Re: [rules-users] conways game of life
Its interesting, Conways game of life was created to demonstrate a "determinisitc universe" - if you think as the little "critters" as life forms its pretty cool. A good example of how very very simple rules (and only a small number) can create complex behaviour. On 4/17/07, Mark Proctor <[EMAIL PROTECTED]> wrote: I have just moved Jeff Brown's "Conways Game of Life" to a stateful example, this is now the best place to look to understand jboss rules. It's also good to compare this stateful implementation to the old stateless version. Trunk introduces a new feature to help deal with recursion "lock-on-active" which stops a rule being able to create activations while it's agenda-group/rule-flow-group has focus - so it's a much stronger no-loop. Probably the most important thing this example shows is how to think relationally, the old example used nested properties and sets to maintain the "neighbour" information; this example shows how to achieve the same but expressing it relationally, using the Neighbor relation class, further it shows how we can exploit the the cross-product relational information to drive the engine without us having to write loops. Currently the example is using agenda-groups to drive execution flow, I'm now in the process of moving this to rule-flow-groups. You'll need trunk to be able to run this, so checkout: http://anonsvn.labs.jboss.com/labs/jbossrules/trunk/ Make sure you have maven 2.0.6 installed and then type the following from the root directory: mvn clean install -Declipse=true The eclipse plugin will now be built in the drools-eclipse/target directory, so open that up and unzip into your eclipse install (make sure you use -clean to start eclipse). Then import drools-examples and "run as application" the ConwayGUI class. I plan to do a blog or two on how this exampe works, and my next challenge will be to migrate the pacman game to jboss rules. Mark -- Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in UK and Wales under Company Registration No. 3798903 Directors: Michael Cunningham (USA), Charlie Peters (USA) and David Owens (Ireland) package org.drools.examples import org.drools.examples.conway.Cell; import org.drools.examples.conway.CellGrid; import org.drools.examples.conway.Neighbor; import org.drools.examples.conway.Phase; import org.drools.examples.conway.CellState; import org.drools.WorkingMemory; import org.drools.common.InternalWorkingMemoryActions; import org.drools.RuleBase; rule "register north east" agenda-group "register neighbor" when CellGrid( $numberOfColumns : numberOfColumns ) $cell: Cell( $row : row > 0, $col : col < ( $numberOfColumns - 1 ) ) $northEast : Cell( row == ($row - 1), col == $col ) then assert( new Neighbor( $cell, $northEast ) ); assert( new Neighbor( $northEast, $cell ) ); end rule "register north" agenda-group "register neighbor" when $cell: Cell( $row : row > 0, $col : col ) $north : Cell( row == ($row - 1), col == $col ) then assert( new Neighbor( $cell, $north ) ); assert( new Neighbor( $north, $cell ) ); end rule "register north west" agenda-group "register neighbor" when $cell: Cell( $row : row > 0, $col : col > 0 ) $northWest : Cell( row == ($row - 1), col == ( $col - 1 ) ) then assert( new Neighbor( $cell, $northWest ) ); assert( new Neighbor( $northWest, $cell ) ); end rule "register west" agenda-group "register neighbor" when $cell: Cell( $row : row > 0, $col : col > 0 ) $west : Cell( row == $row, col == ( $col - 1 ) ) then assert( new Neighbor( $cell, $west ) ); assert( new Neighbor( $west, $cell ) ); end rule "Kill The Lonely" agenda-group "evaluate" no-loop when # A live cell has fewer than 2 live neighbors theCell: Cell(liveNeighbors < 2, cellState == CellState.LIVE, phase == Phase.EVALUATE) then theCell.setPhase(Phase.KILL); modify( theCell ); end rule "Kill The Overcrowded" agenda-group "evaluate" no-loop when # A live cell has more than 3 live neighbors theCell: Cell(liveNeighbors > 3, cellState == CellState.LIVE, phase == Phase.EVALUATE) then theCell.setPhase(Phase.KILL); modify( theCell ); end rule "Give Birth" agenda-group "evaluate" no-loop when # A dead cell has 3 live neighbors theCell: Cell(liveNeighbors == 3, cellState == CellState.DEAD, phase == Phase.EVALUATE) then theCell.setPhase(Phase.BIRTH); modify( theCell ); end rule "reset calculate" agenda-group "reset calculate" when then WorkingMemory wm = drools.getWorkingMemory(); wm.getAgenda().clearAgendaGroup( "calculate" ); end rule "kill" agenda-group "kill" no-loop when theCell: Cell(phase == Phase.KILL) then
Re: [rules-users] JBoss Rules IDE 3.1-M1 - Validating all *.xls files in source path?
