AW: EOFW not resume

[Werner Noll <werner.noll@xxxxxxxxx>]

Hi,

when you use EOFW processing (by overriding the file with an EOFDLY value),
the read operation stops, when EOF is reached and waits for the specified
interval time, until it continues with the next statement after the read.
When the read is waiting, the internal file pointer has reached EOF. This
will not be affected, if a data change occurs in previous records. The file
pointer remains at EOF. I never tried to use %eof in this case and I doubt
about it's effect.
What we have done in such cases is, we delete the changed record in the LF
and write it (changed) again into the file. Then the read occurs for the
"new" record.

Regards,
Werner Noll    

-----Ursprüngliche Nachricht-----
Von: Michael [mailto:mckhmail-web@xxxxxxxxxxxx]
Gesendet: Montag, 29. November 2004 03:43
An: rpg400-l@xxxxxxxxxxxx
Betreff: EOFW not resume


Background:
===========

*** Physical file
contains record with different status (e.g. OS, ER, SD...).

*** Logical file
selects only records which status='OS' from the physical file.

*** RPG program
monitors logical file for records status='OS' continuously.  I am
using EOFW for this purpose.

Code:
=====
C*  Read the logical file GWRQCTL1
C                   READ      GWRQCTL1                      
C                   DOW       NOT %EOF(GWRQCTL1)            
C*
C*  Handle special record used to terminate the program
C                   IF        GCWFRF = *ALL'Z'              
C                   DELETE    GWRQCTL1 
C                   FEOD      GWRQCTL1 
C*
C*  Handle record which status='OS'
C                   ELSE                                    
C*  do something ...
C                   ENDIF
C*
C                   READ      GWRQCTL1  
C                   ENDDO               

Question:
=========
The RPG program resume from EOFW when I insert a new record into the
physical file which status='OS'.  But the problem is that, the
program does not resume when I change the status of an existing
record from other values to 'OS'.

In the view of the logical file, there is a new record if a message's
status is changed from other values to 'OS' in the physical file.

Any mistake in my method?  Any method to fix it?  Thank you!


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