class DirectoryWatcher::CoolioScanner
The CoolioScanner uses the Coolio loop to monitor changes to files in the watched directory. This scanner is more efficient than the pure Ruby scanner because it relies on the operating system kernel notifications instead of a periodic polling and stat of every file in the watched directory (the technique used by the Scanner class).
Coolio cannot notify us when a file is added to the watched directory; therefore, added files are only picked up when we apply the glob pattern to the directory. This is done at the configured interval.
Public Class Methods
# File lib/directory_watcher/coolio_scanner.rb, line 24 def initialize( config ) super(config) end
Public Instance Methods
Return the cool.io loop object.
This is used during the startup, shutdown process and for the Watcher to attach and detach from the event loop
# File lib/directory_watcher/coolio_scanner.rb, line 56 def event_loop if @loop_thread then @loop_thread._coolio_loop else Thread.current._coolio_loop end end
Called by EventablScanner#start to start the loop up and attach the periodic timer that will poll the globs for new files.
# File lib/directory_watcher/coolio_scanner.rb, line 31 def start_loop_with_attached_scan_timer return if @loop_thread @timer = ScanTimer.new( self ) @loop_thread = Thread.new { @timer.attach(event_loop) event_loop.run } end
Called by EventableScanner#stop to stop the loop as part of the shutdown process.
# File lib/directory_watcher/coolio_scanner.rb, line 43 def stop_loop if @loop_thread then event_loop.stop rescue nil @loop_thread.kill @loop_thread = nil end end