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Contents
module DataMapper
module Is
module StateMachine
# State DSL (Domain Specific Language)
module StateDsl
# Define a state of the system.
#
# Example:
#
# class TrafficLight
# include DataMapper::Resource
# property :id, Serial
# is :state_machine do
# state :green, :enter => Proc.new { |o| o.log("G") }
# state :yellow, :enter => Proc.new { |o| o.log("Y") }
# state :red, :enter => Proc.new { |o| o.log("R") }
#
# # event definitions go here...
# end
#
# def log(string)
# Merb::Logger.info(string)
# end
# end
def state(name, options = {})
unless state_machine_context?(:is)
raise InvalidContext, "Valid only in 'is :state_machine' block"
end
# ===== Setup context =====
machine = @is_state_machine[:machine]
state = Data::State.new(name, machine, options)
machine.states << state
end
end # StateDsl
end # StateMachine
end # Is
end # DataMapper
Version data entries
25 entries across 25 versions & 2 rubygems