Re: Trigger program - open / close file question

On Tue, Dec 16, 2008 at 3:08 PM, Brown, Stephen GRNRC <
Stephen.Brown@xxxxxxxxx> wrote:

Opening and closing CTRfile1 in trigger will resolve the issue in this
instance as PGM1 then tries to open CTRfile itself and should be
successful. But will this work in calling pgms that the CTRFile is not
USROPN, i.e if closing in trigger will this also close file to calling
pgm. I don't think it does but I'm having a moment of doubt.

The CLOSE opcode would only effect the trigger program.

But you really don't want to OPEN/CLOSE the file in the trigger each time.
That will kill your performance.

With the file defined SHARE(*YES), it is up to the application to make sure
that the file is opened for update by the first program to open it if _any_
program may need to open it for update.

Your trigger program is effectively the first, since the prior program
closed the file, thus your trigger need to open the file for update. Since
it doesn't need to update anything, just make sure it does all input with
(n) so that the records won't be locked.

Otherwise, you need to ensure that some other program which does open the
file for update, opens the file and leaves it open before your trigger
program is called.

Charles