SQLServer: active? and reconnect! methods for handling stale connections. References #428.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3045 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

 *SVN*
 
-* SQLServer: active? and reconnect! methods for handling stale connections.  #428 [kajism@yahoo.com]
+* SQLServer: active? and reconnect! methods for handling stale connections.  #428 [kajism@yahoo.com, Tom Ward <tom@popdog.net>]
 
 * Associations handle case-equality more consistently: item.parts.is_a?(Array) and item.parts === Array.  #1345 [MarkusQ@reality.com]
 

activerecord/lib/active_record/connection_adapters/sqlserver_adapter.rb

@@ -207,24 +207,21 @@ def supports_migrations? #:nodoc:
 
       # Returns true if the connection is active.
       def active?
-        @connection.execute("SELECT 1") {|sth|}
+        @connection.execute("SELECT 1") { }
         true
-      rescue DBI::DatabaseError => e
+      rescue DBI::DatabaseError, DBI::InterfaceError
         false
       end
 
-      # Reconnects to the database.
+      # Reconnects to the database, returns false if no connection could be made.
       def reconnect!
-        begin
-          @connection.disconnect
-          @connection = DBI.connect(*@connection_options)
-        rescue DBI::DatabaseError => e
-          @logger.warn "#{adapter_name} automatic reconnection failed: #{e.message}"
-        end
+        @connection.disconnect rescue nil
+        @connection = DBI.connect(*@connection_options)
+      rescue DBI::DatabaseError => e
+        @logger.warn "#{adapter_name} reconnection failed: #{e.message}" if @logger
+        false
       end
 
-
-
       def select_all(sql, name = nil)
         select(sql, name)
       end