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