[rules-users] Drools with Web Application

[Jervisliu]

Deepak Jambhekar wrote:
> Hi Jervisliu,
>
>        I have a similar case where in I need to integrate Guvnor to 
> one of my web application which is developed in Struts Framework... 
> Can you pls suggest me how can I do this?
> .
This depends on what Guvnor functions you want to call from your web 
application. And you want to call them from your server side application 
or from your client side. The easiest way is to expose Guvnor through 
your own servlets. You need to write some servlets, put them in 
Guvnor.war. An alternative is to expose Guvnor through RESTful 
interface, eg., Atom/Pub based. The current version of Guvnor provides a 
preliminary support of Atom/Pub. For example, you can find a RSS icon on 
Asset widget. Using that RSS URL, your application can do some simple 
interactions with Guvnor server such as subscribing to change history 
etc. However as I said this is only a "preliminary" support, we are 
still far from a fully "RESTfulized" Guvnor. If you are interested in 
this approach, please take a look into Guvnor SOA project [1]. This 
project is still under prototyping phase, but the Atom/Pub interface 
part is almost done. SVN is [2].


[1]. http://www.jboss.org/guvnor/
[2]. https://svn.jboss.org/repos/guvnor/trunk

Jervis

Another approach which I think is the
> Deepak Prabhakar Jambhekar
>
>
> -----rules-users-bounces at lists.jboss.org wrote: -----
>
>     To: Rules Users List <rules-users at lists.jboss.org>
>     From: Jervisliu <jliu at redhat.com>
>     Sent by: rules-users-bounces at lists.jboss.org
>     Date: 11/27/2009 09:45AM
>     Subject: Re: [rules-users] Drools with Web Application
>
>     Things can be very straightforward if your web application is GWT
>     based.
>     You can use GWT RPC to talk to the Guvnor server. See
>     trunk\drools-guvnor\src\main\java\org\drools\guvnor\server\ServiceImplementation.java
>
>     for details. Most functions that are called from Guvnor GUI are
>     implemented in this class. If this doesnt work for you, you will
>     need to
>     somehow expose Guvnor server side functions
>     (ServiceImplementation.java)
>     by yourself, eg, through a Servlet or through a RESTful service
>     interface.  Unfortunately Guvnor does not have this capability yet,
>     though there were some talks about implementing such features in the
>     future. You may want to take a look at Apache CXF [1] or JBOSS
>     RESTEasy
>     [2] on how to use a JSR-311 implementation to publish Guvnor as
>     Restful
>     (Atom/Pub) services. Let me know if you have interest to explore this
>     further, I can provide more information on this.
>
>     [1].http://cwiki.apache.org/CXF20DOC/jax-rs.html
>     [2]. http://www.jboss.org/resteasy/
>
>     Cheers,
>     Jervis
>     > Hello,
>     >
>     > Drools is very new to me. So please excuse me if this question
>     sounds too naive.
>     >
>     > Basically my requirement is: I have a web based (3-tier j2ee)
>     > application which is
>     > deployed in JBoss AS. Now I want to incorporate some business rule
>     > implementations with this application so that end users, who are not
>     > very technical, can add/modify the rules according to their need. I
>     > suppose Drools Guvnor will be the front end and rules repository and
>     > Drools Expert will be
>     > the back end for such requirements. Please correct me if I am wrong.
>     >
>     > I had gone through the drools documentation. That talks about
>     > stand-alone application for guvnor itself, but I want to use Guvnor
>     > inside my existing application itself, preferably by using some
>     Guvnor API.
>     >
>     > Can some one please provide some insight on how to do this.
>     Also, I'll
>     > appreciate if some one can point me to some getting started/best
>     > practice documents for these stuffs?
>     >
>     > Many thanks in advance,
>     > --
>     > Sahid
>     > Argue with idiots, and you become an idiot. - PG
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