3:32 a.m.
Hi,
Suppose I have a rule as
rule "Rule1"
when
Message( message == "Hello" ) || Message( status == 0 )
then
System.out.println("then executed");
End
Then is there a way to find out which condition is satisfied? I.e. whether
message was equal to "Hello" or status was 0.
We are writing alert generation using rules engine, we need to specify in
the alert that because of which condition alert gets generated.
We are having multiple clauses in a single rule. So what is the correct way
to find the clause because of which alert is generated. We cannot keep them
in separate rule because we need to consider and\or conditions between these
clauses.
Thanks,
Ashwini
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7:12 a.m.
New subject: problem in rules 4.0.0.11754MR2
Hi,
I am using JBoss Rules 4.0.0.11754MR2 in an RAD 7.0 (Eclipse 3.2)
environment.
Cannot make it work, even examples...
Here is a message produces on all rules: The rule called <here goes rule
name> is not valid. Check for compile errors reported.
Here is a full stack trace:
Exception in thread "main" java.lang.IllegalArgumentException: The rule
called Hello World is not valid. Check for compile errors reported.
at
org.drools.common.AbstractRuleBase.addRule(AbstractRuleBase.java:363)
at
org.drools.reteoo.ReteooRuleBase.addRule(ReteooRuleBase.java:263)
at
org.drools.common.AbstractRuleBase.addPackage(AbstractRuleBase.java:293)
at
org.drools.examples.HelloWorldExample.readRule(HelloWorldExample.java:72
)
at
org.drools.examples.HelloWorldExample.main(HelloWorldExample.java:21)
After digging it further I found that in Rule class method isValid is
being called defiend as followes:
public boolean isValid() {
if ( this.consequence == null || !isSemanticallyValid() ) {
return false;
}
return true;
}
The debugger shows that this.consequence is null always! So rules are
always not valid.
Anyone saw this problem? Any idea how to resolve it?
Thanks a lot!
-Sergey
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9:16 a.m.
New subject: problem in rules 4.0.0.11754MR2
The consequence will be null if the java you used is invalid. When you
create the Package check the errors before adding it to the rule base as
you can get a lot more info. In fact thats good "best practice" always
verify that the package errors are emtpy before attempting to use the
package.
Mark
Manukyan, Sergey wrote:
Hi,
I am using JBoss Rules 4.0.0.11754MR2 in an RAD 7.0 (Eclipse 3.2)
environment.
Cannot make it work, even examples...
Here is a message produces on all rules: The rule called <here goes
rule name> is not valid. Check for compile errors reported.
Here is a full stack trace:
Exception in thread "main" _java.lang.IllegalArgumentException_: The
rule called Hello World is not valid. Check for compile errors reported.
at
org.drools.common.AbstractRuleBase.addRule(_AbstractRuleBase.java:363_)
at
org.drools.reteoo.ReteooRuleBase.addRule(_ReteooRuleBase.java:263_)
at
org.drools.common.AbstractRuleBase.addPackage(_AbstractRuleBase.java:293_)
at
org.drools.examples.HelloWorldExample.readRule(_HelloWorldExample.java:72_)
at
org.drools.examples.HelloWorldExample.main(_HelloWorldExample.java:21_)
After digging it further I found that in Rule class method isValid is
being called defiend as followes:
*public* *boolean* isValid() {
*if* ( *this*.consequence == *null* || !isSemanticallyValid() ) {
*return* *false*;
}
*return* *true*;
}
The debugger shows that *this*.consequence is null always! So rules
are always not valid.
Anyone saw this problem? Any idea how to resolve it?
Thanks a lot!
-Sergey
**********************
** LEGAL DISCLAIMER **
**********************
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legally privileged, confidential or proprietary
information. If you are not the intended recipient(s),
or the employee or agent responsible for delivery of
this message to the intended recipient(s), you are
hereby notified that any dissemination, distribution
or copying of this E-mail message is strictly
prohibited. If you have received this message in
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------------------------------------------------------------------------
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12:03 p.m.
