Add around methods to Logger. Closes #3809

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3670 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activesupport/CHANGELOG

 *SVN*
 
+* Add 'around' methods to Logger,  to make it easy to log before and after messages for a given block as requested in #3809. [Michael Koziarski]  Example:
+
+  logger.around_info("Start rendering component (#{options.inspect}): ", 
+                     "\n\nEnd of component rendering") { yield }
+
 * Added Time#beginning_of_quarter #3607 [cohen.jeff@gmail.com]
 
 * Fix Object.subclasses_of to only return currently defined objects [Jonathan Viney <jonathan@bluewire.net.nz>]

activesupport/lib/active_support/core_ext/logger.rb

+# Adds the 'around_level' method to Logger.
+
+class Logger
+  def self.define_around_helper(level)
+    module_eval <<-end_eval
+      def around_#{level}(before_message, after_message, &block)
+        self.#{level}(before_message)
+        return_value = block.call(self)
+        self.#{level}(after_message)
+        return return_value
+      end
+    end_eval
+  end
+  [:debug, :info, :error, :fatal].each {|level| define_around_helper(level) }
+
+end
\ No newline at end of file