[ANN]VTD-XML 2.8
by Jimmy Zhang
VTD-XML 2.8 has been released. Please visit https://sourceforge.net/projects/vtd-xml/files/ to download the latest version.
a.. Expansion of Core VTD-XML API
a.. VTDGen adds support for capturing white spaces
b.. VTDNav adds support for suport for getContentFragment(), recoverNode() and cloneNav()
c.. XMLModifier adds support for update and reparse feature
d.. AutoPilot adds support for retrieving all attributes
e.. BookMark is also enhanced.
b.. Expansion of Extended VTD-XML API
a.. Add content extraction ability to extended VTD-XML
b.. VTDNavHuge now can call getElementFragment() and getElementFragmentNs()
c.. VTDGenHuge adds support for capturing white spaces
c.. XPath
a.. Adds comment and processing instruction support for nodes, and performance enhancement
b.. Adds namespace axis support .
c.. Adds round-half-to-even()
d.. A number of bug fixes and code enhancement
15 years, 11 months
Extending the "validation of rules" functionality in Guvnor
by Premkumar Stephen
Hello everyone,
Currently, the validate functionality ensures that rules have proper
syntax.
it is possible to extend this functionality so that business use cases might
also be validated? Is there an API/examples to do that.
For eg, in our domain, an object X can be evaluated for 3 criteria ( a, b,
c )
However, we would need to prevent rules written which combine criteria b and
c
Rules can have the combinations ( a,b,c, ab, ac ). Combinations ( bc and abc
) should not be allowed.
Regards,
Prem
15 years, 11 months
evaluation of null not consistent
by LJ in NJ
Hi;
I am trying to debug a situation in which a rule fires when it should not.
The rule is:
rule "DTR2_AOU_Mapping"
when
when
instance_0_Contact : Contact($var_0_guid : guid != null )
instance_1_Track : Track($var_1_aou : aouAsFloat != null &&
$var_3_platform_ptr : platform != null )
eval($var_3_platform_ptr.getGuid() == $var_0_guid )
then
:
:
The problem is the 2nd condition and the criteria "$var_1_aou : aouAsFloat
!= null ". When fired we get a Null Ptr Exception. When I examened the log
file in the Audit view, I see that the rule has fired even tho it clearly
states that $var_1_aou = null:
<org.drools.audit.event.ActivationLogEvent>
<type>4</type>
<activationId>DTR2_AOU_Mapping [3, 1]</activationId>
<rule>DTR2_AOU_Mapping</rule>
<declarations>
$var_3_platform_ptr=com.callc.das.kb.ASW.Contact@5b21ae2(3);
instance_1_Track=com.callc.das.kb.ASW.Track@1e071f47(3);
instance_0_Contact=com.callc.das.kb.ASW.Contact@5b21ae2(1);
$var_1_aou=null;
$var_0_guid=2139982358(1)
</declarations>
</org.drools.audit.event.ActivationLogEvent>
What makes matters worse is that the EXACT SAME RULE when running in a
different application will behave as expected. What I mean by this is that
we have embedded the Drools rule engine in two different Java applications,
both of which set-up and use the rule engine with the exact same constructs
and sequence of commands (e.g., use of a StatefulKnowledgeSession). I then
inserted the same information into both. One runs fine but the other
generates the log file shown above and throws :
org.drools.runtime.rule.ConsequenceException: java.lang.NullPointerException
at
org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:23)
at
org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:943)
at
org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:885)
at
org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1086)
:
:
Any suggestions regarding what is going on here would be most appreciated as
I am 100% stumped by this.
Thanks
Larry
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15 years, 11 months
Drools 5.1 M2 or final availability
by Metral Florent
Hi All,
I've seen on forums that Drools 5.1 M2 should be available end of March
and final should follow closely.
I can't find any informations on the status of these releases and I
can't find any roadmap for Drools project.
I'm particularily interested by BRMS feature.
Could you please provide me informations on the availability of next 5.1
release.
Regards,
Florent Metral
15 years, 11 months
Access to globals from WorkItemHandlers?
by Ed Staub
Do WorkItemHandlers not have access to globals by intent?
In Flow, at least from my perspective, most of the usefulness of globals
would be in WorkItemHandlers.
They'd probably need their own map - or a way of flagging names in the
"variable" map as globals - e.g., "*foo" means "the global foo".
If there's no counter-argument, I'll put a request in Jira.
BTW... thanks to the folks who contribute regularly here!
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15 years, 11 months
Guvnor Test Scenario Expectations
by AndreaLee
I am evaluating Drools 5 and Guvnor for a project and have a question
regarding Test Scenarios created in Guvnor.
Is it possible to configure a Test Scenario in Guvnor to fail if a rule that
is not explicitly expected is fired? I can not find a way of achieving this
without creating another expectation that specifies Rule X is not fired.
Example:
I have rules Rule A, Rule B, Rule C.
I have a Test Scenario which has the following expectation: Expect Rule A to
fire once.
