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Conference rdgeng::cics_technical

Title:	Discussion of CICS technical issues

Moderator:	IOSG::SMITHF

Created:	Mon Mar 13 1995
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	192
Total number of notes:	680

172.0. "Object Broker and CICS" by TRN02::FORMIA () Mon Feb 24 1997 16:27

    
    Hello,
    
    I'm working on a Broker platform based on our Object Broker product,
    
    now I have to move from and to a CICS transport to reach Host
    environment based on IBM with IDMS.
    
    Object Broker API are based on socket TCP transport;
    do you see any problem to link OBB API into a C CICS transaction?
    
    thanks in advance,
    
    Marino Formia

T.R Title User Personal
Name Date Lines

172.1 Should work but be careful.. MUFFIT::gerry Gerry Reilly Tue Feb 25 1997 20:05 17

T.R	Title	User	Personal Name	Date	Lines
172.1	Should work but be careful..	MUFFIT::gerry	Gerry Reilly	`Tue Feb 25 1997 20:05`	17
	You hould be safe calling the ObjectBroker API from inside a CICS C Transaction provided that you (and the API call!) obey the documented restriction on what system calls can be made from inside a transaction. You need to pay attention to making sure that the transaction does end up in a sleep or similar (otherwise you will quickly run out of CICS application servers). Also be careful around resources created by the API call. Consider the impact that say a force purge of the CICS task might have ? As an example thread creation and mutex handling is fairly dangerous. Finally, do not mess with the signal handling code. Installing you own signal handling could modify the behaviour of your CICS system! Good luck! -gerry

You hould be safe calling the ObjectBroker API from inside a CICS
C Transaction provided that you (and the API call!) obey the 
documented restriction on what system calls can be made from inside
a transaction.

You need to pay attention to making sure that the transaction does end
up in a sleep or similar (otherwise you will quickly run out of
CICS application servers).  Also be careful around resources created
by the API call.  Consider the impact that say a force purge of the CICS 
task might have ?  As an example thread creation and mutex handling
is fairly dangerous.  Finally, do not mess with the signal handling
code.  Installing you own signal handling could modify the behaviour
of your CICS system!

Good luck!

-gerry