Re: [rules-users] Rules trace questions
Logging activation *creations* may not be a good idea if you want to log
rule firings. Creations happen when facts are inserted/updated/retracted,
and the log may not even reflect what will really fire, since pending
activations
might even be removed. Even if they all fire, the order of creations can be
anything compared to firings.
Log entries are written sequentially in chronological order.
Triggering the writing of a log to disk by inserting a fact (Output) may
cause confusion since there's no guarantee that the firing according to
the new Output() will happen *next*. Other activations may result in firings
in between.
A good way for creating a log is to finish it from Java code, after return from
fireAllRules().
Finally, you are using classes from the unstable part. AFAIK, the current
stable class to use is org.drools.logger.KnowledgeRuntimeLogger. This
has only a close() method, and it will not continue to log. (But this
is consistent
with the previous paragraph.)
-W
On 24 November 2010 12:12, Anais Martinez <amartinez(a)iti.upv.es> wrote:
Hello.
I'm trying to get the rules trace in execution by using
WorkingMemoryFileLogger. I am using the Hello word example, and I call the
WorkingMemoryFileLogger.wirteToDisk() in the RHS of rules. My modified drl
file is:
import com.sample.DroolsTest.Message;
global org.drools.audit.WorkingMemoryFileLogger rulesLogger
declare Output
@role (event)
end
rule "Hello World"
when
m : Message( status == Message.HELLO, myMessage : message )
then
System.out.println( myMessage + ": Hello message" );
m.setMessage( myMessage );
m.setStatus( Message.GOODBYE );
update( m );
end
rule "GoodBye"
when
Message( status == Message.GOODBYE, myMessage : message )
then
System.out.println( myMessage + ": Goodbye message" );
Output o= new Output();
insert(s);
end
rule "log trace"
when
o:Output( )
then
System.out.println("Loggin trace");
rulesLogger.writeToDisk();
end
I have filtered the logger to see only LogEvent.ACTIVATION_CREATED, and I
set the global rulesLogger in Main(). If I insert 2 messages, 2 "event.log"
files and one "test.log" appears. I have several questions (sorry if I say
nonsense):
First. How do I read the trace for each fire of "rule to log trace"? I mean,
the trace for "rule to log trace" is written forward (from event
insertion/updating/removing to "log trace" activation) or backward (from
"log trace" activation to event insertion/updating/removing)?
Second. Each event.log appears in each "log trace" activation because I am
writing the trace in the RHS. Am I right? Can I use that in order to read
the trace for each individual activation of "log trace"?
Third. I only allow LogEvent.ACTIVATION_CREATED, but some ObjectLogEvent
appear in the test.log file, but not in the event.log files. Why?
Thanks in advance.
--
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