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MQSeries.net Forum Index » Mainframe, CICS, TXSeries » Two-Phase commit on S/390 under CICS

Two-Phase commit on S/390 under CICS

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naylak

Posted: Tue Sep 30, 2003 4:50 am Post subject: Two-Phase commit on S/390 under CICS

Apprentice

Joined: 08 Feb 2003
Posts: 47

After I got replies for the above in my previous posts I have explored on it and now ready for building a sample code in java. Can anyone give a sample code in java implementing two-phase commit on S/390 under CICS involving DB2 and MQseries transactions.

Thanks in advance

naylak

mgrabinski

Posted: Wed Oct 01, 2003 9:24 pm Post subject:

Master

Joined: 16 Oct 2001
Posts: 246
Location: Katowice, Poland

A Java program won't run under CICS on z/OS.
Write it in C/COBOL/PL1/Assembler
_________________
Marcin Grabinski <><

naylak

Posted: Fri Oct 17, 2003 8:18 am Post subject:

Apprentice

Joined: 08 Feb 2003
Posts: 47

As far as my knowledge goes I can access CICS services from java using JCICS. Correct me if I am wrong.

Thanks and regards
naylak

fwg

Posted: Mon Nov 24, 2003 2:54 pm Post subject:

Newbie

Joined: 24 Nov 2003
Posts: 2
Location: Germany

While not being a JAVA specialist, I think/hope the following points to correspond to facts:

CICS/TS V2 supports JAVA applications. Select CICS/TS V2R2 or higher to be at the secure side for JAVA support under CICS/TS

Any CICS applications ( including JAVA applications running on a JVM in CICS ) have the 1PC else 2PC protocol available as an automatically used environment feature. The commit protocol is a 2PC if beneath CICS more than 1 ResourceManager like DB2 is involved ( as in Your case are DB2 and MQS ) and the transaction does recoverable updates ( as e.g. MQGET or SQL INSERT ... )

[ the switch between 1PC and 2PC is (usually) done by CICS automatically, CICS acts as the "Coordinator" in the 2PC Szenario ]

If You wish to use "transactional api" explicitly in Your CICS JAVA application, use ( there should be available) JCICS classes corresponding to the "EXEC CICS SYNCPOINT", else "EXEC CICS SYNCPOINT ROLLBACK" procedural calls

Regards
fwg

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