Drools IDE Views and StatelessSessions
by Miles, Eric
I don't see anywhere in the documentation that states the Drools IDE
Views such as Working Memory, Global, and Agenda will not work with
Stateless sessions, but I'm having problems having anything appear here
using Drools 5.0.0. Using a Stateful Session, these views are
populated. Changing the same test to a Stateless Session nothing
appears. Breakpoints DO work with the Stateless Session as I can stop
inside of a consequence. Some bound facts are present in the Debug
Variables view, but not all. Am I doing something wrong or is this a
limitation of the IDE?
Thanks.
Eric Miles
16 years, 7 months
Creating a workflow for the Business Rules lifecycle in trac
by Premkumar Stephen
Hello all,
Out here in our company, we use trac to manage the lifecycle from the
request to create and enhance code artifats, the developers then code and
test, and then we deploy to a particular milestone.
The business rules process however, did not correspond to the default
development cycle and I am planning to create a specific workflow for rules.
I was wondering if any one else on this list has worked on something
similar.
Best practices/tips welcome.
Regards,
Prem
16 years, 7 months
How to create nested rules in Drool Guvnor
by Pardeep.Ruhil＠lntinfotech.com
Hi Users,
I have a scenario in which I have to make nested rules.
But I don't know how it is to be done in Drools Guvnor. I had created them
in Drool Rule Engine, but have no clue
of the same in Drool Guvnor.
Can you please tell me how to achieve this in Drool Guvnor , as it is very
urgent.
Please tell.
Thanks & Regards
Pardeep Ruhil
______________________________________________________________________
16 years, 7 months
Drools 5 RuleFlow error in constraints of simplest split node
by Marc Dzaebel
Hi,
after creating the standard RuleFlow example with Drools 5 in Eclipse,
adding a gateway with two (true) constraints leads to the following error
"org.drools.compiler.RuleFlowLoadError: Unable to load the rule flow. :
Exception class org.xml.sax.SAXParseException : <constraint> requires a
'toType' attribute". This seems to be a very basic serious problem.
Here is my RuleFlow file in which I only added one split node and a trivial
output action.
<?xml version="1.0" encoding="UTF-8"?>
<process xmlns="http://drools.org/drools-5.0/process"
xmlns:xs="http://www.w3.org/2001/XMLSchema-instance"
xs:schemaLocation="http://drools.org/drools-5.0/process
drools-processes-5.0.xsd"
type="RuleFlow" name="ruleflow" id="com.sample.ruleflow"
package-name="com.sample" >
<header></header>
<nodes>
<start id="1" name="Start" x="16" y="16" />
<actionNode id="2" name="Hello" x="246" y="138" width="80" height="48" >
<action type="expression" dialect="mvel" >System.out.println("Hello
World");</action>
</actionNode>
<end id="3" name="End" x="468" y="153" width="48" height="48" />
<split id="4" name="Split" x="100" y="106" type="3" >
<constraints>
<constraint toNodeId="2" name="constraint" priority="1" type="rule"
dialect="mvel" >eval(true)</constraint>
<constraint toNodeId="5" name="test" priority="1" type="rule"
dialect="mvel" >eval(true)</constraint>
</constraints>
</split>
<actionNode id="5" name="Test" x="228" y="51" >
<action type="expression" dialect="mvel"
>System.out.println("Test");</action>
</actionNode>
<end id="6" name="End" x="467" y="71" />
</nodes>
<connections>
<connection from="4" to="2" />
<connection from="2" to="3" />
<connection from="1" to="4" />
<connection from="4" to="5" />
<connection from="5" to="6" />
</connections>
</process>
Any ideas?
