Merge pull request #23 from halorgium/interests-in-exception

Add the existing monitor interests to the exception
socketry · Apr 19, 2013 · 7aa8133 · 7aa8133
2 parents 7421c06 + e369603
commit 7aa8133
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/lib/nio/selector.rb b/lib/nio/selector.rb
@@ -18,7 +18,9 @@ def initialize
     # * :rw - is the IO either readable or writeable?
     def register(io, interest)
       @lock.synchronize do
-        raise ArgumentError, "this IO is already registered with the selector" if @selectables[io]
+        if monitor = @selectables[io]
+          raise ArgumentError, "this IO is already registered with the selector as #{monitor.interests.inspect}"
+        end
 
         monitor = Monitor.new(io, interest, self)
         @selectables[io] = monitor