Decision Tables with O(10000) rows
by Wolfgang Laun
A recent post on the users list has led me to investigate DTs with
O(10000) rows. While the sample XLS with 26,400 rows and 6 condition
and 1 action columns was still manageable, a (my) system may exhibit
severe memory problems when the number of rows is increased.
Test indicate that ~25,000 rows is just about manageable if you don't
need lightning startup for your application - serialization doesn't
help here.
It would appear that Drools users are (not intentionally) led to
believe that Drools' performance is immune against the usual
detriments that arise from "large numbers".
I think that Section 2.4., Decision Tables in Spreadsheets, should
contain a warning.
-W
11 years, 10 months
Drools & jBPM Workshops(Next Week) : June : WDC NYC
by Mark Proctor
http://blog.athico.com/2012/06/drools-jbpm-workshops-june-wdc-nyc.html
----pasted from url---
JBoss BRMS (Drools and jBPM) Workshops
Drools 5, the upstream for JBoss BRMS, is a Business Logic integration
Platform, and provides a unified and integrated platform for Rules,
Workflow and Event Processing. It's been designed from the ground up so
that each aspect is a first class citizen, with no compromises. Drools
may be easily used with jBPM, a flexible business process management suite.
Want to learn more?
Join us for one of two complimentary full day, hands-on workshop on
Drools and jBPM, where we will cover:
* The ecosystem that encompasses the Drools open source project and
the JBoss BRMS
* Benefits of rules systems, business workflows, and specific challenges
* The history of rules systems, where they are going, and the current
state of the art
* Various features of the BRMS via a hands on demo
* BPMN 2.0 and the future of Business Process Management
Be prepared to work hands-on with the tools, meet the team behind the
engine, and have your questions answered. This event will give you
unparalleled access to industry-recognized leaders in the rules community.
There are two dates to choose from:
* Tuesday, June 19 2012 in New York City
<http://app.engage.redhat.com/e/er?s=1795&lid=1384&elq=d3d6d783acbc4c7382b...>
* Thursday, June 21, 2012 (Government focus) in Washington DC
<http://app.engage.redhat.com/e/er?s=1795&lid=5482&elq=d3d6d783acbc4c7382b...>
Speakers:
Jim Tyrrell
<http://app.engage.redhat.com/e/er?s=1795&lid=5483&elq=d3d6d783acbc4c7382b...>,
Principle JBoss Solution Architect, Red Hat
Mark Proctor
<http://app.engage.redhat.com/e/er?s=1795&lid=5483&elq=d3d6d783acbc4c7382b...>,
Drools Project Lead and Founder, Red Hat
Edson Tirelli
<http://app.engage.redhat.com/e/er?s=1795&lid=5483&elq=d3d6d783acbc4c7382b...>,
Senior Software Engineer, Red Hat
Kris Verlaenen
<http://app.engage.redhat.com/e/er?s=1795&lid=5483&elq=d3d6d783acbc4c7382b...>,
jBPM Lead Engineer, Red Hat
Prakash Aradhya
<http://app.engage.redhat.com/e/er?s=1795&lid=5483&elq=d3d6d783acbc4c7382b...>,
Senior Product Manager, Red Hat
/*Attendees are responsible for bringing their own laptop to this event.
Please make sure your laptop has the ability to copy files from a USB,
which will provide the software for the hands-on sessions, and have JDK
1.6 already installed./
Register now as space is limited. We look forward to seeing you there!
11 years, 11 months
Re: [rules-dev] [rules-users] Trouble using java.util.List.size in constraints in 5.4.0.Final
by Wolfgang Laun
This looks like a bug.
MyObject( param.size > 0 ) => incorrect diagnostic
But:
MyObject( param.size() > 0 ) =>OK
MyObject( param.size == 0 ) =>OK
MyObject( param.size != 0 ) =>OK
-W
On 14/06/2012, Alexis Brouard <alexis.brouard(a)haulogy.net> wrote:
> Hi everyone,
>
> I've tried to go from Drools 5.3.0.Final to 5.4.0.Final and some strange
> errors appeared on constraints using the size of a list.
>
> For instance, given the following object:
>
> public class MyObject {
>
> private List<String> param = new ArrayList<String>();
>
> public MyObject() {
> super();
> }
>
> public List<String> getParam() {
> return param;
> }
>
> public void setParam(List<String> param) {
> this.param = param;
> }
> }
>
>
> This rule:
>
> rule "Sample rule"
> when
> MyObject( param.size > 0 )
> then
> System.out.println( "Sample rule activated" );
> end
>
>
> Provokes the following error:
>
> Unable to Analyse Expression param.size > 0:
> [Error: Comparison operation requires compatible types. Found class
> java.lang.String and class java.lang.Integer]
> [Near : {... param.size > 0 ....}]
> ^ : [Rule name='Sample rule']
>
>
> This worked very well in Drools 5.3.0.Final.
> Is there some configuration specific to Drools 5.4.0.Final that I've missed
> in the release notes?
>
> Thanks in advance for your help.
>
> Best,
> Alexis
>
11 years, 11 months
unification construct != conditional expression
by Wolfgang Laun
Unification can be expressed by writing a variable name, ":=" and a
field name, so:
$uniVar := uniField
If this is all by itself, it's just a unification:
FactType( ..., $uniVar := uniField, ... )
It can also be tacked onto a constraint:
FactType( ..., $uniVar := uniField == something, ... )
which is semantically the same as
FactType( ..., $uniVar := uniField, uniField == something, ... )
But the parser (in 5.4.0) also accepts such a construct:
FactType( ..., xField == 42 || $uniVar := uniField && yField == "Y",... )
which, I think, isn't useful, just confusing.
