FireUntilHalt
by crajor
I have a fairly complicated drools program and I want to introduce temporal
reasoning to it. I spent a bit of time writing some proof-of-concept
programs to get the feel of fusion and then tried to slowly introduce things
into my original drools program. When I changed my program from using
fireAllRules() to using fireUntilHalt() on a separate thread, I suddenly get
failures in my unit tests. (My first thought was that there was a race
condition between my unit tests and the thread calling fireUntilHalt() so I
introduced a delay before my unit tests but no luck)
Here are some of the behaviors I am seeing.
1) I occasionally get nullpointerexception from the thread running
fireUntilHalt()
2) My lock-on-active rules aren't firing
I have banged my head on this a while with no success. (I even tried
putting fireAllRules() in a loop because of suggestions I saw but no luck
and same behavior). My questions are, Is there a secret to using
fireUntilHalt() that I am not aware of? Can anybody point me to where I can
educate myself on its proper use?
BTW no persistence and no spring in the code at this point.
Thanks, in advance, for any help you can provide.
Craig
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13 years, 11 months
Rule refiring issue !
by abhinay_agarwal
hey all,
i have a scenario like this..
rule "rule1"
agenda-group "1"
salience 0
when
//something
then
setFocus("2")
end
rule "rule1"
agenda-group "1"
salience -1
when
//something
then
//something
end
rule "rule3"
agenda-group "2"
salience 0
when
//something
then
//something
end
when initially my rule 1 gets fired, it executes its work and sets focus on
rule 3....
After the execution of rule 3, when it goes back to agend-group "1"..the
rule 1 is fired again..
can i do something to stop the firing of rule 1 again..i want my rule 2 to
just get fired when the focus is set again to agenda-group "1"..
i have tried using "no-loop" and "lock-on active", but they dont help in my
case !!
thanks,
Abhinay
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13 years, 11 months
[Solved] Concurrency bug in 5.4.0.Final
by Edson Tirelli
Hi all,
Just a heads up, in case you are using the community release 5.4.0.Final
in a multi-threaded application, be aware that we found a quite serious
racing condition bug:
https://issues.jboss.org/browse/JBRULES-3573
The bug is now fixed in 5.4.x branch, so I strongly recommend that you
build from source and use that instead. The bug was also fixed in the
up-stream branch and will be released in 5.5.0.
IMPORTANT: if you are a Red Hat subscriber, you don't need to do anything
as the problem did not exist in the product release.
Edson
--
Edson Tirelli
JBoss Drools Core Development
JBoss by Red Hat @ www.jboss.com
13 years, 11 months
Issue
by salt
I have two objects vehicles and transactions. I am fetching values of all
transactions from db and using an list and setting in the vehicles object.
for example let have three columns and four rows..
name date price
A 12/07 700
B 12/07 100
D 13/07 100
C 14/07 150
i will be looping like this drools spreadsheet.
$v1:vehicles() transaction() from$v1.transactionList
Now i need to check for C in names and if there is D above to that need to
set true.
SCENARIOS
A,B,C,D,B - for this false needs to be set
A,B,C,D,C - set true
how can we do this in drools spreadsheet
is this possibe.?
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13 years, 11 months
Error occured when replacing commons-lang2.4 with commons-lang3-3.1 in Guvnor 5.4.0 Final
by chrisLi
Hi, All
I am using Guvnor 5.4.0 Final with Tomcat 6.0.35. And I wanted to replace
commons-lang2.4 with commons-
lang3-3.1, so I overwrote the commons-lang2.4 jar file in Guvnor's
WEB-INF/lib directory with commons-
lang3-3.1.jar. However an error like follows occured:
Service method 'public abstract long
org.drools.guvnor.client.rpc.AssetService.getAssetCount(org.drools.guvnor.client.rpc.AssetPageRequest)
throws com.google.gwt.user.client.rpc.SerializationException' threw an
unexpected exception: java.lang.NoClassDefFoundError:
org/apache/commons/lang/StringUtils org/apache/commons/lang/StringUtils
I have restarted Guvnor.
Any suggestion will be appreciated, thank you very much.
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13 years, 11 months
