<p>Firstly a correction.</p>
<p>Drools "rule engine" otherwise known as Drools Expert does not use JCR by default. Guvnor (Drools rule authoring and management web applicafion) does use JCR as its persistent store. JCR is better thought of as a hierarchical data store than a (R)DBMS.</p>
<p>That said Drools Expert can access databases and web services with the assistance of helper classes and the "from" keyword. The user guide will give fuller details.</p>
<p>That said you are also free to retrieve Facts for insertion into Drools Expert from where- and however you like.</p>
<p>sent on the move</p>
<p>On 14 Feb 2013 07:34, "starfish15" <<a href="mailto:pooja.ghosh@accenture.com">pooja.ghosh@accenture.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hello All,<br>
<br>
I am starting up on a project which requires Drools rules. I have been asked<br>
certain basic Q's. Am jotting them below<br>
<br>
1. *Can the Drools Rule engine communicate to a DB *<br>
<br>
I know by default, drools does use the *Apache JackRabbit DB* to store<br>
respective assets and there are means to use other DBs as well. Not sure<br>
what else this Q could mean. So would really appreciate if some light can be<br>
thrown on this. What else things which could be achieved through the rules<br>
and DB connection<br>
<br>
2. *Can the Drools Rule engine do web service calls to other system*<br>
<br>
I am not sure if this can be achieved through Drools. Would appreciate if<br>
some assistance could be provided on this and some working examples as well<br>
if this can actually be achieved.<br>
<br>
Regards,<br>
starfish<br>
<br>
<br>
<br>
--<br>
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</blockquote></p>