I want this Test Scenario to fail if any other rule in addition to Rule A is
fired without having to specify the following additional expectations:
Expect Rule B to not fire, Expect Rule C to not fire.
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15 years, 11 months
Number of rules
by Bertrand Grottier
Hello,
What is the number of rules that can be integrated in Drools (using Excel for example) ?
I defined a template rules file, "fed" by an Excel file: a few thousand of rules already takes a while to "compile"...
Benoît
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15 years, 11 months
Guvnor in Websphere 6.1 setup, repository problem
by Tatonka2000
Hi all,
I've been trying to install Drools 5 in websphere 6.1, and followed some
documentation available on the wiki at:
http://community.jboss.org/wiki/DeployingGuvnor5OnWebSphere
That page did solve a lot of the issues I was having, but now I'm faced with
something that seems a little unique. Maybe I'm not understanding something
basic, maybe not... Anyway, my repository home directory is set to:
<property name="homeDirectory">/data/GuvnorRepo/</property>
First noob question is where should I put the data directory? The reason I
ask is that no matter where I put it, when I start up the web application, I
get the following (summarized and annotated) stack trace:
[4/19/10 8:38:16:863 CDT] 00000016 WebGroup A SRVE0169I: Loading Web
Module: JBoss Drools Guvnor.
[4/19/10 8:38:50:052 CDT] 00000016 WebApp E Exception caught while
initializing context
org.jboss.seam.InstantiationException: Could not instantiate Seam component:
repositoryConfiguration
at org.jboss.seam.Component.newInstance(Component.java:2066)
(**edit: a bunch more seam related**)
(**edit: a bunch more ibm.ws.webcontainer related**)
(**edit: a bunch more ibm.ws.runtime related**)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1473)
Caused by: org.drools.repository.RulesRepositoryException:
javax.jcr.RepositoryException: Automatic repository configuration failed:
\data\GuvnorRepo\repository.xml (The system cannot find the path
specified.): \data\GuvnorRepo\repository.xml (The system cannot find the
path specified.)
at
org.drools.guvnor.server.repository.BRMSRepositoryConfiguration.newSession(BRMSRepositoryConfiguration.java:116)
at
org.drools.guvnor.server.repository.BRMSRepositoryConfiguration.create(BRMSRepositoryConfiguration.java:56)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
(**edit: a bunch more reflect related**)
(**edit: a bunch more seam related **)
at
org.drools.guvnor.server.repository.BRMSRepositoryConfiguration_$$_javassist_0.create(BRMSRepositoryConfiguration_$$_javassist_0.java)
(**edit: a bunch more seam related**)
... 22 more
Caused by: javax.jcr.RepositoryException: Automatic repository configuration
failed: \data\GuvnorRepo\repository.xml (The system cannot find the path
specified.): \data\GuvnorRepo\repository.xml (The system cannot find the
path specified.)
at
org.apache.jackrabbit.core.TransientRepository$2.getRepository(TransientRepository.java:247)
at
org.apache.jackrabbit.core.TransientRepository.startRepository(TransientRepository.java:265)
at
org.apache.jackrabbit.core.TransientRepository.login(TransientRepository.java:333)
at
org.apache.jackrabbit.core.TransientRepository.login(TransientRepository.java:363)
at
org.drools.guvnor.server.repository.BRMSRepositoryConfiguration.newSession(BRMSRepositoryConfiguration.java:112)
... 47 more
Caused by: java.io.FileNotFoundException: \data\GuvnorRepo\repository.xml
(The system cannot find the path specified.)
at java.io.FileOutputStream.<init>(FileOutputStream.java:205)
at java.io.FileOutputStream.<init>(FileOutputStream.java:157)
at
org.apache.jackrabbit.core.TransientRepository$2.getRepository(TransientRepository.java:218)
... 51 more
Is this something that should be available in my application server setup
already as in Tomcat's data directory? Websphere does not provide it as far
as I know, but there's an alternative, my Websphere application directory,
and if I put data there, I get the same error. I've also tried my Eclipse
project's root and the WEB-INF.
While debugging it, I tried to take all folder structure out and see where
the repository.xml file would appear, but not only it did not, it gave me a
different error on startup. So, with this in components.xml:
<property name="homeDirectory"></property>
I get:
[4/19/10 8:49:48:773 CDT] 00000026 WebGroup A SRVE0169I: Loading Web
Module: JBoss Drools Guvnor.
