Class: Perennial::Reloading

Inherits:
Object show all
Includes:
Loggable
Defined in:
lib/perennial/reloading.rb

Class Method Summary collapse

Methods included from Loggable

included, #logger

Class Method Details

.reload! ⇒ Object 



18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
 
# File 'lib/perennial/reloading.rb', line 18

def self.reload!
  self.mapping.each_pair do |constant, file|
    next unless File.mtime(file) > self.mtimes[file]
    begin
      # Get a relative name and namespace
      parts = constant.split("::")
      name = parts.pop
      ns = parts.inject(Object) { |a, c| a.const_get(c) }
      # Notify object pre-reload.
      final = ns.const_get(name)
      final.reloading! if final.respond_to?(:reloading!)
      final = nil
      # Remove the constant
      ns.send(:remove_const, name)
      load(file)
      # Notify the object it was reloaded...
      final = ns.const_get(name)
      final.reloaded! if final.respond_to?(:reloaded!)
      # Finally, update the mtime
      self.mtimes[file] = File.mtime(file)
    rescue Exception => e
      logger.fatal "Exception reloading #{file} (for #{constant})"
      Perennial::ExceptionTracker.log(e)
    end
  end
end

.watch(file, relative_to = File.dirname(file)) ⇒ Object

Raises:

  • (ArgumentError) 


9
10
11
12
13
14
15
16
 
# File 'lib/perennial/reloading.rb', line 9

def self.watch(file, relative_to = File.dirname(file))
  file = File.expand_path(file)
  raise ArgumentError, "You must provide the path to a file" unless File.file?(file)
  relative = file.gsub(/^#{File.expand_path(relative_to)}\//, '')
  name = relative.gsub(/\.rb$/, '').split("/").map { |part| part.camelize }.join("::")
  self.mapping[name] = file
  self.mtimes[file] = File.mtime(file)
end