Module: GL::Chain

Defined in:
lib/gl/command/chain.rb

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/gl/command/chain.rb', line 5

def self.included(base)
  base.class_eval do
    extend ClassMethods

    @commands = []
  end
end

Instance Method Details

#call_command(command) ⇒ Object

Raises:



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# File 'lib/gl/command/chain.rb', line 42

def call_command(command)
  @commands_called << command
  @context = command.call(@context)
  raise ContextFailure if @context.failure?
end

#commands ⇒ Object 



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# File 'lib/gl/command/chain.rb', line 23

def commands
  self.class.commands
end

#perform ⇒ Object 



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# File 'lib/gl/command/chain.rb', line 27

def perform
  run_callbacks :call do
    @commands_called = []
    commands.each { |command| call_command(command) }
  end
rescue ContextFailure
  rollback
end

#rollback ⇒ Object 



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# File 'lib/gl/command/chain.rb', line 36

def rollback
  @commands_called.reverse_each do |command|
    command.new(@context).rollback
  end
end