Class: Listen::Adapter::Base

Inherits:
Object
  • Object
show all
Includes:
Celluloid
Defined in:
lib/listen/adapter/base.rb

Direct Known Subclasses

BSD, Darwin, Linux, Polling, TCP, Windows

Constant Summary collapse

DEFAULTS =

TODO: only used by tests

{}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(opts) ⇒ Base

Returns a new instance of Base.



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# File 'lib/listen/adapter/base.rb', line 13

def initialize(opts)
  @configured = nil
  options = opts.dup
  @mq = options.delete(:mq)
  @directories = options.delete(:directories)

  Array(@directories).each do |dir|
    next if dir.is_a?(Pathname)
    fail ArgumentError, "not a Pathname: #{dir.inspect}"
  end

  # TODO: actually use this in every adapter
  @recursion = options.delete(:recursion)
  @recursion = true if @recursion.nil?

  defaults = self.class.const_get('DEFAULTS')
  @options = Listen::Options.new(options, defaults)
rescue
  _log_exception 'adapter config failed: %s:%s called from: %s', caller
  raise
end

Instance Attribute Details

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/listen/adapter/base.rb', line 8

def options
  @options
end

Class Method Details

.local_fs? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/listen/adapter/base.rb', line 67

def self.local_fs?
  true
end

.usable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/listen/adapter/base.rb', line 71

def self.usable?
  const_get('OS_REGEXP') =~ RbConfig::CONFIG['target_os']
end

Instance Method Details

#configure ⇒ Object

TODO: it’s a separate method as a temporary workaround for tests



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# File 'lib/listen/adapter/base.rb', line 36

def configure
  return if @configured
  @configured = true

  @callbacks ||= {}
  @directories.each do |dir|
    unless dir.is_a?(Pathname)
      fail ArgumentError, "not a Pathname: #{dir.inspect}"
    end

    callback = @callbacks[dir] || lambda do |event|
      _process_event(dir, event)
    end
    @callbacks[dir] = callback
    _configure(dir, &callback)
  end
end

#start ⇒ Object 



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# File 'lib/listen/adapter/base.rb', line 54

def start
  configure
  calling_stack = caller.dup
  Listen::Internals::ThreadPool.add do
    begin
      _run
    rescue
      _log_exception "run() in thread failed: %s:\n %s\n\ncalled from:\n %s", calling_stack
      raise
    end
  end
end