New subject: problem in rules 4.0.0.11754MR2
Thank you Mark,
I added the error checking code as advised :
//read in the source
final Reader source = new InputStreamReader(
HelloWorldExample.class.getResourceAsStream( "HelloWorld.drl" ) );
final PackageBuilder builder = new PackageBuilder();
//this will parse and compile in one step
//NOTE: There are 2 methods here, the one argument one is for
normal DRL.
builder.addPackageFromDrl( source );
//get the compiled package (which is serializable)
final Package pkg = builder.getPackage();
PackageBuilderErrors pbe = builder.getErrors();
DroolsError[] de = pbe.getErrors();
for (int i = 0; i < de.length; i++) {
System.out.println("ERROR["+i+"]:" + de[i]);
}
System.out.println("pkg.getErrorSummary() : " +
pkg.getErrorSummary());
//add the package to a rulebase (deploy the rule package).
final RuleBase ruleBase = RuleBaseFactory.newRuleBase();
ruleBase.addPackage( pkg );
And here is what I got:
pkg.getErrorSummary() : null
Exception in thread "main" java.lang.IllegalArgumentException: The rule
called Hello World is not valid. Check for compile errors reported.
at
org.drools.common.AbstractRuleBase.addRule(AbstractRuleBase.java:363)
at
org.drools.reteoo.ReteooRuleBase.addRule(ReteooRuleBase.java:263)
at
org.drools.common.AbstractRuleBase.addPackage(AbstractRuleBase.java:293)
at
org.drools.examples.HelloWorldExample.readRule(HelloWorldExample.java:72
)
at
org.drools.examples.HelloWorldExample.main(HelloWorldExample.java:21)
So basically - no errors...? Or ... am I showing errors correctly?
Also could you please specify what do you mean under "java is invalid".
You mean JDK level? I am using JANINO 2.5.6 compiler in JVM 1.4 .. is
this correct configuration?
Thanks again!
-Sergey
________________________________
From: rules-users-bounces(a)lists.jboss.org
[mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Mark Proctor
Sent: Friday, June 08, 2007 10:17 AM
To: Rules Users List
Subject: Re: [rules-users] problem in rules 4.0.0.11754MR2
The consequence will be null if the java you used is invalid. When you
create the Package check the errors before adding it to the rule base as
you can get a lot more info. In fact thats good "best practice" always
verify that the package errors are emtpy before attempting to use the
package.
Mark
Manukyan, Sergey wrote:
Hi,
I am using JBoss Rules 4.0.0.11754MR2 in an RAD 7.0 (Eclipse 3.2)
environment.
Cannot make it work, even examples...
Here is a message produces on all rules: The rule called <here goes rule
name> is not valid. Check for compile errors reported.
Here is a full stack trace:
Exception in thread "main" java.lang.IllegalArgumentException: The rule
called Hello World is not valid. Check for compile errors reported.
at
org.drools.common.AbstractRuleBase.addRule(AbstractRuleBase.java:363)
at
org.drools.reteoo.ReteooRuleBase.addRule(ReteooRuleBase.java:263)
at
org.drools.common.AbstractRuleBase.addPackage(AbstractRuleBase.java:293)
at
org.drools.examples.HelloWorldExample.readRule(HelloWorldExample.java:72
)
at
org.drools.examples.HelloWorldExample.main(HelloWorldExample.java:21)
After digging it further I found that in Rule class method isValid is
being called defiend as followes:
public boolean isValid() {
if ( this.consequence == null || !isSemanticallyValid() ) {
return false;
}
return true;
}
The debugger shows that this.consequence is null always! So rules are
always not valid.
Anyone saw this problem? Any idea how to resolve it?
Thanks a lot!
-Sergey
**********************
** LEGAL DISCLAIMER **
**********************
This E-mail message and any attachments may contain
legally privileged, confidential or proprietary
information. If you are not the intended recipient(s),
or the employee or agent responsible for delivery of
this message to the intended recipient(s), you are
hereby notified that any dissemination, distribution
or copying of this E-mail message is strictly
prohibited. If you have received this message in
error, please immediately notify the sender and
delete this E-mail message from your computer.
________________________________
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6385
days inactive
6385
days old
3 comments
3 participants
participants (3)
-
Ashwini Joshi -
Manukyan, Sergey -
Mark Proctor