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fs: update ChangeNotifier interface

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This introduces a channel to the ChangeNotify function, which can be
used to update the poll-interval and cleanly exit the polling function.
This commit is contained in:
Fabian Möller 2018-08-25 21:28:57 +02:00
parent 96ce49ec4e
commit 1eec59e091
7 changed files with 103 additions and 53 deletions
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10
fs/fs.go
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@ -424,7 +424,7 @@ type Features struct {
// ChangeNotify calls the passed function with a path
// that has had changes. If the implementation
// uses polling, it should adhere to the given interval.
ChangeNotify func(func(string, EntryType), time.Duration) chan bool
ChangeNotify func(func(string, EntryType), <-chan time.Duration)
// UnWrap returns the Fs that this Fs is wrapping
UnWrap func() Fs
@ -724,7 +724,13 @@ type ChangeNotifier interface {
// ChangeNotify calls the passed function with a path
// that has had changes. If the implementation
// uses polling, it should adhere to the given interval.
ChangeNotify(func(string, EntryType), time.Duration) chan bool
// At least one value will be written to the channel,
// specifying the initial value and updated values might
// follow. A 0 Duration should pause the polling.
// The ChangeNotify implemantion must empty the channel
// regulary. When the channel gets closed, the implemantion
// should stop polling and release resources.
ChangeNotify(func(string, EntryType), <-chan time.Duration)
}
// UnWrapper is an optional interfaces for Fs