JTA File and SQL Transactions

Question

I am trying to find some examples of how I might use JTA to solve a programming problem. I need the ability to wrap a transaction around two distinct events: a File write and a SQL transaction. I have a file that needs to be copied to a particular place and a corresponding SQL update statement to be executed. If either fails, I need to be able to rollback both events.
I have tried to use the free Astrel IO Atomic, but it appears to be buggy. The Apache Transaction package almost works, but it only support File IO on the same drive. I was hoping that I could find some examples on how I might implement my own transaction.
Thanks

Answer 1

You need to force sqlplus to exit with an non-zero return code. All processes upon termination, return an exit code to the operating system. This allows it to inform other processes of its exit state - e.g. successful, failed, partially successful with warnings, etc. On most operating systems the exit code is a byte int value, ranging from 0 to 255.
In Windows console scripts, you can user the ERRORLEVEL variable to view the last process's exit code.
So.. you get sqlplus to exit with a 1 (usually means fail) and not a 0 (usually means successful) and then test the exit code using ERRORLEVEL.
Have a look at SQL*Plus command "+WHENEVER SQLERROR"+ to force an exit with an error exit code.
In your Windows console, use the HELP command for how the IF command and ERRORLEVEL variable works.
Sorry - no Windows here so I cannot be more specific with an example.. (in Linux the approach is exactly the same, except the variable +$?+ is used in scripts for the exit code)