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org.apache.commons.io.monitor
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This package provides a component for monitoring file system events
(directory and file create, update and delete events).
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???A listener that receives events of file system modifications.FileAlterationObserver represents the state of files below a root directory, checking the file system and notifying listeners of create, change or delete events.The state of a file or directory, capturing the following
File
attributes at a point in time.