[rules-users] How to start with Drools Fusion as a Java enterprise newbie

[Thomas Söhngen]

Hi Steven,

thank you very much for the code example, I'll take a deeper look at it. 
Are you using Fusion too?

For our Drools project we need minimal logic for the application itself. 
We just need a database of rules and need to send streams of events to 
Fusion. When rules are matched, a message should be send to a pub/sub 
channel. This is all the logic we need for our application.

We are currently not using any "classic" Java framework (like Spring 
etc.), but we are using a specialized framework for distributed realtime 
computation (Storm). I have no experience with the classic application 
frameworks and thats my biggest problem atm, because it's hard for me to 
find a good way to start with Drools without any EE application 
background. Your example seems to be a good starting point for this, so 
thank you again :)

Best regards,
Thomas

Am 1/18/2013 11:44 AM, schrieb Stephen Masters:
> Hi Thomas,
>
> I don't know what frameworks you were thinking of using, but this 
> might be a reasonable basic example of a Java web application with 
> Drools components:
> https://github.com/gratiartis/sctrcd-fx-web
>
> It's something I have been knocking up as a minimal example project. 
> As such, it's a work in progress, and the Drools functionality is 
> *very* minimal. I'm just at the stage where I'm looking to make that 
> part of the projects a little bit richer.
>
> It's built on Maven and the Spring Framework. As such you should be 
> able to cd into the root of the project and run "mvm jetty:run" to run 
> it up in a web container.
>
> My tip for getting your project up and running initially would be to 
> ignore JBoss AS for now, and run your project up on Tomcat. It should 
> reduce the complexity of your deployment, so you can concentrate on 
> your application instead. At a later stage, you may find it worth 
> moving to JBoss AS as your application server, in which case your app 
> would be running up inside Tomcat anyway, so if your app works under 
> Tomcat, there should be little or no change to migrate to JBoss AS.
>
> For your local dev purposes, this has the added benefit that maven can 
> spawn a Tomcat container on the fly, so you don;t need to worry too 
> much about server config.
>
> Steve
>
>
> On 17 Jan 2013, at 10:59, Thomas Söhngen 
> <thomas.soehngen at stockpulse.de <mailto:thomas.soehngen at stockpulse.de>> 
> wrote:
>
>> Hi,
>>  I am currently evaluating Drools for our needs, from the features it 
>> seems to be a perfect fit. I am a Java developer, but unfortunately I 
>> have no background in enterprise application servers and I am 
>> currently stuck trying to setup a testing environment. A short 
>> summary of our current setup and how we want to use Drools:
>>
>>   * We are using Storm <https://github.com/nathanmarz/storm> to
>>     accumulate a large number of messages from around the web
>>   * From these we create streams of message metadata (like sentiment)
>>     for different topics (like stocks)
>>   * We have additional streams like stock-tickers
>>   * We have a knowledge-base of additional facts about companies
>>     (like market cap.) in MySQL
>>   * We want users to be able to define alerts triggered by rules
>>     based on these streams and facts
>>
>> Storm is perfect for the data pre-processing and aggregation, Drools 
>> would fit in to allow outsiders to define rules and evaluate them on 
>> the streams in realtime. My idea is, to run Drools Fusion as a 
>> stand-alone application on a dedicated server or cluster of servers. 
>> Drools Guvnor would be used as an interface for the rules. The rules 
>> would trigger new events, which would be sent to a subscription 
>> channel (like Redis Pub/Sub).
>>
>> As mentioned above, I have no experience in setting up and running 
>> Java application servers. The Drools documentation seems to be very 
>> elaborate, but assume that you know how to start such a service from 
>> scratch, which I don't. I know Java, but not at an enterprise level, 
>> so all the Beans, wars, etc. are new to me. I setup a JBoss AS, which 
>> was a pretty easy thing to do, but I am clueless about how to really 
>> "run" Drools on it and what to do next.
>>
>> So what would be the next steps to get a server, where I can send 
>> messages to? Are there any tutorials or guidelines which describe how 
>> to built such a thing from the very beginning? Any help or suggestion 
>> would be very appreciated!
>>
>> Regards & thanks in advance,
>> Thomas Söhngen
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>
>
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Thomas Söhngen

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