[4/19/10 8:49:53:992 CDT] 00000026 WebApp E Exception caught while
initializing context
org.jboss.seam.InstantiationException: Could not instantiate Seam component:
repositoryConfiguration
at org.jboss.seam.Component.newInstance(Component.java:2066)
(**edit: a bunch more seam related**)
(**edit: a bunch more ibm.ws related**)
(DeployedApplicationImpl.java:1138)
(**edit: a bunch more reflect related**)
(**edit: a bunch more ibm.ws related**)
at java.lang.Thread.run(Thread.java:810)
Caused by: org.drools.repository.RulesRepositoryException:
javax.jcr.RepositoryException: Invalid repository configuration:
/repository.xml: Configuration file syntax error.: Premature end of file.:
Configuration file syntax error.: Premature end of file.: Premature end of
file. at
org.drools.guvnor.server.repository.BRMSRepositoryConfiguration.newSession(BRMSRepositoryConfiguration.java:116)
at
org.drools.guvnor.server.repository.BRMSRepositoryConfiguration.create(BRMSRepositoryConfiguration.java:56)
(**edit: a bunch more reflect and seam related**)
at
org.drools.guvnor.server.repository.BRMSRepositoryConfiguration_$$_javassist_0.create(BRMSRepositoryConfiguration_$$_javassist_0.java)
(**edit: a bunch more reflect and seam related**)
at org.jboss.seam.Component.newInstance(Component.java:2054)
... 62 more
Caused by: javax.jcr.RepositoryException: Invalid repository configuration:
/repository.xml: Configuration file syntax error.: Premature end of file.:
Configuration file syntax error.: Premature end of file.: Premature end of
file. at
org.apache.jackrabbit.core.TransientRepository$2.getRepository(TransientRepository.java:250)
at
org.apache.jackrabbit.core.TransientRepository.startRepository(TransientRepository.java:265)
at
org.apache.jackrabbit.core.TransientRepository.login(TransientRepository.java:333)
at
org.apache.jackrabbit.core.TransientRepository.login(TransientRepository.java:363)
at
org.drools.guvnor.server.repository.BRMSRepositoryConfiguration.newSession(BRMSRepositoryConfiguration.java:112)
... 87 more
Caused by: org.apache.jackrabbit.core.config.ConfigurationException:
Configuration file syntax error.: Premature end of file.: Premature end of
file.
at
org.apache.jackrabbit.core.config.ConfigurationParser.parseXML(ConfigurationParser.java:199)
at
org.apache.jackrabbit.core.config.RepositoryConfigurationParser.parseWorkspaceConfig(RepositoryConfigurationParser.java:343)
at
org.apache.jackrabbit.core.config.RepositoryConfig.loadWorkspaceConfig(RepositoryConfig.java:368)
at
org.apache.jackrabbit.core.config.RepositoryConfig.init(RepositoryConfig.java:323)
at
org.apache.jackrabbit.core.config.RepositoryConfig.create(RepositoryConfig.java:142)
at
org.apache.jackrabbit.core.config.RepositoryConfig.create(RepositoryConfig.java:83)
at
org.apache.jackrabbit.core.TransientRepository$2.getRepository(TransientRepository.java:244)
... 91 more
Caused by: org.xml.sax.SAXParseException: Premature end of file.
at org.apache.xerces.parsers.DOMParser.parse(Unknown Source)
at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source)
at
org.apache.jackrabbit.core.config.ConfigurationParser.parseXML(ConfigurationParser.java:193)
... 97 more
[4/19/10 8:49:53:977 CDT] 00000026 SystemErr R [Fatal Error] :-1:-1:
Premature end of file.
It says premature end of file, but it's not anywhere... Soooo.... any ideas?
What am I missing, and what should I do?
Any help is appreciated, thanks!
Mauricio
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15 years, 11 months
Re: [rules-users] Drools Planner - How often are the Move Factory classes called?
by Samuel Deballon
Hi,
If your class extends CachedMoveFactory, the drools planner will call your
move factory only once at start.
But if it extends AbstractMoveFactory, the drools planner will be call at
each step
Samuel
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|------------>
| From: |
|------------>
>--------------------------------------------------------------------------------------------------------------------------------------------------|
|"awuttke [via Drools - Java Rules Engine]" <ml-node+723534-485842754-91648(a)n3.nabble.com> |
>--------------------------------------------------------------------------------------------------------------------------------------------------|
|------------>
| To: |
|------------>
>--------------------------------------------------------------------------------------------------------------------------------------------------|
|Samuel Deballon/FRA/CSC@CSC |
>--------------------------------------------------------------------------------------------------------------------------------------------------|
|------------>
| Date: |
|------------>
>--------------------------------------------------------------------------------------------------------------------------------------------------|
|16/04/2010 11:22 |
>--------------------------------------------------------------------------------------------------------------------------------------------------|
|------------>
| Subject: |
|------------>
>--------------------------------------------------------------------------------------------------------------------------------------------------|
|Drools Planner - How often are the Move Factory classes called? |
>--------------------------------------------------------------------------------------------------------------------------------------------------|
I've been working with the Drools Planner for some time now and found that
the Move Factory Classes seem to be called only once just before the first
solver iteration. Each iteration seems to get it's moves from this initial
'move pool' generated by the move factories.
However, in the documentation it is mentioned that the move factory would
be called for each iteration and would therefore allow me to modify the
move generation algorithm for each iteration.
So what is true for the current version of the planner 5.1.0? Can I
configure different ways of using the move factories during the solution
process?
I'm using a standard tabu search configuration, based on the lesson
schedule example.
Thank you,
Andreas Wuttke
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15 years, 11 months
