil.
func (s *stateTracker) getState() (current folderState, changed time.Time, err error) {
s.mut.Lock()
current, changed, err = s.current, s.changed, s.err
s.mut.Unlock()
return
}
// setError sets the folder state to FolderError with the specified error or
// to FolderIdle if the error is nil
func (s *stateTracker) setError(err error) {
s.mut.Lock()
defer s.mut.Unlock()
eventData := map[string]interface{}{
"folder": s.folderID,
"from": s.current.String(),
}
if err != nil {
eventData["error"] = err.Error()
s.current = FolderError
} else {
s.current = FolderIdle
}
eventData["to"] = s.current.String()
if !s.changed.IsZero() {
eventData["duration"] = time.Since(s.changed).Seconds()
}
s.err = err
s.changed = time.Now()
events.Default.Log(events.StateChanged, eventData)
}