Drools Expert 5 OSGi
by jflamy
I want to manage Drools Expert rules with Drools Guvnor. My understanding is
that requires the use of Drools Expert version 5.
I also need to use an OSGi-packaged version of Drools Expert.
I saw a forum posting in 2010 alluding to such a beast, but the springsource
forums only provide 4.0.7.
Is there a ready-made OSGi bundle for drools expert 5, or alternately
specific instructions for building one ?
Jean-François Lamy
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14 years, 2 months
MVEL expression
by Femke De Backere
Hi,
The following expression keeps returning the error [112,32]: [ERR 103]
Line 112:32 no viable alternative at input '+' in rule "RuleFlow-Split-
masterproef.ruleflows.shortsedation-18-22" in pattern Patient:
Patient(sedation.ultiva+0.02 > 0.1)
with sedation.ultiva returning a double
What am I doing wrong?
Thx,
Femke
14 years, 3 months
Re: [rules-users] Firing Mulitple packages
by Esteban Aliverti
Could you post the way you are using to add kassets to kbase?
El ago 13, 2010 12:20 p.m., "Vignesh" <viki.ccc(a)gmail.com> escribió:
Hi Esteban,
I have tried the same logic by adding all the packages in my application in
to the kbase and executed the same, but only the drl file got loaded in it,
other kassets like dsl, ruleflow present in it were not added to the same.
Do we need to add everything separetly?
Kindly let me know whether im missing something here.
Thanks,
Vignesh
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14 years, 3 months
Problem with DroolsFlow transaction
by HMandic
I have a problem with transaction manager in drools flow (at least I think
so).
I'm running an EJB3 application in Jboss AS 5.1.0GA with Postgres 8.4.4 as
database. I use one schema for my data and another for drools data. The
application itself is also split in two projects, one for my utility classes
that interact with drools and the other for my application that uses those
utility classes.
I'm using the same datasource and transaction type is JTA.
I have an object that holds a reference to processID from drools flow as one
of its fields. When I invoke my method to create that object (in a stateless
session bean), a transaction is opened and it lasts until the end of said
method. But somewhere inside that method I need to invoke
ksession.startProcess(processName, params) and then I get this:
java.lang.IllegalStateException: Wrong tx on thread: expected
TransactionImple < ac, BasicAction: -3f57ffd6:dfb:4c878d37:7e status:
ActionStatus.ABORTED >, actual null
at org.jboss.aspects.tx.TxPolicy.endTransaction(TxPolicy.java:157)
at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:87)
at
org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:190)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
.
.
.
Does that mean that I need to run the drools part in a separate thread?
I'm clueless...
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14 years, 4 months
Connection with Active Directory multiple organizational units
by G3
I am able to authenticate with Active Directory but with only a single
organizational unit but not with users of multiple organizational units
This is my organizational structure
+cn=test,cn=con
--+ou=Sample1
-----uid:user1,uid:user2
--+ou=Sample2
-----uid:user3,uid:user4
--+roles
-----admin:uid:user1,user3
-----user:uid:user2,user4
I have set the admin rights accordingly in Guvnor.
I am using Jboss Guvnor standalone 4.2.3 and I am trying to connect
multiple organizational units using JAAS
my login-config.xml
---------------------
<application-policy name="adConnection">
<authentication>
<login-module code="org.jboss.security.auth.spi.LdapExtLoginModule"
flag="required" >
<module-option
name="java.naming.provider.url">ldap://c.test.com:389/</module-option>
<module-option
name="java.naming.security.authentication">simple</module-option>
<module-option
name="bindDN">CN=Administrator,CN=Users,dc=test,dc=com</module-option>
<module-option name="bindCredential">password</module-option>
<module-option name="baseCtxDN">OU=Sample1,dc=test,dc=com</module-option>
<module-option name="baseFilter">(CN={0})</module-option>
<module-option name="rolesCtxDN">OU=roles,dc=test,dc=com</module-option>
<module-option name="uidAttributeID">member</module-option>
<module-option name="matchOnUserDN">true</module-option>
<module-option name="roleFilter">(member={1})</module-option>
<module-option name="roleAttributeID">CN</module-option>
<module-option name="roleRecursion">-1</module-option>
</login-module>
<login-module code="org.jboss.security.auth.spi.LdapExtLoginModule"
flag="required" >
<module-option
name="java.naming.provider.url">ldap://c.test.com:389/</module-option>
<module-option
name="java.naming.security.authentication">simple</module-option>
<module-option
name="bindDN">CN=Administrator,CN=Users,dc=test,dc=com</module-option>
<module-option name="bindCredential">password</module-option>
<module-option name="baseCtxDN">OU=Sample2,dc=test,dc=com</module-option>
<module-option name="baseFilter">(CN={0})</module-option>
<module-option name="rolesCtxDN">OU=roles,dc=test,dc=com</module-option>
<module-option name="uidAttributeID">member</module-option>
<module-option name="matchOnUserDN">true</module-option>
<module-option name="roleFilter">(member={1})</module-option>
<module-option name="roleAttributeID">CN</module-option>
<module-option name="roleRecursion">-1</module-option>
</login-module>
</authentication>
</application-policy>
and my component.xml
-------------------------
<security:identity authenticate-method="#{authenticator.authenticate}"
jaas-config-name="adConnection"/>
I donot get any errors in server console during deployment but when login
,I cannot login into Guvnor and I get password or user name incorrect.Can
some one help me out
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14 years, 4 months
Drools 5 PseudoClock with StatelessKnowledgeSession
by Ben Scott
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I'm wanting to use the date-effective and date-expiry rule metadata to add date specific rule variants within my app. To test these I was planning on using the pseudo clock and setting the expected date prior to executing the rules within a StatelessKnowledgeSession. I can set the clock easily enough, but can't understand why the getSessionClock() method is missing? It's on the StatefulKnowledgeSession, but not on the Stateless.
