[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>