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| Best way to call IMS or CICS transactions |
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| JosephGramig |
 Posted: Tue Sep 16, 2014 10:14 am Post subject: Best way to call IMS or CICS transactions |
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Grand Master
Joined: 09 Feb 2006
Posts: 1244
Location: Gold Coast of Florida, USA
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So, I see there are several ways to call IMS and CICS transaction:
- IMS/CICS bridge programs
- IMS/CICS Broker nodes (if you have WMB/IIB)
- WAS has a RAD wizard to help you make the call
- DataPower can do it too (have not looked at this one but I have it too)
I'm sure there are others I have not mentioned.
What is the best way? I know, it depends...
Say it is invoked with an MQ msg vs a Web Service call?
I'm not familiar with the XCF values on the STGCLASS. Do those only go with the bridge programs? KC was not all that clear. This document Troubleshooting the WebSphere MQ for z/OS IMS gives a clue to how it works.
I think the WMB IMSnode directly talks to OTMA (like WAS and DataPower). So, is it better to always go through Broker when using MQ? Is there an advantage to Broker on z/OS?
For those programs that are using the MQ IMS Bridge, do they build the whole message in CCSID 500 including the IIH? It looks like they do... |
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| PeterPotkay |
| Posted: Tue Sep 16, 2014 2:33 pm Post subject: Re: Best way to call IMS or CICS transactions |
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Poobah
Joined: 15 May 2001
Posts: 7722
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| JosephGramig wrote: |
For those programs that are using the MQ IMS Bridge, do they build the whole message in CCSID 500 including the IIH? It looks like they do... |
Oh the fun I had with that topic.
See this post:
http://www.mqseries.net/phpBB2/viewtopic.php?p=356529#356529
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Peter Potkay
Keep Calm and MQ On |
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| PeterPotkay |
| Posted: Tue Sep 16, 2014 2:49 pm Post subject: Re: Best way to call IMS or CICS transactions |
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Poobah
Joined: 15 May 2001
Posts: 7722
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| JosephGramig wrote: |
So, I see there are several ways to call IMS and CICS transaction:
- IMS/CICS bridge programs
- IMS/CICS Broker nodes (if you have WMB/IIB)
- WAS has a RAD wizard to help you make the call
- DataPower can do it too (have not looked at this one but I have it too)
I'm sure there are others I have not mentioned.
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Plain MQ message to a MQ triggered queue is another way. The IMS application must then be MQ aware, making MQ API calls. That could be desirable....or impossible.
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Peter Potkay
Keep Calm and MQ On |
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| bruce2359 |
| Posted: Tue Sep 16, 2014 3:10 pm Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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Yes, it depends. Is the CICS or IMS app a 3270-terminal driven app? If so, the bridge. If the CICS or IMS app exists, and is not MQ-aware, then the bridge makes simple sense. An outboard app creates the 3270 flows put into messages. These flows 'simulate' the 3270 terminal device interaction. The 3270 bridge gets the message from the bridge queue, then invokes the transaction as if it were a human-interaction.
If the app can be modified to be MQ-aware, then do that.
If the CICS app is invoked by passing it a COMMAREA (not 3270-terminal driven), then use the DPL bridge.
I yield to IMS experts to provide those details.
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| PeterPotkay |
| Posted: Wed Sep 17, 2014 3:25 pm Post subject: |
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