Java run by MySQL trigger

Question

I am trying to create some MySQL code that will invoke a Java program from a trigger.

Here is what I have so far:

CREATE TRIGGER trig_name after inse         


        

Answer 1

Though not a standard feature this is very well possible with MySQL. You can use the SELECT .. INTO OUTFILE statement from inside the trigger to write to a named pipe (Windows) or memroy filesystem (Linux). Both of those can easily be monitored from Java code (or any other code for that matter). Using this technique you will avoid polling and because no actual disk access takes place either you will have good performance.

I have written a Java package for this actually so I'm 100% sure it is possible and performs well. Unfortunately I am not allowed to share my efforts here (my previous answer was deleted by a moderator) so you will have to code it yourself, sorry.