Class: TMP::Instance

Inherits:
Object
  • Object
show all
Defined in:
lib/tmp/instance.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(tmp_folder = nil) ⇒ Instance

Returns a new instance of Instance.



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# File 'lib/tmp/instance.rb', line 5

def initialize(tmp_folder=nil)
  @tmpdir = tmp_folder || get_system_tmpdir
end

Instance Attribute Details

#tmpdir ⇒ Object (readonly)

Returns the value of attribute tmpdir.



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# File 'lib/tmp/instance.rb', line 3

def tmpdir
  @tmpdir
end

Instance Method Details

#[](file_name) ⇒ Object 



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# File 'lib/tmp/instance.rb', line 15

def [](file_name)
  open(file_name, 'r') do |f|
    begin
      Marshal.load(f.read)
    rescue ArgumentError => ex
      ex.message.to_s.include?('marshal') ? nil : raise(ex)
    end
  end
end

#[]=(file_name, dump_object) ⇒ Object 



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# File 'lib/tmp/instance.rb', line 9

def []=(file_name, dump_object)
  open(file_name, 'w+') do |file|
    file.write(Marshal.dump(dump_object))
  end
end

#open(file_name, *args) ⇒ Object 



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# File 'lib/tmp/instance.rb', line 25

def open(file_name, *args)

  file_path = path_for(file_name)

  File.open(file_path, *args) do |f|
    begin
      f.flock(File::LOCK_EX)
      yield(f)
    ensure
      f.flock(File::LOCK_UN)
    end
  end

rescue Errno::ENOENT
  File.open(file_path, 'a') {}
  retry
end

#path_for(file_name) ⇒ Object 



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# File 'lib/tmp/instance.rb', line 43

def path_for(file_name)
  File.join(tmpdir, file_name)
end