RE: Dynamic Java for Excel Spreadsheet

-----Original Message-----
From: java400-l-bounces@xxxxxxxxxxxx [mailto:java400-l-
bounces@xxxxxxxxxxxx] On Behalf Of Holm, Paul
Sent: Friday, September 28, 2012 1:24 PM
To: java400-l@xxxxxxxxxxxx
Subject: Dynamic Java for Excel Spreadsheet

Darren,

If it's a fit for your needs, we have a free utility that can generate

stream it to users via a browser.

http://www.mcpressonline.com/database/tech-tip-create-excel-
spreadsheets-with-ibm-i-data.html

The issues I find when running from RPG are:
1) If writing to IFS, how does the end user easily get access to it.
Mapped drives tend to be clumsy.
2) Prompting, typically only a subset of records are desired, how do you
allow dynamic prompting.
3) Lot of redundent coding

FWIW - We have taken three different approaches to Dynamic Excel:
a) Dynamically generate a raw Excel via web based java and stream to
requestor. Useful when just basic data is desired in Excel format
b) Take a preformatted Excel file and dynamically update the excel data

then stream to user.
c) From Excel, create a WYSIWYG excel complete with excel formatting,
graphs, etc and then use Excel Web Query to pull the db2 data

HTH Thanks, Paul Holm

www.planetJavaInc.com

message: 1

date: Fri, 28 Sep 2012 10:37:56 -0400
from: darren@xxxxxxxxx
subject: Dynamic java for Excel spreadsheet


We have run into various memory and performance issues using the JNI
interface from RPG to Java to generate spreadsheets using the POI
HSSF API's. Sometimes to get around this, we generate the
spreadsheet in a

.CSV

format, but this obviously generates a pretty ugly output when
imported into Excel. I'm currently researching generating the java
code

dynamically

in an RPG program, compiling it, and running that, meaning that the
there would be at least one java code source record for every cell
on the spreadsheet. I believe that the resulting program would
perform much better than the JNI interface does. Does anyone see
any show stoppers

with

this approach? Anyone tried something like this before?



-

--
PlanetJ Corporation
Cell: 760-415-8830
www.planetjavainc.com


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

message: 2
date: Fri, 28 Sep 2012 12:03:25 -0400
from: Charles Wilt <charles.wilt@xxxxxxxxx>
subject: Re: Dynamic java for Excel spreadsheet

Why not take RPG out completely and just have a pre-written Java
program build the spreadsheets?

Charles

On Fri, Sep 28, 2012 at 10:37 AM, <darren@xxxxxxxxx> wrote:

We have run into various memory and performance issues using the JNI
interface from RPG to Java to generate spreadsheets using the POI
HSSF API's. Sometimes to get around this, we generate the
spreadsheet in a

.CSV

format, but this obviously generates a pretty ugly output when
imported into Excel. I'm currently researching generating the java
code

dynamically

in an RPG program, compiling it, and running that, meaning that the
there would be at least one java code source record for every cell
on the spreadsheet. I believe that the resulting program would
perform much better than the JNI interface does. Does anyone see
any show stoppers

with

this approach? Anyone tried something like this before?

--
This is the Java Programming on and around the IBM i (JAVA400-L)
mailing

list

To post a message email: JAVA400-L@xxxxxxxxxxxx To subscribe,
unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/java400-l
or email: JAVA400-L-request@xxxxxxxxxxxx Before posting, please take
a moment to review the archives at
http://archive.midrange.com/java400-l.

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

message: 3
date: Fri, 28 Sep 2012 12:39:31 -0400
from: darren@xxxxxxxxx
subject: Re: Dynamic java for Excel spreadsheet

There are a lot of reasons this would be difficult. My thought was to
create a service program to write the Java code to prevent a lot of
the downsides to converting code and developers to pure Java.





From: Charles Wilt <charles.wilt@xxxxxxxxx>
To: Java Programming on and around the IBM i
<java400-l@xxxxxxxxxxxx>,
Date: 09/28/2012 12:03 PM
Subject: Re: Dynamic java for Excel spreadsheet
Sent by: java400-l-bounces@xxxxxxxxxxxx



Why not take RPG out completely and just have a pre-written Java
program build the spreadsheets?

Charles

On Fri, Sep 28, 2012 at 10:37 AM, <darren@xxxxxxxxx> wrote:

We have run into various memory and performance issues using the JNI
interface from RPG to Java to generate spreadsheets using the POI
HSSF API's. Sometimes to get around this, we generate the
spreadsheet in

a .CSV

format, but this obviously generates a pretty ugly output when
imported into Excel. I'm currently researching generating the java
code

dynamically

in an RPG program, compiling it, and running that, meaning that the
there would be at least one java code source record for every cell
on the spreadsheet. I believe that the resulting program would
perform much better than the JNI interface does. Does anyone see
any show stoppers

with

this approach? Anyone tried something like this before?

