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Java - MainFrame Connection ARCHITECTURE ?

5 replies on 1 page. Most recent reply: Nov 9, 2010 6:24 AM by Huseyin Bilgen

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Viswanatha Basavalingappa

Posts: 84
Nickname: viswagb
Registered: Nov, 2003

Java - MainFrame Connection ARCHITECTURE ? Posted: Feb 26, 2004 5:30 AM
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Hi All,

Do any one has ARCHITECTURE to read/Add/Edit Mainframe data from a java Application.

Ideas are wellcome...!

Viswa
---------


Stan James

Posts: 4
Nickname: j3
Registered: Feb, 2004

Re: Java - MainFrame Connection ARCHITECTURE ? Posted: Feb 26, 2004 10:14 AM
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That's a pretty broad topic! A lot depends on what kind of mainframe and what kind of communication it supports. I've talked to IBM CICS using APPC/LU6.2, MQ-Series, CICS OS/2, 3270 emulation, IND$FILE transfer, distributed databses and probably a few others I've forgotten.

In all cases, we were able to isolate the mainframe access to a small corner of the system, so the architectural impact on the client was minimal. The system I'm on now has an object persistance API that is identical across SQL and MQ-Series. We hope to extend it to be identical for web services.

Behind the interfaces that implement that API you run rapidly into the big "middleware" area. I'm a fan of MQ-Series, even for synchronous request-response stuff. Many other vendors promise to make mainframe access easy. Attachmate comes to mind right now.

Any of that sound like you areas of interest?

Viswanatha Basavalingappa

Posts: 84
Nickname: viswagb
Registered: Nov, 2003

Re: Java - MainFrame Connection ARCHITECTURE ? Posted: Feb 27, 2004 2:44 AM
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Hi, Stan James , thanks for short info.

I know it is very broad topic to dicsuss.I'm basicaly a Middleware Programmer Using Java Technology and Microsft (COM/DCOM). I wanted to know what are the Interface a Open System can Interact with Mainframe.

1. Can we request a Mainframe as Server request.
2. what formate the information stored in Mainframe.
3. If I want write a Simple thin client which access MainFrame how we can do it..

Thankx in Advance..
Viswa
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Stan James

Posts: 4
Nickname: j3
Registered: Feb, 2004

Re: Java - MainFrame Connection ARCHITECTURE ? Posted: Feb 29, 2004 6:01 PM
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All of those protocols & products I mentioned above treat the mainframe as server. I left out one real obvious one and that is a DB2/UDB driver on your platform that can connect to a mainframe DB2 database making it a giant, fast, reliable, killer great database server.

IBM mainframes use EBCDIC characters. Your middleware will have ASCII-EBCDIC conversion built in somewhere. With messaging and RPC interfaces, I've always been able to make the data all "character format" on the mainframe so a whole structure will go through the conversion in one big chunk. If your mainframe data has packed decimal or binary data, you'll have to do some field-by-field conversion.

Look at Attachmate's Smart Connector product line. They started with all "screen scraping" (did I leave out HLLAPI?) technologies but they have a wide variety of protocols now. They can display 3270 screens as web pages or open up APIs so you can work with individual fields.

http://www.attachmate.com/products/bucket/0,2087,h_Connector+Services_1,00.html

Greg Pringle

Posts: 1
Nickname: gregp2
Registered: Nov, 2004

Re: Java - MainFrame Connection ARCHITECTURE ? Posted: Nov 18, 2004 12:00 PM
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I have used java without any problems for communications. Using a protocol written just for Java. However I noticed you use MS Series for OS/2. This is not available as far as I know. Does anyone know where I can get a copy? I have a copy for Linux but would greatly appreciate an OS/2 copy.

Huseyin Bilgen

Posts: 1
Nickname: hbilgen
Registered: Nov, 2010

Re: Java - MainFrame Connection ARCHITECTURE ? Posted: Nov 9, 2010 6:24 AM
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Hi Stan,
We've a similar scenario. Could you please contact me via hbilgen@gmail.com so we can discuss it deeply?

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