Class: LanGrove::Persistable

Inherits:
Object
  • Object
show all
Defined in:
lib/langrove/ext/persistable.rb

Instance Method Summary collapse

Constructor Details

#initialize(notifies = []) ⇒ Persistable

Returns a new instance of Persistable.



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# File 'lib/langrove/ext/persistable.rb', line 8

def initialize( notifies = [] )
  
  @notifies = notifies
  
  @notifies.each do |worker|
    
    Object.const_set( 
    
      worker.camelize, Class.new 
      
    ) ### ??unless defined already??
    
  end
  
end

Instance Method Details

#load_hash(hash_instance, from_file) ⇒ Object 



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# File 'lib/langrove/ext/persistable.rb', line 24

def load_hash( hash_instance, from_file )
  #
  # <hash_instance> as String (name of) variable storing the Hash
  #
  
  @logger.debug "loading from: #{from_file}" if @logger
  
  #
  # get the instance variable (late bind)
  #
  hash = self.instance_variable_get( hash_instance.to_sym )
  hash ||= {}
  
  begin
    
    #
    # load file contents, merge into hash and 
    # store it at the instance variable
    #
    persisted = YAML.load_file( from_file )
    hash.merge!( persisted ) if persisted.is_a?( Hash )
    self.instance_variable_set( hash_instance.to_sym, hash )
    
    #
    # set flag to 'already in storage'
    #
    @stored = true
  
  rescue Exception => e
    @logger.error "FAILED loading from #{from_file} #{e}" if @logger
    
  end
end

#store_hash(hash_instance, to_file) ⇒ Object 



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# File 'lib/langrove/ext/persistable.rb', line 59

def store_hash( hash_instance, to_file )
  #
  # <hash_instance> as String (name of) variable storing the Hash
  #
  
  if @stored != nil && @stored
    
    @logger.debug "storing to: #{to_file} skipped - no change"
    return
    
  end
  
  @logger.debug "storing to: #{to_file}"
  
  #
  # get the instance variable (late bind)
  #
  hash = self.instance_variable_get( hash_instance.to_sym )
  
  begin
  
    File.open(to_file, 'w') do |f|

      YAML::dump( hash, f )
      @stored = true
      
    end
    
    #@notifies.each do |worker|
    #
    #  Resque.enqueue(
    #  
    #    Object.const_get( worker.camelize ), to_file
    #    
    #  )
    #  
    #end
  
  rescue Exception => e
    @logger.error "FAILED storing to: #{to_file} #{e}" if @logger
    @stored = false
    
  end
end