--
This is the Java Programming on and around the IBM i (JAVA400-L)
mailing

list

To post a message email: JAVA400-L@xxxxxxxxxxxx To subscribe,
unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/java400-l
or email: JAVA400-L-request@xxxxxxxxxxxx Before posting, please take
a moment to review the archives at
http://archive.midrange.com/java400-l.

--
This is the Java Programming on and around the IBM i (JAVA400-L)
mailing list To post a message email: JAVA400-L@xxxxxxxxxxxx To
subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/java400-l
or email: JAVA400-L-request@xxxxxxxxxxxx Before posting, please take a
moment to review the archives at
http://archive.midrange.com/java400-l.





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

message: 4
date: Fri, 28 Sep 2012 11:57:53 -0500
from: "Theis, John (Information Technology)"
<John.Theis@xxxxxxxxxxxxxxxx>
subject: RE: Dynamic java for Excel spreadsheet

Write the java program using POI to wait on a data queue to get its
requests from. Then all the RPG programmers have to know how to do is
put an SQL string on a data queue. You'll probably want to pass other
parameters through the data queue, like the output file destination or
the email address to deliver it to.

-----Original Message-----
From: java400-l-bounces@xxxxxxxxxxxx [mailto:
java400-l-bounces@xxxxxxxxxxxx] On Behalf Of darren@xxxxxxxxx
Sent: Friday, September 28, 2012 11:40 AM
To: Java Programming on and around the IBM i
Subject: Re: Dynamic java for Excel spreadsheet

There are a lot of reasons this would be difficult. My thought was to
create a service program to write the Java code to prevent a lot of
the downsides to converting code and developers to pure Java.





From: Charles Wilt <charles.wilt@xxxxxxxxx>
To: Java Programming on and around the IBM i
<java400-l@xxxxxxxxxxxx>,
Date: 09/28/2012 12:03 PM
Subject: Re: Dynamic java for Excel spreadsheet
Sent by: java400-l-bounces@xxxxxxxxxxxx



Why not take RPG out completely and just have a pre-written Java
program build the spreadsheets?

Charles

On Fri, Sep 28, 2012 at 10:37 AM, <darren@xxxxxxxxx> wrote:

We have run into various memory and performance issues using the JNI
interface from RPG to Java to generate spreadsheets using the POI
HSSF API's. Sometimes to get around this, we generate the
spreadsheet in

a .CSV

format, but this obviously generates a pretty ugly output when
imported into Excel. I'm currently researching generating the java
code

dynamically

in an RPG program, compiling it, and running that, meaning that the
there would be at least one java code source record for every cell
on the spreadsheet. I believe that the resulting program would
perform much better than the JNI interface does. Does anyone see
any show stoppers

with

this approach? Anyone tried something like this before?

--
This is the Java Programming on and around the IBM i (JAVA400-L)
mailing

list

To post a message email: JAVA400-L@xxxxxxxxxxxx To subscribe,
unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/java400-l
or email: JAVA400-L-request@xxxxxxxxxxxx Before posting, please take
a moment to review the archives at
http://archive.midrange.com/java400-l.

--
This is the Java Programming on and around the IBM i (JAVA400-L)
mailing list To post a message email: JAVA400-L@xxxxxxxxxxxx To
subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/java400-l
or email: JAVA400-L-request@xxxxxxxxxxxx Before posting, please take a
moment to review the archives at http://archive.midrange.com/java400-l.



--
This is the Java Programming on and around the IBM i (JAVA400-L)
mailing list To post a message email: JAVA400-L@xxxxxxxxxxxx To
subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/java400-l
or email: JAVA400-L-request@xxxxxxxxxxxx Before posting, please take a
moment to review the archives at http://archive.midrange.com/java400-l.



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

--
This is the Java Programming on and around the IBM i (JAVA400-L)
digest list To post a message email: JAVA400-L@xxxxxxxxxxxx To
subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/java400-l
or email: JAVA400-L-request@xxxxxxxxxxxx Before posting, please take a
moment to review the archives at
http://archive.midrange.com/java400-l.



End of JAVA400-L Digest, Vol 10, Issue 82
*****************************************

--
PlanetJ Corporation
Cell: 760-415-8830
www.planetjavainc.com
--
This is the Java Programming on and around the IBM i (JAVA400-L) mailing

To post a message email: JAVA400-L@xxxxxxxxxxxx To subscribe,
unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/java400-l
or email: JAVA400-L-request@xxxxxxxxxxxx Before posting, please take a
moment to review the archives at http://archive.midrange.com/java400-l.