Hi Bree. Well, thats a new thing Kris threw in - cause people were asking for it. It should only validate ones in the rules project itself - I assume that is what you mean? If this is a problem for you, could you create a JIRA and state your case? it may be a case of having an optional config dialog to setup where .xls may live and where they dont. Regards, Michael. On 4/17/07, Bree VanOss <[EMAIL PROTECTED]> wrote: Hi, I've started looking at the JBoss Rules 3.1-M1 Eclipse plugin to get an idea of how much migration work I have to look forward to. The first issue I ran into is that it appears the Drools Builder is validating every Excel (.xls) file I have in my source path. Is this a design decision and if so, how can I "hide" non-decision table .xls files from the Drools builder? I've tried excluding them from the Eclipse Source Path using a "source exclusion rule", but that didn't seem to work. Thanks, Bree ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] column contraint + java bean
with predicate or evals, or preferably try and write your information
relationally not nested.
Mark
[EMAIL PROTECTED] wrote:
hi all,
having trouble with Drools 3.x syntax.
currently using one fact in working memory that is a aggregate of many
java beans. However when using the column constraint syntax it does not
seem to allow nested getXXX on the column constraint.
I have it working using predicate but it just seems verbose.
i would like to be able to fire rule when
the table object has a player count > 0 and the Table.getDealer.getFlop()
== null
how is this done on Drools 3.x?
ie.
public class Table{
int playerCount;
Dealer dealer;
Collection players;
}
rule "start"
no-loop true
when
table : Table( playerCount > 0 , dealerFlop :
dealer->(dealerFlop.getFlop() == null ) )
then
System.out.println( "start:" + table.getDealer().getFlop() );
end
many thanks
-lp
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[rules-users] column contraint + java bean
hi all,
having trouble with Drools 3.x syntax.
currently using one fact in working memory that is a aggregate of many
java beans. However when using the column constraint syntax it does not
seem to allow nested getXXX on the column constraint.
I have it working using predicate but it just seems verbose.
i would like to be able to fire rule when
the table object has a player count > 0 and the Table.getDealer.getFlop()
== null
how is this done on Drools 3.x?
ie.
public class Table{
int playerCount;
Dealer dealer;
Collection players;
}
rule "start"
no-loop true
when
table : Table( playerCount > 0 , dealerFlop :
dealer->(dealerFlop.getFlop() == null ) )
then
System.out.println( "start:" + table.getDealer().getFlop() );
end
many thanks
-lp
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[rules-users] JBoss Rules IDE 3.1-M1 - Validating all *.xls files in source path?
Hi, I've started looking at the JBoss Rules 3.1-M1 Eclipse plugin to get an idea of how much migration work I have to look forward to. The first issue I ran into is that it appears the Drools Builder is validating every Excel (.xls) file I have in my source path. Is this a design decision and if so, how can I "hide" non-decision table .xls files from the Drools builder? I've tried excluding them from the Eclipse Source Path using a "source exclusion rule", but that didn't seem to work. Thanks, Bree ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] conways game of life
I have just moved Jeff Brown's "Conways Game of Life" to a stateful example, this is now the best place to look to understand jboss rules. It's also good to compare this stateful implementation to the old stateless version. Trunk introduces a new feature to help deal with recursion "lock-on-active" which stops a rule being able to create activations while it's agenda-group/rule-flow-group has focus - so it's a much stronger no-loop. Probably the most important thing this example shows is how to think relationally, the old example used nested properties and sets to maintain the "neighbour" information; this example shows how to achieve the same but expressing it relationally, using the Neighbor relation class, further it shows how we can exploit the the cross-product relational information to drive the engine without us having to write loops. Currently the example is using agenda-groups to drive execution flow, I'm now in the process of moving this to rule-flow-groups. You'll need trunk to be able to run this, so checkout: http://anonsvn.labs.jboss.com/labs/jbossrules/trunk/ Make sure you have maven 2.0.6 installed and then type the following from the root directory: mvn clean install -Declipse=true The eclipse plugin will now be built in the drools-eclipse/target directory, so open that up and unzip into your eclipse install (make sure you use -clean to start eclipse). Then import drools-examples and "run as application" the ConwayGUI class. I plan to do a blog or two on how this exampe