mirror of
https://github.com/syncthing/syncthing.git
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120 lines
2.5 KiB
Go
120 lines
2.5 KiB
Go
// Copyright (C) 2014 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 http://mozilla.org/MPL/2.0/.
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package model
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import (
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"fmt"
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"math/rand"
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"time"
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"github.com/syncthing/syncthing/internal/sync"
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)
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type roFolder struct {
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stateTracker
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folder string
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intv time.Duration
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timer *time.Timer
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model *Model
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stop chan struct{}
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delayScan chan time.Duration
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}
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func newROFolder(model *Model, folder string, interval time.Duration) *roFolder {
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return &roFolder{
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stateTracker: stateTracker{
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folder: folder,
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mut: sync.NewMutex(),
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},
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folder: folder,
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intv: interval,
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timer: time.NewTimer(time.Millisecond),
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model: model,
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stop: make(chan struct{}),
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delayScan: make(chan time.Duration),
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}
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}
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func (s *roFolder) Serve() {
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if debug {
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l.Debugln(s, "starting")
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defer l.Debugln(s, "exiting")
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}
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defer func() {
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s.timer.Stop()
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}()
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reschedule := func() {
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// Sleep a random time between 3/4 and 5/4 of the configured interval.
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sleepNanos := (s.intv.Nanoseconds()*3 + rand.Int63n(2*s.intv.Nanoseconds())) / 4
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s.timer.Reset(time.Duration(sleepNanos) * time.Nanosecond)
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}
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initialScanCompleted := false
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for {
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select {
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case <-s.stop:
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return
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case <-s.timer.C:
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if err := s.model.CheckFolderHealth(s.folder); err != nil {
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l.Infoln("Skipping folder", s.folder, "scan due to folder error:", err)
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reschedule()
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continue
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}
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if debug {
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l.Debugln(s, "rescan")
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}
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if err := s.model.ScanFolder(s.folder); err != nil {
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// Potentially sets the error twice, once in the scanner just
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// by doing a check, and once here, if the error returned is
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// the same one as returned by CheckFolderHealth, though
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// duplicate set is handled by setError.
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s.setError(err)
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reschedule()
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continue
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}
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if !initialScanCompleted {
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l.Infoln("Completed initial scan (ro) of folder", s.folder)
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initialScanCompleted = true
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}
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if s.intv == 0 {
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return
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}
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reschedule()
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case next := <-s.delayScan:
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s.timer.Reset(next)
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}
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}
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}
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func (s *roFolder) Stop() {
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close(s.stop)
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}
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func (s *roFolder) String() string {
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return fmt.Sprintf("roFolder/%s@%p", s.folder, s)
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}
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func (s *roFolder) BringToFront(string) {}
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func (s *roFolder) Jobs() ([]string, []string) {
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return nil, nil
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}
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func (s *roFolder) DelayScan(next time.Duration) {
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s.delayScan <- next
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}
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