Thanks in advance
Marc
--
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16 years, 7 months
Do you love to play Magic The Gathering? (Renton, WA) (Job Posting)
by Mark Proctor
http://blog.athico.com/2009/08/do-you-love-to-play-magic-gathering.html
This came up in my google alerts today, and applying Drools to computer
games is something I've always wanted to see happen :) If anyone gets
the contract, you can be sure the Drools team will be available to you
for direct free mentoring - actually I insist on it :)
Do you love to play Magic The Gathering? (Renton, WA)
<http://seattle.craigslist.org/est/sof/1309824161.html>
http://seattle.craigslist.org/est/sof/1309824161.html
------------------------------------------------------------------------
Date: 2009-08-06, 4:44PM PDT
Reply to: job-vtfwu-1309824161(a)craigslist.org
<mailto:job-vtfwu-1309824161@craigslist.org?subject=Do%20you%20love%20to%20play%20Magic%20The%20Gathering%3F%20%28Renton%2C%20WA%29&body=%0A%0Ahttp%3A%2F%2Fseattle.craigslist.org%2Fest%2Fsof%2F1309824161.html%0A>
^[Errors when replying to ads?
<http://www.craigslist.org/about/help/replying_to_posts>]
------------------------------------------------------------------------
Do you love to play Magic The Gathering and have experience with technology?
We are looking for a consultant to provide an initial assessment of the
applicability of rules and constraint based programming to the on-line
version of the game Magic: The Gathering.
The initial engagement is for one to two weeks and the bulk of the work
can be done remotely with flexible hours.
Mandatory qualifications are as follows:
1. At least 3 years of Magic: The Gathering play experience.
2. Active user of Magic: The Gathering Online
3. A Pro Tour Level Player or certified Magic Judge
4. At least 3 years of rule based programming experience in at least two
of the following tools:
a)Eclipse Rules/ Oracle Policy Automation
b)Clips
c)Jess
d)Corticon Rules
e)BizTalk Rules
f)JBoss Rules
g)Art Enterprise
h)OPS 83
i)ILog/IBM Rules
5. A theoretical understanding of the Rete algorithm and other rule
processing optimizations
6. Experience with all of the following:
a)Natural or domain language rule expression
b)Programming language rule expression
c)Visual rule editing and diagramming
Most of the work can be done remotely, however some on-site meetings
will be required. Estimate of 20-80 hours of total work over two weeks,
could be an on-going need if you like the work
If you are interested in applying, please send me your current word.doc
resume and let me know a good time to give you a call.
* Location: Renton, WA
* Compensation: Competitive
* Telecommuting is ok.
* This is a part-time job.
* This is a contract job.
* Principals only. Recruiters, please don't contact this job poster.
* Please, no phone calls about this job!
* Please do not contact job poster about other services, products or
commercial interests.
16 years, 7 months
Process Persistence (JPA) and the WSHumanTaskHandler
by SBalakrishnan
Hi,
I am new to drools flow and have the question below.
After enabling persisentence (JPA) on the process side and
using the out of the box WSHumanTaskHandler.
Ran into a java.lang.NullPointerException on completing
the Human Task (used the Eclipse Human Task view to do it)
[2009:08:221 14:08:765:exception] Uncaught exception on client
java.lang.NullPointerException
at
org.drools.persistence.processinstance.JPAWorkItemManager.completeWorkItem(JPAWorkItemManager.java:83)
at
org.drools.process.workitem.wsht.WSHumanTaskHandler$GetCompletedTaskResponseHandler.execute(WSHumanTaskHandler.java:282)
at
org.drools.task.service.TaskClientHandler.messageReceived(TaskClientHandler.java:67)
at
org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.messageReceived(DefaultIoFilterChain.java:752)
at
org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:414)
at
org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:49)
at
org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:832)
at
org.apache.mina.filter.codec.ProtocolCodecFilter$ProtocolDecoderOutputImpl.flush(ProtocolCodecFilter.java:379)
at
org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:173)
at
org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:414)
at
org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:49)
at
org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:832)
at
org.apache.mina.core.filterchain.DefaultIoFilterChain$HeadFilter.messageReceived(DefaultIoFilterChain.java:616)
at
org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:414)
at
org.apache.mina.core.filterchain.DefaultIoFilterChain.fireMessageReceived(DefaultIoFilterChain.java:408)
at
org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:578)
at
org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:540)
at
org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:532)
at
org.apache.mina.core.polling.AbstractPollingIoProcessor.access$400(AbstractPollingIoProcessor.java:58)
at
org.apache.mina.core.polling.AbstractPollingIoProcessor$Worker.run(AbstractPollingIoProcessor.java:857)
at
org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:51)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Am I missing something or does the WSHumanTaskHander not support
the above ?
Note:-
Was able to get these pieces working when process was
not using JPA persistence.
Thanks
Sanjay
--
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16 years, 7 months
How to create new permission in Drools Guvnor
by Pardeep.Ruhil＠lntinfotech.com
Hi,
I am using Drools Guvnor. I want to know how we can create new permission
that we assign to a user.
Presently we have admin, Analyst, Analyst.readonly, Package.admin,
Package.developer, Package.readonly.
Also if i am giving package.readonly permission to User, he is able to
modify the rules present in the package to which he is associated with
package.readonly permission, ideally that should not happen for a readonly
permission.
Can u please tell me, how to assign the permission , so that user can just
see the rules rather edit them.
Is it possible?
Thanks & Regards
Pardeep Ruhil
______________________________________________________________________
16 years, 7 months
Re: [rules-users] Strategy for initializing objects
by Greg Barton
You answer your own question. Use accumulate:
rule "Hello World"
when
b : Box( x == -1 )
newX : Integer() from accumulate( box: Box( x != -1 ),
init( int i = 0; ),
action( i += box.size; ),
reverse( i -= box.size; ),
result( i ) )
then
System.out.println("Sum: " + newX);
b.setX(newX);
System.out.println(b);
update(b);
end
See attached project.
--- On Sat, 8/8/09, sonia <robotnic+drools(a)gmail.com> wrote:
> From: sonia <robotnic+drools(a)gmail.com>
> Subject: Re: [rules-users] Strategy for initializing objects
> To: "Rules Users List" <rules-users(a)lists.jboss.org>
> Date: Saturday, August 8, 2009, 2:36 AM
> In general: I want to set a property
> in the Box objects, depending on
> all previously set objects..
>
> My goal is to place the boxes one after another, for this I
> keep a
> variable in Box object.
> It seems like the easiest way to accumulate the sizes of
> boxes that
> are already placed.
>
> In the 'then' clause, I set the box location, and update
> the X by
> adding the size of the currently placed box.
>
> 2009/8/8 Wolfgang Laun <wolfgang.laun(a)gmail.com>:
> > Your goal and the presented code aren't clear to me.
> The consequence (after
> > then) contains calls to static/class methods
> (Box.setX()) which isn't going
> > to change anything in your fact object. The call
> b.setX() might change your
> > object, but this depends on what the class method
> Box.getX() returns.
> >
> > Assuming Drools 5, a typical consequence would look
> like
> > b: Box(...)
> > then
> > modify( b ){
> > setX( ... )
> > }
> > end
> >
> > -W
> >
> > On Sat, Aug 8, 2009 at 1:48 AM, sonia <robotnic+drools(a)gmail.com>
> wrote:
> >>
> >> Hello
> >>
> >> I want to achieve this:
> >> box1.setX(0)
> >> box2.setX(box1.size());
> >> box2.setX(box1.size + box2.size)
> >> ...
> >>
> >> I want to do it with rules, and would like to know
> what's the best
> >> method of initializing (or any other operation
> with varying data) a
> >> group of objects
> >>
> >> rule "init box"
> >> when
> >> b : Box( x == -1)
> >> then
> >> b.setX(Box.getX());
> >> Box.setX( Box.getX() + b.size);
> >> end
> >>
> >> This does not work.
> >> A single box object is matched several times
> instead of different box
> >> objects.
> >> What is happening? how come a single box object is
> matched several
> >> times? Why doesnt drools choose other instances of
> box?
> >>
> >> What do I need to do to initialize all boxes, once
> for every box?
> >>
> >> Thank you.
> >>
> >> --
> >> robosonia
> >> _______________________________________________
> >> rules-users mailing list
> >> rules-users(a)lists.jboss.org
> >> https://lists.jboss.org/mailman/listinfo/rules-users
> >
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users(a)lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
> >
>
>
>
> --
> robosonia
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
16 years, 7 months
