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Contents
module Trailblazer
class Activity
# Generic run-time structures that are built via the DSL.
# Any instance of subclass of End will halt the circuit's execution when hit.
# An End event is a simple structure typically found as the last task invoked
# in an activity. The special behavior is that it
# a) maintains a semantic that is used to further connect that very event
# b) its `End#call` method returns the end instance itself as the signal.
class End
def initialize(semantic:, **options)
@options = options.merge(semantic: semantic)
end
def call(args, **)
return self, args
end
def to_h
@options
end
def to_s
%(#<#{self.class.name} #{@options.collect { |k, v| "#{k}=#{v.inspect}" }.join(" ")}>)
end
alias inspect to_s
end
class Start < End
def call(args, **)
return Activity::Right, args
end
end
class Signal; end
class Right < Signal; end
class Left < Signal; end
# signal: actual signal emitted by the task
# color: the mapping, where this signal will travel to. This can be e.g. Left=>:success. The polarization when building the graph.
# "i am traveling towards :success because ::step said so!"
# semantic: the original "semantic" or role of the signal, such as :success. This usually comes from the activity hosting this output.
Output = Struct.new(:signal, :semantic)
# Builds an {Activity::Output} instance.
def self.Output(signal, semantic)
Output.new(signal, semantic).freeze
end
# Builds an {Activity::End} instance.
def self.End(semantic)
End.new(semantic: semantic)
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems