Posted By

esad on 11/26/07


mysql rails activerecord monkeypatch

Versions (?)

Who likes this?

2 people have marked this snippet as a favorite


A monkey-patch to activerecord to reconnect after it loses the connection to the mysql server

 / Published in: Ruby

  1. # Patch Mysql adapter so that it reconnects after discovering an lost connection error
  3. module ActiveRecord::ConnectionAdapters
  4. class MysqlAdapter
  5. alias :orig_execute :execute
  6. def execute(sql,name=nil)
  7. orig_execute(sql,name)
  8. rescue ActiveRecord::StatementInvalid => exception
  9. if LOST_CONNECTION_ERROR_MESSAGES.any? { |msg| exception.message. =~ /#{msg}/ }
  10. reconnect!
  11. retry
  12. else
  13. raise
  14. end
  15. end
  16. end
  17. end

Report this snippet  


RSS Icon Subscribe to comments
Posted By: fjfish on December 8, 2008

Just one thing:

You might want to try maybe 3 times and then pass the exception up anyway, if the database really has gone away this will sit there looping forever. Usually I also wait a second or so before retrying something like this, but this might not be that good an idea if you're trying to respond to an http request.

You need to login to post a comment.