Re: [Adempiere-tang] Awakenings

[Johan I. <Joh...@ag...>]

Hi Kontro and all adempiereans,

I am new to adempiere and a little knowledge on erp..
I have downloaded the whole svn project, and I'm planning to start =
compiling and all next weekend..

I'm pretty much excited that you guys/gals are choosing the seam way, =
cuz I've seen what it can do..:)

I'd realy like to do some contribution, but I'm basically only able to =
do it over the weekends..

Hope to contribute some of my time in this bazaar..:)

Best Regards,
Johan Iskandar  =20
=20

-----Original Message-----
From: ade...@li... =
[mailto:ade...@li...] On Behalf Of =
kontro
Sent: 03 April 2007 13:16
To: ade...@li...
Subject: [Adempiere-tang] Awakenings

Hello

Have to say that I have done such a discoveries lately that I feel
happy, amazed and dumb at the same time.

I have been reading specs and trying to find "best" building blocks for
Tang (Not been sharing enough - I know). And as usual answer has been
all the time just under my nose.

I talked earlier about possibility of getting social synergy by choosing
JBoss technology stack JEMS. But I did not scratch surface of the
JEMS deep enough.

I have stated on Tang wiki page that sun's Glassfish project does have
better support for JSR's than Jboss - and I was plain wrong. Those two
projects seems to have different strategy. If new functionality is
needed Sun makes up new JSR and provides reference implementation for
that in Glassfish. JBoss ads new features portable way top of the
existing tech stack.

Now you - my dear reader - might point out that it is stated clearly
on JBoss's website that all of they components run on any J2EE server
and most of the components work perfectly even on plain Tomcat or J2SE.
For couple months I have been thinking that it is just marketing
phrase (yes you can laugh at me). Because I am all too used to=20
software providers who claim that their software is portable/compatible
and it usually is that only on paper.

But JBoss really does things in portable way. I was amazed when finding
out that they even provide deployment scripts for half a dozen different
j2ee servers with some of their Seam demos.

So these are *my* technology recommendations for Adempiere's future:

Base functionality - EJB3

Support for both AOP and SOA. Part of the J2EE5 spec. Since all EJB
specific features are implemented using annotations code can be reused
even outside of J2EE container if needed.

Persistence - Hibernate

Wide database support. Runs in any container or application. Good JPA
support. Good lazy loading features to support Seam.

Workflows/Business processes - jBPM

Can be integrated with any Java application. Supports both jPDL and
BPEL. Does have graphical workflow designer.

Rule engine - Jboss rules

Since Bahman says it is good. Do I have to say more ?

Graphical user interface - JBoss seam

I could mention dozens of frameworks I did review and not many
provide mature implementation which can be used in Adempirian way. And=20
are modular enough. Ironically Seam were my last framework to review. I
thought that Seam is too "non-standard" to choose. But I was wrong
(again). Seam is built top of JSF. So most of the code can be reused
in non Seam implementations. Seam has excellent support for
JPA's lazy loading and caching. By just reading how to Seam works it is
easy to imagine how much processing power it saves by reducing database
queries and optimistic locking exceptions. And Seam has good AJAX
support.


And all of these tools work well together. Have to say that I am really
stunned how talented people RedHat has in Jboss team.

Recommended reading (pdf/html version costs $28):
http://www.michaelyuan.com/blog/seam-next-gen-web-framework/

And these aspects I considered during my evaluation:

- Amount of coding needed
- Modularity/flexibility/portability
- Is structure easy to understand
- Can Adempiere AD be used efficiently
- SOA interfacing
- Is structure easy to teach
- Scalability/manageability
- Clustering efficiency
- ASP business needs
- Maturity
- Suitability for small business
- Availability of support services for big enterprises
- How well known apis are amongst java developers
- Possible synergy between Adempiere and platform communities
- Ease of administering and installing
- Amount of both free and non-free documentation/books/examples

This message is result of three months almost 12*7 evaluation/studying
process. And I am pretty sure that I have good arguments to defend my
recommendations. It took much more time to reach this conclusion than
I had hoped (originally I planned to do it between dec 26 and dec 31
2006). Now (finally) I have gained confidence about the road I am=20
proposing.

Also studying many different technologies from Adempiere's view of point
gave many great ideas how things could be solved.

And here is some of the stuff I have been studied during last 3 months:

SOAP, WSDL, JAX-WS, EJB3, Glassfish, JBoss, GWT, UDDI, BPEL, jBPEL,
Geronimo, Spring, XHTML2, XFORMS, XUL, Various firefox plugins, JPA,
Toplink, Hibernate, OpenJpa, ESB, OpenESB, Jboss ESB, OpenLaszlo, RMI,
various ws-security proposals, ZK ajax, JMX, JSON, Dojo toolkit, JBI,
CookSwing, Swingx, JAXB, XML-rpc, JavaAssist. And many more which
I can not recall now.

I printed out over 2000 sheets (double sided) of JSR's, W3C recs and
other documentation. Main resources of information additional of the
each project's home pages have been Wikipedia and Oreilly's Safari =
Online
bookshelf.

So I did lot of work to find out the most obvious result...

Next step will be preparing amazing demo to be shown in Berlin :)

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