Re: Pushing XML out to a browser request

Here's more detailed info about what we are doing. Agree that 1s seems
pretty fast, but dealership based users were getting 0.1s response time
with direct SQL hits so they will notice - and according to the web team -
complain. So we are trying to speed things up as much as possible. What
the end users are not understanding is that we are sending more data back
now than we were with the direct SQL. Plus - I do NOT want to continue to
direct SQL. It makes the applications too tightly coupled.

This is how we generate the XML.
First, this is the relationships of the tables involved. It’s similar to
an indented bill of material, where many records may be nested within a
parent.

Basically, we read the Header and begin building a string of text like
this.
@Xml = %Trim(@Xml)
+'<Claim>'
+'<Header>'
+'<ClaimNo>' + %Editc(Cmclm:'X') + '</ClaimNo>'
+'<ProdPlant><![CDATA[' + %Trim(Cmplnt) + ']]></ProdPlant>'
+'<ClaimType><![CDATA[' + %Trim(@ClaimType) + ']]></ClaimType>'
+'<ProcPlant><![CDATA[' + %Trim(Cmpplt) + ']]></ProcPlant>'
+'<RecStatus><![CDATA[' + %Trim(Cmrcst) + ']]></RecStatus>'

We continue processing all the “child” records and continue building the
string as above.
After the XML “string” is complete we insert it into a work file as a CLOB
data type that is returned to a stored procedure.




From: Henrik Rützou <hr@xxxxxxxxxxxx>
To: "RPG programming on the IBM i (AS/400 and iSeries)"
<rpg400-l@xxxxxxxxxxxx>,
Date: 10/02/2013 04:00 PM
Subject: Re: Pushing XML out to a browser request
Sent by: rpg400-l-bounces@xxxxxxxxxxxx



It all depends ...

I have SQL REST based CGI services that generates XML in 0.02-0.04 seconds
on the server,
the roundtrip on the external internet browser is about 71 ms


On Wed, Oct 2, 2013 at 9:36 PM, Richard Schoen
<richard@xxxxxxxxxxxxxxx>wrote:

One second doesn't seem to be bad for response time.

If you're writing to a DB and they are reading it maybe all the channels
are slowing it down a little.

Would have to know more about the plumbing sequence but it sounds like
you're writing to a DB entry and then they are reading it ?

Why not create an RPG based XML URL requestor instead so the XML

response

is immediate to the java app from the HTTP call to the RPG app. No DB or
clob interaction needed.

Then again I don't know the app architecture and 1 second response

sounds

good to me :-)

Regards,
Richard Schoen
RJS Software Systems Inc.
Where Information Meets Innovation
Document Management, Workflow, Report Delivery, Forms and Business
Intelligence
Email: richard@xxxxxxxxxxxxxxx
Web Site: http://www.rjssoftware.com
Tel: (952) 736-5800
Fax: (952) 736-5801
Toll Free: (888) RJSSOFT

------------------------------

message: 4
date: Wed, 2 Oct 2013 14:44:20 -0400
from: Tim Wright <Tim.Wright@xxxxxxxxxxxxxxxxxxxxxx>
subject: Pushing XML out to a browser request

In a nutshell, we have a back end home grown RPG ERP system with a J2EE
based dealer extranet on top. Part of the function of the dealer

interface

is the management of warranty claims. The browser requests claim
information from the back end and the back end produces an XML document

in

return. This works great - except - our web comrades complain that it

takes

over a full second to get the XML back. They do direct SQL hits to the

DB

and get results in a tenth of the time - so they complain. Do you know

of

anyone who has struggled with response time related to creating XML via

RPG

and passing it back to a web interface? We don't know where the

bottleneck

is. It might be on the browser side, but we can't seem to isolate it.

If anyone has insight about this, I can provide more details to help you
answer.

Many thanks!

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