avoid relying on exceptions for list_keys

This will make debug output quieter.

1 files changed, 4 insertions, 6 deletions

diff --git a/lib/mogilefs/mogilefs.rb b/lib/mogilefs/mogilefs.rb
index 1ec357d..819f69a 100644
--- a/lib/mogilefs/mogilefs.rb
+++ b/lib/mogilefs/mogilefs.rb
@@ -268,12 +268,10 @@ class MogileFS::MogileFS < MogileFS::Client
     @backend.respond_to?(:_list_keys) and
       return @backend._list_keys(domain, prefix, after, limit, &block)
 
-    begin
-      res = @backend.list_keys(:domain => domain, :prefix => prefix,
-                               :after => after, :limit => limit)
-    rescue MogileFS::Backend::NoneMatchError
-      return
-    end
+    res = @backend.list_keys(:domain => domain, :prefix => prefix,
+                             :after => after, :limit => limit,
+                             :ruby_no_raise => true)
+    MogileFS::Backend::NoneMatchError === res and return
 
     keys = (1..res['key_count'].to_i).map { |i| res["key_#{i}"] }
     if block