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Contents
module Hyperloop
# Allows interactive systems to reset context to the state at boot. Any
# modules or classes that set context instance variables to hold things like
# call backs should use Hyperloop::Context.set_var(self, :@var_name) { .... }
# the provided block will be rerun and the instance variable re-initialized
# when the reset! method is called
module Context
# Replace @foo ||= ... with
# Context.set_var(self, :@foo) { ... }
# If reset! has been called then the instance variable will be record, and
# will be reset on the next call to reset!
# If you want to record the current value of the instance variable then set
# force to true.
def self.set_var(ctx, var, force: nil)
inst_value_b4 = ctx.instance_variable_get(var)
if @context && !@context[ctx].key?(var) && (force || !inst_value_b4)
@context[ctx][var] = (inst_value_b4 && inst_value_b4.dup)
end
inst_value_b4 || ctx.instance_variable_set(var, yield)
end
def self.reset!(reboot = true)
# if @context is already initialized then reset all the instance
# vars using their corresponding blocks. Otherwise initialize
# @context.
if @context
@context.each do |ctx, vars|
vars.each { |var, init| ctx.instance_variable_set(var, init) }
end
Hyperloop::Application::Boot.run if reboot
else
@context = Hash.new { |h, k| h[k] = {} }
end
end
end
end
Version data entries
20 entries across 20 versions & 1 rubygems