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</o:shapelayout></xml><![endif]--></head><body lang=IT link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Dear all,<br>I'm trying to develope a cep system using drools and java.<br><br></span>On my system, I instantiated the drools engine in Stream mode<br>and catch my events (called SimpleEvents and composed by (String id, Long timestamp, String data)) correctly.<br><br>Now I'm trying to create a rule able to match simple pattern like A -> B or A -> B -> C<br><br>Using the feature "after", I am able to know if eventB is preceded by a eventA .. but this rule match even the pattern: A -> .....(events of any kind different from B)... -> B<br><br><br>Question:<br><br>There's a way to know when (if) eventA is strictly followed by eventB ?<br><br>Thanks in advance ;)<br><br>--Antonello<o:p></o:p></p></div></body></html>