works, and my next challenge will be to migrate the pacman game to jboss rules. Mark -- Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in UK and Wales under Company Registration No. 3798903 Directors: Michael Cunningham (USA), Charlie Peters (USA) and David Owens (Ireland) package org.drools.examples import org.drools.examples.conway.Cell; import org.drools.examples.conway.CellGrid; import org.drools.examples.conway.Neighbor; import org.drools.examples.conway.Phase; import org.drools.examples.conway.CellState; import org.drools.WorkingMemory; import org.drools.common.InternalWorkingMemoryActions; import org.drools.RuleBase; rule "register north east" agenda-group "register neighbor" when CellGrid( $numberOfColumns : numberOfColumns ) $cell: Cell( $row : row > 0, $col : col < ( $numberOfColumns - 1 ) ) $northEast : Cell( row == ($row - 1), col == $col ) then assert( new Neighbor( $cell, $northEast ) ); assert( new Neighbor( $northEast, $cell ) ); end rule "register north" agenda-group "register neighbor" when $cell: Cell( $row : row > 0, $col : col ) $north : Cell( row == ($row - 1), col == $col ) then assert( new Neighbor( $cell, $north ) ); assert( new Neighbor( $north, $cell ) ); end rule "register north west" agenda-group "register neighbor" when $cell: Cell( $row : row > 0, $col : col > 0 ) $northWest : Cell( row == ($row - 1), col == ( $col - 1 ) ) then assert( new Neighbor( $cell, $northWest ) ); assert( new Neighbor( $northWest, $cell ) ); end rule "register west" agenda-group "register neighbor" when $cell: Cell( $row : row > 0, $col : col > 0 ) $west : Cell( row == $row, col == ( $col - 1 ) ) then assert( new Neighbor( $cell, $west ) ); assert( new Neighbor( $west, $cell ) ); end rule "Kill The Lonely" agenda-group "evaluate" no-loop when # A live cell has fewer than 2 live neighbors theCell: Cell(liveNeighbors < 2, cellState == CellState.LIVE, phase == Phase.EVALUATE) then theCell.setPhase(Phase.KILL); modify( theCell ); end rule "Kill The Overcrowded" agenda-group "evaluate" no-loop when # A live cell has more than 3 live neighbors theCell: Cell(liveNeighbors > 3, cellState == CellState.LIVE, phase == Phase.EVALUATE) then theCell.setPhase(Phase.KILL); modify( theCell ); end rule "Give Birth" agenda-group "evaluate" no-loop when # A dead cell has 3 live neighbors theCell: Cell(liveNeighbors == 3, cellState == CellState.DEAD, phase == Phase.EVALUATE) then theCell.setPhase(Phase.BIRTH); modify( theCell ); end rule "reset calculate" agenda-group "reset calculate" when then WorkingMemory wm = drools.getWorkingMemory(); wm.getAgenda().clearAgendaGroup( "calculate" ); end rule "kill" agenda-group "kill" no-loop when theCell: Cell(phase == Phase.KILL) then
RE: [rules-users] many response
You need to remember that a rule runs every time the patterns are matched.
For example:-
rule "example"
when
$a : ObjectA()
$b : ObjectB()
then
System.out.println("Rule 'example' ran");
end
Working Memory:-
1 - ObjectA
2 - ObjectA
3 - ObjectB
4 - ObjectB
The rule will run four times; once for each combination of ObjectA and ObjectB
(1, 3) (1, 4) (2, 3) and (2, 4).
Object models are flattened in Working Memory so if you need to impose a
relationship you need to add this to the rule. For example:-
[one-to-one mapping] ObjectA has one child ObjectB.
Method suggestion (returns an instance of ObjectB): ObjectA.getObjectB();
rule "example"
when
$b : ObjectB()
$a : ObjectA(objectB == $b)
then
System.out.println("Rule 'example' ran");
end
[one-to-many mapping] ObjectA has many child ObjectB.
Method suggestion (returns a List): ObjectA.getObjectBs();
rule "example"
when
$b : ObjectB()
$a : ObjectA(objectBs contains $b)
then
System.out.println("Rule 'example' ran");
end
Check that this is not the cause of your multiple unexpected executions.
With kind regards,
Mike
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of fakhfakh
ismail
Sent: 13 April 2007 18:22
To: jboss rules
Subject: [rules-users] many response
Hello,
First sorry for my bad english
when I execute a regle I get many response I don't know why?
Example:
rule "userrole"
when
user1: BnUserValue(nameuser : name)
and
Role : BnRoleValue()
and
ActiviteOut : BnNodeValue(bnRole == Role,executor == nameuser )
and
ActiviteIn : BnNodeValue(bnRole == Role )
and
lien: BnEdgeValue(outBnNode == ActiviteOut,inBnNode ==ActiviteIn )
then
System.out.println("cette personne "+user1.getName()+ " ne peut pas
executer cette activiter");
end
the execution result
cette personne ismail ne peut pas executer cette activiter
cette personne ismail ne peut pas executer cette activiter
cette personne ismail ne peut pas executer cette activiter
cette personne ismail ne peut pas executer cette activiter
cette personne ismail ne peut pas executer cette activiter
cette personne ismail ne peut pas executer cette activiter
so the result is repeat 6 I don't know why?
thank for your help
Ismail
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