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# File 'lib/traceable.rb', line 3
def self.included(mod)
mod.module_eval do
def output_trace_msg(msg)
logdev = respond_to?(:logger) ? logger : $stderr
if logdev.respond_to?(:debug)
logdev.debug(msg)
elsif logdev.respond_to?(:puts)
logdev.puts(msg)
else
logdev << msg
end
end
def self.trace(*method_names)
method_names.each { |method_name|
unless self.instance_methods.include?("__TRACE_#{method_name.to_s}__")
self.class_eval do
alias_method :"__TRACE_#{method_name.to_s}__", method_name
define_method method_name do |*args, &block|
output_trace_msg("TRACE : #{method_name}(#{args.collect { |a| a.inspect }.join(',')})")
result = self.send(:"__TRACE_#{method_name.to_s}__", *args, &block)
output_trace_msg("RESULT: #{result.inspect}")
result
end
end
end
}
end
def self.untrace(*method_names)
method_names.each { |method_name|
if self.instance_methods.include?("__TRACE_#{method_name.to_s}__")
self.class_eval do
alias_method method_name, :"__TRACE_#{method_name.to_s}__"
undef_method :"__TRACE_#{method_name.to_s}__"
end
end
}
end
end
end
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