Re: JAVA400-L Digest, Vol 3, Issue 17

[murali dhar <hydchap1@xxxxxxxxx>]

We use a proxy that uses pure sql requests and have the option of using proxy 
files which uses introspection to determine AS400 file description so there 
fore its truly platform independent..

Franco Biaggi <fbiaggi@xxxxxxxxxx> wrote:Hello,
I do not undertand,
we are runnig apps. on win32, linux, OS/400 (QSH) with the same 
jt400.jar and do not see any problem (???)

murali dhar wrote:

>Joe/Paul,
>I agree Java is write once and run anywhere but if you write a Java 
>application with JT400 classes to read/write from 400 files and run it on the 
>AS400 it will work fine,but next week if you want to run the same code on a 
>UNIX, it wont work because the concept of AS400 objects is not known to other 
>boxes.
>Regards,
> 
>
>
>Paul Holm 
wrote:
>Murali,
>
>>From my interpretation of your issues:
>
>a. As Joe points, out JT400 will run on any java enabled platform.
>b. If you want database independence, use of the jt400.jar JDBC driver only
>will enable that. What we typically do is externalize the JDBC connection
>URL and driver reference in initial parms so that they can be set without
>code change. I.E. Your application is config at runtime with the JDBC
>driver and connection URL to use; your classpath includes all JDBC driver
>jar files that you will use. This enabled database independence while using
>jt400.
>c. The remote JDBC Driver will be somewhat slower than native because of the
>network overhead however the difference is not that big.
>a. DB Optimization can be critical. Are the correct access paths and
>indexes there?
>b. Do you optimally set the jdbc jt400 properties? Extended dynamic,
>package cache, etc?
>i.
>http://publib.boulder.ibm.com/pubs/html/as400/v4r5/ic2924/index.htm?info/jav
>a/rzahh/jdbcprop.htm
>HTH
>
>Thanks, Paul Holm
>
>Business: 760-432-0600 Home: 760-432-6550
>Cell: 760-415-8830
>PlanetJ - Makers of WOW (AKA... WebSphere on Steroids)
>
>
>
>-----Original Message-----
>From: java400-l-bounces@xxxxxxxxxxxx
>[mailto:java400-l-bounces@xxxxxxxxxxxx]On Behalf Of
>java400-l-request@xxxxxxxxxxxx
>Sent: Monday, January 10, 2005 10:02 AM
>To: java400-l@xxxxxxxxxxxx
>Subject: JAVA400-L Digest, Vol 3, Issue 17
>
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>Today's Topics:
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>1. RE: java-qtemp (Joe Pluta)
>
>
>----------------------------------------------------------------------
>
>message: 1
>date: Mon, 10 Jan 2005 10:46:09 -0600
>from: "Joe Pluta" 
>subject: RE: java-qtemp
>
> 
>
>>From: murali dhar
>>
>>Hi Joe,
>>we are not using JT400 as it is specific to AS400,any java code we
>> 
>>
>write
> 
>
>>on the AS400 needs to be platform independent,Using JT400 we can never
>>freely port Java code to run on Unix.
>> 
>>
>
>This makes no sense to me. You're trying to use QTEMP, but you say that
>JT400 is platform specific. There is nothing platform specific about
>JT400, it runs on any platform. If you want your back end to be
>platform specific as well, you use a factory class and generate a
>different access object for each platform.
>
>Joe
>
>
>
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Franco Biaggi
CH-6807 Taverne

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