I'm initialising the session like this:
SessionConfiguration sessionConfiguration = new SessionConfiguration();
sessionConfiguration.setClockType( ClockType.PSEUDO_CLOCK );
StatelessKnowledgeSession session = _testKnowledgeBase.newStatelessKnowledgeSession(sessionConfiguration);
The only thing I could think of to set the pseudo clock was to write a command something like:
private static class SetPseudoClockCommand implements org.drools.process.command.Command<Boolean> {
public Boolean execute(ReteooWorkingMemory session) {
// Set the clock to the current date
pseudoSessionClock.advanceTime(new DateTime().getMillis(), TimeUnit.MILLISECONDS);
// Add a couple of days
pseudoSessionClock.advanceTime(2, TimeUnit.DAYS);
return true;
}
}
But this doesn't appear to take any effect whilst rules are running.
Is there another way to get programmatic access to the session clock, or some better way of changing the underlying date prior to rule execution?
Ben.
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14 years, 5 months
Date validation in Guvnor
by mick00
Hi,
I want to validate the date format in my rule. I just want to check whether
my date is in the given format(yyyy-mm-dd) in my rule in Guvnor. Is it
possible to do such validation in Guvnor? I tried the same but got an
exception stating that the date is not in the given format(dd-MMM-yyyy). Can
someone suggest a solution as to how to validate the date in Guvnor?
Thanks,
mick
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14 years, 5 months
Fusion and open-ended intervals?
by Barry Kaplan
A fusion design question:
I have events that represent intervals. Initially the intervals are
open-ended (kind a like the current state of an entity). Other events are
matched "during" the interval and correlated. At some point the interval
will be closed (eg, a specific downtime interval is closed because the
device is no online again).
All the events in this system are immutable -- so if some property of an
event changes, it is cloned and modified in working-memory. For the case of
the interval events, initially the interval is inserted open-ended, and at
some point later closed and then modified.
This does not work with fusion however, since an event's duration is
maintained by the fact-handle not the event itself. Hence a modify with a
now closed interval (ie, a finite @duration) has no effect. I'm guessing the
temporal values are maintained the handle to ensure stable values for the
behaviors that trigger based on temporal values, which is reasonable.
So I'm looking for alternative designs. Some are:
1) Modeled the intervals as begin/end events, but that gets messy real
fast (have to correlate
the begin/end events somehow, can't use evaluators like 'includes' or
'during', etc).
2) Retract the interval event when it is closed (this way closed intervals
no longer correlate
with other incoming events). But then we really have a manually
maintained state machine
using only facts, and there can be no reasoning over a series these
interval events.
(eg, 3 downtimes longer than 2 minutes in the last hour).
Opinions?
-barry
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14 years, 5 months
Persistence of events
by Maciej Prochniak
Hello,
Is it possible to persist events (from drools fusion) with default jpa
mechanism? When I try to do this 'just like that' I get exception
like
org.drools.common.DefaultFactHandle incompatible with
org.drools.common.EventFactHandle
It seems that session marshaller is not really aware of certain objects
being events, not facts.
The code I try is more or less like:
UserTransaction ut = ...
StatefulKnowledgeSession session = JPAKnowledgeService
.newStatefulKnowledgeSession(kbase, null, env);
ut.begin()
session.insert(e1);
ut.commit();
StatefulKnowledgeSession sessionPersisted =
JPAKnowledgeService.loadStatefulKnowledgeSession( session.getId(),
kbase, null, env );
ut.begin()
sessionPersisted.insert(e2); (*) <- fails
ut.commit();
When I use session instead of sessionPersisted - it works fine, when
e2 is a fact, not an event - it also works
I know that it may be awkward to persist events which have time
limitations, but I want to use time limits in rules which are like few
days - so I want to have some persistence in case of server shutdown.
I would be grateful for any comment,
br,
maciek prochniak
14 years, 5 months
Log4j in the rules?
by granz＠MIT.EDU
Hi,
Is it possible to use Log4j inside the rules (RHS)?? (drl file)
Thanks,
Fabrice
14 years, 5 months
