Module: MaglevRecord::Snapshotable::ClassMethods

Defined in:
lib/maglev_record/snapshot/snapshotable.rb

Instance Method Summary collapse

Instance Method Details

#class_methods_not_to_snapshot ⇒ Object 



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# File 'lib/maglev_record/snapshot/snapshotable.rb', line 52

def class_methods_not_to_snapshot
  @class_methods_not_to_reset ||= []
  # hackady hack!
  # welcome to the big ball of mud and the 
  # "I do not know what goes on after hours trying"-architecture
  @class_methods_not_to_reset << "_validators"
  @class_methods_not_to_reset << "_validators="
  @class_methods_not_to_reset << "_validators?"
  #@class_methods_not_to_reset << "method_missing"
  @class_methods_not_to_reset << methods(false).select{|m| m.include? "callback" }
  @class_methods_not_to_reset.flatten!
  @class_methods_not_to_reset.map!(&:to_s)
  @class_methods_not_to_reset.uniq!
  @class_methods_not_to_reset
end

#class_methods_to_reset ⇒ Object 



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# File 'lib/maglev_record/snapshot/snapshotable.rb', line 76

def class_methods_to_reset
  snapshot_class_methods
end

#file_paths ⇒ Object 



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# File 'lib/maglev_record/snapshot/snapshotable.rb', line 22

def file_paths
  (self.instance_methods(false).map { |m|
    self.instance_method(m).source_location.first
  } + self.methods(false).map { |m|
    self.method(m).source_location.first
  }).uniq
end

#has_definitions? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/maglev_record/snapshot/snapshotable.rb', line 30

def has_definitions?
  # In nested transaction this error occurs:
  # Error 2101, objId i52279553 does not exist, during transaction boundary
  fp = file_paths
  without_methods do
    fp.each{ |file_path|
      Kernel.load file_path if File.file? file_path
    }
    return !file_paths.empty?
  end
end

#instance_methods_to_reset ⇒ Object 



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# File 'lib/maglev_record/snapshot/snapshotable.rb', line 80

def instance_methods_to_reset
  snapshot_instance_methods
end

#reset ⇒ Object

resets the class to no methods returns a memento proc that can be called to restore the old state



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# File 'lib/maglev_record/snapshot/snapshotable.rb', line 88

def reset
  _instance_methods = instance_methods_to_reset.map { |m|
    meth = instance_method m
    remove_method m
    meth
  }
  _class_methods = class_methods_to_reset.map { |m|
    meth = method m
    singleton_class.remove_method m
    meth
  }
  return Proc.new {
    instance_methods_to_reset.each { |m| remove_method m }
    class_methods_to_reset.each{ |m| singleton_class.remove_method m }
    _instance_methods.each{|m|
      define_method m.name, m
    }
    _class_methods.each{|m|
      singleton_class.define_method m.name, m
    }
    self
  }
end

#snapshot_class_methods ⇒ Object 



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# File 'lib/maglev_record/snapshot/snapshotable.rb', line 68

def snapshot_class_methods
  methods(false) - class_methods_not_to_snapshot
end

#snapshot_instance_methods ⇒ Object 



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# File 'lib/maglev_record/snapshot/snapshotable.rb', line 72

def snapshot_instance_methods
  instance_methods(false).reject{|m| m.include? 'callback' or m.include? 'valid'}
end

#without_methods ⇒ Object 



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# File 'lib/maglev_record/snapshot/snapshotable.rb', line 42

def without_methods
  return unless block_given?
  memento = reset
  begin
    yield
  ensure
    memento.call
  end
end