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34 lines
1.3 KiB
Go
34 lines
1.3 KiB
Go
package store
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type watcher struct {
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eventChan chan *Event
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recursive bool
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sinceIndex uint64
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}
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// notify function notifies the watcher. If the watcher interests in the given path,
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// the function will return true.
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func (w *watcher) notify(e *Event, originalPath bool, deleted bool) bool {
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// watcher is interested the path in three cases and under one condition
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// the condition is that the event happens after the watcher's sinceIndex
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// 1. the path at which the event happens is the path the watcher is watching at.
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// For example if the watcher is watching at "/foo" and the event happens at "/foo",
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// the watcher must be interested in that event.
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// 2. the watcher is a recursive watcher, it interests in the event happens after
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// its watching path. For example if watcher A watches at "/foo" and it is a recursive
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// one, it will interest in the event happens at "/foo/bar".
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// 3. when we delete a directory, we need to force notify all the watchers who watches
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// at the file we need to delete.
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// For example a watcher is watching at "/foo/bar". And we deletes "/foo". The watcher
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// should get notified even if "/foo" is not the path it is watching.
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if (w.recursive || originalPath || deleted) && e.Index >= w.sinceIndex {
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w.eventChan <- e
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return true
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}
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return false
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}
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