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Legacy Connectivity

 
Pavan Sethurathnam
Greenhorn
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Any info on Legacy Connectivity...
 
Kartik Shah
Ranch Hand
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As far as the Legacy connectivity support is concerned with J2EE
You can achieve it with writing your own J2EE Connector.
Bunch of information is available here http://java.sun.com/j2ee/connector/
However, most of the commercial project uses middleware products like
TIBCO They provide their custom connectors library which you can use to write on both side(your application side as well as legacy side for communication)
Site for this is www.tibco.com
 
Ajith Kallambella
Sheriff
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How about using flatware like XML? Since the parser support will soon become standard across different vendors, I think this technology will offer the least expensive solution.
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Ajith Kallambella M.
Sun Certified Programmer for the Java�2 Platform.
IBM Certified Developer - XML and Related Technologies, V1.
 
John Davis
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You can't use flatware technology like XML alone, because you will be left then without a transport layer.
My favorite solution is to use MQSeries Java API coded either into the servlet or into a session bean. In this architecture, IBM provides the process architecture and supports asynchronous messaging across platforms, and for the legacy platform, a very simple Cobol program can be provided to 1. dequeue requests 2. link to CICS/DB2 etc. 3. queue replies for the waiting servlet/EJB. My experience with this architecture displays very fast time-to-market for the application, excellent performance (approx 200 ms turnaround for CICS/DB2 operations) and excellent availability (via redundant MQSeries queue managers.
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