Re: [rules-users] Bad Gateway at http://www.jboss.org/drools

[Syargey]

Thanks.



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[rules-users] Bad Gateway at http://www.jboss.org/drools

[Syargey]

I can't access  http://www.jboss.org/drools http://www.jboss.org/drools  
for two days :-(

The error message is sjown:


Bad Gateway

We're experiencing a problem with one of the servers behind our gateway.

Please try again in a while.





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Re: [rules-users] facts custom sort

[Syargey]

I updated Drools plug-in and currently the error is not shown.

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Re: [rules-users] facts custom sort

[Syargey]

I am still wondering why the following query doesn't work:

query sortFactsQuery1
$tm: TreeMap()
from accumulate( $f: Fact(),
 init( TreeMap map = new TreeMap(); ),
   action( map.put(factKey($f), $f); ),
   reverse( map.remove(factKey($f)); ),
   result( map ) )
$sortedFacts: Collection() from $tm.values()
end

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Re: [rules-users] facts custom sort

[Syargey]

Thank you! Quite clear

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Re: [rules-users] facts custom sort

[Syargey]

You are right. Your query is better 

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Re: [rules-users] facts custom sort

[Syargey]

But I didn't check when I answered: 
[ERR 101] Line 34:31 no viable alternative at input ')' in query
sortFactsQuery1 in pattern TreeMap

I tried:

query sortFactsQuery1
$tm: TreeMap()
from accumulate( $f: Fact(),
 init( TreeMap map = new TreeMap(); ),
   action( map.put(factKey($f), $f); ),
   reverse( map.remove(factKey($f)); ),
   result( map ) )
$sortedFacts: Collection() from $tm.values()
end

It doesn't return any results.

But the following query works:

query sortFactsQuery2
$tm: TreeMap()
from accumulate( $f: Fact(),
 init( TreeMap map = new TreeMap(); ),
   action( map.put(factKey($f), $f); ),
   reverse( map.remove(factKey($f)); ),
   result( map ) )
$sortedFacts: List()
from accumulate( $f: Fact() from $tm.values(),
collectList( $f ) )
end




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Re: [rules-users] facts custom sort

[Syargey]

Sorry, I didn't want to blame you.

I have to agree. Your query works, I have just run it.

But eclipse shows the error given above.
Probably, I have some problems with environment.

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Re: [rules-users] facts custom sort

[Syargey]

I don't want to sort facts outside of drools rules. The sorting is part of
business requirements. My opinion is that is not a good thing to keep parts
of business logic in different places.

I spent some time to figure out how it is possible to sort a collection of
facts and here is my solution:
---
function String factKey(Fact f) 
{
return String.format( %010d~~%s~~%s, f.getRank(), f.getName(),
f.getValue() );
}

query sortFactsQuery
$factsMap: HashMap()
from accumulate( $f: Fact(),
 init( HashMap map = new HashMap(); ),
   action( map.put(factKey($f), $f); ),
   reverse( map.remove(factKey($f)); ),
   result( map ) )
$sortedKeyList: TreeSet() 
from collect( String() from $factsMap.keySet() )
$sortedFacts: List()
from accumulate( $key: String() from $sortedKeyList,
collectList( $factsMap.get( $key ) ) )
end
---

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[rules-users] Call query from other query

[Syargey]

I read in Drools guide, that queries can now call other queries.

But the guide doesn't give much details, mostly paying attention to a rather
specific case.

I have two queries having common parts and try to figure out how to  get rid
of duplicate code.

Here is the simplified form of queries I'd like to have:
-

query query1
$facts: List()
from collect( Fact( name == name1 ) )
end

query query2
$l: List()
from collect( Fact( value == 1 ) from ?query1() )
end

-

query2 syntax is invalid and and it is not clear for me how $facts from
query1 can be accessed in query2.


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[rules-users] facts custom sort

[Syargey]

Hello all,

I experienced a problem I can't solve.

After rules firing I got a number of facts of certain type.

I would like to get a collection of facts sorted by custom field with a
query.

Drools guide proposes to sort facts by a rule like:

rule Rule 03   
when
$number : Number( )
not Number( intValue  $number.intValue )
then
System.out.println(Number found with value: +$number.intValue() ); 
retract( $number );
end

But it doesn't suit me:
1) I can't retract facts from session
2) I need to get sorted collection with a query which doesn't have 'then'
part.

Is there any method to get custom sorted collection with a query?



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Re: [rules-users] decision tables and default rules for case when part of LHS failes for other rules

[Syargey]

First I wanted to add parameters from condition 1 column to a session and
to add condition which makes default rule true if no parameter in session is
equal to an entry argument.

But I couldn't find a way to add a parameter from a condition expression to
a session.

Is it possible?

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Re: [rules-users] decision tables and default rules for case when part of LHS failes for other rules

[Syargey]

In fact, I don't need to have default values if no values were found.

I need default values if part of LHS is never true.

If I have the rule:

rule rule_11
when
Object1( constraint1 )
Object2( constraint2 )
then 
insert(new Result());
end

I'd like to have rule applying when Object1( constraint1 ) fails.

In decision table.

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Re: [rules-users] decision tables and default rules for case when part of LHS failes for other rules

[Syargey]

Yes. The rule is good for DRL.

But I need to have it in decision table.

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Re: [rules-users] decision tables and default rules for case when part of LHS failes for other rules

[Syargey]

It doesn't suit :( 

A blank column causes an action applies additionally.

But I need it applies only if no other conditions from first column is true.

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Re: [rules-users] decision tables and default rules for case when part of LHS failes for other rules

[Syargey]

It is in XLS decision table.

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