Class: IndexStorage

Inherits:
Object
  • Object
show all
Defined in:
lib/ObjectModel/Indexes/IndexStorage.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, dir) ⇒ IndexStorage

Returns a new instance of IndexStorage.



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# File 'lib/ObjectModel/Indexes/IndexStorage.rb', line 7

def initialize name, dir
	folder = File.expand_path "#{dir}/#{name}"
	Dir.mkdir folder unless File.exist? folder		
	@db = Sequel.connect("sqlite://#{folder}/#{name}_indexes.db")
	@db.logger = log
	
	initialize_db unless @db.table_exists? :metadata						
	
	@metadata ||= @db[:metadata]		
	@tables = {}		
end

Instance Attribute Details

#db ⇒ Object (readonly)

Returns the value of attribute db.



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# File 'lib/ObjectModel/Indexes/IndexStorage.rb', line 4

def db
  @db
end

#index_manager=(value) ⇒ Object (writeonly)

Sets the attribute index_manager

Parameters:

  • value —

    the value to set the attribute index_manager to.



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# File 'lib/ObjectModel/Indexes/IndexStorage.rb', line 5

def index_manager=(value)
  @index_manager = value
end

Instance Method Details

#[](type) ⇒ Object 



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# File 'lib/ObjectModel/Indexes/IndexStorage.rb', line 19

def [] type
	@tables[type] ||= @db[type]
end

#close ⇒ Object 



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# File 'lib/ObjectModel/Indexes/IndexStorage.rb', line 36

def close
	@tables.clear
	@db.disconnect
end

#generate(generator_name) ⇒ Object 



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# File 'lib/ObjectModel/Indexes/IndexStorage.rb', line 23

def generate generator_name
	generator_name = generator_name.to_s
	@db.transaction do 
		unless row = @metadata[:key => generator_name]
			@metadata << {:key => generator_name, :value => "0"}
			row = @metadata[:key => generator_name]
		end
		id = @metadata[:key => generator_name.to_s][:value].to_i
		@metadata.filter(:key => generator_name).update(:value => (id + 1).to_s)
		return id.to_s
	end
end

#print(name = nil) ⇒ Object 



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# File 'lib/ObjectModel/Indexes/IndexStorage.rb', line 45

def print name = nil
	@index_manager.indexes.values.each{|index| index.print_storage name}
end

#transaction(&b) ⇒ Object 



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# File 'lib/ObjectModel/Indexes/IndexStorage.rb', line 41

def transaction &b
	@db.transaction &b
end