module Coolio::Meta
Public Instance Methods
event_callback(*methods)
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Define callbacks whose behavior can be changed on-the-fly per instance. This is done by giving a block to the callback method, which is captured as a proc and stored for later. If the method is called without a block, the stored block is executed if present, otherwise it's a noop.
# File lib/cool.io/meta.rb, line 32 def event_callback(*methods) methods.each do |method| module_eval <<-EOD def #{method}(*args, &block) if block @#{method}_callback = block return end if defined? @#{method}_callback and @#{method}_callback instance_exec(*args, &@#{method}_callback) end end EOD end end
watcher_delegate(proxy_var)
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Use an alternate watcher with the attach/detach/enable/disable methods if it is presently assigned. This is useful if you are waiting for an event to occur before the current watcher can be used in earnest, such as making an outgoing TCP connection.
# File lib/cool.io/meta.rb, line 13 def watcher_delegate(proxy_var) %w{attach attached? detach enable disable}.each do |method| module_eval <<-EOD def #{method}(*args) if defined? #{proxy_var} and #{proxy_var} #{proxy_var}.#{method}(*args) return self end super end EOD end end