[rules-users] Activation doubt

[Makewise - Vitor Rui Mendonça]

Hi again!

 

The problem occurred in Drools 5.1.0 M1 but I've tried with the latest snapshot (2010-05-11) and worked fine.

 

Thanks for your patience!

 

 

Vítor Mendonça Moreira
Analista / Programador
Direcção de Investigação e Desenvolvimento

Rua Dr. Francisco Sá Carneiro, nº. 4 r/c esq.
2500 - 206 - Caldas da Rainha
Tel: (+351) 262 832 196
Fax: (+351) 262 186 455
Web: www.makewise.pt
Uma empresa: Grupo Sousa Pedro <http://www.sousapedro.com>  

 

		

 

 

From: rules-users-bounces at lists.jboss.org [mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Makewise - Vitor Rui Mendonça
Sent: quinta-feira, 13 de Maio de 2010 10:24
To: Rules Users List
Subject: [rules-users] Activation doubt

 

Hi folks!

 

I'm having some trouble to understand activations.

My system receives transactions and I want to detect periods of time without transactions. If I don't have transactions for an hour, I want to sound an alarm.

 

I've wrote the following rules just to see how Drools works (I've tried sliding windows also but without success):

declare NoTransactions

      @role( event )

      timestamp: long

end

declare EngineStart

      @role( event )

      timestamp: long

end

declare Transaction

      @role( event )

      @expires( 1h )

end

rule "***start***"

      when

            not( EngineStart() ) 

      then

            insert( new EngineStart() );

            System.out.println("engine started");

end

rule "***notrx_after_start***"

      when

            $engineStart : EngineStart()

            not( NoTransactions() )            

            not(Transaction( this after [0s, 1h] $engineStart ) )

      then

            insert ( new NoTransactions() );

            System.out.println("no transactions for an hour since engine started");

end

rule "***notrx_after_trx***"

      when

            EngineStart()

            not( NoTransactions() )

            $transaction : Transaction()

            not( Transaction( this != $transaction, this after [0s, 1h] $transaction ) )

      then

            insert( new NoTransactions() );

            System.out.println("no transactions for an hour since last transaction ");

End

·         First rule inserts an Event when rule engine starts

·         Second rule detects absence of transactions since engine started

·         Third rule detects absence of transactions since last transaction

 

The testcase is simple (using pseudoclock):

·         00h00m: rule engine start

·         00h30m: insert a transaction

·         01h01m: notification of absence of transactions since engine started (not the desired behavior)

 

I've attached the logs and I can't understand how an Activation is cancelled and executed afterwards (without any creation).

 

Thanks for the time spent to read this email! J 

 

 



Vítor Mendonça Moreira
Analista / Programador
Direcção de Investigação e Desenvolvimento

Rua Dr. Francisco Sá Carneiro, nº. 4 r/c esq.
2500 - 206 - Caldas da Rainha
Tel: (+351) 262 832 196
Fax: (+351) 262 186 455
Web: www.makewise.pt
Uma empresa: Grupo Sousa Pedro <http://www.sousapedro.com>  



		

 

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