Order of Execution on Messages
by gboro54
We are currently authoring rules using Drools 5.3 and using jBPM 5.2 for
orchestration. The situation we have is as follows: Certain groups of rules
can execute on n number of messages in any order(i.e the order in which the
consequences occur does not matter). The problem comes in later in the
process when those same n messages need to have their consequences happen in
a certain order. Is there a good way to handle this? We have thought about
appending messages to a queue and just operating on one message at a time
however this seems slow. In addition when utilizing jBPM and drools what is
the best way to batch data in and out of the session. I understand starting
a new session is cheap but was hoping there may be a way to have jBPM insert
n records at a time and just continue to read from the db until no more
records are returned.
TIA!
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13 years, 10 months
Drools facts using POJO accessor methods error
by aliosha79
Hi,
i have some troubles to undestand how drools processes FACTS. I have a POJO
class resulted from an UnMarshal jaxb processing like this:
public MyClass {
protected String className = "Class1";
public getClassName(){
return className;
}
public setClassName(String className){
this.className = className
}
}
Now i have to compose a drl file with a rule like this:
when
$Class : MyClass()
eval ($Class.getClassName() == "Class1")
then
System.out.println("ok!!!");
end
This syntax doesn't rise errors BUT doesn't match the real name... no ok
message are printed.
when
$Class : MyClass (getClassName() == "Class1")
then
System.out.println("ok!!!");
end
This syntax raises me a null pointer exception!!!
What's the right syntax?
Can i use the accessor methods building drools facts?
Thanks a lot!
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13 years, 10 months
jboss tohu
by Olfa h
hi,
can someone help me to deploy jboss tohi 1.2.0 into jboss 4.3.2 and eclipse
indigo ?????????????????
thx
13 years, 10 months
A problem in sliding windows.
by Hassan
when I was testing the sliding windows, I was blocked becouse this concept
doesn't work for me, It's becouse of my misunderstanding of the concept, I
looking for the error which I do:
for exemple:
==> the rule:
*/
rule "sliding windows"
when
$a : Event1() over window:time(2s)
then
System.out.println("ok");
end /*
==> Events
Event1 ev1=new Event1((long)1000,(long)2000); // the event will occur in 1s
and finish in 3s
Event1 ev2=new Event1((long)3000,(long)4000); // the event will occur in 3s
and finish in 4s
session.insert(ev1);
session.insert(ev2);
clock.advanceTime(4, TimeUnit.SECONDS); // we are now in 4s so only event
that happen in [2s,4s] have
session.fireAllRules(); // to fire -ev2-.
// But the probleme that, it gives me 2 ok so the 2 object are fired !! I
don't inderstand why ??
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13 years, 10 months
CLOUD mode Vs Stream Mode.
by Hassan
Hello,
It's clair that to work with thae events we have to put our base
configuration into STREAM mode like this:
*/KnowledgeBaseConfiguration config =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
config.setOption( EventProcessingOption.STREAM );/*
But in my code bellow I didn't use this mode and I didn't use Entry-points,
Although my events work very well !!
Help please !!
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13 years, 10 months
POJO accessors method in Drools facts
by aliosha79
Hi,
i have some troubles to undestand how drools processes FACTS. I have a POJO
class resulted from an UnMarshal jaxb processing like this:
public MyClass {
protected String className = "Class1";
public getClassName(){
return className;
}
public setClassName(String className){
this.className = className
}
}
Now i have to compose a drl file with a rule like this:
when
$Class : MyClass()
eval ($Class.getClassName() == "Class1")
then
System.out.println("ok!!!");
end
This syntax doesn't rise errors BUT doesn't match the real name... no ok
message are printed.
when
$Class : MyClass (getClassName() == "Class1")
then
System.out.println("ok!!!");
end
This syntax raises me a null pointer exception!!!
What's the right syntax?
Can i use the accessor methods building drools facts?
Thanks a lot!
--
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13 years, 10 months
CLOUD mode Vs Stream Mode.
by Hassan
Hello,
It's clair that to work with thae events we have to put our base
configuration into STREAM mode like this:
*/KnowledgeBaseConfiguration config =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
config.setOption( EventProcessingOption.STREAM );/*
But in an exemple, I didn't use this mode and I didn't use Entry-points,
Although my events work very well !!
Help please !!
--
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13 years, 10 months
