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Contents
require 'amalgalite/sqlite3/constants'
module Amalgalite::SQLite3
class Database
#
# A Stat represents a single Database Status code and its current highwater mark.
#
# Some stats may not have a current or a highwater value, in those cases
# the associated _has_current?_ or _has_highwater?_ method returns false and the
# _current_ or _highwater_ method also returns +nil+.
#
class Stat
attr_reader :name
attr_reader :code
def initialize( api_db, name )
@name = name
@code = ::Amalgalite::SQLite3::Constants::DBStatus.value_from_name( name )
@current = nil
@highwater = nil
@api_db = api_db
end
def current
update!
return @current
end
def highwater
update!
return @highwater
end
#
# reset the given stat's highwater mark. This will also populate the
# _@current_ and _@highwater_ instance variables
#
def reset!
update!( true )
end
end
#
# Top level Status object holding all the Stat objects indicating the DBStatus
# of the SQLite3 C library.
#
class DBStatus
::Amalgalite::SQLite3::Constants::DBStatus.constants.each do |const_name|
method_name = const_name.downcase
module_eval( <<-code, __FILE__, __LINE__ )
def #{method_name}
@#{method_name} ||= Amalgalite::SQLite3::Database::Stat.new( self.api_db, '#{method_name}' )
end
code
end
attr_reader :api_db
def initialize( api_db )
@api_db = api_db
end
end
# return the DBstatus object for the sqlite database
def status
@status ||= DBStatus.new( self )
end
end
end
Version data entries
63 entries across 63 versions & 2 rubygems