if no reactor use synch query

lib/mysql2/em.rb

@@ -23,10 +23,14 @@ module Mysql2
       end
 
       def query(sql, opts={})
+        if ::EM.reactor_running?
           super(sql, opts.merge(:async => true))
           deferable = ::EM::DefaultDeferrable.new
           ::EM.watch(self.socket, Watcher, self, deferable).notify_readable = true
           deferable
+        else
+          super(sql, opts)
+        end
       end
     end
   end

lib/mysql2/em_fiber.rb

@@ -1,13 +1,14 @@
 # encoding: utf-8
 
 require 'mysql2/em'
-require 'fiber' unless defined? Fiber
+require 'fiber'
 
 module Mysql2
   module EM
     module Fiber
       class Client < ::Mysql2::EM::Client
         def query(sql, opts={})
+          if ::EM.reactor_running?
             deferable = super(sql, opts)
 
             fiber = ::Fiber.current
@@ -15,9 +16,13 @@ module Mysql2
               fiber.resume(result)
             end
             deferable.errback do |err|
+              p err
               fiber.resume(err)
             end
             ::Fiber.yield
+          else
+            super(sql, opts)
+          end
         end
       end
     end