Would someone consider fixing this?
-W
11 years, 11 months
Drools & jBPM Workshops : June : WDC NYC
by Mark Proctor
Only a week to go, and spaces are filling up fast. If you want to go,
register ASAP.
http://blog.athico.com/2012/06/drools-jbpm-workshops-june-wdc-nyc.html
----pasted from url---
JBoss BRMS (Drools and jBPM) Workshops
Drools 5, the upstream for JBoss BRMS, is a Business Logic integration
Platform, and provides a unified and integrated platform for Rules,
Workflow and Event Processing. It's been designed from the ground up so
that each aspect is a first class citizen, with no compromises. Drools
may be easily used with jBPM, a flexible business process management suite.
Want to learn more?
Join us for one of two complimentary full day, hands-on workshop on
Drools and jBPM, where we will cover:
* The ecosystem that encompasses the Drools open source project and
the JBoss BRMS
* Benefits of rules systems, business workflows, and specific challenges
* The history of rules systems, where they are going, and the current
state of the art
* Various features of the BRMS via a hands on demo
* BPMN 2.0 and the future of Business Process Management
Be prepared to work hands-on with the tools, meet the team behind the
engine, and have your questions answered. This event will give you
unparalleled access to industry-recognized leaders in the rules community.
There are two dates to choose from:
* Tuesday, June 19 2012 in New York City
<http://app.engage.redhat.com/e/er?s=1795&lid=1384&elq=d3d6d783acbc4c7382b...>
* Thursday, June 21, 2012 (Government focus) in Washington DC
<http://app.engage.redhat.com/e/er?s=1795&lid=5482&elq=d3d6d783acbc4c7382b...>
Speakers:
Jim Tyrrell
<http://app.engage.redhat.com/e/er?s=1795&lid=5483&elq=d3d6d783acbc4c7382b...>,
Principle JBoss Solution Architect, Red Hat
Mark Proctor
<http://app.engage.redhat.com/e/er?s=1795&lid=5483&elq=d3d6d783acbc4c7382b...>,
Drools Project Lead and Founder, Red Hat
Edson Tirelli
<http://app.engage.redhat.com/e/er?s=1795&lid=5483&elq=d3d6d783acbc4c7382b...>,
Senior Software Engineer, Red Hat
Kris Verlaenen
<http://app.engage.redhat.com/e/er?s=1795&lid=5483&elq=d3d6d783acbc4c7382b...>,
jBPM Lead Engineer, Red Hat
Prakash Aradhya
<http://app.engage.redhat.com/e/er?s=1795&lid=5483&elq=d3d6d783acbc4c7382b...>,
Senior Product Manager, Red Hat
/*Attendees are responsible for bringing their own laptop to this event.
Please make sure your laptop has the ability to copy files from a USB,
which will provide the software for the hands-on sessions, and have JDK
1.6 already installed./
Register now as space is limited. We look forward to seeing you there!
11 years, 11 months
Drools & jBPM Workshops : June : WDC NYC
by Mark Proctor
http://blog.athico.com/2012/06/drools-jbpm-workshops-june-wdc-nyc.html
----pasted from url---
JBoss BRMS (Drools and jBPM) Workshops
Drools 5, the upstream for JBoss BRMS, is a Business Logic integration
Platform, and provides a unified and integrated platform for Rules,
Workflow and Event Processing. It's been designed from the ground up so
that each aspect is a first class citizen, with no compromises. Drools
may be easily used with jBPM, a flexible business process management suite.
Want to learn more?
Join us for one of two complimentary full day, hands-on workshop on
Drools and jBPM, where we will cover:
* The ecosystem that encompasses the Drools open source project and
the JBoss BRMS
* Benefits of rules systems, business workflows, and specific challenges
* The history of rules systems, where they are going, and the current
state of the art
* Various features of the BRMS via a hands on demo
* BPMN 2.0 and the future of Business Process Management
Be prepared to work hands-on with the tools, meet the team behind the
engine, and have your questions answered. This event will give you
unparalleled access to industry-recognized leaders in the rules community.
There are two dates to choose from:
* Tuesday, June 19 2012 in New York City
<http://app.engage.redhat.com/e/er?s=1795&lid=1384&elq=d3d6d783acbc4c7382b...>
* Thursday, June 21, 2012 (Government focus) in Washington DC
<http://app.engage.redhat.com/e/er?s=1795&lid=5482&elq=d3d6d783acbc4c7382b...>
Speakers:
Jim Tyrrell
<http://app.engage.redhat.com/e/er?s=1795&lid=5483&elq=d3d6d783acbc4c7382b...>,
Principle JBoss Solution Architect, Red Hat
Mark Proctor
<http://app.engage.redhat.com/e/er?s=1795&lid=5483&elq=d3d6d783acbc4c7382b...>,
Drools Project Lead and Founder, Red Hat
Edson Tirelli
<http://app.engage.redhat.com/e/er?s=1795&lid=5483&elq=d3d6d783acbc4c7382b...>,
Senior Software Engineer, Red Hat
Kris Verlaenen
<http://app.engage.redhat.com/e/er?s=1795&lid=5483&elq=d3d6d783acbc4c7382b...>,
jBPM Lead Engineer, Red Hat
Prakash Aradhya
<http://app.engage.redhat.com/e/er?s=1795&lid=5483&elq=d3d6d783acbc4c7382b...>,
Senior Product Manager, Red Hat
/*Attendees are responsible for bringing their own laptop to this event.
Please make sure your laptop has the ability to copy files from a USB,
which will provide the software for the hands-on sessions, and have JDK
1.6 already installed./
Register now as space is limited. We look forward to seeing you there!
11 years, 11 months
